/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=0.4 --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 23:56:55,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:56:55,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:56:55,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:56:55,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:56:55,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:56:55,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:56:55,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:56:55,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:56:55,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:56:55,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:56:55,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:56:55,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:56:55,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:56:55,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:56:55,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:56:55,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:56:55,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:56:55,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:56:55,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:56:55,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:56:55,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:56:55,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:56:55,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:56:55,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:56:55,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:56:55,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:56:55,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:56:55,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:56:55,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:56:55,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:56:55,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:56:55,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:56:55,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:56:55,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:56:55,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:56:55,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:56:55,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:56:55,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:56:55,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:56:55,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:56:55,870 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 23:56:55,897 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:56:55,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:56:55,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:56:55,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:56:55,899 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:56:55,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:56:55,900 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:56:55,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:56:55,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:56:55,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:56:55,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:56:55,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:56:55,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:56:55,901 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:56:55,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:56:55,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:56:55,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:56:55,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:56:55,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:56:55,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:56:55,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:56:55,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:56:55,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:56:55,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:56:55,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:56:55,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:56:55,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:56:55,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:56:55,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:56:55,906 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=0.4;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=0.4;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=0.4;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=0.4;log-additional-information=true; [2020-08-21 23:56:56,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:56:56,244 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:56:56,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:56:56,250 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:56:56,250 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:56:56,251 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-21 23:56:56,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd9fef781/7da649a5c7e543ee85eb3d2cb2d3742d/FLAG1dc8520a4 [2020-08-21 23:56:56,808 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:56:56,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-21 23:56:56,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd9fef781/7da649a5c7e543ee85eb3d2cb2d3742d/FLAG1dc8520a4 [2020-08-21 23:56:57,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd9fef781/7da649a5c7e543ee85eb3d2cb2d3742d [2020-08-21 23:56:57,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:56:57,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:56:57,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:56:57,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:56:57,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:56:57,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f72e2c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57, skipping insertion in model container [2020-08-21 23:56:57,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,195 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:56:57,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:56:57,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:56:57,464 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:56:57,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:56:57,659 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:56:57,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57 WrapperNode [2020-08-21 23:56:57,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:56:57,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:56:57,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:56:57,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:56:57,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (1/1) ... [2020-08-21 23:56:57,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:56:57,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:56:57,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:56:57,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:56:57,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (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 23:56:57,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:56:57,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:56:57,766 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 23:56:57,766 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-21 23:56:57,767 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-21 23:56:57,767 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-08-21 23:56:57,767 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-21 23:56:57,767 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-21 23:56:57,767 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-08-21 23:56:57,767 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-21 23:56:57,767 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 23:56:57,768 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 23:56:57,768 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 23:56:57,768 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-21 23:56:57,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-21 23:56:57,769 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-21 23:56:57,769 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-21 23:56:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-21 23:56:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-21 23:56:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 23:56:57,770 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 23:56:57,771 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 23:56:57,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:56:57,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:56:57,773 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 23:56:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-21 23:56:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-21 23:56:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-08-21 23:56:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-21 23:56:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:56:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-21 23:56:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-21 23:56:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-08-21 23:56:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-21 23:56:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 23:56:57,776 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 23:56:57,776 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 23:56:57,776 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-21 23:56:57,776 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-21 23:56:57,776 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-21 23:56:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-21 23:56:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-21 23:56:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 23:56:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 23:56:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 23:56:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:56:57,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:56:57,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:56:58,380 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:56:58,380 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-21 23:56:58,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:56:58 BoogieIcfgContainer [2020-08-21 23:56:58,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:56:58,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:56:58,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:56:58,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:56:58,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:56:57" (1/3) ... [2020-08-21 23:56:58,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48886c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:56:58, skipping insertion in model container [2020-08-21 23:56:58,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:56:57" (2/3) ... [2020-08-21 23:56:58,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48886c2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:56:58, skipping insertion in model container [2020-08-21 23:56:58,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:56:58" (3/3) ... [2020-08-21 23:56:58,397 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2020-08-21 23:56:58,410 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:56:58,419 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:56:58,434 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:56:58,469 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:56:58,469 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:56:58,469 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:56:58,470 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:56:58,470 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:56:58,470 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:56:58,471 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:56:58,471 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:56:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-08-21 23:56:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:56:58,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:56:58,511 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 23:56:58,512 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:56:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:56:58,519 INFO L82 PathProgramCache]: Analyzing trace with hash -67309704, now seen corresponding path program 1 times [2020-08-21 23:56:58,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:56:58,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774321621] [2020-08-21 23:56:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:56:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:56:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:56:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:58,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:56:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:59,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:56:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:59,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:56:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:59,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:56:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:59,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:56:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:59,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:56:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:59,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:56:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:59,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:56:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:59,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:56:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:56:59,268 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 23:56:59,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774321621] [2020-08-21 23:56:59,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:56:59,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 23:56:59,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119520405] [2020-08-21 23:56:59,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 23:56:59,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:56:59,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 23:56:59,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-21 23:56:59,298 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 14 states. [2020-08-21 23:57:02,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:02,187 INFO L93 Difference]: Finished difference Result 449 states and 710 transitions. [2020-08-21 23:57:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 23:57:02,189 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-08-21 23:57:02,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:02,208 INFO L225 Difference]: With dead ends: 449 [2020-08-21 23:57:02,208 INFO L226 Difference]: Without dead ends: 276 [2020-08-21 23:57:02,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:57:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-08-21 23:57:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 177. [2020-08-21 23:57:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-21 23:57:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 237 transitions. [2020-08-21 23:57:02,304 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 237 transitions. Word has length 92 [2020-08-21 23:57:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:02,304 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 237 transitions. [2020-08-21 23:57:02,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 23:57:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 237 transitions. [2020-08-21 23:57:02,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:57:02,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:02,314 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 23:57:02,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:57:02,317 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2098275908, now seen corresponding path program 1 times [2020-08-21 23:57:02,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:02,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365978851] [2020-08-21 23:57:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:02,568 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 23:57:02,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365978851] [2020-08-21 23:57:02,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:02,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:02,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296647042] [2020-08-21 23:57:02,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:02,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:02,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:02,573 INFO L87 Difference]: Start difference. First operand 177 states and 237 transitions. Second operand 10 states. [2020-08-21 23:57:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:04,103 INFO L93 Difference]: Finished difference Result 425 states and 610 transitions. [2020-08-21 23:57:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:57:04,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:57:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:04,108 INFO L225 Difference]: With dead ends: 425 [2020-08-21 23:57:04,109 INFO L226 Difference]: Without dead ends: 268 [2020-08-21 23:57:04,111 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 23:57:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-21 23:57:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 177. [2020-08-21 23:57:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-21 23:57:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 234 transitions. [2020-08-21 23:57:04,149 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 234 transitions. Word has length 92 [2020-08-21 23:57:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:04,149 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 234 transitions. [2020-08-21 23:57:04,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 234 transitions. [2020-08-21 23:57:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:57:04,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:04,153 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 23:57:04,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:57:04,154 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:04,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1653808840, now seen corresponding path program 1 times [2020-08-21 23:57:04,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:04,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904339849] [2020-08-21 23:57:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:04,416 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 23:57:04,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904339849] [2020-08-21 23:57:04,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:04,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:04,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142247458] [2020-08-21 23:57:04,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:04,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:04,421 INFO L87 Difference]: Start difference. First operand 177 states and 234 transitions. Second operand 10 states. [2020-08-21 23:57:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:06,441 INFO L93 Difference]: Finished difference Result 504 states and 747 transitions. [2020-08-21 23:57:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:57:06,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:57:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:06,453 INFO L225 Difference]: With dead ends: 504 [2020-08-21 23:57:06,453 INFO L226 Difference]: Without dead ends: 347 [2020-08-21 23:57:06,455 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 23:57:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-08-21 23:57:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 213. [2020-08-21 23:57:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-21 23:57:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 274 transitions. [2020-08-21 23:57:06,512 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 274 transitions. Word has length 92 [2020-08-21 23:57:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:06,512 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 274 transitions. [2020-08-21 23:57:06,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 274 transitions. [2020-08-21 23:57:06,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:57:06,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:06,515 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 23:57:06,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:57:06,515 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash -550041895, now seen corresponding path program 1 times [2020-08-21 23:57:06,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:06,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558549695] [2020-08-21 23:57:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:06,693 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 23:57:06,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558549695] [2020-08-21 23:57:06,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:06,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:06,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205560055] [2020-08-21 23:57:06,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:06,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:06,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:06,696 INFO L87 Difference]: Start difference. First operand 213 states and 274 transitions. Second operand 10 states. [2020-08-21 23:57:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:08,628 INFO L93 Difference]: Finished difference Result 586 states and 840 transitions. [2020-08-21 23:57:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:57:08,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:57:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:08,636 INFO L225 Difference]: With dead ends: 586 [2020-08-21 23:57:08,637 INFO L226 Difference]: Without dead ends: 393 [2020-08-21 23:57:08,639 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 23:57:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-08-21 23:57:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 249. [2020-08-21 23:57:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-21 23:57:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 312 transitions. [2020-08-21 23:57:08,703 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 312 transitions. Word has length 92 [2020-08-21 23:57:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:08,704 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 312 transitions. [2020-08-21 23:57:08,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:08,704 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 312 transitions. [2020-08-21 23:57:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:57:08,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:08,716 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 23:57:08,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:57:08,716 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:08,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1219969707, now seen corresponding path program 1 times [2020-08-21 23:57:08,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:08,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936995580] [2020-08-21 23:57:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:08,916 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 23:57:08,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936995580] [2020-08-21 23:57:08,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:08,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:08,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936322914] [2020-08-21 23:57:08,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:08,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:08,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:08,920 INFO L87 Difference]: Start difference. First operand 249 states and 312 transitions. Second operand 10 states. [2020-08-21 23:57:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:10,861 INFO L93 Difference]: Finished difference Result 663 states and 922 transitions. [2020-08-21 23:57:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:57:10,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:57:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:10,865 INFO L225 Difference]: With dead ends: 663 [2020-08-21 23:57:10,866 INFO L226 Difference]: Without dead ends: 434 [2020-08-21 23:57:10,867 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 23:57:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-08-21 23:57:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 282. [2020-08-21 23:57:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-21 23:57:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2020-08-21 23:57:10,902 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 92 [2020-08-21 23:57:10,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:10,903 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2020-08-21 23:57:10,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2020-08-21 23:57:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:57:10,905 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:10,905 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 23:57:10,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:57:10,905 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1929357560, now seen corresponding path program 1 times [2020-08-21 23:57:10,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:10,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514359100] [2020-08-21 23:57:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:10,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:11,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:11,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:11,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:11,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:11,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:11,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:11,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:11,123 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 23:57:11,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514359100] [2020-08-21 23:57:11,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:11,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:11,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531344654] [2020-08-21 23:57:11,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:11,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:11,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:11,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:11,127 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand 10 states. [2020-08-21 23:57:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:12,934 INFO L93 Difference]: Finished difference Result 674 states and 877 transitions. [2020-08-21 23:57:12,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 23:57:12,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:57:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:12,939 INFO L225 Difference]: With dead ends: 674 [2020-08-21 23:57:12,939 INFO L226 Difference]: Without dead ends: 413 [2020-08-21 23:57:12,941 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 23:57:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-21 23:57:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 287. [2020-08-21 23:57:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-08-21 23:57:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 347 transitions. [2020-08-21 23:57:12,998 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 347 transitions. Word has length 92 [2020-08-21 23:57:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:13,000 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 347 transitions. [2020-08-21 23:57:13,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 347 transitions. [2020-08-21 23:57:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:57:13,001 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:13,002 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 23:57:13,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:57:13,002 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:13,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1031964282, now seen corresponding path program 1 times [2020-08-21 23:57:13,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:13,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713968162] [2020-08-21 23:57:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:13,219 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 23:57:13,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713968162] [2020-08-21 23:57:13,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:13,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:13,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866273023] [2020-08-21 23:57:13,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:13,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:13,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:13,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:13,224 INFO L87 Difference]: Start difference. First operand 287 states and 347 transitions. Second operand 10 states. [2020-08-21 23:57:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:15,692 INFO L93 Difference]: Finished difference Result 1068 states and 1350 transitions. [2020-08-21 23:57:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 23:57:15,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-21 23:57:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:15,701 INFO L225 Difference]: With dead ends: 1068 [2020-08-21 23:57:15,702 INFO L226 Difference]: Without dead ends: 801 [2020-08-21 23:57:15,705 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 23:57:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2020-08-21 23:57:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 591. [2020-08-21 23:57:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-21 23:57:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 707 transitions. [2020-08-21 23:57:15,799 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 707 transitions. Word has length 92 [2020-08-21 23:57:15,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:15,800 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 707 transitions. [2020-08-21 23:57:15,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 707 transitions. [2020-08-21 23:57:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 23:57:15,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:15,803 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 23:57:15,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:57:15,803 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:15,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1054596536, now seen corresponding path program 1 times [2020-08-21 23:57:15,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:15,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679563469] [2020-08-21 23:57:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:15,997 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 23:57:15,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679563469] [2020-08-21 23:57:15,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:16,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 23:57:16,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020152642] [2020-08-21 23:57:16,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 23:57:16,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:16,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 23:57:16,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 23:57:16,001 INFO L87 Difference]: Start difference. First operand 591 states and 707 transitions. Second operand 7 states. [2020-08-21 23:57:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:17,893 INFO L93 Difference]: Finished difference Result 2051 states and 2640 transitions. [2020-08-21 23:57:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 23:57:17,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-08-21 23:57:17,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:17,903 INFO L225 Difference]: With dead ends: 2051 [2020-08-21 23:57:17,904 INFO L226 Difference]: Without dead ends: 1481 [2020-08-21 23:57:17,906 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 23:57:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-08-21 23:57:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1207. [2020-08-21 23:57:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-08-21 23:57:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1495 transitions. [2020-08-21 23:57:18,028 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1495 transitions. Word has length 92 [2020-08-21 23:57:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:18,028 INFO L479 AbstractCegarLoop]: Abstraction has 1207 states and 1495 transitions. [2020-08-21 23:57:18,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 23:57:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1495 transitions. [2020-08-21 23:57:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-21 23:57:18,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:18,032 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 23:57:18,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 23:57:18,032 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1357284192, now seen corresponding path program 1 times [2020-08-21 23:57:18,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:18,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355997972] [2020-08-21 23:57:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:57:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-21 23:57:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:18,236 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 23:57:18,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355997972] [2020-08-21 23:57:18,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:18,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 23:57:18,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493739716] [2020-08-21 23:57:18,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:57:18,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:18,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:57:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:57:18,239 INFO L87 Difference]: Start difference. First operand 1207 states and 1495 transitions. Second operand 9 states. [2020-08-21 23:57:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:20,910 INFO L93 Difference]: Finished difference Result 3860 states and 4987 transitions. [2020-08-21 23:57:20,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:57:20,910 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2020-08-21 23:57:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:20,927 INFO L225 Difference]: With dead ends: 3860 [2020-08-21 23:57:20,927 INFO L226 Difference]: Without dead ends: 2675 [2020-08-21 23:57:20,932 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 23:57:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2020-08-21 23:57:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2303. [2020-08-21 23:57:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-08-21 23:57:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2940 transitions. [2020-08-21 23:57:21,158 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2940 transitions. Word has length 147 [2020-08-21 23:57:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:21,159 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2940 transitions. [2020-08-21 23:57:21,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:57:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2940 transitions. [2020-08-21 23:57:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-08-21 23:57:21,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:21,165 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 23:57:21,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 23:57:21,166 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:21,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:21,166 INFO L82 PathProgramCache]: Analyzing trace with hash 674078602, now seen corresponding path program 1 times [2020-08-21 23:57:21,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:21,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566564133] [2020-08-21 23:57:21,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:57:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-21 23:57:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-21 23:57:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:21,457 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 23:57:21,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566564133] [2020-08-21 23:57:21,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:21,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:21,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360769680] [2020-08-21 23:57:21,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:21,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:21,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:21,460 INFO L87 Difference]: Start difference. First operand 2303 states and 2940 transitions. Second operand 10 states. [2020-08-21 23:57:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:24,521 INFO L93 Difference]: Finished difference Result 6901 states and 9607 transitions. [2020-08-21 23:57:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 23:57:24,521 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 191 [2020-08-21 23:57:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:24,551 INFO L225 Difference]: With dead ends: 6901 [2020-08-21 23:57:24,551 INFO L226 Difference]: Without dead ends: 4625 [2020-08-21 23:57:24,569 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 23:57:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4625 states. [2020-08-21 23:57:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4625 to 4205. [2020-08-21 23:57:24,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4205 states. [2020-08-21 23:57:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4205 states to 4205 states and 5340 transitions. [2020-08-21 23:57:24,983 INFO L78 Accepts]: Start accepts. Automaton has 4205 states and 5340 transitions. Word has length 191 [2020-08-21 23:57:24,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:24,984 INFO L479 AbstractCegarLoop]: Abstraction has 4205 states and 5340 transitions. [2020-08-21 23:57:24,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4205 states and 5340 transitions. [2020-08-21 23:57:24,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-08-21 23:57:24,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:24,993 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2020-08-21 23:57:24,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 23:57:24,993 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:24,994 INFO L82 PathProgramCache]: Analyzing trace with hash -635516700, now seen corresponding path program 1 times [2020-08-21 23:57:24,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:24,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810419794] [2020-08-21 23:57:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 23:57:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-21 23:57:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-21 23:57:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-21 23:57:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 23:57:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-21 23:57:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-08-21 23:57:25,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810419794] [2020-08-21 23:57:25,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:57:25,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 23:57:25,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606225317] [2020-08-21 23:57:25,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:57:25,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:25,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:57:25,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:57:25,412 INFO L87 Difference]: Start difference. First operand 4205 states and 5340 transitions. Second operand 10 states. [2020-08-21 23:57:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:27,272 INFO L93 Difference]: Finished difference Result 8766 states and 11212 transitions. [2020-08-21 23:57:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 23:57:27,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 249 [2020-08-21 23:57:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:27,305 INFO L225 Difference]: With dead ends: 8766 [2020-08-21 23:57:27,305 INFO L226 Difference]: Without dead ends: 4582 [2020-08-21 23:57:27,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:57:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2020-08-21 23:57:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4198. [2020-08-21 23:57:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2020-08-21 23:57:27,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5326 transitions. [2020-08-21 23:57:27,855 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5326 transitions. Word has length 249 [2020-08-21 23:57:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:27,855 INFO L479 AbstractCegarLoop]: Abstraction has 4198 states and 5326 transitions. [2020-08-21 23:57:27,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:57:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5326 transitions. [2020-08-21 23:57:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-21 23:57:27,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:27,862 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 23:57:27,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 23:57:27,863 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2111585836, now seen corresponding path program 1 times [2020-08-21 23:57:27,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:27,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791873333] [2020-08-21 23:57:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:27,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:27,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:27,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:27,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:27,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:27,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:27,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:27,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:27,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:57:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 23:57:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-21 23:57:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-21 23:57:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-21 23:57:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:28,211 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 23:57:28,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791873333] [2020-08-21 23:57:28,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:28,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 23:57:28,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013023579] [2020-08-21 23:57:28,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 23:57:28,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 23:57:28,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:57:28,214 INFO L87 Difference]: Start difference. First operand 4198 states and 5326 transitions. Second operand 13 states. [2020-08-21 23:57:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:31,833 INFO L93 Difference]: Finished difference Result 11304 states and 15162 transitions. [2020-08-21 23:57:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 23:57:31,834 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2020-08-21 23:57:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:31,881 INFO L225 Difference]: With dead ends: 11304 [2020-08-21 23:57:31,882 INFO L226 Difference]: Without dead ends: 5377 [2020-08-21 23:57:31,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2020-08-21 23:57:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2020-08-21 23:57:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4715. [2020-08-21 23:57:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4715 states. [2020-08-21 23:57:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 5844 transitions. [2020-08-21 23:57:32,711 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 5844 transitions. Word has length 192 [2020-08-21 23:57:32,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:32,712 INFO L479 AbstractCegarLoop]: Abstraction has 4715 states and 5844 transitions. [2020-08-21 23:57:32,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 23:57:32,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 5844 transitions. [2020-08-21 23:57:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-08-21 23:57:32,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:32,727 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, 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] [2020-08-21 23:57:32,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 23:57:32,727 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:32,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:32,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1676255660, now seen corresponding path program 1 times [2020-08-21 23:57:32,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:32,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973084956] [2020-08-21 23:57:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 23:57:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 23:57:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:32,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 23:57:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-21 23:57:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-21 23:57:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:33,317 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 23:57:33,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973084956] [2020-08-21 23:57:33,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:33,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 23:57:33,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958404950] [2020-08-21 23:57:33,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 23:57:33,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:33,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 23:57:33,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 23:57:33,321 INFO L87 Difference]: Start difference. First operand 4715 states and 5844 transitions. Second operand 9 states. [2020-08-21 23:57:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:36,136 INFO L93 Difference]: Finished difference Result 9794 states and 12543 transitions. [2020-08-21 23:57:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 23:57:36,136 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 212 [2020-08-21 23:57:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:36,189 INFO L225 Difference]: With dead ends: 9794 [2020-08-21 23:57:36,189 INFO L226 Difference]: Without dead ends: 5101 [2020-08-21 23:57:36,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-08-21 23:57:36,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2020-08-21 23:57:36,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 4723. [2020-08-21 23:57:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4723 states. [2020-08-21 23:57:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 5800 transitions. [2020-08-21 23:57:36,774 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 5800 transitions. Word has length 212 [2020-08-21 23:57:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:36,774 INFO L479 AbstractCegarLoop]: Abstraction has 4723 states and 5800 transitions. [2020-08-21 23:57:36,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 23:57:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 5800 transitions. [2020-08-21 23:57:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-08-21 23:57:36,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:36,782 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] [2020-08-21 23:57:36,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 23:57:36,783 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:36,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1451826661, now seen corresponding path program 1 times [2020-08-21 23:57:36,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:36,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937509566] [2020-08-21 23:57:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:57:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-21 23:57:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:36,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-21 23:57:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:37,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-21 23:57:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:37,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:37,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:37,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:37,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:37,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:37,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-21 23:57:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:37,057 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 23:57:37,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937509566] [2020-08-21 23:57:37,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:37,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:57:37,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114211758] [2020-08-21 23:57:37,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:57:37,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:37,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:57:37,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:57:37,061 INFO L87 Difference]: Start difference. First operand 4723 states and 5800 transitions. Second operand 11 states. [2020-08-21 23:57:37,473 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-21 23:57:40,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:40,512 INFO L93 Difference]: Finished difference Result 14278 states and 19378 transitions. [2020-08-21 23:57:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 23:57:40,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 212 [2020-08-21 23:57:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:40,561 INFO L225 Difference]: With dead ends: 14278 [2020-08-21 23:57:40,561 INFO L226 Difference]: Without dead ends: 9577 [2020-08-21 23:57:40,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-08-21 23:57:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9577 states. [2020-08-21 23:57:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9577 to 8707. [2020-08-21 23:57:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8707 states. [2020-08-21 23:57:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8707 states to 8707 states and 10918 transitions. [2020-08-21 23:57:41,488 INFO L78 Accepts]: Start accepts. Automaton has 8707 states and 10918 transitions. Word has length 212 [2020-08-21 23:57:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:41,489 INFO L479 AbstractCegarLoop]: Abstraction has 8707 states and 10918 transitions. [2020-08-21 23:57:41,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:57:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 8707 states and 10918 transitions. [2020-08-21 23:57:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-21 23:57:41,501 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:41,502 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, 1] [2020-08-21 23:57:41,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 23:57:41,502 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1201228700, now seen corresponding path program 1 times [2020-08-21 23:57:41,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:41,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908544166] [2020-08-21 23:57:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 23:57:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-21 23:57:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-21 23:57:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-21 23:57:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-21 23:57:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-21 23:57:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-08-21 23:57:41,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908544166] [2020-08-21 23:57:41,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:41,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 23:57:41,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565554753] [2020-08-21 23:57:41,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 23:57:41,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:41,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 23:57:41,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 23:57:41,804 INFO L87 Difference]: Start difference. First operand 8707 states and 10918 transitions. Second operand 11 states. [2020-08-21 23:57:45,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:57:45,640 INFO L93 Difference]: Finished difference Result 24719 states and 32887 transitions. [2020-08-21 23:57:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 23:57:45,641 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 220 [2020-08-21 23:57:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:57:45,729 INFO L225 Difference]: With dead ends: 24719 [2020-08-21 23:57:45,729 INFO L226 Difference]: Without dead ends: 16040 [2020-08-21 23:57:45,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-08-21 23:57:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16040 states. [2020-08-21 23:57:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16040 to 15546. [2020-08-21 23:57:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15546 states. [2020-08-21 23:57:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 19508 transitions. [2020-08-21 23:57:47,014 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 19508 transitions. Word has length 220 [2020-08-21 23:57:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:57:47,015 INFO L479 AbstractCegarLoop]: Abstraction has 15546 states and 19508 transitions. [2020-08-21 23:57:47,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 23:57:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 19508 transitions. [2020-08-21 23:57:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-21 23:57:47,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:57:47,032 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:57:47,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 23:57:47,032 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:57:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:57:47,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1963777708, now seen corresponding path program 1 times [2020-08-21 23:57:47,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:57:47,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378676228] [2020-08-21 23:57:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:57:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 23:57:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 23:57:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-21 23:57:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 23:57:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 23:57:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 23:57:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 23:57:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 23:57:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 23:57:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-21 23:57:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-21 23:57:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 23:57:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-21 23:57:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 23:57:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:57:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:57:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 23:57:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:57:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-21 23:57:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:57:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 29 proven. 20 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-08-21 23:57:47,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378676228] [2020-08-21 23:57:47,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:57:47,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 23:57:47,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802365747] [2020-08-21 23:57:47,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 23:57:47,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:57:47,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 23:57:47,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-21 23:57:47,412 INFO L87 Difference]: Start difference. First operand 15546 states and 19508 transitions. Second operand 18 states. [2020-08-21 23:57:48,849 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 57