/usr/bin/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-fb55353 [2019-11-07 04:51:56,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:51:56,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:51:56,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:51:56,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:51:56,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:51:56,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:51:56,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:51:56,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:51:56,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:51:56,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:51:56,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:51:56,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:51:56,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:51:56,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:51:56,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:51:56,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:51:56,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:51:56,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:51:56,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:51:56,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:51:56,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:51:56,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:51:56,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:51:56,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:51:56,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:51:56,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:51:56,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:51:56,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:51:56,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:51:56,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:51:56,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:51:56,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:51:56,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:51:56,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:51:56,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:51:56,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:51:56,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:51:56,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:51:56,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:51:56,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:51:56,176 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 [2019-11-07 04:51:56,205 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:51:56,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:51:56,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:51:56,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:51:56,207 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:51:56,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:51:56,207 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:51:56,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:51:56,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:51:56,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:51:56,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:51:56,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:51:56,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:51:56,209 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:51:56,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:51:56,209 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:51:56,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:51:56,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:51:56,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:51:56,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:51:56,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:51:56,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:51:56,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:51:56,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:51:56,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:51:56,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:51:56,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:51:56,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:51:56,211 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 [2019-11-07 04:51:56,512 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:51:56,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:51:56,534 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:51:56,536 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:51:56,536 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:51:56,537 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.04.cil-2.c [2019-11-07 04:51:56,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8937aee/d8c0d86c3d9544b19b87e01cf902a041/FLAG9f10efa3e [2019-11-07 04:51:57,126 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:51:57,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.04.cil-2.c [2019-11-07 04:51:57,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8937aee/d8c0d86c3d9544b19b87e01cf902a041/FLAG9f10efa3e [2019-11-07 04:51:57,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8937aee/d8c0d86c3d9544b19b87e01cf902a041 [2019-11-07 04:51:57,474 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:51:57,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:51:57,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:57,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:51:57,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:51:57,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:57" (1/1) ... [2019-11-07 04:51:57,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b20e7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:57, skipping insertion in model container [2019-11-07 04:51:57,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:51:57" (1/1) ... [2019-11-07 04:51:57,495 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:51:57,548 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:51:57,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:57,847 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:51:57,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:51:58,011 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:51:58,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58 WrapperNode [2019-11-07 04:51:58,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:51:58,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:51:58,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:51:58,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:51:58,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58" (1/1) ... [2019-11-07 04:51:58,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58" (1/1) ... [2019-11-07 04:51:58,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58" (1/1) ... [2019-11-07 04:51:58,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58" (1/1) ... [2019-11-07 04:51:58,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58" (1/1) ... [2019-11-07 04:51:58,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58" (1/1) ... [2019-11-07 04:51:58,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58" (1/1) ... [2019-11-07 04:51:58,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:51:58,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:51:58,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:51:58,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:51:58,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:51:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:51:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:51:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-07 04:51:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-11-07 04:51:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-11-07 04:51:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-11-07 04:51:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2019-11-07 04:51:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2019-11-07 04:51:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-11-07 04:51:58,147 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-11-07 04:51:58,147 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-11-07 04:51:58,147 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2019-11-07 04:51:58,147 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2019-11-07 04:51:58,147 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-11-07 04:51:58,147 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-11-07 04:51:58,148 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-11-07 04:51:58,148 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 04:51:58,148 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-11-07 04:51:58,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-11-07 04:51:58,148 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-11-07 04:51:58,148 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-11-07 04:51:58,149 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-11-07 04:51:58,149 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-11-07 04:51:58,149 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-11-07 04:51:58,149 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-11-07 04:51:58,149 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-07 04:51:58,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:51:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:51:58,150 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-07 04:51:58,150 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-11-07 04:51:58,150 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-11-07 04:51:58,150 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-11-07 04:51:58,150 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2019-11-07 04:51:58,150 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2019-11-07 04:51:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-11-07 04:51:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:51:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-11-07 04:51:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-11-07 04:51:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-11-07 04:51:58,151 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2019-11-07 04:51:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2019-11-07 04:51:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-11-07 04:51:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-11-07 04:51:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-11-07 04:51:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 04:51:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-11-07 04:51:58,152 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-11-07 04:51:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-11-07 04:51:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-11-07 04:51:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-11-07 04:51:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-11-07 04:51:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-11-07 04:51:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-07 04:51:58,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:51:58,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:51:58,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:51:59,511 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:51:59,511 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-07 04:51:59,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:59 BoogieIcfgContainer [2019-11-07 04:51:59,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:51:59,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:51:59,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:51:59,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:51:59,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:51:57" (1/3) ... [2019-11-07 04:51:59,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702021ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:59, skipping insertion in model container [2019-11-07 04:51:59,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:51:58" (2/3) ... [2019-11-07 04:51:59,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702021ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:51:59, skipping insertion in model container [2019-11-07 04:51:59,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:51:59" (3/3) ... [2019-11-07 04:51:59,533 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2019-11-07 04:51:59,546 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:51:59,556 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:51:59,568 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:51:59,600 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:51:59,600 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:51:59,600 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:51:59,600 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:51:59,600 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:51:59,601 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:51:59,601 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:51:59,601 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:51:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states. [2019-11-07 04:51:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-07 04:51:59,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:51:59,631 INFO L410 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] [2019-11-07 04:51:59,633 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:51:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:51:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2119339724, now seen corresponding path program 1 times [2019-11-07 04:51:59,644 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:51:59,644 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095303772] [2019-11-07 04:51:59,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:51:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:52:00,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095303772] [2019-11-07 04:52:00,009 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:52:00,010 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:52:00,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98857016] [2019-11-07 04:52:00,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:00,018 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:52:00,037 INFO L87 Difference]: Start difference. First operand 164 states. Second operand 4 states. [2019-11-07 04:52:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:00,489 INFO L93 Difference]: Finished difference Result 446 states and 623 transitions. [2019-11-07 04:52:00,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:00,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2019-11-07 04:52:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:00,509 INFO L225 Difference]: With dead ends: 446 [2019-11-07 04:52:00,509 INFO L226 Difference]: Without dead ends: 286 [2019-11-07 04:52:00,516 INFO L630 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 [2019-11-07 04:52:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-11-07 04:52:00,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2019-11-07 04:52:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2019-11-07 04:52:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 368 transitions. [2019-11-07 04:52:00,625 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 368 transitions. Word has length 78 [2019-11-07 04:52:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:00,626 INFO L462 AbstractCegarLoop]: Abstraction has 285 states and 368 transitions. [2019-11-07 04:52:00,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 368 transitions. [2019-11-07 04:52:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 04:52:00,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:00,635 INFO L410 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] [2019-11-07 04:52:00,635 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:00,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:00,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1694527536, now seen corresponding path program 1 times [2019-11-07 04:52:00,636 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:00,636 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602446364] [2019-11-07 04:52:00,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-07 04:52:00,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602446364] [2019-11-07 04:52:00,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316343859] [2019-11-07 04:52:00,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:01,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:52:01,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 04:52:01,172 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-07 04:52:01,342 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:52:01,343 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-07 04:52:01,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282397634] [2019-11-07 04:52:01,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:01,345 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:01,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:52:01,346 INFO L87 Difference]: Start difference. First operand 285 states and 368 transitions. Second operand 4 states. [2019-11-07 04:52:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:01,482 INFO L93 Difference]: Finished difference Result 504 states and 662 transitions. [2019-11-07 04:52:01,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:01,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-11-07 04:52:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:01,489 INFO L225 Difference]: With dead ends: 504 [2019-11-07 04:52:01,489 INFO L226 Difference]: Without dead ends: 364 [2019-11-07 04:52:01,491 INFO L630 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 [2019-11-07 04:52:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-11-07 04:52:01,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 320. [2019-11-07 04:52:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-11-07 04:52:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 424 transitions. [2019-11-07 04:52:01,533 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 424 transitions. Word has length 138 [2019-11-07 04:52:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:01,534 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 424 transitions. [2019-11-07 04:52:01,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 424 transitions. [2019-11-07 04:52:01,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-07 04:52:01,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:01,540 INFO L410 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] [2019-11-07 04:52:01,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:01,759 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash -104772843, now seen corresponding path program 1 times [2019-11-07 04:52:01,760 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:01,760 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884864631] [2019-11-07 04:52:01,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-07 04:52:02,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884864631] [2019-11-07 04:52:02,015 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688184170] [2019-11-07 04:52:02,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:02,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:52:02,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 04:52:02,275 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-07 04:52:02,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:52:02,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-11-07 04:52:02,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619757649] [2019-11-07 04:52:02,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:52:02,600 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:02,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:52:02,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:52:02,601 INFO L87 Difference]: Start difference. First operand 320 states and 424 transitions. Second operand 3 states. [2019-11-07 04:52:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:02,675 INFO L93 Difference]: Finished difference Result 918 states and 1258 transitions. [2019-11-07 04:52:02,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:52:02,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 186 [2019-11-07 04:52:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:02,685 INFO L225 Difference]: With dead ends: 918 [2019-11-07 04:52:02,685 INFO L226 Difference]: Without dead ends: 614 [2019-11-07 04:52:02,687 INFO L630 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 [2019-11-07 04:52:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2019-11-07 04:52:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 607. [2019-11-07 04:52:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-11-07 04:52:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 808 transitions. [2019-11-07 04:52:02,761 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 808 transitions. Word has length 186 [2019-11-07 04:52:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:02,762 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 808 transitions. [2019-11-07 04:52:02,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:52:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 808 transitions. [2019-11-07 04:52:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-07 04:52:02,778 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:02,778 INFO L410 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] [2019-11-07 04:52:02,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:02,983 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:02,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:02,984 INFO L82 PathProgramCache]: Analyzing trace with hash -272235167, now seen corresponding path program 1 times [2019-11-07 04:52:02,984 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:02,985 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618155933] [2019-11-07 04:52:02,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-07 04:52:03,131 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618155933] [2019-11-07 04:52:03,131 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158208876] [2019-11-07 04:52:03,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:03,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:52:03,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 04:52:03,428 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-07 04:52:03,627 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:52:03,628 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-11-07 04:52:03,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304474824] [2019-11-07 04:52:03,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:03,629 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:03,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:03,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:52:03,630 INFO L87 Difference]: Start difference. First operand 607 states and 808 transitions. Second operand 4 states. [2019-11-07 04:52:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:03,985 INFO L93 Difference]: Finished difference Result 1768 states and 2502 transitions. [2019-11-07 04:52:03,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:03,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-11-07 04:52:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:03,995 INFO L225 Difference]: With dead ends: 1768 [2019-11-07 04:52:03,995 INFO L226 Difference]: Without dead ends: 1177 [2019-11-07 04:52:04,000 INFO L630 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 [2019-11-07 04:52:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2019-11-07 04:52:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1163. [2019-11-07 04:52:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2019-11-07 04:52:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1537 transitions. [2019-11-07 04:52:04,111 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1537 transitions. Word has length 186 [2019-11-07 04:52:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:04,113 INFO L462 AbstractCegarLoop]: Abstraction has 1163 states and 1537 transitions. [2019-11-07 04:52:04,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:04,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1537 transitions. [2019-11-07 04:52:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-07 04:52:04,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:04,124 INFO L410 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] [2019-11-07 04:52:04,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:04,338 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:04,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1217605220, now seen corresponding path program 1 times [2019-11-07 04:52:04,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:04,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555819903] [2019-11-07 04:52:04,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:04,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-07 04:52:04,506 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555819903] [2019-11-07 04:52:04,506 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542618390] [2019-11-07 04:52:04,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:04,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:52:04,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 04:52:04,781 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-07 04:52:05,039 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:52:05,039 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-11-07 04:52:05,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503012423] [2019-11-07 04:52:05,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:05,041 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:05,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:05,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:52:05,043 INFO L87 Difference]: Start difference. First operand 1163 states and 1537 transitions. Second operand 4 states. [2019-11-07 04:52:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:05,409 INFO L93 Difference]: Finished difference Result 3416 states and 4809 transitions. [2019-11-07 04:52:05,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:05,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-11-07 04:52:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:05,426 INFO L225 Difference]: With dead ends: 3416 [2019-11-07 04:52:05,426 INFO L226 Difference]: Without dead ends: 2269 [2019-11-07 04:52:05,435 INFO L630 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 [2019-11-07 04:52:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2019-11-07 04:52:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2245. [2019-11-07 04:52:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2019-11-07 04:52:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 2949 transitions. [2019-11-07 04:52:05,580 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 2949 transitions. Word has length 186 [2019-11-07 04:52:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:05,581 INFO L462 AbstractCegarLoop]: Abstraction has 2245 states and 2949 transitions. [2019-11-07 04:52:05,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 2949 transitions. [2019-11-07 04:52:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-07 04:52:05,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:05,590 INFO L410 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] [2019-11-07 04:52:05,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:05,804 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:05,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash -773567800, now seen corresponding path program 1 times [2019-11-07 04:52:05,804 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:05,805 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075430697] [2019-11-07 04:52:05,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-07 04:52:05,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075430697] [2019-11-07 04:52:05,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877849088] [2019-11-07 04:52:05,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:06,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:52:06,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 04:52:06,277 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-07 04:52:06,484 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:52:06,484 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-11-07 04:52:06,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117454890] [2019-11-07 04:52:06,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:06,487 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:06,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:06,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:52:06,487 INFO L87 Difference]: Start difference. First operand 2245 states and 2949 transitions. Second operand 4 states. [2019-11-07 04:52:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:06,985 INFO L93 Difference]: Finished difference Result 6622 states and 9315 transitions. [2019-11-07 04:52:06,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:06,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 186 [2019-11-07 04:52:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:07,014 INFO L225 Difference]: With dead ends: 6622 [2019-11-07 04:52:07,014 INFO L226 Difference]: Without dead ends: 4393 [2019-11-07 04:52:07,032 INFO L630 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 [2019-11-07 04:52:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2019-11-07 04:52:07,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 4349. [2019-11-07 04:52:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4349 states. [2019-11-07 04:52:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 5699 transitions. [2019-11-07 04:52:07,246 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 5699 transitions. Word has length 186 [2019-11-07 04:52:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:07,247 INFO L462 AbstractCegarLoop]: Abstraction has 4349 states and 5699 transitions. [2019-11-07 04:52:07,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 5699 transitions. [2019-11-07 04:52:07,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-11-07 04:52:07,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:07,270 INFO L410 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] [2019-11-07 04:52:07,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:07,475 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:07,475 INFO L82 PathProgramCache]: Analyzing trace with hash -126022762, now seen corresponding path program 1 times [2019-11-07 04:52:07,475 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:07,476 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614517570] [2019-11-07 04:52:07,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-07 04:52:07,678 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614517570] [2019-11-07 04:52:07,678 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458423616] [2019-11-07 04:52:07,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:08,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 04:52:08,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-07 04:52:08,479 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-07 04:52:08,885 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:52:08,885 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-11-07 04:52:08,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955895984] [2019-11-07 04:52:08,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:52:08,888 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:08,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:52:08,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:52:08,890 INFO L87 Difference]: Start difference. First operand 4349 states and 5699 transitions. Second operand 6 states. [2019-11-07 04:52:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:09,555 INFO L93 Difference]: Finished difference Result 7285 states and 9681 transitions. [2019-11-07 04:52:09,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:52:09,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 276 [2019-11-07 04:52:09,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:09,587 INFO L225 Difference]: With dead ends: 7285 [2019-11-07 04:52:09,587 INFO L226 Difference]: Without dead ends: 5069 [2019-11-07 04:52:09,606 INFO L630 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 [2019-11-07 04:52:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2019-11-07 04:52:09,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 5069. [2019-11-07 04:52:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5069 states. [2019-11-07 04:52:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 6419 transitions. [2019-11-07 04:52:09,902 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 6419 transitions. Word has length 276 [2019-11-07 04:52:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:09,903 INFO L462 AbstractCegarLoop]: Abstraction has 5069 states and 6419 transitions. [2019-11-07 04:52:09,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:52:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 6419 transitions. [2019-11-07 04:52:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-07 04:52:09,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:09,931 INFO L410 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:10,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:10,137 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:10,138 INFO L82 PathProgramCache]: Analyzing trace with hash -940405798, now seen corresponding path program 1 times [2019-11-07 04:52:10,140 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:10,141 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387677958] [2019-11-07 04:52:10,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-07 04:52:10,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387677958] [2019-11-07 04:52:10,318 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100408301] [2019-11-07 04:52:10,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:10,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:52:10,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 04:52:10,706 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-07 04:52:10,893 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:52:10,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-11-07 04:52:10,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793485930] [2019-11-07 04:52:10,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:52:10,895 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:52:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:52:10,895 INFO L87 Difference]: Start difference. First operand 5069 states and 6419 transitions. Second operand 3 states. [2019-11-07 04:52:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:11,141 INFO L93 Difference]: Finished difference Result 9549 states and 12357 transitions. [2019-11-07 04:52:11,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:52:11,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-11-07 04:52:11,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:11,185 INFO L225 Difference]: With dead ends: 9549 [2019-11-07 04:52:11,185 INFO L226 Difference]: Without dead ends: 6969 [2019-11-07 04:52:11,203 INFO L630 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 [2019-11-07 04:52:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6969 states. [2019-11-07 04:52:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6969 to 5603. [2019-11-07 04:52:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2019-11-07 04:52:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 7189 transitions. [2019-11-07 04:52:11,718 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 7189 transitions. Word has length 202 [2019-11-07 04:52:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:11,719 INFO L462 AbstractCegarLoop]: Abstraction has 5603 states and 7189 transitions. [2019-11-07 04:52:11,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:52:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 7189 transitions. [2019-11-07 04:52:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-07 04:52:11,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:11,749 INFO L410 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:52:11,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:11,962 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1621482354, now seen corresponding path program 2 times [2019-11-07 04:52:11,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:11,963 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675252514] [2019-11-07 04:52:11,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-07 04:52:12,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675252514] [2019-11-07 04:52:12,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688655819] [2019-11-07 04:52:12,136 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-07 04:52:12,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 04:52:12,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:52:12,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:52:12,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-07 04:52:12,419 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-07 04:52:12,609 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:52:12,609 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [4] total 6 [2019-11-07 04:52:12,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427816199] [2019-11-07 04:52:12,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:12,611 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:12,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:12,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:52:12,611 INFO L87 Difference]: Start difference. First operand 5603 states and 7189 transitions. Second operand 4 states. [2019-11-07 04:52:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:13,075 INFO L93 Difference]: Finished difference Result 8729 states and 11567 transitions. [2019-11-07 04:52:13,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:13,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 202 [2019-11-07 04:52:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:13,110 INFO L225 Difference]: With dead ends: 8729 [2019-11-07 04:52:13,111 INFO L226 Difference]: Without dead ends: 5615 [2019-11-07 04:52:13,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 04:52:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5615 states. [2019-11-07 04:52:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5615 to 5571. [2019-11-07 04:52:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5571 states. [2019-11-07 04:52:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5571 states to 5571 states and 7069 transitions. [2019-11-07 04:52:13,560 INFO L78 Accepts]: Start accepts. Automaton has 5571 states and 7069 transitions. Word has length 202 [2019-11-07 04:52:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:13,561 INFO L462 AbstractCegarLoop]: Abstraction has 5571 states and 7069 transitions. [2019-11-07 04:52:13,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5571 states and 7069 transitions. [2019-11-07 04:52:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-11-07 04:52:13,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:13,586 INFO L410 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] [2019-11-07 04:52:13,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:13,793 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:13,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:13,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1077510136, now seen corresponding path program 1 times [2019-11-07 04:52:13,794 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:13,794 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420235110] [2019-11-07 04:52:13,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-07 04:52:13,951 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420235110] [2019-11-07 04:52:13,951 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331834277] [2019-11-07 04:52:13,951 INFO L94 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 [2019-11-07 04:52:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:14,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 04:52:14,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-07 04:52:14,382 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:14,755 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2019-11-07 04:52:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-07 04:52:15,067 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:52:15,068 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-11-07 04:52:15,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593697946] [2019-11-07 04:52:15,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:52:15,069 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:15,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:52:15,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:52:15,070 INFO L87 Difference]: Start difference. First operand 5571 states and 7069 transitions. Second operand 6 states. [2019-11-07 04:52:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:15,818 INFO L93 Difference]: Finished difference Result 9375 states and 11983 transitions. [2019-11-07 04:52:15,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:52:15,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 276 [2019-11-07 04:52:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:15,849 INFO L225 Difference]: With dead ends: 9375 [2019-11-07 04:52:15,849 INFO L226 Difference]: Without dead ends: 6283 [2019-11-07 04:52:15,864 INFO L630 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 [2019-11-07 04:52:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2019-11-07 04:52:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 6283. [2019-11-07 04:52:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6283 states. [2019-11-07 04:52:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 7749 transitions. [2019-11-07 04:52:16,262 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 7749 transitions. Word has length 276 [2019-11-07 04:52:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:16,263 INFO L462 AbstractCegarLoop]: Abstraction has 6283 states and 7749 transitions. [2019-11-07 04:52:16,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:52:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 7749 transitions. [2019-11-07 04:52:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-07 04:52:16,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:16,289 INFO L410 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] [2019-11-07 04:52:16,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:16,497 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:16,498 INFO L82 PathProgramCache]: Analyzing trace with hash 317482813, now seen corresponding path program 1 times [2019-11-07 04:52:16,498 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:16,498 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446965455] [2019-11-07 04:52:16,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-07 04:52:16,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446965455] [2019-11-07 04:52:16,630 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521040062] [2019-11-07 04:52:16,630 INFO L94 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 [2019-11-07 04:52:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:17,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:52:17,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-07 04:52:17,106 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-07 04:52:17,288 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:52:17,288 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-11-07 04:52:17,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392603955] [2019-11-07 04:52:17,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:52:17,289 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:52:17,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:52:17,290 INFO L87 Difference]: Start difference. First operand 6283 states and 7749 transitions. Second operand 3 states. [2019-11-07 04:52:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:17,607 INFO L93 Difference]: Finished difference Result 11495 states and 14534 transitions. [2019-11-07 04:52:17,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:52:17,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-11-07 04:52:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:17,645 INFO L225 Difference]: With dead ends: 11495 [2019-11-07 04:52:17,645 INFO L226 Difference]: Without dead ends: 8043 [2019-11-07 04:52:17,658 INFO L630 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 [2019-11-07 04:52:17,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8043 states. [2019-11-07 04:52:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8043 to 7043. [2019-11-07 04:52:18,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7043 states. [2019-11-07 04:52:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7043 states to 7043 states and 8835 transitions. [2019-11-07 04:52:18,575 INFO L78 Accepts]: Start accepts. Automaton has 7043 states and 8835 transitions. Word has length 202 [2019-11-07 04:52:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:18,575 INFO L462 AbstractCegarLoop]: Abstraction has 7043 states and 8835 transitions. [2019-11-07 04:52:18,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:52:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 7043 states and 8835 transitions. [2019-11-07 04:52:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-07 04:52:18,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:18,608 INFO L410 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] [2019-11-07 04:52:18,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:18,814 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:18,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1468298496, now seen corresponding path program 1 times [2019-11-07 04:52:18,815 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:18,815 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780859444] [2019-11-07 04:52:18,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-07 04:52:18,961 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780859444] [2019-11-07 04:52:18,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246019581] [2019-11-07 04:52:18,962 INFO L94 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 [2019-11-07 04:52:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:19,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:52:19,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-07 04:52:19,320 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-07 04:52:19,516 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:52:19,516 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-11-07 04:52:19,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846342993] [2019-11-07 04:52:19,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:52:19,517 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:52:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 04:52:19,517 INFO L87 Difference]: Start difference. First operand 7043 states and 8835 transitions. Second operand 4 states. [2019-11-07 04:52:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:19,906 INFO L93 Difference]: Finished difference Result 11844 states and 14831 transitions. [2019-11-07 04:52:19,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:52:19,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 202 [2019-11-07 04:52:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:19,937 INFO L225 Difference]: With dead ends: 11844 [2019-11-07 04:52:19,937 INFO L226 Difference]: Without dead ends: 8379 [2019-11-07 04:52:19,953 INFO L630 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 [2019-11-07 04:52:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8379 states. [2019-11-07 04:52:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8379 to 8379. [2019-11-07 04:52:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8379 states. [2019-11-07 04:52:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8379 states to 8379 states and 10155 transitions. [2019-11-07 04:52:20,466 INFO L78 Accepts]: Start accepts. Automaton has 8379 states and 10155 transitions. Word has length 202 [2019-11-07 04:52:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:20,466 INFO L462 AbstractCegarLoop]: Abstraction has 8379 states and 10155 transitions. [2019-11-07 04:52:20,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:52:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8379 states and 10155 transitions. [2019-11-07 04:52:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2019-11-07 04:52:20,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:20,481 INFO L410 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] [2019-11-07 04:52:20,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:20,685 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:20,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:20,687 INFO L82 PathProgramCache]: Analyzing trace with hash -622035404, now seen corresponding path program 1 times [2019-11-07 04:52:20,687 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:20,687 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939851922] [2019-11-07 04:52:20,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-07 04:52:20,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939851922] [2019-11-07 04:52:20,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859856926] [2019-11-07 04:52:20,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 04:52:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:21,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-07 04:52:21,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-07 04:52:21,462 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2019-11-07 04:52:21,806 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:52:21,806 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 4] total 12 [2019-11-07 04:52:21,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592689451] [2019-11-07 04:52:21,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:52:21,807 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:52:21,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:52:21,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:52:21,808 INFO L87 Difference]: Start difference. First operand 8379 states and 10155 transitions. Second operand 6 states. [2019-11-07 04:52:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:52:22,650 INFO L93 Difference]: Finished difference Result 13711 states and 16827 transitions. [2019-11-07 04:52:22,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:52:22,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 276 [2019-11-07 04:52:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:52:22,681 INFO L225 Difference]: With dead ends: 13711 [2019-11-07 04:52:22,681 INFO L226 Difference]: Without dead ends: 9067 [2019-11-07 04:52:22,696 INFO L630 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 [2019-11-07 04:52:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9067 states. [2019-11-07 04:52:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9067 to 9067. [2019-11-07 04:52:23,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9067 states. [2019-11-07 04:52:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9067 states to 9067 states and 10763 transitions. [2019-11-07 04:52:23,146 INFO L78 Accepts]: Start accepts. Automaton has 9067 states and 10763 transitions. Word has length 276 [2019-11-07 04:52:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:52:23,147 INFO L462 AbstractCegarLoop]: Abstraction has 9067 states and 10763 transitions. [2019-11-07 04:52:23,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:52:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 9067 states and 10763 transitions. [2019-11-07 04:52:23,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-11-07 04:52:23,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:52:23,160 INFO L410 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, 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] [2019-11-07 04:52:23,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:52:23,361 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:52:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:52:23,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1836045459, now seen corresponding path program 1 times [2019-11-07 04:52:23,362 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:52:23,362 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583939392] [2019-11-07 04:52:23,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:52:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-07 04:52:23,544 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583939392] [2019-11-07 04:52:23,545 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872141606] [2019-11-07 04:52:23,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 04:52:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:52:23,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-07 04:52:23,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:52:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 162 proven. 4 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-07 04:52:24,094 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:52:24,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:52:24,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:52:24,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:52:24,520 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:52:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2019-11-07 04:52:24,578 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653334849] [2019-11-07 04:52:24,604 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2019-11-07 04:52:24,604 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:52:24,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:52:24,617 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:52:24,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:52:24,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 82 for LOIs [2019-11-07 04:52:24,830 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 137 for LOIs [2019-11-07 04:52:25,194 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2019-11-07 04:52:25,358 INFO L197 IcfgInterpreter]: Interpreting procedure init_model with input of size 87 for LOIs [2019-11-07 04:52:25,361 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 148 for LOIs [2019-11-07 04:52:26,762 WARN L191 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 244 [2019-11-07 04:52:27,548 WARN L191 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 244 [2019-11-07 04:52:28,095 WARN L191 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 244 [2019-11-07 04:52:28,527 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 244 [2019-11-07 04:52:28,722 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2019-11-07 04:52:28,878 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 10