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.04.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 17:14:45,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 17:14:45,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 17:14:45,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 17:14:45,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 17:14:45,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 17:14:45,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 17:14:45,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 17:14:45,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 17:14:45,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 17:14:45,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 17:14:45,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 17:14:45,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 17:14:45,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 17:14:45,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 17:14:45,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 17:14:45,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 17:14:45,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 17:14:45,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 17:14:45,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 17:14:45,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 17:14:45,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 17:14:45,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 17:14:45,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 17:14:45,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 17:14:45,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 17:14:45,407 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 17:14:45,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 17:14:45,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 17:14:45,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 17:14:45,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 17:14:45,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 17:14:45,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 17:14:45,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 17:14:45,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 17:14:45,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 17:14:45,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 17:14:45,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 17:14:45,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 17:14:45,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 17:14:45,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 17:14:45,417 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 17:14:45,437 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 17:14:45,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 17:14:45,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 17:14:45,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 17:14:45,439 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 17:14:45,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 17:14:45,439 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 17:14:45,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 17:14:45,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 17:14:45,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 17:14:45,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 17:14:45,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 17:14:45,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 17:14:45,442 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 17:14:45,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 17:14:45,442 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 17:14:45,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 17:14:45,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 17:14:45,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 17:14:45,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 17:14:45,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 17:14:45,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:14:45,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 17:14:45,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 17:14:45,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 17:14:45,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 17:14:45,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 17:14:45,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 17:14:45,445 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 17:14:45,717 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 17:14:45,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 17:14:45,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 17:14:45,735 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 17:14:45,735 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 17:14:45,736 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.04.cil-2.c [2019-10-07 17:14:45,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ecae48c2/d3829653b1414338b291e3e949ea6093/FLAG008cb95e7 [2019-10-07 17:14:46,211 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 17:14:46,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.04.cil-2.c [2019-10-07 17:14:46,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ecae48c2/d3829653b1414338b291e3e949ea6093/FLAG008cb95e7 [2019-10-07 17:14:46,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ecae48c2/d3829653b1414338b291e3e949ea6093 [2019-10-07 17:14:46,630 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 17:14:46,632 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 17:14:46,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:46,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 17:14:46,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 17:14:46,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:46" (1/1) ... [2019-10-07 17:14:46,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac258e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:46, skipping insertion in model container [2019-10-07 17:14:46,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:14:46" (1/1) ... [2019-10-07 17:14:46,649 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 17:14:46,705 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 17:14:46,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:46,924 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 17:14:47,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:14:47,125 INFO L192 MainTranslator]: Completed translation [2019-10-07 17:14:47,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47 WrapperNode [2019-10-07 17:14:47,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 17:14:47,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 17:14:47,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 17:14:47,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 17:14:47,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47" (1/1) ... [2019-10-07 17:14:47,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47" (1/1) ... [2019-10-07 17:14:47,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47" (1/1) ... [2019-10-07 17:14:47,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47" (1/1) ... [2019-10-07 17:14:47,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47" (1/1) ... [2019-10-07 17:14:47,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47" (1/1) ... [2019-10-07 17:14:47,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47" (1/1) ... [2019-10-07 17:14:47,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 17:14:47,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 17:14:47,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 17:14:47,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 17:14:47,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47" (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 17:14:47,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 17:14:47,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 17:14:47,309 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-07 17:14:47,310 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-07 17:14:47,310 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-07 17:14:47,311 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-07 17:14:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-10-07 17:14:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-10-07 17:14:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-07 17:14:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-07 17:14:47,313 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-07 17:14:47,314 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-10-07 17:14:47,314 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-10-07 17:14:47,315 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-07 17:14:47,315 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-07 17:14:47,315 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-07 17:14:47,317 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 17:14:47,317 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-07 17:14:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-07 17:14:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-07 17:14:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-07 17:14:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-07 17:14:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-07 17:14:47,318 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-07 17:14:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-07 17:14:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-07 17:14:47,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 17:14:47,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 17:14:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-07 17:14:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-07 17:14:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-07 17:14:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-07 17:14:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-10-07 17:14:47,320 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-10-07 17:14:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-07 17:14:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 17:14:47,321 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-07 17:14:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-07 17:14:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-07 17:14:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-10-07 17:14:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-10-07 17:14:47,322 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-07 17:14:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-07 17:14:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-07 17:14:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 17:14:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-07 17:14:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-07 17:14:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-07 17:14:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-07 17:14:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-07 17:14:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-07 17:14:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-07 17:14:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-07 17:14:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 17:14:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 17:14:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 17:14:48,851 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 17:14:48,852 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-07 17:14:48,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:48 BoogieIcfgContainer [2019-10-07 17:14:48,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 17:14:48,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 17:14:48,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 17:14:48,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 17:14:48,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 05:14:46" (1/3) ... [2019-10-07 17:14:48,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117515b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:48, skipping insertion in model container [2019-10-07 17:14:48,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:14:47" (2/3) ... [2019-10-07 17:14:48,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117515b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:14:48, skipping insertion in model container [2019-10-07 17:14:48,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:14:48" (3/3) ... [2019-10-07 17:14:48,862 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2019-10-07 17:14:48,872 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 17:14:48,883 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 17:14:48,897 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 17:14:48,929 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 17:14:48,930 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 17:14:48,930 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 17:14:48,930 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 17:14:48,931 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 17:14:48,932 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 17:14:48,932 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 17:14:48,932 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 17:14:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2019-10-07 17:14:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-07 17:14:48,990 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:48,991 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:14:48,994 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:49,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2119339724, now seen corresponding path program 1 times [2019-10-07 17:14:49,014 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:49,014 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:49,015 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:49,015 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:49,479 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 17:14:49,480 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:49,480 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:14:49,481 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:14:49,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:49,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:49,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:14:49,503 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 4 states. [2019-10-07 17:14:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:49,912 INFO L93 Difference]: Finished difference Result 446 states and 623 transitions. [2019-10-07 17:14:49,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:49,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2019-10-07 17:14:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:49,932 INFO L225 Difference]: With dead ends: 446 [2019-10-07 17:14:49,933 INFO L226 Difference]: Without dead ends: 286 [2019-10-07 17:14:49,941 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:14:49,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-10-07 17:14:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2019-10-07 17:14:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2019-10-07 17:14:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 368 transitions. [2019-10-07 17:14:50,114 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 368 transitions. Word has length 78 [2019-10-07 17:14:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:50,115 INFO L462 AbstractCegarLoop]: Abstraction has 285 states and 368 transitions. [2019-10-07 17:14:50,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 368 transitions. [2019-10-07 17:14:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-07 17:14:50,133 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:50,134 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, 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] [2019-10-07 17:14:50,135 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:50,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1694527536, now seen corresponding path program 1 times [2019-10-07 17:14:50,137 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:50,137 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:50,163 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:50,163 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-07 17:14:50,387 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:50,387 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:50,387 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 17:14:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:50,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:50,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-07 17:14:50,706 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-07 17:14:50,906 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:50,907 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-07 17:14:50,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:50,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:50,910 INFO L87 Difference]: Start difference. First operand 285 states and 368 transitions. Second operand 4 states. [2019-10-07 17:14:51,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:51,016 INFO L93 Difference]: Finished difference Result 504 states and 662 transitions. [2019-10-07 17:14:51,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:51,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-10-07 17:14:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:51,030 INFO L225 Difference]: With dead ends: 504 [2019-10-07 17:14:51,031 INFO L226 Difference]: Without dead ends: 364 [2019-10-07 17:14:51,033 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 275 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:51,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-10-07 17:14:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 320. [2019-10-07 17:14:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-07 17:14:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 424 transitions. [2019-10-07 17:14:51,098 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 424 transitions. Word has length 138 [2019-10-07 17:14:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:51,102 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 424 transitions. [2019-10-07 17:14:51,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 424 transitions. [2019-10-07 17:14:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-07 17:14:51,112 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:51,112 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, 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, 1, 1] [2019-10-07 17:14:51,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:51,320 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:51,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:51,321 INFO L82 PathProgramCache]: Analyzing trace with hash -104772843, now seen corresponding path program 1 times [2019-10-07 17:14:51,321 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:51,321 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:51,322 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:51,322 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 111 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 17:14:51,508 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 17:14:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:51,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 17:14:51,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-07 17:14:51,821 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-10-07 17:14:52,095 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:52,095 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-07 17:14:52,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:52,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:52,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:52,097 INFO L87 Difference]: Start difference. First operand 320 states and 424 transitions. Second operand 3 states. [2019-10-07 17:14:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:52,191 INFO L93 Difference]: Finished difference Result 918 states and 1258 transitions. [2019-10-07 17:14:52,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:52,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2019-10-07 17:14:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:52,197 INFO L225 Difference]: With dead ends: 918 [2019-10-07 17:14:52,197 INFO L226 Difference]: Without dead ends: 614 [2019-10-07 17:14:52,199 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 365 SyntacticMatches, 8 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:14:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-10-07 17:14:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 607. [2019-10-07 17:14:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-07 17:14:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 808 transitions. [2019-10-07 17:14:52,244 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 808 transitions. Word has length 186 [2019-10-07 17:14:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:52,244 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 808 transitions. [2019-10-07 17:14:52,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 808 transitions. [2019-10-07 17:14:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-07 17:14:52,249 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:52,249 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, 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, 1, 1] [2019-10-07 17:14:52,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:52,463 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash -272235167, now seen corresponding path program 1 times [2019-10-07 17:14:52,464 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:52,464 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:52,464 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:52,465 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:52,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-07 17:14:52,601 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:52,601 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:52,601 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 17:14:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:52,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:52,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-07 17:14:52,856 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-07 17:14:53,111 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:53,111 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:14:53,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:53,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:53,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:53,113 INFO L87 Difference]: Start difference. First operand 607 states and 808 transitions. Second operand 4 states. [2019-10-07 17:14:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:53,409 INFO L93 Difference]: Finished difference Result 1768 states and 2502 transitions. [2019-10-07 17:14:53,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:53,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-10-07 17:14:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:53,423 INFO L225 Difference]: With dead ends: 1768 [2019-10-07 17:14:53,423 INFO L226 Difference]: Without dead ends: 1177 [2019-10-07 17:14:53,430 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 373 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 17:14:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2019-10-07 17:14:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1163. [2019-10-07 17:14:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2019-10-07 17:14:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1537 transitions. [2019-10-07 17:14:53,532 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1537 transitions. Word has length 186 [2019-10-07 17:14:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:53,532 INFO L462 AbstractCegarLoop]: Abstraction has 1163 states and 1537 transitions. [2019-10-07 17:14:53,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1537 transitions. [2019-10-07 17:14:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-07 17:14:53,545 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:53,545 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, 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, 1, 1] [2019-10-07 17:14:53,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:53,751 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:53,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:53,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1217605220, now seen corresponding path program 1 times [2019-10-07 17:14:53,752 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:53,752 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:53,752 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:53,753 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-07 17:14:53,920 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:53,920 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:53,921 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 17:14:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:54,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:54,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-07 17:14:54,223 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-07 17:14:54,489 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:54,489 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:14:54,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:54,492 INFO L87 Difference]: Start difference. First operand 1163 states and 1537 transitions. Second operand 4 states. [2019-10-07 17:14:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:54,880 INFO L93 Difference]: Finished difference Result 3416 states and 4809 transitions. [2019-10-07 17:14:54,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:54,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-10-07 17:14:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:54,899 INFO L225 Difference]: With dead ends: 3416 [2019-10-07 17:14:54,899 INFO L226 Difference]: Without dead ends: 2269 [2019-10-07 17:14:54,908 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 373 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 17:14:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2019-10-07 17:14:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2245. [2019-10-07 17:14:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2019-10-07 17:14:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 2949 transitions. [2019-10-07 17:14:55,062 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 2949 transitions. Word has length 186 [2019-10-07 17:14:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:55,064 INFO L462 AbstractCegarLoop]: Abstraction has 2245 states and 2949 transitions. [2019-10-07 17:14:55,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 2949 transitions. [2019-10-07 17:14:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-07 17:14:55,076 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:55,076 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, 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, 1, 1] [2019-10-07 17:14:55,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:55,283 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash -773567800, now seen corresponding path program 1 times [2019-10-07 17:14:55,284 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:55,284 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:55,284 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:55,284 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-07 17:14:55,397 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:55,397 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:55,397 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 17:14:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:55,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:14:55,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-07 17:14:55,696 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-07 17:14:55,904 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:14:55,904 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-07 17:14:55,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:14:55,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:14:55,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:14:55,906 INFO L87 Difference]: Start difference. First operand 2245 states and 2949 transitions. Second operand 4 states. [2019-10-07 17:14:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:56,402 INFO L93 Difference]: Finished difference Result 6622 states and 9315 transitions. [2019-10-07 17:14:56,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:14:56,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-10-07 17:14:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:56,442 INFO L225 Difference]: With dead ends: 6622 [2019-10-07 17:14:56,442 INFO L226 Difference]: Without dead ends: 4393 [2019-10-07 17:14:56,466 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 373 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 17:14:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2019-10-07 17:14:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 4349. [2019-10-07 17:14:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4349 states. [2019-10-07 17:14:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 5699 transitions. [2019-10-07 17:14:56,793 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 5699 transitions. Word has length 186 [2019-10-07 17:14:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:56,794 INFO L462 AbstractCegarLoop]: Abstraction has 4349 states and 5699 transitions. [2019-10-07 17:14:56,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:14:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 5699 transitions. [2019-10-07 17:14:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-07 17:14:56,820 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:56,820 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, 3, 3, 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] [2019-10-07 17:14:57,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:57,033 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1579190277, now seen corresponding path program 1 times [2019-10-07 17:14:57,036 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:57,036 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:57,036 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:57,037 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-07 17:14:57,181 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:57,182 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:57,182 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 17:14:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:57,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:14:57,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-07 17:14:57,474 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-07 17:14:57,723 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:57,723 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-07 17:14:57,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:14:57,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:14:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:14:57,725 INFO L87 Difference]: Start difference. First operand 4349 states and 5699 transitions. Second operand 3 states. [2019-10-07 17:14:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:14:57,994 INFO L93 Difference]: Finished difference Result 8141 states and 10933 transitions. [2019-10-07 17:14:57,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:14:57,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-10-07 17:14:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:14:58,046 INFO L225 Difference]: With dead ends: 8141 [2019-10-07 17:14:58,046 INFO L226 Difference]: Without dead ends: 5925 [2019-10-07 17:14:58,072 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 403 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 17:14:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2019-10-07 17:14:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 4883. [2019-10-07 17:14:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4883 states. [2019-10-07 17:14:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 6469 transitions. [2019-10-07 17:14:58,406 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 6469 transitions. Word has length 202 [2019-10-07 17:14:58,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:14:58,406 INFO L462 AbstractCegarLoop]: Abstraction has 4883 states and 6469 transitions. [2019-10-07 17:14:58,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:14:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 6469 transitions. [2019-10-07 17:14:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-07 17:14:58,434 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:14:58,435 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, 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, 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 17:14:58,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:58,649 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:14:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:14:58,650 INFO L82 PathProgramCache]: Analyzing trace with hash -126022762, now seen corresponding path program 1 times [2019-10-07 17:14:58,650 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:14:58,650 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:58,650 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:58,650 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:14:58,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:14:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-10-07 17:14:58,953 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:14:58,953 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:14:58,953 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 17:14:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:14:59,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-07 17:14:59,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:14:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-07 17:14:59,369 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:14:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-10-07 17:14:59,710 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:14:59,710 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-10-07 17:14:59,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 17:14:59,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 17:14:59,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-10-07 17:14:59,712 INFO L87 Difference]: Start difference. First operand 4883 states and 6469 transitions. Second operand 6 states. [2019-10-07 17:15:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:15:00,514 INFO L93 Difference]: Finished difference Result 8353 states and 11220 transitions. [2019-10-07 17:15:00,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 17:15:00,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 276 [2019-10-07 17:15:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:15:00,549 INFO L225 Difference]: With dead ends: 8353 [2019-10-07 17:15:00,550 INFO L226 Difference]: Without dead ends: 5603 [2019-10-07 17:15:00,577 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 554 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 17:15:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5603 states. [2019-10-07 17:15:00,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5603 to 5603. [2019-10-07 17:15:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2019-10-07 17:15:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 7189 transitions. [2019-10-07 17:15:00,939 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 7189 transitions. Word has length 276 [2019-10-07 17:15:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:15:00,940 INFO L462 AbstractCegarLoop]: Abstraction has 5603 states and 7189 transitions. [2019-10-07 17:15:00,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 17:15:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 7189 transitions. [2019-10-07 17:15:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-10-07 17:15:00,970 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:15:00,971 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, 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, 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] [2019-10-07 17:15:01,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:01,195 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:15:01,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:15:01,195 INFO L82 PathProgramCache]: Analyzing trace with hash -207815019, now seen corresponding path program 1 times [2019-10-07 17:15:01,195 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:15:01,196 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:01,196 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:01,196 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:15:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-10-07 17:15:01,460 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:01,460 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:15:01,460 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 17:15:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:01,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 17:15:01,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:15:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-07 17:15:01,805 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:15:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-10-07 17:15:02,056 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:15:02,056 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2019-10-07 17:15:02,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:15:02,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:15:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:15:02,058 INFO L87 Difference]: Start difference. First operand 5603 states and 7189 transitions. Second operand 3 states. [2019-10-07 17:15:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:15:02,299 INFO L93 Difference]: Finished difference Result 8729 states and 11567 transitions. [2019-10-07 17:15:02,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:15:02,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 276 [2019-10-07 17:15:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:15:02,339 INFO L225 Difference]: With dead ends: 8729 [2019-10-07 17:15:02,339 INFO L226 Difference]: Without dead ends: 5615 [2019-10-07 17:15:02,363 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:15:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5615 states. [2019-10-07 17:15:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5615 to 5571. [2019-10-07 17:15:02,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5571 states. [2019-10-07 17:15:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5571 states to 5571 states and 7069 transitions. [2019-10-07 17:15:02,747 INFO L78 Accepts]: Start accepts. Automaton has 5571 states and 7069 transitions. Word has length 276 [2019-10-07 17:15:02,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:15:02,748 INFO L462 AbstractCegarLoop]: Abstraction has 5571 states and 7069 transitions. [2019-10-07 17:15:02,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:15:02,751 INFO L276 IsEmpty]: Start isEmpty. Operand 5571 states and 7069 transitions. [2019-10-07 17:15:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-07 17:15:02,778 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:15:02,779 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, 3, 3, 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] [2019-10-07 17:15:02,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:02,994 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:15:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:15:02,995 INFO L82 PathProgramCache]: Analyzing trace with hash 701511171, now seen corresponding path program 1 times [2019-10-07 17:15:02,995 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:15:02,995 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:02,996 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:02,996 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:15:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-07 17:15:03,125 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:03,126 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:15:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:03,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:15:03,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:15:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-07 17:15:03,428 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:15:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-07 17:15:03,615 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:15:03,616 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-07 17:15:03,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:15:03,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:15:03,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:15:03,619 INFO L87 Difference]: Start difference. First operand 5571 states and 7069 transitions. Second operand 3 states. [2019-10-07 17:15:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:15:04,142 INFO L93 Difference]: Finished difference Result 10343 states and 13414 transitions. [2019-10-07 17:15:04,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:15:04,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-10-07 17:15:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:15:04,199 INFO L225 Difference]: With dead ends: 10343 [2019-10-07 17:15:04,199 INFO L226 Difference]: Without dead ends: 7251 [2019-10-07 17:15:04,215 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 403 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 17:15:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2019-10-07 17:15:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 6331. [2019-10-07 17:15:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6331 states. [2019-10-07 17:15:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 8155 transitions. [2019-10-07 17:15:04,583 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 8155 transitions. Word has length 202 [2019-10-07 17:15:04,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:15:04,583 INFO L462 AbstractCegarLoop]: Abstraction has 6331 states and 8155 transitions. [2019-10-07 17:15:04,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:15:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 8155 transitions. [2019-10-07 17:15:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-07 17:15:04,621 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:15:04,621 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, 3, 3, 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] [2019-10-07 17:15:04,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:04,826 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:15:04,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:15:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash 317482813, now seen corresponding path program 1 times [2019-10-07 17:15:04,827 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:15:04,827 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:04,827 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:04,827 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:15:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-07 17:15:04,947 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:04,947 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:15:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:05,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:15:05,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:15:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-07 17:15:05,376 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:15:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-07 17:15:05,596 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:15:05,596 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-07 17:15:05,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:15:05,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:15:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:15:05,598 INFO L87 Difference]: Start difference. First operand 6331 states and 8155 transitions. Second operand 3 states. [2019-10-07 17:15:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:15:06,220 INFO L93 Difference]: Finished difference Result 11511 states and 15194 transitions. [2019-10-07 17:15:06,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:15:06,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-10-07 17:15:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:15:06,256 INFO L225 Difference]: With dead ends: 11511 [2019-10-07 17:15:06,256 INFO L226 Difference]: Without dead ends: 8406 [2019-10-07 17:15:06,274 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 403 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 17:15:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8406 states. [2019-10-07 17:15:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8406 to 7410. [2019-10-07 17:15:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7410 states. [2019-10-07 17:15:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 9685 transitions. [2019-10-07 17:15:06,684 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 9685 transitions. Word has length 202 [2019-10-07 17:15:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:15:06,685 INFO L462 AbstractCegarLoop]: Abstraction has 7410 states and 9685 transitions. [2019-10-07 17:15:06,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:15:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 9685 transitions. [2019-10-07 17:15:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-07 17:15:06,719 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:15:06,720 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, 3, 3, 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] [2019-10-07 17:15:06,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:06,926 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:15:06,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:15:06,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1468298496, now seen corresponding path program 1 times [2019-10-07 17:15:06,926 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:15:06,926 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:06,927 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:06,927 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:15:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-07 17:15:07,051 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:07,051 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:15:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:07,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:15:07,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:15:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-07 17:15:07,516 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:15:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-07 17:15:07,914 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 17:15:07,914 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-07 17:15:07,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:15:07,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:15:07,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:15:07,915 INFO L87 Difference]: Start difference. First operand 7410 states and 9685 transitions. Second operand 4 states. [2019-10-07 17:15:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:15:08,345 INFO L93 Difference]: Finished difference Result 12331 states and 16020 transitions. [2019-10-07 17:15:08,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:15:08,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 202 [2019-10-07 17:15:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:15:08,382 INFO L225 Difference]: With dead ends: 12331 [2019-10-07 17:15:08,382 INFO L226 Difference]: Without dead ends: 8758 [2019-10-07 17:15:08,402 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 397 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:15:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8758 states. [2019-10-07 17:15:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8758 to 8758. [2019-10-07 17:15:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8758 states. [2019-10-07 17:15:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 11041 transitions. [2019-10-07 17:15:08,864 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 11041 transitions. Word has length 202 [2019-10-07 17:15:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:15:08,867 INFO L462 AbstractCegarLoop]: Abstraction has 8758 states and 11041 transitions. [2019-10-07 17:15:08,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:15:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 11041 transitions. [2019-10-07 17:15:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-07 17:15:08,892 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:15:08,892 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, 3, 3, 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] [2019-10-07 17:15:09,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:09,098 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:15:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:15:09,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1653092256, now seen corresponding path program 2 times [2019-10-07 17:15:09,099 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:15:09,099 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:09,099 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:09,100 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:15:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-07 17:15:09,199 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:09,199 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:15:09,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:09,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-07 17:15:09,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 17:15:09,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-07 17:15:09,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:15:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-07 17:15:09,739 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:15:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-10-07 17:15:10,407 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:15:10,407 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 9] total 13 [2019-10-07 17:15:10,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:15:10,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:15:10,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-07 17:15:10,408 INFO L87 Difference]: Start difference. First operand 8758 states and 11041 transitions. Second operand 4 states. [2019-10-07 17:15:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:15:10,897 INFO L93 Difference]: Finished difference Result 15455 states and 19441 transitions. [2019-10-07 17:15:10,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:15:10,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 202 [2019-10-07 17:15:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:15:10,941 INFO L225 Difference]: With dead ends: 15455 [2019-10-07 17:15:10,941 INFO L226 Difference]: Without dead ends: 10614 [2019-10-07 17:15:10,963 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 396 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-07 17:15:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10614 states. [2019-10-07 17:15:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10614 to 10582. [2019-10-07 17:15:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10582 states. [2019-10-07 17:15:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10582 states to 10582 states and 12889 transitions. [2019-10-07 17:15:11,519 INFO L78 Accepts]: Start accepts. Automaton has 10582 states and 12889 transitions. Word has length 202 [2019-10-07 17:15:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:15:11,519 INFO L462 AbstractCegarLoop]: Abstraction has 10582 states and 12889 transitions. [2019-10-07 17:15:11,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:15:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 10582 states and 12889 transitions. [2019-10-07 17:15:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-07 17:15:11,544 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:15:11,544 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, 3, 3, 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] [2019-10-07 17:15:11,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:11,748 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:15:11,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:15:11,749 INFO L82 PathProgramCache]: Analyzing trace with hash 680162478, now seen corresponding path program 2 times [2019-10-07 17:15:11,749 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:15:11,750 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:11,750 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:11,750 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:11,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:15:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-07 17:15:12,420 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:12,420 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:15:12,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:12,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-07 17:15:12,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 17:15:12,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-07 17:15:12,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:15:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 53 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-07 17:15:12,937 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:15:13,362 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-10-07 17:15:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-07 17:15:13,449 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:15:13,450 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 9] total 13 [2019-10-07 17:15:13,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:15:13,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:15:13,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-07 17:15:13,451 INFO L87 Difference]: Start difference. First operand 10582 states and 12889 transitions. Second operand 4 states. [2019-10-07 17:15:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:15:13,972 INFO L93 Difference]: Finished difference Result 17451 states and 21413 transitions. [2019-10-07 17:15:13,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:15:13,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 202 [2019-10-07 17:15:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:15:14,018 INFO L225 Difference]: With dead ends: 17451 [2019-10-07 17:15:14,018 INFO L226 Difference]: Without dead ends: 11716 [2019-10-07 17:15:14,041 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 396 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-07 17:15:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11716 states. [2019-10-07 17:15:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11716 to 11398. [2019-10-07 17:15:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11398 states. [2019-10-07 17:15:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11398 states to 11398 states and 13641 transitions. [2019-10-07 17:15:14,695 INFO L78 Accepts]: Start accepts. Automaton has 11398 states and 13641 transitions. Word has length 202 [2019-10-07 17:15:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:15:14,695 INFO L462 AbstractCegarLoop]: Abstraction has 11398 states and 13641 transitions. [2019-10-07 17:15:14,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:15:14,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11398 states and 13641 transitions. [2019-10-07 17:15:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-07 17:15:14,721 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:15:14,721 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, 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, 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 17:15:14,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:14,928 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:15:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:15:14,929 INFO L82 PathProgramCache]: Analyzing trace with hash -840914336, now seen corresponding path program 1 times [2019-10-07 17:15:14,929 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:15:14,929 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:14,930 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:14,930 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:15:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-07 17:15:15,045 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:15,045 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:15:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:15,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 17:15:15,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:15:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-07 17:15:15,447 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:15:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-07 17:15:15,622 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 17:15:15,622 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-07 17:15:15,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:15:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:15:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-07 17:15:15,624 INFO L87 Difference]: Start difference. First operand 11398 states and 13641 transitions. Second operand 3 states. [2019-10-07 17:15:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:15:16,025 INFO L93 Difference]: Finished difference Result 20203 states and 24692 transitions. [2019-10-07 17:15:16,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:15:16,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2019-10-07 17:15:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:15:16,081 INFO L225 Difference]: With dead ends: 20203 [2019-10-07 17:15:16,081 INFO L226 Difference]: Without dead ends: 14278 [2019-10-07 17:15:16,106 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 405 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 17:15:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14278 states. [2019-10-07 17:15:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14278 to 12926. [2019-10-07 17:15:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12926 states. [2019-10-07 17:15:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12926 states to 12926 states and 15801 transitions. [2019-10-07 17:15:16,968 INFO L78 Accepts]: Start accepts. Automaton has 12926 states and 15801 transitions. Word has length 203 [2019-10-07 17:15:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:15:16,969 INFO L462 AbstractCegarLoop]: Abstraction has 12926 states and 15801 transitions. [2019-10-07 17:15:16,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:15:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 12926 states and 15801 transitions. [2019-10-07 17:15:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-07 17:15:16,995 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:15:16,995 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, 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, 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 17:15:17,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:17,200 INFO L410 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:15:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:15:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash -300760509, now seen corresponding path program 1 times [2019-10-07 17:15:17,201 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:15:17,202 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:17,202 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:17,202 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:15:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:15:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-07 17:15:17,374 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:15:17,374 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:15:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:15:17,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-07 17:15:17,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:15:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 4 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-07 17:15:17,859 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:15:18,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:15:18,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:15:18,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:15:18,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 17:15:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-10-07 17:15:18,246 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 17:15:18,276 INFO L162 IcfgInterpreter]: Started Sifa with 119 locations of interest [2019-10-07 17:15:18,277 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 17:15:18,283 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 17:15:18,291 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 17:15:18,292 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 17:15:18,679 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 82 for LOIs [2019-10-07 17:15:18,732 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 139 for LOIs [2019-10-07 17:15:19,364 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2019-10-07 17:15:19,645 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 89 for LOIs [2019-10-07 17:15:19,743 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 150 for LOIs [2019-10-07 17:15:22,785 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-07 17:15:22,956 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-10-07 17:15:23,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:15:23,780 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 17:15:23,787 INFO L168 Benchmark]: Toolchain (without parser) took 37154.71 ms. Allocated memory was 141.0 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 101.3 MB in the beginning and 1.1 GB in the end (delta: -948.9 MB). Peak memory consumption was 523.3 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:23,788 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 17:15:23,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 493.17 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 101.1 MB in the beginning and 177.5 MB in the end (delta: -76.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:23,791 INFO L168 Benchmark]: Boogie Preprocessor took 102.11 ms. Allocated memory is still 202.9 MB. Free memory was 177.5 MB in the beginning and 174.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:23,792 INFO L168 Benchmark]: RCFGBuilder took 1624.56 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 174.9 MB in the beginning and 176.8 MB in the end (delta: -2.0 MB). Peak memory consumption was 90.0 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:23,793 INFO L168 Benchmark]: TraceAbstraction took 34930.00 ms. Allocated memory was 235.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 176.8 MB in the beginning and 1.1 GB in the end (delta: -873.4 MB). Peak memory consumption was 503.9 MB. Max. memory is 7.1 GB. [2019-10-07 17:15:23,801 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 493.17 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 101.1 MB in the beginning and 177.5 MB in the end (delta: -76.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 102.11 ms. Allocated memory is still 202.9 MB. Free memory was 177.5 MB in the beginning and 174.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1624.56 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 174.9 MB in the beginning and 176.8 MB in the end (delta: -2.0 MB). Peak memory consumption was 90.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 34930.00 ms. Allocated memory was 235.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 176.8 MB in the beginning and 1.1 GB in the end (delta: -873.4 MB). Peak memory consumption was 503.9 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...