/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -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 0.1.25-5644d1e-m [2020-08-18 18:02:31,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:02:31,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:02:32,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:02:32,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:02:32,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:02:32,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:02:32,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:02:32,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:02:32,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:02:32,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:02:32,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:02:32,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:02:32,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:02:32,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:02:32,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:02:32,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:02:32,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:02:32,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:02:32,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:02:32,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:02:32,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:02:32,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:02:32,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:02:32,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:02:32,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:02:32,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:02:32,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:02:32,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:02:32,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:02:32,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:02:32,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:02:32,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:02:32,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:02:32,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:02:32,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:02:32,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:02:32,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:02:32,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:02:32,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:02:32,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:02:32,037 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 [2020-08-18 18:02:32,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:02:32,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:02:32,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:02:32,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:02:32,062 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:02:32,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:02:32,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:02:32,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:02:32,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:02:32,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:02:32,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:02:32,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:02:32,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:02:32,064 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:02:32,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:02:32,065 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:02:32,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:02:32,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:02:32,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:02:32,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:02:32,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:02:32,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:02:32,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:02:32,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:02:32,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:02:32,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:02:32,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:02:32,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:02:32,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:02:32,067 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=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:02:32,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:02:32,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:02:32,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:02:32,408 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:02:32,409 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:02:32,409 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-18 18:02:32,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4788756f9/45031ca44305488898f3223cde49f0c0/FLAGc48789156 [2020-08-18 18:02:32,942 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:02:32,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/token_ring.02.cil-2.c [2020-08-18 18:02:32,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4788756f9/45031ca44305488898f3223cde49f0c0/FLAGc48789156 [2020-08-18 18:02:33,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4788756f9/45031ca44305488898f3223cde49f0c0 [2020-08-18 18:02:33,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:02:33,309 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:02:33,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:33,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:02:33,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:02:33,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:33" (1/1) ... [2020-08-18 18:02:33,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2584cbd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33, skipping insertion in model container [2020-08-18 18:02:33,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:33" (1/1) ... [2020-08-18 18:02:33,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:02:33,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:02:33,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:33,593 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:02:33,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:33,750 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:02:33,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33 WrapperNode [2020-08-18 18:02:33,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:33,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:02:33,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:02:33,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:02:33,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33" (1/1) ... [2020-08-18 18:02:33,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33" (1/1) ... [2020-08-18 18:02:33,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33" (1/1) ... [2020-08-18 18:02:33,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33" (1/1) ... [2020-08-18 18:02:33,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33" (1/1) ... [2020-08-18 18:02:33,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33" (1/1) ... [2020-08-18 18:02:33,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33" (1/1) ... [2020-08-18 18:02:33,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:02:33,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:02:33,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:02:33,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:02:33,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33" (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 [2020-08-18 18:02:33,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:02:33,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:02:33,864 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 18:02:33,865 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-08-18 18:02:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-08-18 18:02:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-08-18 18:02:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-08-18 18:02:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-08-18 18:02:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-08-18 18:02:33,868 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-08-18 18:02:33,868 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 18:02:33,869 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 18:02:33,869 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 18:02:33,869 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-08-18 18:02:33,869 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-08-18 18:02:33,869 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-08-18 18:02:33,869 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-08-18 18:02:33,869 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-08-18 18:02:33,870 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-08-18 18:02:33,870 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 18:02:33,870 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 18:02:33,871 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 18:02:33,871 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:02:33,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:02:33,874 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 18:02:33,874 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-08-18 18:02:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-08-18 18:02:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-08-18 18:02:33,875 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-08-18 18:02:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:02:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-08-18 18:02:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-08-18 18:02:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-08-18 18:02:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-08-18 18:02:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 18:02:33,876 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 18:02:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 18:02:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-08-18 18:02:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-08-18 18:02:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-08-18 18:02:33,877 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-08-18 18:02:33,878 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-08-18 18:02:33,878 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 18:02:33,878 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 18:02:33,878 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 18:02:33,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:02:33,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:02:33,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:02:34,455 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:02:34,455 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-08-18 18:02:34,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:34 BoogieIcfgContainer [2020-08-18 18:02:34,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:02:34,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:02:34,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:02:34,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:02:34,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:02:33" (1/3) ... [2020-08-18 18:02:34,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7730468b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:34, skipping insertion in model container [2020-08-18 18:02:34,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:33" (2/3) ... [2020-08-18 18:02:34,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7730468b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:34, skipping insertion in model container [2020-08-18 18:02:34,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:34" (3/3) ... [2020-08-18 18:02:34,474 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2020-08-18 18:02:34,485 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:02:34,494 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:02:34,509 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:02:34,536 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:02:34,536 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:02:34,537 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:02:34,537 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:02:34,537 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:02:34,538 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:02:34,538 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:02:34,538 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:02:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-08-18 18:02:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:02:34,576 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:34,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:02:34,578 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash -67309704, now seen corresponding path program 1 times [2020-08-18 18:02:34,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:34,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114399431] [2020-08-18 18:02:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:35,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114399431] [2020-08-18 18:02:35,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:35,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-18 18:02:35,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063900141] [2020-08-18 18:02:35,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 18:02:35,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 18:02:35,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:02:35,393 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 14 states. [2020-08-18 18:02:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:38,312 INFO L93 Difference]: Finished difference Result 449 states and 710 transitions. [2020-08-18 18:02:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 18:02:38,313 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2020-08-18 18:02:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:38,331 INFO L225 Difference]: With dead ends: 449 [2020-08-18 18:02:38,331 INFO L226 Difference]: Without dead ends: 276 [2020-08-18 18:02:38,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2020-08-18 18:02:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-08-18 18:02:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 177. [2020-08-18 18:02:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 18:02:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 237 transitions. [2020-08-18 18:02:38,422 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 237 transitions. Word has length 92 [2020-08-18 18:02:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:38,423 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 237 transitions. [2020-08-18 18:02:38,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 18:02:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 237 transitions. [2020-08-18 18:02:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:02:38,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:38,428 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] [2020-08-18 18:02:38,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:02:38,428 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:38,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2098275908, now seen corresponding path program 1 times [2020-08-18 18:02:38,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:38,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940775320] [2020-08-18 18:02:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:38,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940775320] [2020-08-18 18:02:38,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:38,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:02:38,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525528412] [2020-08-18 18:02:38,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:02:38,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:38,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:02:38,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:02:38,657 INFO L87 Difference]: Start difference. First operand 177 states and 237 transitions. Second operand 10 states. [2020-08-18 18:02:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:40,166 INFO L93 Difference]: Finished difference Result 425 states and 610 transitions. [2020-08-18 18:02:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:02:40,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:02:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:40,172 INFO L225 Difference]: With dead ends: 425 [2020-08-18 18:02:40,172 INFO L226 Difference]: Without dead ends: 268 [2020-08-18 18:02:40,174 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 [2020-08-18 18:02:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-18 18:02:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 177. [2020-08-18 18:02:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 18:02:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 234 transitions. [2020-08-18 18:02:40,218 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 234 transitions. Word has length 92 [2020-08-18 18:02:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:40,219 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 234 transitions. [2020-08-18 18:02:40,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:02:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 234 transitions. [2020-08-18 18:02:40,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:02:40,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:40,228 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] [2020-08-18 18:02:40,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:02:40,229 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:40,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1653808840, now seen corresponding path program 1 times [2020-08-18 18:02:40,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:40,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042422764] [2020-08-18 18:02:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:40,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042422764] [2020-08-18 18:02:40,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:40,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:02:40,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776883214] [2020-08-18 18:02:40,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:02:40,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:40,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:02:40,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:02:40,544 INFO L87 Difference]: Start difference. First operand 177 states and 234 transitions. Second operand 10 states. [2020-08-18 18:02:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:42,495 INFO L93 Difference]: Finished difference Result 504 states and 747 transitions. [2020-08-18 18:02:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:02:42,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:02:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:42,502 INFO L225 Difference]: With dead ends: 504 [2020-08-18 18:02:42,502 INFO L226 Difference]: Without dead ends: 347 [2020-08-18 18:02:42,506 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 [2020-08-18 18:02:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-08-18 18:02:42,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 213. [2020-08-18 18:02:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-18 18:02:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 274 transitions. [2020-08-18 18:02:42,563 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 274 transitions. Word has length 92 [2020-08-18 18:02:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:42,563 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 274 transitions. [2020-08-18 18:02:42,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:02:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 274 transitions. [2020-08-18 18:02:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:02:42,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:42,566 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] [2020-08-18 18:02:42,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:02:42,566 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:42,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash -550041895, now seen corresponding path program 1 times [2020-08-18 18:02:42,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:42,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735388425] [2020-08-18 18:02:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:42,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735388425] [2020-08-18 18:02:42,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:42,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:02:42,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832949203] [2020-08-18 18:02:42,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:02:42,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:02:42,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:02:42,751 INFO L87 Difference]: Start difference. First operand 213 states and 274 transitions. Second operand 10 states. [2020-08-18 18:02:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:44,650 INFO L93 Difference]: Finished difference Result 586 states and 840 transitions. [2020-08-18 18:02:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:02:44,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:02:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:44,655 INFO L225 Difference]: With dead ends: 586 [2020-08-18 18:02:44,655 INFO L226 Difference]: Without dead ends: 393 [2020-08-18 18:02:44,657 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 [2020-08-18 18:02:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-08-18 18:02:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 249. [2020-08-18 18:02:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-18 18:02:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 312 transitions. [2020-08-18 18:02:44,714 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 312 transitions. Word has length 92 [2020-08-18 18:02:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:44,714 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 312 transitions. [2020-08-18 18:02:44,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:02:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 312 transitions. [2020-08-18 18:02:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:02:44,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:44,730 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] [2020-08-18 18:02:44,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:02:44,730 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1219969707, now seen corresponding path program 1 times [2020-08-18 18:02:44,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:44,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383541741] [2020-08-18 18:02:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:44,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383541741] [2020-08-18 18:02:44,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:44,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:02:44,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476993975] [2020-08-18 18:02:44,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:02:44,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:02:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:02:44,904 INFO L87 Difference]: Start difference. First operand 249 states and 312 transitions. Second operand 10 states. [2020-08-18 18:02:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:46,769 INFO L93 Difference]: Finished difference Result 663 states and 922 transitions. [2020-08-18 18:02:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:02:46,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:02:46,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:46,774 INFO L225 Difference]: With dead ends: 663 [2020-08-18 18:02:46,774 INFO L226 Difference]: Without dead ends: 434 [2020-08-18 18:02:46,776 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 [2020-08-18 18:02:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-08-18 18:02:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 282. [2020-08-18 18:02:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-08-18 18:02:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2020-08-18 18:02:46,815 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 92 [2020-08-18 18:02:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:46,815 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2020-08-18 18:02:46,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:02:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2020-08-18 18:02:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:02:46,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:46,817 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] [2020-08-18 18:02:46,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:02:46,818 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:46,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:46,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1929357560, now seen corresponding path program 1 times [2020-08-18 18:02:46,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:46,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708486179] [2020-08-18 18:02:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:47,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708486179] [2020-08-18 18:02:47,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:47,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:02:47,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593209679] [2020-08-18 18:02:47,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:02:47,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:47,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:02:47,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:02:47,032 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand 10 states. [2020-08-18 18:02:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:48,828 INFO L93 Difference]: Finished difference Result 674 states and 877 transitions. [2020-08-18 18:02:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 18:02:48,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:02:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:48,832 INFO L225 Difference]: With dead ends: 674 [2020-08-18 18:02:48,832 INFO L226 Difference]: Without dead ends: 413 [2020-08-18 18:02:48,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:02:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-18 18:02:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 287. [2020-08-18 18:02:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-08-18 18:02:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 347 transitions. [2020-08-18 18:02:48,866 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 347 transitions. Word has length 92 [2020-08-18 18:02:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:48,866 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 347 transitions. [2020-08-18 18:02:48,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:02:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 347 transitions. [2020-08-18 18:02:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:02:48,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:48,868 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] [2020-08-18 18:02:48,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:02:48,869 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1031964282, now seen corresponding path program 1 times [2020-08-18 18:02:48,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:48,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838343834] [2020-08-18 18:02:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:48,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:48,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:48,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:48,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:49,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:49,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:49,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:49,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:49,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:49,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:49,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:49,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838343834] [2020-08-18 18:02:49,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:49,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:02:49,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236944210] [2020-08-18 18:02:49,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:02:49,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:49,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:02:49,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:02:49,088 INFO L87 Difference]: Start difference. First operand 287 states and 347 transitions. Second operand 10 states. [2020-08-18 18:02:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:51,528 INFO L93 Difference]: Finished difference Result 1068 states and 1350 transitions. [2020-08-18 18:02:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 18:02:51,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 92 [2020-08-18 18:02:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:51,537 INFO L225 Difference]: With dead ends: 1068 [2020-08-18 18:02:51,537 INFO L226 Difference]: Without dead ends: 801 [2020-08-18 18:02:51,540 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 [2020-08-18 18:02:51,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2020-08-18 18:02:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 591. [2020-08-18 18:02:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-08-18 18:02:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 707 transitions. [2020-08-18 18:02:51,639 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 707 transitions. Word has length 92 [2020-08-18 18:02:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:51,641 INFO L479 AbstractCegarLoop]: Abstraction has 591 states and 707 transitions. [2020-08-18 18:02:51,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:02:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 707 transitions. [2020-08-18 18:02:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 18:02:51,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:51,643 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] [2020-08-18 18:02:51,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:02:51,644 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:51,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1054596536, now seen corresponding path program 1 times [2020-08-18 18:02:51,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:51,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246255281] [2020-08-18 18:02:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:51,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246255281] [2020-08-18 18:02:51,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:51,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:02:51,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655614574] [2020-08-18 18:02:51,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:02:51,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:02:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:02:51,838 INFO L87 Difference]: Start difference. First operand 591 states and 707 transitions. Second operand 7 states. [2020-08-18 18:02:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:53,666 INFO L93 Difference]: Finished difference Result 2051 states and 2640 transitions. [2020-08-18 18:02:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 18:02:53,667 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-08-18 18:02:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:53,681 INFO L225 Difference]: With dead ends: 2051 [2020-08-18 18:02:53,682 INFO L226 Difference]: Without dead ends: 1481 [2020-08-18 18:02:53,685 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 [2020-08-18 18:02:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-08-18 18:02:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1207. [2020-08-18 18:02:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-08-18 18:02:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1495 transitions. [2020-08-18 18:02:53,812 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1495 transitions. Word has length 92 [2020-08-18 18:02:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:53,813 INFO L479 AbstractCegarLoop]: Abstraction has 1207 states and 1495 transitions. [2020-08-18 18:02:53,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:02:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1495 transitions. [2020-08-18 18:02:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 18:02:53,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:53,816 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] [2020-08-18 18:02:53,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:02:53,817 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1357284192, now seen corresponding path program 1 times [2020-08-18 18:02:53,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:53,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602972329] [2020-08-18 18:02:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:53,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:02:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:02:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-18 18:02:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 18:02:54,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602972329] [2020-08-18 18:02:54,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:54,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 18:02:54,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115311379] [2020-08-18 18:02:54,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:02:54,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:02:54,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:02:54,066 INFO L87 Difference]: Start difference. First operand 1207 states and 1495 transitions. Second operand 9 states. [2020-08-18 18:02:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:56,747 INFO L93 Difference]: Finished difference Result 3860 states and 4987 transitions. [2020-08-18 18:02:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 18:02:56,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2020-08-18 18:02:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:56,763 INFO L225 Difference]: With dead ends: 3860 [2020-08-18 18:02:56,763 INFO L226 Difference]: Without dead ends: 2675 [2020-08-18 18:02:56,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-08-18 18:02:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2020-08-18 18:02:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2303. [2020-08-18 18:02:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2303 states. [2020-08-18 18:02:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2940 transitions. [2020-08-18 18:02:56,990 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2940 transitions. Word has length 147 [2020-08-18 18:02:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:56,992 INFO L479 AbstractCegarLoop]: Abstraction has 2303 states and 2940 transitions. [2020-08-18 18:02:56,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:02:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2940 transitions. [2020-08-18 18:02:56,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-08-18 18:02:57,000 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:57,000 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] [2020-08-18 18:02:57,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:02:57,001 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:57,001 INFO L82 PathProgramCache]: Analyzing trace with hash 674078602, now seen corresponding path program 1 times [2020-08-18 18:02:57,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:57,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108834162] [2020-08-18 18:02:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:02:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:02:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:02:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:02:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:02:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:02:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-18 18:02:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:02:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:02:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-18 18:02:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-08-18 18:02:57,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108834162] [2020-08-18 18:02:57,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:57,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:02:57,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896052096] [2020-08-18 18:02:57,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:02:57,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:57,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:02:57,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:02:57,413 INFO L87 Difference]: Start difference. First operand 2303 states and 2940 transitions. Second operand 10 states. [2020-08-18 18:03:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:03:00,543 INFO L93 Difference]: Finished difference Result 6901 states and 9607 transitions. [2020-08-18 18:03:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 18:03:00,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 191 [2020-08-18 18:03:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:03:00,576 INFO L225 Difference]: With dead ends: 6901 [2020-08-18 18:03:00,576 INFO L226 Difference]: Without dead ends: 4625 [2020-08-18 18:03:00,591 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 [2020-08-18 18:03:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4625 states. [2020-08-18 18:03:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4625 to 4205. [2020-08-18 18:03:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4205 states. [2020-08-18 18:03:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4205 states to 4205 states and 5340 transitions. [2020-08-18 18:03:01,219 INFO L78 Accepts]: Start accepts. Automaton has 4205 states and 5340 transitions. Word has length 191 [2020-08-18 18:03:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:03:01,220 INFO L479 AbstractCegarLoop]: Abstraction has 4205 states and 5340 transitions. [2020-08-18 18:03:01,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:03:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 4205 states and 5340 transitions. [2020-08-18 18:03:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-08-18 18:03:01,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:03:01,229 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] [2020-08-18 18:03:01,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:03:01,230 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:03:01,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:03:01,230 INFO L82 PathProgramCache]: Analyzing trace with hash -635516700, now seen corresponding path program 1 times [2020-08-18 18:03:01,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:03:01,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526138494] [2020-08-18 18:03:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:03:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:03:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:03:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:03:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:03:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:03:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:03:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:03:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 18:03:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:03:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-18 18:03:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-18 18:03:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:03:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-18 18:03:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:03:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 18:03:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 18:03:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-18 18:03:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-08-18 18:03:01,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526138494] [2020-08-18 18:03:01,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:03:01,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 18:03:01,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189616486] [2020-08-18 18:03:01,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:03:01,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:03:01,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:03:01,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:03:01,660 INFO L87 Difference]: Start difference. First operand 4205 states and 5340 transitions. Second operand 10 states. [2020-08-18 18:03:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:03:03,699 INFO L93 Difference]: Finished difference Result 8766 states and 11212 transitions. [2020-08-18 18:03:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:03:03,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 249 [2020-08-18 18:03:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:03:03,732 INFO L225 Difference]: With dead ends: 8766 [2020-08-18 18:03:03,733 INFO L226 Difference]: Without dead ends: 4582 [2020-08-18 18:03:03,749 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 [2020-08-18 18:03:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2020-08-18 18:03:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4198. [2020-08-18 18:03:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2020-08-18 18:03:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5326 transitions. [2020-08-18 18:03:04,333 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5326 transitions. Word has length 249 [2020-08-18 18:03:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:03:04,334 INFO L479 AbstractCegarLoop]: Abstraction has 4198 states and 5326 transitions. [2020-08-18 18:03:04,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:03:04,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5326 transitions. [2020-08-18 18:03:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-18 18:03:04,342 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:03:04,342 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] [2020-08-18 18:03:04,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:03:04,343 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:03:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:03:04,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2111585836, now seen corresponding path program 1 times [2020-08-18 18:03:04,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:03:04,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121722186] [2020-08-18 18:03:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:03:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:03:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:03:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:03:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:03:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:03:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:03:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:03:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:03:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:03:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 18:03:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:03:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-18 18:03:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-08-18 18:03:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 18:03:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 8 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-08-18 18:03:04,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121722186] [2020-08-18 18:03:04,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:03:04,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:03:04,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103876172] [2020-08-18 18:03:04,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:03:04,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:03:04,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:03:04,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:03:04,705 INFO L87 Difference]: Start difference. First operand 4198 states and 5326 transitions. Second operand 13 states. [2020-08-18 18:03:08,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:03:08,432 INFO L93 Difference]: Finished difference Result 11304 states and 15162 transitions. [2020-08-18 18:03:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 18:03:08,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2020-08-18 18:03:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:03:08,476 INFO L225 Difference]: With dead ends: 11304 [2020-08-18 18:03:08,477 INFO L226 Difference]: Without dead ends: 5377 [2020-08-18 18:03:08,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=253, Invalid=739, Unknown=0, NotChecked=0, Total=992 [2020-08-18 18:03:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2020-08-18 18:03:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4715. [2020-08-18 18:03:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4715 states. [2020-08-18 18:03:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 5844 transitions. [2020-08-18 18:03:09,299 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 5844 transitions. Word has length 192 [2020-08-18 18:03:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:03:09,300 INFO L479 AbstractCegarLoop]: Abstraction has 4715 states and 5844 transitions. [2020-08-18 18:03:09,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:03:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 5844 transitions. [2020-08-18 18:03:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-18 18:03:09,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:03:09,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:03:09,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:03:09,316 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:03:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:03:09,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1371624313, now seen corresponding path program 1 times [2020-08-18 18:03:09,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:03:09,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520630188] [2020-08-18 18:03:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:03:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:03:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:03:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:03:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:03:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:03:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:03:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:03:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 18:03:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 18:03:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 18:03:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 18:03:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:03:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 18:03:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:03:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 18:03:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-08-18 18:03:09,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520630188] [2020-08-18 18:03:09,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:03:09,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:03:09,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757417951] [2020-08-18 18:03:09,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:03:09,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:03:09,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:03:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:03:09,750 INFO L87 Difference]: Start difference. First operand 4715 states and 5844 transitions. Second operand 10 states. [2020-08-18 18:03:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:03:12,605 INFO L93 Difference]: Finished difference Result 9794 states and 12543 transitions. [2020-08-18 18:03:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:03:12,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 219 [2020-08-18 18:03:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:03:12,635 INFO L225 Difference]: With dead ends: 9794 [2020-08-18 18:03:12,635 INFO L226 Difference]: Without dead ends: 5101 [2020-08-18 18:03:12,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-08-18 18:03:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2020-08-18 18:03:13,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 4723. [2020-08-18 18:03:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4723 states. [2020-08-18 18:03:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4723 states to 4723 states and 5800 transitions. [2020-08-18 18:03:13,233 INFO L78 Accepts]: Start accepts. Automaton has 4723 states and 5800 transitions. Word has length 219 [2020-08-18 18:03:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:03:13,234 INFO L479 AbstractCegarLoop]: Abstraction has 4723 states and 5800 transitions. [2020-08-18 18:03:13,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:03:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 4723 states and 5800 transitions. [2020-08-18 18:03:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-18 18:03:13,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:03:13,243 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:03:13,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:03:13,243 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:03:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:03:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1042203604, now seen corresponding path program 1 times [2020-08-18 18:03:13,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:03:13,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970074173] [2020-08-18 18:03:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:03:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:03:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:03:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:03:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:03:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:03:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:03:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:03:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:03:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:03:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 18:03:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 18:03:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-18 18:03:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 18:03:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:03:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-18 18:03:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-08-18 18:03:13,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970074173] [2020-08-18 18:03:13,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:03:13,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 18:03:13,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556623193] [2020-08-18 18:03:13,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:03:13,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:03:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:03:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:03:13,562 INFO L87 Difference]: Start difference. First operand 4723 states and 5800 transitions. Second operand 13 states. [2020-08-18 18:03:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:03:17,615 INFO L93 Difference]: Finished difference Result 14278 states and 19378 transitions. [2020-08-18 18:03:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 18:03:17,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 219 [2020-08-18 18:03:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:03:17,661 INFO L225 Difference]: With dead ends: 14278 [2020-08-18 18:03:17,661 INFO L226 Difference]: Without dead ends: 9577 [2020-08-18 18:03:17,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 18:03:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9577 states. [2020-08-18 18:03:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9577 to 8707. [2020-08-18 18:03:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8707 states. [2020-08-18 18:03:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8707 states to 8707 states and 10918 transitions. [2020-08-18 18:03:18,365 INFO L78 Accepts]: Start accepts. Automaton has 8707 states and 10918 transitions. Word has length 219 [2020-08-18 18:03:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:03:18,366 INFO L479 AbstractCegarLoop]: Abstraction has 8707 states and 10918 transitions. [2020-08-18 18:03:18,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:03:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 8707 states and 10918 transitions. [2020-08-18 18:03:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-18 18:03:18,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:03:18,378 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] [2020-08-18 18:03:18,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:03:18,379 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:03:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:03:18,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1201228700, now seen corresponding path program 1 times [2020-08-18 18:03:18,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:03:18,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746060690] [2020-08-18 18:03:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:03:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:03:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:03:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:03:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:03:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:03:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:03:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:03:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 18:03:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:03:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 18:03:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 18:03:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-18 18:03:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:18,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-18 18:03:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:19,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:03:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:19,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:19,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:19,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:19,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:19,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-18 18:03:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-08-18 18:03:19,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746060690] [2020-08-18 18:03:19,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:03:19,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:03:19,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715427652] [2020-08-18 18:03:19,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:03:19,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:03:19,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:03:19,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:03:19,192 INFO L87 Difference]: Start difference. First operand 8707 states and 10918 transitions. Second operand 11 states. [2020-08-18 18:03:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:03:22,616 INFO L93 Difference]: Finished difference Result 24719 states and 32887 transitions. [2020-08-18 18:03:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 18:03:22,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 220 [2020-08-18 18:03:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:03:22,698 INFO L225 Difference]: With dead ends: 24719 [2020-08-18 18:03:22,699 INFO L226 Difference]: Without dead ends: 16040 [2020-08-18 18:03:22,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-08-18 18:03:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16040 states. [2020-08-18 18:03:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16040 to 15546. [2020-08-18 18:03:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15546 states. [2020-08-18 18:03:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 19508 transitions. [2020-08-18 18:03:23,979 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 19508 transitions. Word has length 220 [2020-08-18 18:03:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:03:23,980 INFO L479 AbstractCegarLoop]: Abstraction has 15546 states and 19508 transitions. [2020-08-18 18:03:23,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:03:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 19508 transitions. [2020-08-18 18:03:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-18 18:03:23,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:03:23,997 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] [2020-08-18 18:03:23,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 18:03:23,998 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:03:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:03:23,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1963777708, now seen corresponding path program 1 times [2020-08-18 18:03:23,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:03:23,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318493644] [2020-08-18 18:03:23,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:03:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:03:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:03:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:03:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 18:03:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:03:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 18:03:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 18:03:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 18:03:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 18:03:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-18 18:03:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-18 18:03:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:03:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-18 18:03:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:03:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:03:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:03:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:03:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 18:03:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-18 18:03:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:03:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 29 proven. 20 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-08-18 18:03:24,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318493644] [2020-08-18 18:03:24,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:03:24,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 18:03:24,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673473724] [2020-08-18 18:03:24,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 18:03:24,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:03:24,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 18:03:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-08-18 18:03:24,373 INFO L87 Difference]: Start difference. First operand 15546 states and 19508 transitions. Second operand 18 states.