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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:28:11,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:28:11,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:28:11,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:28:11,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:28:11,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:28:11,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:28:11,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:28:11,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:28:11,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:28:11,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:28:11,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:28:11,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:28:11,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:28:11,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:28:11,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:28:11,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:28:11,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:28:11,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:28:11,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:28:11,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:28:11,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:28:11,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:28:11,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:28:11,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:28:11,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:28:11,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:28:11,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:28:11,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:28:11,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:28:11,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:28:11,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:28:11,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:28:11,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:28:11,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:28:11,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:28:11,185 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 01:28:11,200 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:28:11,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:28:11,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:28:11,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:28:11,202 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:28:11,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:28:11,203 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:28:11,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:28:11,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:28:11,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:28:11,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:28:11,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:28:11,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:28:11,204 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:28:11,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:28:11,205 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:28:11,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:28:11,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:28:11,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:28:11,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:28:11,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:28:11,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:28:11,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:28:11,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:28:11,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:28:11,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:28:11,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:28:11,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:28:11,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:28:11,528 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:28:11,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:28:11,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:28:11,547 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:28:11,548 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:28:11,548 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_2.cil-1.c [2019-10-15 01:28:11,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386f8b40a/8b841a32450543ffb5eec7c4ff101cff/FLAG942ac0af1 [2019-10-15 01:28:12,081 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:28:12,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/pc_sfifo_2.cil-1.c [2019-10-15 01:28:12,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386f8b40a/8b841a32450543ffb5eec7c4ff101cff/FLAG942ac0af1 [2019-10-15 01:28:12,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386f8b40a/8b841a32450543ffb5eec7c4ff101cff [2019-10-15 01:28:12,435 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:28:12,436 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:28:12,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:28:12,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:28:12,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:28:12,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:12,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f79b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:12, skipping insertion in model container [2019-10-15 01:28:12,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:28:12" (1/1) ... [2019-10-15 01:28:12,453 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:28:12,503 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:28:12,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:28:12,836 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:28:12,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:28:13,068 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:28:13,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13 WrapperNode [2019-10-15 01:28:13,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:28:13,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:28:13,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:28:13,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:28:13,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13" (1/1) ... [2019-10-15 01:28:13,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13" (1/1) ... [2019-10-15 01:28:13,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13" (1/1) ... [2019-10-15 01:28:13,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13" (1/1) ... [2019-10-15 01:28:13,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13" (1/1) ... [2019-10-15 01:28:13,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13" (1/1) ... [2019-10-15 01:28:13,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13" (1/1) ... [2019-10-15 01:28:13,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:28:13,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:28:13,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:28:13,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:28:13,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13" (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 01:28:13,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:28:13,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:28:13,207 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-15 01:28:13,207 INFO L138 BoogieDeclarations]: Found implementation of procedure update_fifo_q [2019-10-15 01:28:13,208 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2019-10-15 01:28:13,208 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2019-10-15 01:28:13,208 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2019-10-15 01:28:13,208 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2019-10-15 01:28:13,208 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2019-10-15 01:28:13,208 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-10-15 01:28:13,209 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-15 01:28:13,209 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-15 01:28:13,209 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-10-15 01:28:13,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-10-15 01:28:13,209 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-10-15 01:28:13,209 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-15 01:28:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-15 01:28:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-15 01:28:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-15 01:28:13,210 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:28:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:28:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:28:13,210 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-15 01:28:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure update_fifo_q [2019-10-15 01:28:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2019-10-15 01:28:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2019-10-15 01:28:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2019-10-15 01:28:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2019-10-15 01:28:13,211 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2019-10-15 01:28:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-10-15 01:28:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-15 01:28:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-15 01:28:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-10-15 01:28:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-10-15 01:28:13,212 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-10-15 01:28:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-15 01:28:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-15 01:28:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-15 01:28:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-15 01:28:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:28:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:28:13,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:28:13,754 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:28:13,754 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 01:28:13,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:28:13 BoogieIcfgContainer [2019-10-15 01:28:13,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:28:13,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:28:13,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:28:13,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:28:13,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:28:12" (1/3) ... [2019-10-15 01:28:13,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3f5a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:28:13, skipping insertion in model container [2019-10-15 01:28:13,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:28:13" (2/3) ... [2019-10-15 01:28:13,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3f5a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:28:13, skipping insertion in model container [2019-10-15 01:28:13,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:28:13" (3/3) ... [2019-10-15 01:28:13,765 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1.c [2019-10-15 01:28:13,776 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:28:13,786 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:28:13,798 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:28:13,827 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:28:13,827 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:28:13,827 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:28:13,828 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:28:13,828 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:28:13,828 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:28:13,828 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:28:13,829 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:28:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states. [2019-10-15 01:28:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:28:13,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:13,869 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:13,871 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash 4101629, now seen corresponding path program 1 times [2019-10-15 01:28:13,889 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:13,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246940687] [2019-10-15 01:28:13,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:13,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:13,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:14,277 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 01:28:14,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246940687] [2019-10-15 01:28:14,280 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:14,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:28:14,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413164757] [2019-10-15 01:28:14,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:28:14,290 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:14,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:28:14,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:28:14,308 INFO L87 Difference]: Start difference. First operand 137 states. Second operand 5 states. [2019-10-15 01:28:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:15,147 INFO L93 Difference]: Finished difference Result 379 states and 545 transitions. [2019-10-15 01:28:15,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:28:15,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2019-10-15 01:28:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:15,184 INFO L225 Difference]: With dead ends: 379 [2019-10-15 01:28:15,185 INFO L226 Difference]: Without dead ends: 252 [2019-10-15 01:28:15,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:28:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-10-15 01:28:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 233. [2019-10-15 01:28:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-10-15 01:28:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 305 transitions. [2019-10-15 01:28:15,343 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 305 transitions. Word has length 78 [2019-10-15 01:28:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:15,344 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 305 transitions. [2019-10-15 01:28:15,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:28:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 305 transitions. [2019-10-15 01:28:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:28:15,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:15,349 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:15,350 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:15,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:15,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1430979773, now seen corresponding path program 1 times [2019-10-15 01:28:15,350 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:15,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599320806] [2019-10-15 01:28:15,351 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:15,351 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:15,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:15,468 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 01:28:15,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599320806] [2019-10-15 01:28:15,469 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:15,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:28:15,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115929072] [2019-10-15 01:28:15,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:28:15,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:15,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:28:15,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:28:15,474 INFO L87 Difference]: Start difference. First operand 233 states and 305 transitions. Second operand 6 states. [2019-10-15 01:28:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:16,377 INFO L93 Difference]: Finished difference Result 628 states and 843 transitions. [2019-10-15 01:28:16,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:28:16,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-10-15 01:28:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:16,384 INFO L225 Difference]: With dead ends: 628 [2019-10-15 01:28:16,384 INFO L226 Difference]: Without dead ends: 422 [2019-10-15 01:28:16,386 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:28:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2019-10-15 01:28:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 359. [2019-10-15 01:28:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-10-15 01:28:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 475 transitions. [2019-10-15 01:28:16,444 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 475 transitions. Word has length 78 [2019-10-15 01:28:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:16,444 INFO L462 AbstractCegarLoop]: Abstraction has 359 states and 475 transitions. [2019-10-15 01:28:16,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:28:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 475 transitions. [2019-10-15 01:28:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:28:16,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:16,449 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:16,450 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:16,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:16,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1477202113, now seen corresponding path program 1 times [2019-10-15 01:28:16,450 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:16,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477978088] [2019-10-15 01:28:16,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:16,573 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 01:28:16,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477978088] [2019-10-15 01:28:16,574 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:16,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:28:16,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493931621] [2019-10-15 01:28:16,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:28:16,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:28:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:28:16,576 INFO L87 Difference]: Start difference. First operand 359 states and 475 transitions. Second operand 6 states. [2019-10-15 01:28:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:16,646 INFO L93 Difference]: Finished difference Result 685 states and 908 transitions. [2019-10-15 01:28:16,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:28:16,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-10-15 01:28:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:16,650 INFO L225 Difference]: With dead ends: 685 [2019-10-15 01:28:16,650 INFO L226 Difference]: Without dead ends: 369 [2019-10-15 01:28:16,652 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:28:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2019-10-15 01:28:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 364. [2019-10-15 01:28:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2019-10-15 01:28:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 478 transitions. [2019-10-15 01:28:16,688 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 478 transitions. Word has length 78 [2019-10-15 01:28:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:16,689 INFO L462 AbstractCegarLoop]: Abstraction has 364 states and 478 transitions. [2019-10-15 01:28:16,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:28:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 478 transitions. [2019-10-15 01:28:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:28:16,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:16,696 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:16,697 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1229055619, now seen corresponding path program 1 times [2019-10-15 01:28:16,697 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:16,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232382092] [2019-10-15 01:28:16,698 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:16,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:16,836 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 01:28:16,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232382092] [2019-10-15 01:28:16,837 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:16,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:28:16,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838175190] [2019-10-15 01:28:16,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:28:16,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:16,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:28:16,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:28:16,839 INFO L87 Difference]: Start difference. First operand 364 states and 478 transitions. Second operand 4 states. [2019-10-15 01:28:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:17,083 INFO L93 Difference]: Finished difference Result 991 states and 1319 transitions. [2019-10-15 01:28:17,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:28:17,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2019-10-15 01:28:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:17,094 INFO L225 Difference]: With dead ends: 991 [2019-10-15 01:28:17,094 INFO L226 Difference]: Without dead ends: 670 [2019-10-15 01:28:17,097 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 01:28:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2019-10-15 01:28:17,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 651. [2019-10-15 01:28:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2019-10-15 01:28:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 834 transitions. [2019-10-15 01:28:17,177 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 834 transitions. Word has length 78 [2019-10-15 01:28:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:17,180 INFO L462 AbstractCegarLoop]: Abstraction has 651 states and 834 transitions. [2019-10-15 01:28:17,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:28:17,180 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 834 transitions. [2019-10-15 01:28:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:28:17,183 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:17,184 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:17,185 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash 650743635, now seen corresponding path program 1 times [2019-10-15 01:28:17,185 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:17,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146130513] [2019-10-15 01:28:17,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:17,186 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:17,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:17,298 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 01:28:17,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146130513] [2019-10-15 01:28:17,299 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:17,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:28:17,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331175926] [2019-10-15 01:28:17,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:28:17,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:17,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:28:17,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:28:17,301 INFO L87 Difference]: Start difference. First operand 651 states and 834 transitions. Second operand 6 states. [2019-10-15 01:28:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:17,367 INFO L93 Difference]: Finished difference Result 1280 states and 1639 transitions. [2019-10-15 01:28:17,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:28:17,368 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-10-15 01:28:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:17,373 INFO L225 Difference]: With dead ends: 1280 [2019-10-15 01:28:17,373 INFO L226 Difference]: Without dead ends: 672 [2019-10-15 01:28:17,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:28:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2019-10-15 01:28:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 666. [2019-10-15 01:28:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 666 states. [2019-10-15 01:28:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 846 transitions. [2019-10-15 01:28:17,421 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 846 transitions. Word has length 78 [2019-10-15 01:28:17,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:17,421 INFO L462 AbstractCegarLoop]: Abstraction has 666 states and 846 transitions. [2019-10-15 01:28:17,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:28:17,422 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 846 transitions. [2019-10-15 01:28:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:28:17,424 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:17,424 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:17,424 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash 578357077, now seen corresponding path program 1 times [2019-10-15 01:28:17,425 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:17,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600229368] [2019-10-15 01:28:17,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:17,426 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:17,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:17,497 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 01:28:17,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600229368] [2019-10-15 01:28:17,497 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:17,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:28:17,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328075420] [2019-10-15 01:28:17,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:28:17,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:17,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:28:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:28:17,499 INFO L87 Difference]: Start difference. First operand 666 states and 846 transitions. Second operand 6 states. [2019-10-15 01:28:18,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:18,260 INFO L93 Difference]: Finished difference Result 1359 states and 1714 transitions. [2019-10-15 01:28:18,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:28:18,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-10-15 01:28:18,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:18,267 INFO L225 Difference]: With dead ends: 1359 [2019-10-15 01:28:18,268 INFO L226 Difference]: Without dead ends: 831 [2019-10-15 01:28:18,270 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:28:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2019-10-15 01:28:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 682. [2019-10-15 01:28:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 01:28:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 855 transitions. [2019-10-15 01:28:18,322 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 855 transitions. Word has length 78 [2019-10-15 01:28:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:18,323 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 855 transitions. [2019-10-15 01:28:18,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:28:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 855 transitions. [2019-10-15 01:28:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:28:18,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:18,325 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:18,326 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash 68883987, now seen corresponding path program 1 times [2019-10-15 01:28:18,327 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:18,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612166609] [2019-10-15 01:28:18,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:18,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:18,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:18,378 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 01:28:18,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612166609] [2019-10-15 01:28:18,379 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:18,379 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:28:18,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721629063] [2019-10-15 01:28:18,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:28:18,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:18,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:28:18,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:28:18,381 INFO L87 Difference]: Start difference. First operand 682 states and 855 transitions. Second operand 3 states. [2019-10-15 01:28:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:18,477 INFO L93 Difference]: Finished difference Result 1887 states and 2417 transitions. [2019-10-15 01:28:18,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:28:18,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2019-10-15 01:28:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:18,489 INFO L225 Difference]: With dead ends: 1887 [2019-10-15 01:28:18,490 INFO L226 Difference]: Without dead ends: 1276 [2019-10-15 01:28:18,494 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:28:18,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2019-10-15 01:28:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1272. [2019-10-15 01:28:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2019-10-15 01:28:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1606 transitions. [2019-10-15 01:28:18,641 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1606 transitions. Word has length 78 [2019-10-15 01:28:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:18,641 INFO L462 AbstractCegarLoop]: Abstraction has 1272 states and 1606 transitions. [2019-10-15 01:28:18,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:28:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1606 transitions. [2019-10-15 01:28:18,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-15 01:28:18,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:18,645 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:18,645 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash 173246819, now seen corresponding path program 1 times [2019-10-15 01:28:18,646 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:18,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053399297] [2019-10-15 01:28:18,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:18,646 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:18,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:18,745 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 01:28:18,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053399297] [2019-10-15 01:28:18,746 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:18,747 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:28:18,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104988173] [2019-10-15 01:28:18,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:28:18,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:18,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:28:18,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:28:18,749 INFO L87 Difference]: Start difference. First operand 1272 states and 1606 transitions. Second operand 5 states. [2019-10-15 01:28:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:18,922 INFO L93 Difference]: Finished difference Result 3564 states and 4733 transitions. [2019-10-15 01:28:18,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:28:18,923 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2019-10-15 01:28:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:18,941 INFO L225 Difference]: With dead ends: 3564 [2019-10-15 01:28:18,941 INFO L226 Difference]: Without dead ends: 2309 [2019-10-15 01:28:18,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:28:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-10-15 01:28:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2216. [2019-10-15 01:28:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2216 states. [2019-10-15 01:28:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 2839 transitions. [2019-10-15 01:28:19,112 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 2839 transitions. Word has length 79 [2019-10-15 01:28:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:19,112 INFO L462 AbstractCegarLoop]: Abstraction has 2216 states and 2839 transitions. [2019-10-15 01:28:19,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:28:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 2839 transitions. [2019-10-15 01:28:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-15 01:28:19,116 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:19,116 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:28:19,116 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:19,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1970791480, now seen corresponding path program 1 times [2019-10-15 01:28:19,117 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:19,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20305707] [2019-10-15 01:28:19,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:19,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:19,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:19,189 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 01:28:19,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20305707] [2019-10-15 01:28:19,193 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:19,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:28:19,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806839760] [2019-10-15 01:28:19,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:28:19,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:19,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:28:19,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:28:19,201 INFO L87 Difference]: Start difference. First operand 2216 states and 2839 transitions. Second operand 5 states. [2019-10-15 01:28:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:20,081 INFO L93 Difference]: Finished difference Result 6956 states and 9741 transitions. [2019-10-15 01:28:20,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:28:20,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2019-10-15 01:28:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:20,133 INFO L225 Difference]: With dead ends: 6956 [2019-10-15 01:28:20,133 INFO L226 Difference]: Without dead ends: 4830 [2019-10-15 01:28:20,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:28:20,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2019-10-15 01:28:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 4685. [2019-10-15 01:28:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4685 states. [2019-10-15 01:28:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6275 transitions. [2019-10-15 01:28:20,637 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6275 transitions. Word has length 87 [2019-10-15 01:28:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:20,637 INFO L462 AbstractCegarLoop]: Abstraction has 4685 states and 6275 transitions. [2019-10-15 01:28:20,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:28:20,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6275 transitions. [2019-10-15 01:28:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 01:28:20,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:20,642 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:20,642 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1829324777, now seen corresponding path program 1 times [2019-10-15 01:28:20,643 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:20,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537808236] [2019-10-15 01:28:20,643 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:20,643 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:20,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:28:20,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537808236] [2019-10-15 01:28:20,697 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:20,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:28:20,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42087733] [2019-10-15 01:28:20,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:28:20,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:20,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:28:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:28:20,699 INFO L87 Difference]: Start difference. First operand 4685 states and 6275 transitions. Second operand 4 states. [2019-10-15 01:28:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:21,131 INFO L93 Difference]: Finished difference Result 6313 states and 8477 transitions. [2019-10-15 01:28:21,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:28:21,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-15 01:28:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:21,184 INFO L225 Difference]: With dead ends: 6313 [2019-10-15 01:28:21,184 INFO L226 Difference]: Without dead ends: 6310 [2019-10-15 01:28:21,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:28:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2019-10-15 01:28:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 6141. [2019-10-15 01:28:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6141 states. [2019-10-15 01:28:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6141 states to 6141 states and 8233 transitions. [2019-10-15 01:28:21,700 INFO L78 Accepts]: Start accepts. Automaton has 6141 states and 8233 transitions. Word has length 88 [2019-10-15 01:28:21,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:21,701 INFO L462 AbstractCegarLoop]: Abstraction has 6141 states and 8233 transitions. [2019-10-15 01:28:21,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:28:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 6141 states and 8233 transitions. [2019-10-15 01:28:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-15 01:28:21,704 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:21,704 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:28:21,705 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:21,705 INFO L82 PathProgramCache]: Analyzing trace with hash -874813360, now seen corresponding path program 1 times [2019-10-15 01:28:21,706 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:21,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605054617] [2019-10-15 01:28:21,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:21,706 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:21,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:28:21,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605054617] [2019-10-15 01:28:21,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326274600] [2019-10-15 01:28:21,833 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 01:28:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:21,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-15 01:28:22,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:28:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:28:22,164 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:28:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:28:22,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [35589901] [2019-10-15 01:28:22,337 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 90 [2019-10-15 01:28:22,399 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:28:22,399 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:28:22,689 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 01:28:22,692 INFO L272 AbstractInterpreter]: Visited 86 different actions 89 times. Merged at 2 different actions 2 times. Never widened. Performed 392 root evaluator evaluations with a maximum evaluation depth of 4. Performed 392 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 40 variables. [2019-10-15 01:28:22,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:22,697 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 01:28:22,857 INFO L227 lantSequenceWeakener]: Weakened 85 states. On average, predicates are now at 78.23% of their original sizes. [2019-10-15 01:28:22,858 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 01:28:23,403 INFO L553 sIntCurrentIteration]: We unified 88 AI predicates to 88 [2019-10-15 01:28:23,403 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 01:28:23,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:28:23,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [6, 7, 6] total 44 [2019-10-15 01:28:23,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708572613] [2019-10-15 01:28:23,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-15 01:28:23,406 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:23,406 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 01:28:23,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-15 01:28:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:28:23,407 INFO L87 Difference]: Start difference. First operand 6141 states and 8233 transitions. Second operand 33 states. [2019-10-15 01:28:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:35,171 INFO L93 Difference]: Finished difference Result 17739 states and 24326 transitions. [2019-10-15 01:28:35,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-15 01:28:35,171 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 89 [2019-10-15 01:28:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:35,261 INFO L225 Difference]: With dead ends: 17739 [2019-10-15 01:28:35,261 INFO L226 Difference]: Without dead ends: 11617 [2019-10-15 01:28:35,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 01:28:35,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11617 states. [2019-10-15 01:28:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11617 to 10667. [2019-10-15 01:28:36,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10667 states. [2019-10-15 01:28:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10667 states to 10667 states and 14383 transitions. [2019-10-15 01:28:36,338 INFO L78 Accepts]: Start accepts. Automaton has 10667 states and 14383 transitions. Word has length 89 [2019-10-15 01:28:36,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:36,339 INFO L462 AbstractCegarLoop]: Abstraction has 10667 states and 14383 transitions. [2019-10-15 01:28:36,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-15 01:28:36,339 INFO L276 IsEmpty]: Start isEmpty. Operand 10667 states and 14383 transitions. [2019-10-15 01:28:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-15 01:28:36,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:36,342 INFO L380 BasicCegarLoop]: trace histogram [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, 1] [2019-10-15 01:28:36,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:36,548 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash -851936585, now seen corresponding path program 1 times [2019-10-15 01:28:36,549 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:36,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827361499] [2019-10-15 01:28:36,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:36,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:36,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:28:36,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827361499] [2019-10-15 01:28:36,643 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:28:36,643 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:28:36,644 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312073755] [2019-10-15 01:28:36,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:28:36,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:36,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:28:36,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:28:36,646 INFO L87 Difference]: Start difference. First operand 10667 states and 14383 transitions. Second operand 7 states. [2019-10-15 01:28:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:39,283 INFO L93 Difference]: Finished difference Result 33769 states and 50119 transitions. [2019-10-15 01:28:39,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:28:39,284 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2019-10-15 01:28:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:39,432 INFO L225 Difference]: With dead ends: 33769 [2019-10-15 01:28:39,432 INFO L226 Difference]: Without dead ends: 21075 [2019-10-15 01:28:39,560 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-10-15 01:28:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21075 states. [2019-10-15 01:28:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21075 to 19665. [2019-10-15 01:28:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19665 states. [2019-10-15 01:28:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19665 states to 19665 states and 25847 transitions. [2019-10-15 01:28:41,048 INFO L78 Accepts]: Start accepts. Automaton has 19665 states and 25847 transitions. Word has length 100 [2019-10-15 01:28:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:41,049 INFO L462 AbstractCegarLoop]: Abstraction has 19665 states and 25847 transitions. [2019-10-15 01:28:41,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:28:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 19665 states and 25847 transitions. [2019-10-15 01:28:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 01:28:41,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:41,052 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:28:41,052 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:41,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1692518472, now seen corresponding path program 1 times [2019-10-15 01:28:41,053 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:41,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837573862] [2019-10-15 01:28:41,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:41,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:41,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:28:41,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837573862] [2019-10-15 01:28:41,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502450625] [2019-10-15 01:28:41,139 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 01:28:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:28:41,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:28:41,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:28:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 01:28:41,451 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:28:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:28:41,530 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:28:41,530 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 4] total 11 [2019-10-15 01:28:41,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475529065] [2019-10-15 01:28:41,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:28:41,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:28:41,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:28:41,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:28:41,531 INFO L87 Difference]: Start difference. First operand 19665 states and 25847 transitions. Second operand 3 states. [2019-10-15 01:28:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:28:41,922 INFO L93 Difference]: Finished difference Result 31382 states and 41424 transitions. [2019-10-15 01:28:41,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:28:41,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-10-15 01:28:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:28:41,977 INFO L225 Difference]: With dead ends: 31382 [2019-10-15 01:28:41,977 INFO L226 Difference]: Without dead ends: 11725 [2019-10-15 01:28:42,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:28:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11725 states. [2019-10-15 01:28:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11725 to 9857. [2019-10-15 01:28:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9857 states. [2019-10-15 01:28:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 11871 transitions. [2019-10-15 01:28:42,886 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 11871 transitions. Word has length 110 [2019-10-15 01:28:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:28:42,887 INFO L462 AbstractCegarLoop]: Abstraction has 9857 states and 11871 transitions. [2019-10-15 01:28:42,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:28:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 11871 transitions. [2019-10-15 01:28:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-15 01:28:42,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:28:42,895 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 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 01:28:43,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:28:43,101 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:28:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:28:43,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1329668345, now seen corresponding path program 1 times [2019-10-15 01:28:43,101 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:28:43,101 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485229473] [2019-10-15 01:28:43,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:43,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:28:43,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:28:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat