/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:16:29,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:16:29,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:16:29,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:16:29,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:16:29,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:16:29,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:16:29,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:16:29,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:16:29,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:16:29,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:16:29,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:16:29,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:16:29,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:16:29,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:16:29,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:16:29,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:16:29,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:16:29,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:16:29,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:16:29,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:16:29,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:16:29,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:16:29,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:16:29,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:16:29,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:16:29,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:16:29,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:16:29,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:16:29,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:16:29,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:16:29,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:16:29,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:16:29,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:16:29,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:16:29,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:16:29,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:16:29,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:16:29,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:16:29,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:16:29,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:16:29,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 14:16:29,156 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:16:29,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:16:29,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:16:29,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:16:29,158 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:16:29,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:16:29,159 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:16:29,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:16:29,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:16:29,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:16:29,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:16:29,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:16:29,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:16:29,160 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:16:29,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:16:29,160 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:16:29,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:16:29,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:16:29,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:16:29,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:16:29,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:16:29,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:16:29,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:16:29,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:16:29,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:16:29,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:16:29,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:16:29,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:16:29,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:16:29,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> log-additional-information=true; [2020-08-21 14:16:29,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:16:29,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:16:29,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:16:29,463 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:16:29,465 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:16:29,467 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2020-08-21 14:16:29,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bda1f73ad/d3d9ef7b34764a96a80ab75cbf696585/FLAGd4dafc30a [2020-08-21 14:16:30,066 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:16:30,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.01.cil-1.c [2020-08-21 14:16:30,084 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bda1f73ad/d3d9ef7b34764a96a80ab75cbf696585/FLAGd4dafc30a [2020-08-21 14:16:30,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bda1f73ad/d3d9ef7b34764a96a80ab75cbf696585 [2020-08-21 14:16:30,434 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:16:30,436 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:16:30,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:16:30,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:16:30,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:16:30,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:16:30" (1/1) ... [2020-08-21 14:16:30,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87e4b2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30, skipping insertion in model container [2020-08-21 14:16:30,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:16:30" (1/1) ... [2020-08-21 14:16:30,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:16:30,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:16:30,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:16:30,697 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:16:30,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:16:30,875 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:16:30,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30 WrapperNode [2020-08-21 14:16:30,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:16:30,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:16:30,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:16:30,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:16:30,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30" (1/1) ... [2020-08-21 14:16:30,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30" (1/1) ... [2020-08-21 14:16:30,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30" (1/1) ... [2020-08-21 14:16:30,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30" (1/1) ... [2020-08-21 14:16:30,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30" (1/1) ... [2020-08-21 14:16:30,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30" (1/1) ... [2020-08-21 14:16:30,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30" (1/1) ... [2020-08-21 14:16:30,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:16:30,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:16:30,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:16:30,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:16:30,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 14:16:30,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:16:30,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:16:30,976 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 14:16:30,976 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-21 14:16:30,976 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-21 14:16:30,977 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-21 14:16:30,977 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-21 14:16:30,978 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-21 14:16:30,978 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 14:16:30,979 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 14:16:30,979 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 14:16:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-21 14:16:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-21 14:16:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-21 14:16:30,980 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-21 14:16:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-21 14:16:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-21 14:16:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 14:16:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 14:16:30,981 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 14:16:30,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:16:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:16:30,982 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 14:16:30,983 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-21 14:16:30,984 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-21 14:16:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-21 14:16:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 14:16:30,985 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-21 14:16:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-21 14:16:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-21 14:16:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 14:16:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 14:16:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 14:16:30,986 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-21 14:16:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-21 14:16:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-21 14:16:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-21 14:16:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-21 14:16:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 14:16:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 14:16:30,987 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 14:16:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:16:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:16:30,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:16:31,458 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:16:31,459 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 14:16:31,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:16:31 BoogieIcfgContainer [2020-08-21 14:16:31,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:16:31,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:16:31,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:16:31,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:16:31,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:16:30" (1/3) ... [2020-08-21 14:16:31,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b44fad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:16:31, skipping insertion in model container [2020-08-21 14:16:31,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:16:30" (2/3) ... [2020-08-21 14:16:31,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b44fad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:16:31, skipping insertion in model container [2020-08-21 14:16:31,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:16:31" (3/3) ... [2020-08-21 14:16:31,475 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.01.cil-1.c [2020-08-21 14:16:31,486 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:16:31,493 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:16:31,507 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:16:31,534 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:16:31,534 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:16:31,534 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:16:31,534 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:16:31,535 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:16:31,535 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:16:31,535 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:16:31,535 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:16:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states. [2020-08-21 14:16:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 14:16:31,569 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:31,571 INFO L422 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] [2020-08-21 14:16:31,571 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash 205618956, now seen corresponding path program 1 times [2020-08-21 14:16:31,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:31,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164291027] [2020-08-21 14:16:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:31,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:31,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:31,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:32,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164291027] [2020-08-21 14:16:32,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:32,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:16:32,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438431121] [2020-08-21 14:16:32,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:16:32,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:32,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:16:32,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:32,224 INFO L87 Difference]: Start difference. First operand 144 states. Second operand 9 states. [2020-08-21 14:16:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:34,539 INFO L93 Difference]: Finished difference Result 501 states and 755 transitions. [2020-08-21 14:16:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:16:34,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-08-21 14:16:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:34,569 INFO L225 Difference]: With dead ends: 501 [2020-08-21 14:16:34,569 INFO L226 Difference]: Without dead ends: 357 [2020-08-21 14:16:34,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:16:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-21 14:16:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 244. [2020-08-21 14:16:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-21 14:16:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 323 transitions. [2020-08-21 14:16:34,680 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 323 transitions. Word has length 77 [2020-08-21 14:16:34,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:34,680 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 323 transitions. [2020-08-21 14:16:34,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:16:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 323 transitions. [2020-08-21 14:16:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 14:16:34,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:34,685 INFO L422 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] [2020-08-21 14:16:34,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:16:34,686 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:34,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:34,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2125445556, now seen corresponding path program 1 times [2020-08-21 14:16:34,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:34,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208033788] [2020-08-21 14:16:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:34,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208033788] [2020-08-21 14:16:34,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:34,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 14:16:34,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545144455] [2020-08-21 14:16:34,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:16:34,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:16:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:16:34,887 INFO L87 Difference]: Start difference. First operand 244 states and 323 transitions. Second operand 10 states. [2020-08-21 14:16:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:36,058 INFO L93 Difference]: Finished difference Result 573 states and 802 transitions. [2020-08-21 14:16:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:16:36,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 14:16:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:36,066 INFO L225 Difference]: With dead ends: 573 [2020-08-21 14:16:36,067 INFO L226 Difference]: Without dead ends: 348 [2020-08-21 14:16:36,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:16:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-21 14:16:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2020-08-21 14:16:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-21 14:16:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 316 transitions. [2020-08-21 14:16:36,157 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 316 transitions. Word has length 77 [2020-08-21 14:16:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:36,157 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 316 transitions. [2020-08-21 14:16:36,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:16:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 316 transitions. [2020-08-21 14:16:36,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 14:16:36,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:36,171 INFO L422 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] [2020-08-21 14:16:36,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:16:36,171 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:36,172 INFO L82 PathProgramCache]: Analyzing trace with hash -676620532, now seen corresponding path program 1 times [2020-08-21 14:16:36,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:36,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214487264] [2020-08-21 14:16:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:36,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214487264] [2020-08-21 14:16:36,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:36,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 14:16:36,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983452215] [2020-08-21 14:16:36,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:16:36,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:36,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:16:36,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:16:36,400 INFO L87 Difference]: Start difference. First operand 244 states and 316 transitions. Second operand 10 states. [2020-08-21 14:16:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:37,823 INFO L93 Difference]: Finished difference Result 696 states and 1012 transitions. [2020-08-21 14:16:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:16:37,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 14:16:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:37,831 INFO L225 Difference]: With dead ends: 696 [2020-08-21 14:16:37,832 INFO L226 Difference]: Without dead ends: 471 [2020-08-21 14:16:37,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:16:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2020-08-21 14:16:37,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 296. [2020-08-21 14:16:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-21 14:16:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 369 transitions. [2020-08-21 14:16:37,915 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 369 transitions. Word has length 77 [2020-08-21 14:16:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:37,915 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 369 transitions. [2020-08-21 14:16:37,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:16:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 369 transitions. [2020-08-21 14:16:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 14:16:37,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:37,917 INFO L422 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] [2020-08-21 14:16:37,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:16:37,918 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:37,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:37,918 INFO L82 PathProgramCache]: Analyzing trace with hash 758526605, now seen corresponding path program 1 times [2020-08-21 14:16:37,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:37,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156443582] [2020-08-21 14:16:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:37,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:38,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:38,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:38,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:38,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:38,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:38,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:38,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:38,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156443582] [2020-08-21 14:16:38,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:38,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 14:16:38,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266070660] [2020-08-21 14:16:38,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:16:38,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:16:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:16:38,091 INFO L87 Difference]: Start difference. First operand 296 states and 369 transitions. Second operand 10 states. [2020-08-21 14:16:39,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:39,388 INFO L93 Difference]: Finished difference Result 718 states and 955 transitions. [2020-08-21 14:16:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:16:39,391 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 14:16:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:39,395 INFO L225 Difference]: With dead ends: 718 [2020-08-21 14:16:39,395 INFO L226 Difference]: Without dead ends: 442 [2020-08-21 14:16:39,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:16:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-08-21 14:16:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 316. [2020-08-21 14:16:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-21 14:16:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 389 transitions. [2020-08-21 14:16:39,445 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 389 transitions. Word has length 77 [2020-08-21 14:16:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:39,446 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 389 transitions. [2020-08-21 14:16:39,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:16:39,446 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 389 transitions. [2020-08-21 14:16:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 14:16:39,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:39,448 INFO L422 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] [2020-08-21 14:16:39,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:16:39,449 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash -613280693, now seen corresponding path program 1 times [2020-08-21 14:16:39,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:39,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333175608] [2020-08-21 14:16:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:39,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333175608] [2020-08-21 14:16:39,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:39,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 14:16:39,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884477465] [2020-08-21 14:16:39,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:16:39,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:39,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:16:39,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:16:39,649 INFO L87 Difference]: Start difference. First operand 316 states and 389 transitions. Second operand 10 states. [2020-08-21 14:16:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:40,903 INFO L93 Difference]: Finished difference Result 748 states and 981 transitions. [2020-08-21 14:16:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:16:40,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 14:16:40,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:40,908 INFO L225 Difference]: With dead ends: 748 [2020-08-21 14:16:40,908 INFO L226 Difference]: Without dead ends: 452 [2020-08-21 14:16:40,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:16:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-08-21 14:16:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 326. [2020-08-21 14:16:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-08-21 14:16:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 397 transitions. [2020-08-21 14:16:40,943 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 397 transitions. Word has length 77 [2020-08-21 14:16:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:40,943 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 397 transitions. [2020-08-21 14:16:40,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:16:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 397 transitions. [2020-08-21 14:16:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 14:16:40,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:40,947 INFO L422 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] [2020-08-21 14:16:40,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:16:40,947 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:40,948 INFO L82 PathProgramCache]: Analyzing trace with hash 88319181, now seen corresponding path program 1 times [2020-08-21 14:16:40,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:40,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631309575] [2020-08-21 14:16:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:41,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631309575] [2020-08-21 14:16:41,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:41,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 14:16:41,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037101288] [2020-08-21 14:16:41,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:16:41,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:16:41,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:16:41,158 INFO L87 Difference]: Start difference. First operand 326 states and 397 transitions. Second operand 10 states. [2020-08-21 14:16:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:42,572 INFO L93 Difference]: Finished difference Result 894 states and 1170 transitions. [2020-08-21 14:16:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 14:16:42,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 77 [2020-08-21 14:16:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:42,581 INFO L225 Difference]: With dead ends: 894 [2020-08-21 14:16:42,581 INFO L226 Difference]: Without dead ends: 587 [2020-08-21 14:16:42,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:16:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-21 14:16:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 362. [2020-08-21 14:16:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-08-21 14:16:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 422 transitions. [2020-08-21 14:16:42,624 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 422 transitions. Word has length 77 [2020-08-21 14:16:42,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:42,626 INFO L479 AbstractCegarLoop]: Abstraction has 362 states and 422 transitions. [2020-08-21 14:16:42,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:16:42,626 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 422 transitions. [2020-08-21 14:16:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 14:16:42,627 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:42,627 INFO L422 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] [2020-08-21 14:16:42,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:16:42,628 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:42,628 INFO L82 PathProgramCache]: Analyzing trace with hash 228867791, now seen corresponding path program 1 times [2020-08-21 14:16:42,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:42,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193940393] [2020-08-21 14:16:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 14:16:42,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193940393] [2020-08-21 14:16:42,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:42,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 14:16:42,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249621263] [2020-08-21 14:16:42,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:16:42,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:42,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:16:42,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:16:42,757 INFO L87 Difference]: Start difference. First operand 362 states and 422 transitions. Second operand 7 states. [2020-08-21 14:16:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:43,948 INFO L93 Difference]: Finished difference Result 1180 states and 1487 transitions. [2020-08-21 14:16:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:16:43,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-08-21 14:16:43,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:43,958 INFO L225 Difference]: With dead ends: 1180 [2020-08-21 14:16:43,959 INFO L226 Difference]: Without dead ends: 838 [2020-08-21 14:16:43,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:16:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2020-08-21 14:16:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 736. [2020-08-21 14:16:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-08-21 14:16:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 896 transitions. [2020-08-21 14:16:44,027 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 896 transitions. Word has length 77 [2020-08-21 14:16:44,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:44,028 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 896 transitions. [2020-08-21 14:16:44,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:16:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 896 transitions. [2020-08-21 14:16:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 14:16:44,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:44,030 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:44,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:16:44,031 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:44,031 INFO L82 PathProgramCache]: Analyzing trace with hash -208124888, now seen corresponding path program 1 times [2020-08-21 14:16:44,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:44,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543398948] [2020-08-21 14:16:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 14:16:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:16:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 14:16:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:16:44,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543398948] [2020-08-21 14:16:44,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:16:44,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:16:44,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761299804] [2020-08-21 14:16:44,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:16:44,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:44,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:16:44,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:44,259 INFO L87 Difference]: Start difference. First operand 736 states and 896 transitions. Second operand 9 states. [2020-08-21 14:16:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:46,007 INFO L93 Difference]: Finished difference Result 2077 states and 2719 transitions. [2020-08-21 14:16:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:16:46,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-08-21 14:16:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:46,019 INFO L225 Difference]: With dead ends: 2077 [2020-08-21 14:16:46,019 INFO L226 Difference]: Without dead ends: 1361 [2020-08-21 14:16:46,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:16:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2020-08-21 14:16:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1278. [2020-08-21 14:16:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2020-08-21 14:16:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1535 transitions. [2020-08-21 14:16:46,161 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1535 transitions. Word has length 121 [2020-08-21 14:16:46,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:46,162 INFO L479 AbstractCegarLoop]: Abstraction has 1278 states and 1535 transitions. [2020-08-21 14:16:46,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:16:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1535 transitions. [2020-08-21 14:16:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 14:16:46,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:46,167 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:16:46,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:16:46,167 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:46,168 INFO L82 PathProgramCache]: Analyzing trace with hash 772889349, now seen corresponding path program 1 times [2020-08-21 14:16:46,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:46,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078039337] [2020-08-21 14:16:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 14:16:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:16:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 14:16:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-08-21 14:16:46,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078039337] [2020-08-21 14:16:46,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:16:46,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 14:16:46,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262065479] [2020-08-21 14:16:46,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:16:46,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:46,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:16:46,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:46,356 INFO L87 Difference]: Start difference. First operand 1278 states and 1535 transitions. Second operand 9 states. [2020-08-21 14:16:48,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:48,109 INFO L93 Difference]: Finished difference Result 3315 states and 4133 transitions. [2020-08-21 14:16:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 14:16:48,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2020-08-21 14:16:48,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:48,121 INFO L225 Difference]: With dead ends: 3315 [2020-08-21 14:16:48,121 INFO L226 Difference]: Without dead ends: 1560 [2020-08-21 14:16:48,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:16:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2020-08-21 14:16:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1494. [2020-08-21 14:16:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-08-21 14:16:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1762 transitions. [2020-08-21 14:16:48,246 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1762 transitions. Word has length 121 [2020-08-21 14:16:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:48,246 INFO L479 AbstractCegarLoop]: Abstraction has 1494 states and 1762 transitions. [2020-08-21 14:16:48,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:16:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1762 transitions. [2020-08-21 14:16:48,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-21 14:16:48,254 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:48,254 INFO L422 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, 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] [2020-08-21 14:16:48,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:16:48,254 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:48,255 INFO L82 PathProgramCache]: Analyzing trace with hash 846884099, now seen corresponding path program 1 times [2020-08-21 14:16:48,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:48,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141368691] [2020-08-21 14:16:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 14:16:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 14:16:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 14:16:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:16:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-21 14:16:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:16:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-21 14:16:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-08-21 14:16:48,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141368691] [2020-08-21 14:16:48,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:16:48,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:16:48,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811101579] [2020-08-21 14:16:48,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:16:48,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:16:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:16:48,503 INFO L87 Difference]: Start difference. First operand 1494 states and 1762 transitions. Second operand 9 states. [2020-08-21 14:16:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:49,947 INFO L93 Difference]: Finished difference Result 3041 states and 3692 transitions. [2020-08-21 14:16:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:16:49,948 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2020-08-21 14:16:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:49,956 INFO L225 Difference]: With dead ends: 3041 [2020-08-21 14:16:49,957 INFO L226 Difference]: Without dead ends: 1568 [2020-08-21 14:16:49,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:16:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2020-08-21 14:16:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1488. [2020-08-21 14:16:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1488 states. [2020-08-21 14:16:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1728 transitions. [2020-08-21 14:16:50,082 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1728 transitions. Word has length 175 [2020-08-21 14:16:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:50,082 INFO L479 AbstractCegarLoop]: Abstraction has 1488 states and 1728 transitions. [2020-08-21 14:16:50,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:16:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1728 transitions. [2020-08-21 14:16:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-21 14:16:50,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:50,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-21 14:16:50,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:16:50,091 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:50,092 INFO L82 PathProgramCache]: Analyzing trace with hash -797989467, now seen corresponding path program 1 times [2020-08-21 14:16:50,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:50,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774689743] [2020-08-21 14:16:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 14:16:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:16:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 14:16:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-21 14:16:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 14:16:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:16:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-21 14:16:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-08-21 14:16:50,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774689743] [2020-08-21 14:16:50,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:16:50,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:16:50,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805724372] [2020-08-21 14:16:50,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:16:50,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:50,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:16:50,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:16:50,357 INFO L87 Difference]: Start difference. First operand 1488 states and 1728 transitions. Second operand 10 states. [2020-08-21 14:16:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:52,012 INFO L93 Difference]: Finished difference Result 3478 states and 4131 transitions. [2020-08-21 14:16:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 14:16:52,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 176 [2020-08-21 14:16:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:52,022 INFO L225 Difference]: With dead ends: 3478 [2020-08-21 14:16:52,023 INFO L226 Difference]: Without dead ends: 1006 [2020-08-21 14:16:52,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:16:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2020-08-21 14:16:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 970. [2020-08-21 14:16:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-08-21 14:16:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1098 transitions. [2020-08-21 14:16:52,108 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1098 transitions. Word has length 176 [2020-08-21 14:16:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:52,108 INFO L479 AbstractCegarLoop]: Abstraction has 970 states and 1098 transitions. [2020-08-21 14:16:52,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:16:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1098 transitions. [2020-08-21 14:16:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-21 14:16:52,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:16:52,112 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-21 14:16:52,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:16:52,112 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:16:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:16:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash -421514357, now seen corresponding path program 1 times [2020-08-21 14:16:52,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:16:52,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73223954] [2020-08-21 14:16:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:16:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:16:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:16:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 14:16:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 14:16:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:16:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:16:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:16:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 14:16:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 14:16:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 14:16:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:16:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-21 14:16:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 14:16:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:16:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 14:16:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 14:16:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-21 14:16:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:16:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-08-21 14:16:52,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73223954] [2020-08-21 14:16:52,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:16:52,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:16:52,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409032633] [2020-08-21 14:16:52,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:16:52,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:16:52,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:16:52,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:16:52,522 INFO L87 Difference]: Start difference. First operand 970 states and 1098 transitions. Second operand 12 states. [2020-08-21 14:16:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:16:54,756 INFO L93 Difference]: Finished difference Result 1204 states and 1390 transitions. [2020-08-21 14:16:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 14:16:54,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 176 [2020-08-21 14:16:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:16:54,758 INFO L225 Difference]: With dead ends: 1204 [2020-08-21 14:16:54,758 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:16:54,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:16:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:16:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:16:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:16:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:16:54,764 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 176 [2020-08-21 14:16:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:16:54,764 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:16:54,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:16:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:16:54,764 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:16:54,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:16:54,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:16:55,543 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 14:16:55,755 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 14:16:55,964 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 14:16:56,127 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 14:16:56,351 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 116 [2020-08-21 14:16:57,520 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 104 [2020-08-21 14:17:06,453 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-08-21 14:17:07,680 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 137 DAG size of output: 57 [2020-08-21 14:17:08,065 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-08-21 14:17:08,695 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 14:17:09,406 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 14:17:09,566 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-08-21 14:17:10,215 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 14:17:10,864 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 14:17:10,991 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-08-21 14:17:11,647 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 14:17:12,605 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 82 [2020-08-21 14:17:12,782 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-08-21 14:17:13,497 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 79 [2020-08-21 14:17:14,908 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 176 DAG size of output: 61 [2020-08-21 14:17:15,327 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-08-21 14:17:16,316 WARN L193 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 59 [2020-08-21 14:17:17,383 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2020-08-21 14:17:18,493 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 166 DAG size of output: 83 [2020-08-21 14:17:19,149 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 14:17:19,427 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-08-21 14:17:21,734 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-08-21 14:17:22,563 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 55 [2020-08-21 14:17:22,877 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-08-21 14:17:25,147 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-08-21 14:17:25,503 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-08-21 14:17:26,141 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2020-08-21 14:17:28,380 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 198 DAG size of output: 99 [2020-08-21 14:17:28,485 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-08-21 14:17:28,596 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-08-21 14:17:28,876 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49