java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/token_ring.02.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:31:52,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:31:52,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:31:52,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:31:52,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:31:52,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:31:52,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:31:52,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:31:52,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:31:52,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:31:52,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:31:52,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:31:52,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:31:52,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:31:52,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:31:52,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:31:52,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:31:52,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:31:52,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:31:52,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:31:52,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:31:52,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:31:52,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:31:52,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:31:52,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:31:52,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:31:52,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:31:52,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:31:52,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:31:52,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:31:52,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:31:52,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:31:52,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:31:52,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:31:52,355 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:31:52,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:31:52,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:31:52,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:31:52,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:31:52,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:31:52,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:31:52,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:31:52,378 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:31:52,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:31:52,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:31:52,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:31:52,380 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:31:52,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:31:52,381 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:31:52,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:31:52,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:31:52,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:31:52,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:31:52,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:31:52,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:31:52,382 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:31:52,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:31:52,382 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:31:52,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:31:52,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:31:52,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:31:52,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:31:52,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:31:52,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:52,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:31:52,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:31:52,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:31:52,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:31:52,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:31:52,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:31:52,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:31:52,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:31:52,672 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:31:52,675 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:31:52,677 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:31:52,677 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:31:52,678 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-10-15 03:31:52,740 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886a5638f/d948ee846f884974a5e35da523e8ef5e/FLAGc685a4f25 [2019-10-15 03:31:53,192 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:31:53,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-10-15 03:31:53,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886a5638f/d948ee846f884974a5e35da523e8ef5e/FLAGc685a4f25 [2019-10-15 03:31:53,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886a5638f/d948ee846f884974a5e35da523e8ef5e [2019-10-15 03:31:53,606 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:31:53,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:31:53,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:53,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:31:53,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:31:53,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:53" (1/1) ... [2019-10-15 03:31:53,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc444e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:53, skipping insertion in model container [2019-10-15 03:31:53,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:53" (1/1) ... [2019-10-15 03:31:53,626 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:31:53,679 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:31:53,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:53,930 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:31:54,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:54,099 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:31:54,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54 WrapperNode [2019-10-15 03:31:54,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:54,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:31:54,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:31:54,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:31:54,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54" (1/1) ... [2019-10-15 03:31:54,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54" (1/1) ... [2019-10-15 03:31:54,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54" (1/1) ... [2019-10-15 03:31:54,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54" (1/1) ... [2019-10-15 03:31:54,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54" (1/1) ... [2019-10-15 03:31:54,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54" (1/1) ... [2019-10-15 03:31:54,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54" (1/1) ... [2019-10-15 03:31:54,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:31:54,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:31:54,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:31:54,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:31:54,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:31:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:31:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 03:31:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-10-15 03:31:54,198 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-10-15 03:31:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-10-15 03:31:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-10-15 03:31:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-10-15 03:31:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-10-15 03:31:54,199 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 03:31:54,200 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 03:31:54,200 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 03:31:54,200 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 03:31:54,201 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 03:31:54,201 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 03:31:54,202 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 03:31:54,204 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-10-15 03:31:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-10-15 03:31:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-10-15 03:31:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 03:31:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 03:31:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 03:31:54,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:31:54,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:31:54,206 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 03:31:54,207 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-10-15 03:31:54,207 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-10-15 03:31:54,208 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-10-15 03:31:54,208 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-10-15 03:31:54,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:31:54,208 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-10-15 03:31:54,208 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-10-15 03:31:54,208 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-10-15 03:31:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 03:31:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 03:31:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 03:31:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 03:31:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 03:31:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 03:31:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 03:31:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-10-15 03:31:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-10-15 03:31:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 03:31:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 03:31:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 03:31:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:31:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:31:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:31:55,133 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:31:55,134 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 03:31:55,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:55 BoogieIcfgContainer [2019-10-15 03:31:55,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:31:55,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:31:55,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:31:55,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:31:55,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:31:53" (1/3) ... [2019-10-15 03:31:55,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338dd10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:55, skipping insertion in model container [2019-10-15 03:31:55,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:54" (2/3) ... [2019-10-15 03:31:55,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@338dd10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:55, skipping insertion in model container [2019-10-15 03:31:55,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:55" (3/3) ... [2019-10-15 03:31:55,155 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-1.c [2019-10-15 03:31:55,169 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:31:55,178 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:31:55,190 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:31:55,225 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:31:55,225 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:31:55,225 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:31:55,225 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:31:55,226 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:31:55,226 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:31:55,227 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:31:55,227 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:31:55,254 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2019-10-15 03:31:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 03:31:55,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:55,265 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:55,267 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:55,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1639965672, now seen corresponding path program 1 times [2019-10-15 03:31:55,283 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:55,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144453018] [2019-10-15 03:31:55,284 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:55,284 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:55,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:55,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144453018] [2019-10-15 03:31:55,653 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:55,654 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:31:55,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996404643] [2019-10-15 03:31:55,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:55,660 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:55,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:55,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:55,678 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 4 states. [2019-10-15 03:31:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:56,079 INFO L93 Difference]: Finished difference Result 333 states and 452 transitions. [2019-10-15 03:31:56,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:56,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-10-15 03:31:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:56,098 INFO L225 Difference]: With dead ends: 333 [2019-10-15 03:31:56,099 INFO L226 Difference]: Without dead ends: 212 [2019-10-15 03:31:56,105 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:56,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-15 03:31:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2019-10-15 03:31:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-10-15 03:31:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 263 transitions. [2019-10-15 03:31:56,203 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 263 transitions. Word has length 63 [2019-10-15 03:31:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:56,204 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 263 transitions. [2019-10-15 03:31:56,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 263 transitions. [2019-10-15 03:31:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-15 03:31:56,211 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:56,212 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:56,212 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash 849498777, now seen corresponding path program 1 times [2019-10-15 03:31:56,213 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:56,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894912071] [2019-10-15 03:31:56,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:56,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:56,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 03:31:56,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894912071] [2019-10-15 03:31:56,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67987327] [2019-10-15 03:31:56,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:56,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:31:56,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 03:31:56,731 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:31:56,864 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:31:56,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 03:31:56,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195605652] [2019-10-15 03:31:56,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:56,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:56,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:31:56,867 INFO L87 Difference]: Start difference. First operand 211 states and 263 transitions. Second operand 4 states. [2019-10-15 03:31:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:56,974 INFO L93 Difference]: Finished difference Result 375 states and 473 transitions. [2019-10-15 03:31:56,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:56,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 106 [2019-10-15 03:31:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:56,983 INFO L225 Difference]: With dead ends: 375 [2019-10-15 03:31:56,984 INFO L226 Difference]: Without dead ends: 274 [2019-10-15 03:31:56,985 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:31:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-10-15 03:31:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 232. [2019-10-15 03:31:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-10-15 03:31:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2019-10-15 03:31:57,027 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 106 [2019-10-15 03:31:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:57,028 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2019-10-15 03:31:57,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2019-10-15 03:31:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 03:31:57,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:57,033 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:57,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:57,238 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash -226352789, now seen corresponding path program 1 times [2019-10-15 03:31:57,239 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:57,239 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145686396] [2019-10-15 03:31:57,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:57,240 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:57,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 03:31:57,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145686396] [2019-10-15 03:31:57,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600378231] [2019-10-15 03:31:57,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:57,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:31:57,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-15 03:31:57,627 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-15 03:31:57,793 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:31:57,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-15 03:31:57,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110530101] [2019-10-15 03:31:57,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:57,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:57,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:57,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:31:57,795 INFO L87 Difference]: Start difference. First operand 232 states and 295 transitions. Second operand 3 states. [2019-10-15 03:31:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:57,846 INFO L93 Difference]: Finished difference Result 654 states and 861 transitions. [2019-10-15 03:31:57,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:57,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-10-15 03:31:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:57,860 INFO L225 Difference]: With dead ends: 654 [2019-10-15 03:31:57,860 INFO L226 Difference]: Without dead ends: 438 [2019-10-15 03:31:57,863 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 273 SyntacticMatches, 8 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:31:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-10-15 03:31:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 432. [2019-10-15 03:31:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2019-10-15 03:31:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 551 transitions. [2019-10-15 03:31:57,946 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 551 transitions. Word has length 140 [2019-10-15 03:31:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:57,949 INFO L462 AbstractCegarLoop]: Abstraction has 432 states and 551 transitions. [2019-10-15 03:31:57,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 551 transitions. [2019-10-15 03:31:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-15 03:31:57,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:57,959 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:58,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:58,172 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:58,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1178185681, now seen corresponding path program 1 times [2019-10-15 03:31:58,172 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:58,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853075944] [2019-10-15 03:31:58,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:58,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:58,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-10-15 03:31:58,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853075944] [2019-10-15 03:31:58,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085994868] [2019-10-15 03:31:58,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:58,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:31:58,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 03:31:58,528 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 03:31:58,696 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:31:58,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 7 [2019-10-15 03:31:58,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636490474] [2019-10-15 03:31:58,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:58,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:58,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:58,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:31:58,699 INFO L87 Difference]: Start difference. First operand 432 states and 551 transitions. Second operand 4 states. [2019-10-15 03:31:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:58,988 INFO L93 Difference]: Finished difference Result 1243 states and 1691 transitions. [2019-10-15 03:31:58,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:58,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-10-15 03:31:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:58,998 INFO L225 Difference]: With dead ends: 1243 [2019-10-15 03:31:58,998 INFO L226 Difference]: Without dead ends: 827 [2019-10-15 03:31:59,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:31:59,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2019-10-15 03:31:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 814. [2019-10-15 03:31:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-15 03:31:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1024 transitions. [2019-10-15 03:31:59,076 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1024 transitions. Word has length 140 [2019-10-15 03:31:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:59,077 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1024 transitions. [2019-10-15 03:31:59,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1024 transitions. [2019-10-15 03:31:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 03:31:59,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:59,083 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:59,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:59,289 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:59,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1375141579, now seen corresponding path program 1 times [2019-10-15 03:31:59,290 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:59,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933617618] [2019-10-15 03:31:59,291 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:59,291 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:59,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:31:59,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933617618] [2019-10-15 03:31:59,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704520992] [2019-10-15 03:31:59,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:31:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:59,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:31:59,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-15 03:31:59,639 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-15 03:31:59,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:31:59,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 3] total 10 [2019-10-15 03:31:59,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183560457] [2019-10-15 03:31:59,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:59,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:59,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:59,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:31:59,816 INFO L87 Difference]: Start difference. First operand 814 states and 1024 transitions. Second operand 3 states. [2019-10-15 03:31:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:59,899 INFO L93 Difference]: Finished difference Result 1482 states and 1898 transitions. [2019-10-15 03:31:59,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:59,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-10-15 03:31:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:59,910 INFO L225 Difference]: With dead ends: 1482 [2019-10-15 03:31:59,911 INFO L226 Difference]: Without dead ends: 1070 [2019-10-15 03:31:59,914 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:31:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2019-10-15 03:31:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 895. [2019-10-15 03:31:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2019-10-15 03:31:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1134 transitions. [2019-10-15 03:31:59,992 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1134 transitions. Word has length 154 [2019-10-15 03:31:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:59,993 INFO L462 AbstractCegarLoop]: Abstraction has 895 states and 1134 transitions. [2019-10-15 03:31:59,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1134 transitions. [2019-10-15 03:32:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 03:32:00,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:00,001 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:00,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:00,205 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:00,207 INFO L82 PathProgramCache]: Analyzing trace with hash -881958040, now seen corresponding path program 1 times [2019-10-15 03:32:00,207 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:00,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133210612] [2019-10-15 03:32:00,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:00,208 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:00,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:32:00,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133210612] [2019-10-15 03:32:00,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124194195] [2019-10-15 03:32:00,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:00,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:32:00,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-15 03:32:00,571 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-15 03:32:00,765 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:32:00,765 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [8] total 10 [2019-10-15 03:32:00,765 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919974831] [2019-10-15 03:32:00,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:00,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:00,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:00,769 INFO L87 Difference]: Start difference. First operand 895 states and 1134 transitions. Second operand 4 states. [2019-10-15 03:32:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:01,044 INFO L93 Difference]: Finished difference Result 1546 states and 1950 transitions. [2019-10-15 03:32:01,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:01,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-15 03:32:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:01,057 INFO L225 Difference]: With dead ends: 1546 [2019-10-15 03:32:01,058 INFO L226 Difference]: Without dead ends: 1109 [2019-10-15 03:32:01,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 301 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:32:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2019-10-15 03:32:01,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1109. [2019-10-15 03:32:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2019-10-15 03:32:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1352 transitions. [2019-10-15 03:32:01,173 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1352 transitions. Word has length 154 [2019-10-15 03:32:01,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:01,177 INFO L462 AbstractCegarLoop]: Abstraction has 1109 states and 1352 transitions. [2019-10-15 03:32:01,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:01,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1352 transitions. [2019-10-15 03:32:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 03:32:01,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:01,186 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:01,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:01,391 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1931578956, now seen corresponding path program 2 times [2019-10-15 03:32:01,392 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:01,392 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793060546] [2019-10-15 03:32:01,392 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:01,392 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:01,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-15 03:32:01,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793060546] [2019-10-15 03:32:01,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623934509] [2019-10-15 03:32:01,456 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:01,676 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:32:01,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:32:01,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 60 conjunts are in the unsatisfiable core [2019-10-15 03:32:01,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-15 03:32:01,867 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:02,281 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-10-15 03:32:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:32:02,433 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:02,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 9] total 13 [2019-10-15 03:32:02,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454442417] [2019-10-15 03:32:02,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:02,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:02,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:32:02,436 INFO L87 Difference]: Start difference. First operand 1109 states and 1352 transitions. Second operand 4 states. [2019-10-15 03:32:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:02,701 INFO L93 Difference]: Finished difference Result 2040 states and 2512 transitions. [2019-10-15 03:32:02,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:32:02,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-10-15 03:32:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:02,710 INFO L225 Difference]: With dead ends: 2040 [2019-10-15 03:32:02,711 INFO L226 Difference]: Without dead ends: 1435 [2019-10-15 03:32:02,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-15 03:32:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2019-10-15 03:32:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1411. [2019-10-15 03:32:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2019-10-15 03:32:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1662 transitions. [2019-10-15 03:32:02,802 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1662 transitions. Word has length 154 [2019-10-15 03:32:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:02,803 INFO L462 AbstractCegarLoop]: Abstraction has 1411 states and 1662 transitions. [2019-10-15 03:32:02,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1662 transitions. [2019-10-15 03:32:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 03:32:02,809 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:02,809 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:03,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:03,015 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1334316470, now seen corresponding path program 1 times [2019-10-15 03:32:03,016 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:03,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707931754] [2019-10-15 03:32:03,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 03:32:03,090 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707931754] [2019-10-15 03:32:03,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182900142] [2019-10-15 03:32:03,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:03,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:32:03,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 03:32:03,327 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 27 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 03:32:03,505 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:03,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2019-10-15 03:32:03,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455678825] [2019-10-15 03:32:03,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:32:03,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:32:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:03,507 INFO L87 Difference]: Start difference. First operand 1411 states and 1662 transitions. Second operand 3 states. [2019-10-15 03:32:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:03,619 INFO L93 Difference]: Finished difference Result 2166 states and 2638 transitions. [2019-10-15 03:32:03,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:32:03,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-10-15 03:32:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:03,630 INFO L225 Difference]: With dead ends: 2166 [2019-10-15 03:32:03,630 INFO L226 Difference]: Without dead ends: 1404 [2019-10-15 03:32:03,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2019-10-15 03:32:03,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1391. [2019-10-15 03:32:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2019-10-15 03:32:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1612 transitions. [2019-10-15 03:32:03,735 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1612 transitions. Word has length 154 [2019-10-15 03:32:03,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:03,736 INFO L462 AbstractCegarLoop]: Abstraction has 1391 states and 1612 transitions. [2019-10-15 03:32:03,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:32:03,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1612 transitions. [2019-10-15 03:32:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 03:32:03,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:03,742 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:03,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:03,949 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1587365183, now seen corresponding path program 1 times [2019-10-15 03:32:03,950 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:03,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561023809] [2019-10-15 03:32:03,951 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,951 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:03,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 03:32:04,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561023809] [2019-10-15 03:32:04,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014199534] [2019-10-15 03:32:04,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:04,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:32:04,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 03:32:04,277 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 03:32:04,412 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:32:04,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2019-10-15 03:32:04,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892835535] [2019-10-15 03:32:04,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:32:04,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:32:04,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:32:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:32:04,414 INFO L87 Difference]: Start difference. First operand 1391 states and 1612 transitions. Second operand 4 states. [2019-10-15 03:32:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:32:04,862 INFO L93 Difference]: Finished difference Result 3416 states and 4151 transitions. [2019-10-15 03:32:04,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:32:04,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2019-10-15 03:32:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:32:04,880 INFO L225 Difference]: With dead ends: 3416 [2019-10-15 03:32:04,881 INFO L226 Difference]: Without dead ends: 2042 [2019-10-15 03:32:04,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:32:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2019-10-15 03:32:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1696. [2019-10-15 03:32:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1696 states. [2019-10-15 03:32:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2037 transitions. [2019-10-15 03:32:05,039 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2037 transitions. Word has length 155 [2019-10-15 03:32:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:32:05,040 INFO L462 AbstractCegarLoop]: Abstraction has 1696 states and 2037 transitions. [2019-10-15 03:32:05,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:32:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2037 transitions. [2019-10-15 03:32:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-15 03:32:05,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:32:05,048 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:32:05,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:32:05,261 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:32:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:32:05,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1779210507, now seen corresponding path program 1 times [2019-10-15 03:32:05,262 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:32:05,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233237394] [2019-10-15 03:32:05,262 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:05,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:32:05,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:32:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-10-15 03:32:05,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233237394] [2019-10-15 03:32:05,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442438239] [2019-10-15 03:32:05,398 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 [2019-10-15 03:32:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:32:05,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-15 03:32:05,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:32:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 117 proven. 4 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-15 03:32:05,753 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:32:06,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:06,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:06,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:06,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:32:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-10-15 03:32:06,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880111175] [2019-10-15 03:32:06,173 INFO L162 IcfgInterpreter]: Started Sifa with 102 locations of interest [2019-10-15 03:32:06,173 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:32:06,181 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:32:06,190 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:32:06,190 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:32:06,417 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 03:32:06,458 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 81 for LOIs [2019-10-15 03:32:06,887 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 51 for LOIs [2019-10-15 03:32:06,961 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 96 for LOIs [2019-10-15 03:32:09,408 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-15 03:32:09,426 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-15 03:32:10,372 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-10-15 03:32:10,383 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6