/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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.02.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:08:29,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:08:29,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:08:29,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:08:29,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:08:29,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:08:29,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:08:29,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:08:29,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:08:29,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:08:29,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:08:29,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:08:29,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:08:29,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:08:29,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:08:29,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:08:29,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:08:29,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:08:29,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:08:29,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:08:29,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:08:29,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:08:29,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:08:29,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:08:29,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:08:29,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:08:29,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:08:29,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:08:29,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:08:29,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:08:29,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:08:29,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:08:29,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:08:29,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:08:29,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:08:29,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:08:29,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:08:29,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:08:29,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:08:29,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:08:29,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:08:29,237 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 23:08:29,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:08:29,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:08:29,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:08:29,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:08:29,261 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:08:29,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:08:29,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:08:29,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:08:29,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:08:29,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:08:29,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:08:29,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:08:29,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:08:29,262 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:08:29,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:08:29,263 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:08:29,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:08:29,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:08:29,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:08:29,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:08:29,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:08:29,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:08:29,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:08:29,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:08:29,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:08:29,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:08:29,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:08:29,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:08:29,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:08:29,265 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 -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 23:08:29,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:08:29,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:08:29,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:08:29,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:08:29,585 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:08:29,586 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-21 23:08:29,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e060218cd/9d485f604bf24110abe5afada641d95d/FLAGf382dbd36 [2020-08-21 23:08:30,167 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:08:30,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-21 23:08:30,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e060218cd/9d485f604bf24110abe5afada641d95d/FLAGf382dbd36 [2020-08-21 23:08:30,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e060218cd/9d485f604bf24110abe5afada641d95d [2020-08-21 23:08:30,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:08:30,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:08:30,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:08:30,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:08:30,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:08:30,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:08:30" (1/1) ... [2020-08-21 23:08:30,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218d3b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30, skipping insertion in model container [2020-08-21 23:08:30,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:08:30" (1/1) ... [2020-08-21 23:08:30,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:08:30,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:08:30,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:08:30,794 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:08:30,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:08:30,955 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:08:30,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30 WrapperNode [2020-08-21 23:08:30,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:08:30,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:08:30,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:08:30,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:08:30,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30" (1/1) ... [2020-08-21 23:08:30,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30" (1/1) ... [2020-08-21 23:08:30,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30" (1/1) ... [2020-08-21 23:08:30,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30" (1/1) ... [2020-08-21 23:08:30,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30" (1/1) ... [2020-08-21 23:08:31,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30" (1/1) ... [2020-08-21 23:08:31,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30" (1/1) ... [2020-08-21 23:08:31,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:08:31,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:08:31,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:08:31,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:08:31,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30" (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 23:08:31,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:08:31,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:08:31,081 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 23:08:31,081 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-21 23:08:31,081 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-21 23:08:31,081 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-08-21 23:08:31,081 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-21 23:08:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-21 23:08:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-08-21 23:08:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-21 23:08:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 23:08:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 23:08:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 23:08:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-21 23:08:31,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-21 23:08:31,083 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-21 23:08:31,083 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-21 23:08:31,083 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-21 23:08:31,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-21 23:08:31,083 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 23:08:31,084 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 23:08:31,084 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 23:08:31,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:08:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:08:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 23:08:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-21 23:08:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-21 23:08:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-08-21 23:08:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-21 23:08:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:08:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-21 23:08:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-21 23:08:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-08-21 23:08:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-21 23:08:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 23:08:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 23:08:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 23:08:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-21 23:08:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-21 23:08:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-21 23:08:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-21 23:08:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-21 23:08:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 23:08:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 23:08:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 23:08:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:08:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:08:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:08:31,741 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:08:31,741 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 23:08:31,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:08:31 BoogieIcfgContainer [2020-08-21 23:08:31,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:08:31,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:08:31,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:08:31,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:08:31,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:08:30" (1/3) ... [2020-08-21 23:08:31,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fed09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:08:31, skipping insertion in model container [2020-08-21 23:08:31,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:08:30" (2/3) ... [2020-08-21 23:08:31,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fed09e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:08:31, skipping insertion in model container [2020-08-21 23:08:31,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:08:31" (3/3) ... [2020-08-21 23:08:31,774 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2020-08-21 23:08:31,787 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:08:31,802 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:08:31,817 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:08:31,841 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:08:31,841 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:08:31,842 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:08:31,842 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:08:31,842 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:08:31,842 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:08:31,842 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:08:31,843 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:08:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-08-21 23:08:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:08:31,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:31,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:31,880 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:31,886 INFO L82 PathProgramCache]: Analyzing trace with hash -67309704, now seen corresponding path program 1 times [2020-08-21 23:08:31,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:31,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196905188] [2020-08-21 23:08:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:32,605 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 23:08:32,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196905188] [2020-08-21 23:08:32,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:32,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 23:08:32,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870064470] [2020-08-21 23:08:32,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 23:08:32,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:32,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 23:08:32,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:08:32,639 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 14 states. [2020-08-21 23:08:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:35,454 INFO L93 Difference]: Finished difference Result 449 states and 710 transitions. [2020-08-21 23:08:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 23:08:35,456 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-08-21 23:08:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:35,475 INFO L225 Difference]: With dead ends: 449 [2020-08-21 23:08:35,475 INFO L226 Difference]: Without dead ends: 276 [2020-08-21 23:08:35,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:08:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-08-21 23:08:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 177. [2020-08-21 23:08:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-21 23:08:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 237 transitions. [2020-08-21 23:08:35,571 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 237 transitions. Word has length 92 [2020-08-21 23:08:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:35,572 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 237 transitions. [2020-08-21 23:08:35,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 23:08:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 237 transitions. [2020-08-21 23:08:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:08:35,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:35,578 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:35,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:08:35,579 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2098275908, now seen corresponding path program 1 times [2020-08-21 23:08:35,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:35,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814052422] [2020-08-21 23:08:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:35,833 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 23:08:35,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814052422] [2020-08-21 23:08:35,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:35,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:08:35,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553147642] [2020-08-21 23:08:35,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:08:35,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:35,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:08:35,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:35,838 INFO L87 Difference]: Start difference. First operand 177 states and 237 transitions. Second operand 10 states. [2020-08-21 23:08:37,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:37,364 INFO L93 Difference]: Finished difference Result 425 states and 610 transitions. [2020-08-21 23:08:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:08:37,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:08:37,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:37,370 INFO L225 Difference]: With dead ends: 425 [2020-08-21 23:08:37,370 INFO L226 Difference]: Without dead ends: 268 [2020-08-21 23:08:37,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-08-21 23:08:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-21 23:08:37,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 177. [2020-08-21 23:08:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-21 23:08:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 234 transitions. [2020-08-21 23:08:37,409 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 234 transitions. Word has length 92 [2020-08-21 23:08:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:37,409 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 234 transitions. [2020-08-21 23:08:37,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:08:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 234 transitions. [2020-08-21 23:08:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:08:37,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:37,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:37,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:08:37,413 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1653808840, now seen corresponding path program 1 times [2020-08-21 23:08:37,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:37,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852488460] [2020-08-21 23:08:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:37,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:37,634 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 23:08:37,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852488460] [2020-08-21 23:08:37,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:37,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:08:37,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042500987] [2020-08-21 23:08:37,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:08:37,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:37,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:08:37,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:37,637 INFO L87 Difference]: Start difference. First operand 177 states and 234 transitions. Second operand 10 states. [2020-08-21 23:08:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:39,546 INFO L93 Difference]: Finished difference Result 504 states and 747 transitions. [2020-08-21 23:08:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:08:39,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:08:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:39,552 INFO L225 Difference]: With dead ends: 504 [2020-08-21 23:08:39,552 INFO L226 Difference]: Without dead ends: 347 [2020-08-21 23:08:39,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-08-21 23:08:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-08-21 23:08:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 213. [2020-08-21 23:08:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-21 23:08:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 274 transitions. [2020-08-21 23:08:39,592 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 274 transitions. Word has length 92 [2020-08-21 23:08:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:39,593 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 274 transitions. [2020-08-21 23:08:39,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:08:39,593 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 274 transitions. [2020-08-21 23:08:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:08:39,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:39,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:39,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:08:39,596 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash -550041895, now seen corresponding path program 1 times [2020-08-21 23:08:39,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:39,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299402065] [2020-08-21 23:08:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:39,791 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 23:08:39,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299402065] [2020-08-21 23:08:39,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:39,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:08:39,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976760709] [2020-08-21 23:08:39,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:08:39,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:39,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:08:39,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:39,794 INFO L87 Difference]: Start difference. First operand 213 states and 274 transitions. Second operand 10 states. [2020-08-21 23:08:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:41,755 INFO L93 Difference]: Finished difference Result 586 states and 840 transitions. [2020-08-21 23:08:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:08:41,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:08:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:41,767 INFO L225 Difference]: With dead ends: 586 [2020-08-21 23:08:41,767 INFO L226 Difference]: Without dead ends: 393 [2020-08-21 23:08:41,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-08-21 23:08:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-08-21 23:08:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 249. [2020-08-21 23:08:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-21 23:08:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 312 transitions. [2020-08-21 23:08:41,837 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 312 transitions. Word has length 92 [2020-08-21 23:08:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:41,838 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 312 transitions. [2020-08-21 23:08:41,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:08:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 312 transitions. [2020-08-21 23:08:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:08:41,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:41,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:41,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:08:41,849 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1219969707, now seen corresponding path program 1 times [2020-08-21 23:08:41,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:41,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071002296] [2020-08-21 23:08:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:41,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:41,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:41,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:41,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:41,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:42,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:42,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:42,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:42,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:42,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:42,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:42,068 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 23:08:42,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071002296] [2020-08-21 23:08:42,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:42,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:08:42,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689233213] [2020-08-21 23:08:42,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:08:42,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:08:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:42,072 INFO L87 Difference]: Start difference. First operand 249 states and 312 transitions. Second operand 10 states. [2020-08-21 23:08:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:43,934 INFO L93 Difference]: Finished difference Result 663 states and 922 transitions. [2020-08-21 23:08:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:08:43,935 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:08:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:43,939 INFO L225 Difference]: With dead ends: 663 [2020-08-21 23:08:43,940 INFO L226 Difference]: Without dead ends: 434 [2020-08-21 23:08:43,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-08-21 23:08:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-08-21 23:08:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 282. [2020-08-21 23:08:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-21 23:08:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2020-08-21 23:08:43,978 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 92 [2020-08-21 23:08:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:43,978 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2020-08-21 23:08:43,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:08:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2020-08-21 23:08:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:08:43,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:43,980 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:43,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:08:43,980 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:43,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1929357560, now seen corresponding path program 1 times [2020-08-21 23:08:43,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:43,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676028449] [2020-08-21 23:08:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:44,202 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 23:08:44,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676028449] [2020-08-21 23:08:44,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:44,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:08:44,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341093177] [2020-08-21 23:08:44,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:08:44,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:44,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:08:44,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:44,206 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand 10 states. [2020-08-21 23:08:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:45,954 INFO L93 Difference]: Finished difference Result 674 states and 877 transitions. [2020-08-21 23:08:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 23:08:45,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:08:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:45,958 INFO L225 Difference]: With dead ends: 674 [2020-08-21 23:08:45,958 INFO L226 Difference]: Without dead ends: 413 [2020-08-21 23:08:45,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-08-21 23:08:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-21 23:08:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 287. [2020-08-21 23:08:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-08-21 23:08:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 347 transitions. [2020-08-21 23:08:45,997 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 347 transitions. Word has length 92 [2020-08-21 23:08:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:45,998 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 347 transitions. [2020-08-21 23:08:45,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:08:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 347 transitions. [2020-08-21 23:08:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:08:45,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:45,999 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:46,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:08:46,000 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1031964282, now seen corresponding path program 1 times [2020-08-21 23:08:46,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:46,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259620171] [2020-08-21 23:08:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:46,235 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 23:08:46,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259620171] [2020-08-21 23:08:46,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:46,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:08:46,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346495043] [2020-08-21 23:08:46,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:08:46,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:46,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:08:46,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:46,239 INFO L87 Difference]: Start difference. First operand 287 states and 347 transitions. Second operand 10 states. [2020-08-21 23:08:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:48,646 INFO L93 Difference]: Finished difference Result 1068 states and 1350 transitions. [2020-08-21 23:08:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 23:08:48,647 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:08:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:48,654 INFO L225 Difference]: With dead ends: 1068 [2020-08-21 23:08:48,655 INFO L226 Difference]: Without dead ends: 801 [2020-08-21 23:08:48,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-08-21 23:08:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2020-08-21 23:08:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 591. [2020-08-21 23:08:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-21 23:08:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 707 transitions. [2020-08-21 23:08:48,739 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 707 transitions. Word has length 92 [2020-08-21 23:08:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:48,740 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 707 transitions. [2020-08-21 23:08:48,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:08:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 707 transitions. [2020-08-21 23:08:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:08:48,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:48,741 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:48,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:08:48,741 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1054596536, now seen corresponding path program 1 times [2020-08-21 23:08:48,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:48,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261204258] [2020-08-21 23:08:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:48,896 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 23:08:48,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261204258] [2020-08-21 23:08:48,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:48,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:08:48,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445130895] [2020-08-21 23:08:48,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:08:48,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:08:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:08:48,900 INFO L87 Difference]: Start difference. First operand 591 states and 707 transitions. Second operand 7 states. [2020-08-21 23:08:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:51,040 INFO L93 Difference]: Finished difference Result 2051 states and 2640 transitions. [2020-08-21 23:08:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:08:51,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-08-21 23:08:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:51,050 INFO L225 Difference]: With dead ends: 2051 [2020-08-21 23:08:51,051 INFO L226 Difference]: Without dead ends: 1481 [2020-08-21 23:08:51,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:08:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-08-21 23:08:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1207. [2020-08-21 23:08:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-08-21 23:08:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1495 transitions. [2020-08-21 23:08:51,177 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1495 transitions. Word has length 92 [2020-08-21 23:08:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:51,177 INFO L479 AbstractCegarLoop]: Abstraction has 1207 states and 1495 transitions. [2020-08-21 23:08:51,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:08:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1495 transitions. [2020-08-21 23:08:51,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 23:08:51,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:51,183 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, 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 23:08:51,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:08:51,184 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:51,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1357284192, now seen corresponding path program 1 times [2020-08-21 23:08:51,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:51,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197009466] [2020-08-21 23:08:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:08:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:08:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-21 23:08:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-21 23:08:51,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197009466] [2020-08-21 23:08:51,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:51,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 23:08:51,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627966943] [2020-08-21 23:08:51,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:08:51,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:51,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:08:51,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:08:51,449 INFO L87 Difference]: Start difference. First operand 1207 states and 1495 transitions. Second operand 9 states. [2020-08-21 23:08:54,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:54,225 INFO L93 Difference]: Finished difference Result 3860 states and 4987 transitions. [2020-08-21 23:08:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:08:54,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2020-08-21 23:08:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:54,243 INFO L225 Difference]: With dead ends: 3860 [2020-08-21 23:08:54,244 INFO L226 Difference]: Without dead ends: 2675 [2020-08-21 23:08:54,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:08:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2020-08-21 23:08:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2303. [2020-08-21 23:08:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-08-21 23:08:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2940 transitions. [2020-08-21 23:08:54,480 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2940 transitions. Word has length 147 [2020-08-21 23:08:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:54,481 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2940 transitions. [2020-08-21 23:08:54,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:08:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2940 transitions. [2020-08-21 23:08:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-08-21 23:08:54,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:54,488 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:54,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:08:54,488 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash 674078602, now seen corresponding path program 1 times [2020-08-21 23:08:54,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:54,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673255228] [2020-08-21 23:08:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:08:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:08:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-21 23:08:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:08:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-21 23:08:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-08-21 23:08:54,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673255228] [2020-08-21 23:08:54,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:08:54,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:08:54,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560908499] [2020-08-21 23:08:54,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:08:54,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:08:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:08:54,899 INFO L87 Difference]: Start difference. First operand 2303 states and 2940 transitions. Second operand 10 states. [2020-08-21 23:08:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:08:57,674 INFO L93 Difference]: Finished difference Result 6901 states and 9607 transitions. [2020-08-21 23:08:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:08:57,674 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 191 [2020-08-21 23:08:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:08:57,703 INFO L225 Difference]: With dead ends: 6901 [2020-08-21 23:08:57,703 INFO L226 Difference]: Without dead ends: 4625 [2020-08-21 23:08:57,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2020-08-21 23:08:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4625 states. [2020-08-21 23:08:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4625 to 4205. [2020-08-21 23:08:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4205 states. [2020-08-21 23:08:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4205 states to 4205 states and 5340 transitions. [2020-08-21 23:08:58,216 INFO L78 Accepts]: Start accepts. Automaton has 4205 states and 5340 transitions. Word has length 191 [2020-08-21 23:08:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:08:58,217 INFO L479 AbstractCegarLoop]: Abstraction has 4205 states and 5340 transitions. [2020-08-21 23:08:58,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:08:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4205 states and 5340 transitions. [2020-08-21 23:08:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-21 23:08:58,226 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:08:58,226 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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:08:58,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:08:58,226 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:08:58,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:08:58,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2111585836, now seen corresponding path program 1 times [2020-08-21 23:08:58,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:08:58,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735877966] [2020-08-21 23:08:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:08:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:08:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:08:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:08:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:08:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:08:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:08:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:08:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:08:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:08:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:08:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:08:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 23:08:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:08:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:08:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:08:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 23:08:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:08:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-21 23:08:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:08:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-08-21 23:08:58,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735877966] [2020-08-21 23:08:58,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:08:58,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 23:08:58,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066871147] [2020-08-21 23:08:58,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 23:08:58,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:08:58,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 23:08:58,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:08:58,740 INFO L87 Difference]: Start difference. First operand 4205 states and 5340 transitions. Second operand 13 states. [2020-08-21 23:09:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:02,278 INFO L93 Difference]: Finished difference Result 11376 states and 15335 transitions. [2020-08-21 23:09:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 23:09:02,279 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2020-08-21 23:09:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:02,310 INFO L225 Difference]: With dead ends: 11376 [2020-08-21 23:09:02,311 INFO L226 Difference]: Without dead ends: 5377 [2020-08-21 23:09:02,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2020-08-21 23:09:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2020-08-21 23:09:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4715. [2020-08-21 23:09:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4715 states. [2020-08-21 23:09:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 5844 transitions. [2020-08-21 23:09:02,946 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 5844 transitions. Word has length 192 [2020-08-21 23:09:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:02,947 INFO L479 AbstractCegarLoop]: Abstraction has 4715 states and 5844 transitions. [2020-08-21 23:09:02,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 23:09:02,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 5844 transitions. [2020-08-21 23:09:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-21 23:09:02,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:02,956 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:09:02,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:09:02,957 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1371624313, now seen corresponding path program 1 times [2020-08-21 23:09:02,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:02,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361075800] [2020-08-21 23:09:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:09:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:09:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:09:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:09:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:09:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:09:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:09:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 23:09:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 23:09:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 23:09:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-21 23:09:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:09:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-21 23:09:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:09:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-21 23:09:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-08-21 23:09:03,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361075800] [2020-08-21 23:09:03,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:09:03,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:09:03,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204418658] [2020-08-21 23:09:03,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:09:03,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:09:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:09:03,394 INFO L87 Difference]: Start difference. First operand 4715 states and 5844 transitions. Second operand 10 states. [2020-08-21 23:09:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:06,184 INFO L93 Difference]: Finished difference Result 9794 states and 12543 transitions. [2020-08-21 23:09:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:09:06,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 219 [2020-08-21 23:09:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:06,226 INFO L225 Difference]: With dead ends: 9794 [2020-08-21 23:09:06,227 INFO L226 Difference]: Without dead ends: 5101 [2020-08-21 23:09:06,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-08-21 23:09:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2020-08-21 23:09:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 4723. [2020-08-21 23:09:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4723 states. [2020-08-21 23:09:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 5800 transitions. [2020-08-21 23:09:07,039 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 5800 transitions. Word has length 219 [2020-08-21 23:09:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:07,042 INFO L479 AbstractCegarLoop]: Abstraction has 4723 states and 5800 transitions. [2020-08-21 23:09:07,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:09:07,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 5800 transitions. [2020-08-21 23:09:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-21 23:09:07,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:07,056 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:09:07,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:09:07,057 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1042203604, now seen corresponding path program 1 times [2020-08-21 23:09:07,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:07,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019117544] [2020-08-21 23:09:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:09:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:09:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:09:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:09:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:09:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:09:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:09:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:09:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:09:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 23:09:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-21 23:09:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-21 23:09:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-21 23:09:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:09:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-21 23:09:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-08-21 23:09:07,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019117544] [2020-08-21 23:09:07,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:09:07,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 23:09:07,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355583221] [2020-08-21 23:09:07,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 23:09:07,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:07,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 23:09:07,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:09:07,552 INFO L87 Difference]: Start difference. First operand 4723 states and 5800 transitions. Second operand 13 states. [2020-08-21 23:09:07,949 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-08-21 23:09:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:12,064 INFO L93 Difference]: Finished difference Result 14278 states and 19378 transitions. [2020-08-21 23:09:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 23:09:12,065 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 219 [2020-08-21 23:09:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:12,120 INFO L225 Difference]: With dead ends: 14278 [2020-08-21 23:09:12,120 INFO L226 Difference]: Without dead ends: 9577 [2020-08-21 23:09:12,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 23:09:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9577 states. [2020-08-21 23:09:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9577 to 8707. [2020-08-21 23:09:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8707 states. [2020-08-21 23:09:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8707 states to 8707 states and 10918 transitions. [2020-08-21 23:09:13,341 INFO L78 Accepts]: Start accepts. Automaton has 8707 states and 10918 transitions. Word has length 219 [2020-08-21 23:09:13,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:13,342 INFO L479 AbstractCegarLoop]: Abstraction has 8707 states and 10918 transitions. [2020-08-21 23:09:13,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 23:09:13,342 INFO L276 IsEmpty]: Start isEmpty. Operand 8707 states and 10918 transitions. [2020-08-21 23:09:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-21 23:09:13,354 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:13,354 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:09:13,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 23:09:13,355 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:13,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1333946129, now seen corresponding path program 1 times [2020-08-21 23:09:13,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:13,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182720857] [2020-08-21 23:09:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:09:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:09:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:09:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:09:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:09:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:09:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:09:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 23:09:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 23:09:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-21 23:09:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-21 23:09:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:09:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-21 23:09:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:09:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-21 23:09:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 13 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-08-21 23:09:13,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182720857] [2020-08-21 23:09:13,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:09:13,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:09:13,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561647680] [2020-08-21 23:09:13,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:09:13,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:13,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:09:13,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:09:13,697 INFO L87 Difference]: Start difference. First operand 8707 states and 10918 transitions. Second operand 11 states. [2020-08-21 23:09:14,522 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-08-21 23:09:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:17,170 INFO L93 Difference]: Finished difference Result 16591 states and 21162 transitions. [2020-08-21 23:09:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:09:17,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 220 [2020-08-21 23:09:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:17,206 INFO L225 Difference]: With dead ends: 16591 [2020-08-21 23:09:17,207 INFO L226 Difference]: Without dead ends: 9133 [2020-08-21 23:09:17,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:09:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9133 states. [2020-08-21 23:09:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9133 to 8523. [2020-08-21 23:09:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8523 states. [2020-08-21 23:09:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 10072 transitions. [2020-08-21 23:09:17,931 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 10072 transitions. Word has length 220 [2020-08-21 23:09:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:17,932 INFO L479 AbstractCegarLoop]: Abstraction has 8523 states and 10072 transitions. [2020-08-21 23:09:17,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:09:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 10072 transitions. [2020-08-21 23:09:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-08-21 23:09:17,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:17,943 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:09:17,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 23:09:17,943 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1092908987, now seen corresponding path program 1 times [2020-08-21 23:09:17,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:17,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118003012] [2020-08-21 23:09:17,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:09:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:09:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:09:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:09:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:09:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:09:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:09:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:09:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:09:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-21 23:09:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-21 23:09:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-21 23:09:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:09:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-08-21 23:09:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-08-21 23:09:18,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118003012] [2020-08-21 23:09:18,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:09:18,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:09:18,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063636792] [2020-08-21 23:09:18,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:09:18,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:09:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:09:18,253 INFO L87 Difference]: Start difference. First operand 8523 states and 10072 transitions. Second operand 10 states. [2020-08-21 23:09:18,561 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-08-21 23:09:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:09:20,135 INFO L93 Difference]: Finished difference Result 8991 states and 10763 transitions. [2020-08-21 23:09:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:09:20,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 213 [2020-08-21 23:09:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:09:20,163 INFO L225 Difference]: With dead ends: 8991 [2020-08-21 23:09:20,163 INFO L226 Difference]: Without dead ends: 6999 [2020-08-21 23:09:20,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:09:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2020-08-21 23:09:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 6535. [2020-08-21 23:09:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6535 states. [2020-08-21 23:09:21,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6535 states to 6535 states and 7791 transitions. [2020-08-21 23:09:21,258 INFO L78 Accepts]: Start accepts. Automaton has 6535 states and 7791 transitions. Word has length 213 [2020-08-21 23:09:21,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:09:21,259 INFO L479 AbstractCegarLoop]: Abstraction has 6535 states and 7791 transitions. [2020-08-21 23:09:21,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:09:21,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6535 states and 7791 transitions. [2020-08-21 23:09:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-21 23:09:21,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:09:21,267 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:09:21,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 23:09:21,268 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:09:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:09:21,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1521478673, now seen corresponding path program 1 times [2020-08-21 23:09:21,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:09:21,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417263553] [2020-08-21 23:09:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:09:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:09:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:09:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:09:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:09:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:09:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:09:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:09:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:09:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:09:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-21 23:09:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-21 23:09:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-21 23:09:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:09:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:09:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:09:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:09:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:09:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-21 23:09:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:09:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-08-21 23:09:21,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417263553] [2020-08-21 23:09:21,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:09:21,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 23:09:21,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677153895] [2020-08-21 23:09:21,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:09:21,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:09:21,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:09:21,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:09:21,540 INFO L87 Difference]: Start difference. First operand 6535 states and 7791 transitions. Second operand 9 states.