/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 20:43:06,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 20:43:06,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 20:43:06,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 20:43:06,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 20:43:06,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 20:43:06,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 20:43:06,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 20:43:06,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 20:43:06,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 20:43:06,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 20:43:06,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 20:43:06,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 20:43:06,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 20:43:06,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 20:43:06,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 20:43:06,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 20:43:06,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 20:43:06,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 20:43:06,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 20:43:06,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 20:43:06,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 20:43:06,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 20:43:06,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 20:43:06,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 20:43:06,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 20:43:06,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 20:43:06,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 20:43:06,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 20:43:06,064 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 20:43:06,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 20:43:06,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 20:43:06,066 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 20:43:06,067 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 20:43:06,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 20:43:06,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 20:43:06,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 20:43:06,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 20:43:06,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 20:43:06,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 20:43:06,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 20:43:06,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 20:43:06,120 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 20:43:06,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 20:43:06,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 20:43:06,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 20:43:06,124 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 20:43:06,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 20:43:06,124 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 20:43:06,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 20:43:06,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 20:43:06,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 20:43:06,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 20:43:06,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 20:43:06,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 20:43:06,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 20:43:06,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 20:43:06,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 20:43:06,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 20:43:06,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 20:43:06,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 20:43:06,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 20:43:06,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 20:43:06,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:43:06,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 20:43:06,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 20:43:06,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 20:43:06,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 20:43:06,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 20:43:06,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 20:43:06,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 20:43:06,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-08-21 20:43:06,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 20:43:06,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 20:43:06,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 20:43:06,457 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 20:43:06,457 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 20:43:06,458 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 20:43:06,544 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07780f45b/c554acc03e4a4ff59872a48756d99901/FLAGcf6b12005 [2020-08-21 20:43:07,015 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 20:43:07,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-21 20:43:07,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07780f45b/c554acc03e4a4ff59872a48756d99901/FLAGcf6b12005 [2020-08-21 20:43:07,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/07780f45b/c554acc03e4a4ff59872a48756d99901 [2020-08-21 20:43:07,374 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 20:43:07,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 20:43:07,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 20:43:07,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 20:43:07,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 20:43:07,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:43:07" (1/1) ... [2020-08-21 20:43:07,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e979d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07, skipping insertion in model container [2020-08-21 20:43:07,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 08:43:07" (1/1) ... [2020-08-21 20:43:07,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 20:43:07,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 20:43:07,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:43:07,719 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 20:43:07,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 20:43:07,768 INFO L208 MainTranslator]: Completed translation [2020-08-21 20:43:07,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07 WrapperNode [2020-08-21 20:43:07,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 20:43:07,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 20:43:07,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 20:43:07,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 20:43:07,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07" (1/1) ... [2020-08-21 20:43:07,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07" (1/1) ... [2020-08-21 20:43:07,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07" (1/1) ... [2020-08-21 20:43:07,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07" (1/1) ... [2020-08-21 20:43:07,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07" (1/1) ... [2020-08-21 20:43:07,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07" (1/1) ... [2020-08-21 20:43:07,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07" (1/1) ... [2020-08-21 20:43:07,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 20:43:07,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 20:43:07,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 20:43:07,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 20:43:07,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 20:43:07,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 20:43:07,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 20:43:07,957 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-21 20:43:07,958 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-21 20:43:07,958 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-21 20:43:07,958 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-21 20:43:07,958 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-21 20:43:07,958 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-21 20:43:07,958 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-21 20:43:07,958 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-21 20:43:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-21 20:43:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-21 20:43:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-21 20:43:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-21 20:43:07,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 20:43:07,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 20:43:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 20:43:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-21 20:43:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-21 20:43:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-21 20:43:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-21 20:43:07,960 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-21 20:43:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-21 20:43:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-21 20:43:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-21 20:43:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-21 20:43:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-21 20:43:07,961 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-21 20:43:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-21 20:43:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 20:43:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 20:43:07,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 20:43:08,356 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 20:43:08,356 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 20:43:08,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:43:08 BoogieIcfgContainer [2020-08-21 20:43:08,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 20:43:08,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 20:43:08,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 20:43:08,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 20:43:08,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 08:43:07" (1/3) ... [2020-08-21 20:43:08,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1268b4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:43:08, skipping insertion in model container [2020-08-21 20:43:08,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 08:43:07" (2/3) ... [2020-08-21 20:43:08,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1268b4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 08:43:08, skipping insertion in model container [2020-08-21 20:43:08,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 08:43:08" (3/3) ... [2020-08-21 20:43:08,383 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-21 20:43:08,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 20:43:08,412 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 20:43:08,428 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 20:43:08,463 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 20:43:08,463 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 20:43:08,463 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 20:43:08,463 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 20:43:08,464 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 20:43:08,464 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 20:43:08,464 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 20:43:08,464 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 20:43:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-21 20:43:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 20:43:08,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:08,497 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] [2020-08-21 20:43:08,497 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:08,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:08,503 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-21 20:43:08,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:08,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971049095] [2020-08-21 20:43:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:08,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:08,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:09,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:09,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:09,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 20:43:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:09,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:09,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:09,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971049095] [2020-08-21 20:43:09,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:09,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:43:09,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051503990] [2020-08-21 20:43:09,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:43:09,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:09,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:43:09,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:43:09,148 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-21 20:43:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:10,369 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-21 20:43:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:43:10,371 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-21 20:43:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:10,399 INFO L225 Difference]: With dead ends: 356 [2020-08-21 20:43:10,400 INFO L226 Difference]: Without dead ends: 248 [2020-08-21 20:43:10,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:43:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-21 20:43:10,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-21 20:43:10,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 20:43:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-21 20:43:10,498 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-21 20:43:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:10,499 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-21 20:43:10,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:43:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-21 20:43:10,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 20:43:10,505 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:10,505 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] [2020-08-21 20:43:10,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 20:43:10,506 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:10,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-21 20:43:10,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:10,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538531408] [2020-08-21 20:43:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:10,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:10,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:10,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:10,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:10,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:43:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:10,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:10,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:10,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538531408] [2020-08-21 20:43:10,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:10,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 20:43:10,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389227562] [2020-08-21 20:43:10,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 20:43:10,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:10,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 20:43:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:43:10,691 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-21 20:43:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:11,329 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-21 20:43:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:43:11,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-21 20:43:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:11,334 INFO L225 Difference]: With dead ends: 406 [2020-08-21 20:43:11,334 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 20:43:11,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:43:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 20:43:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-21 20:43:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 20:43:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-21 20:43:11,375 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-21 20:43:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:11,375 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-21 20:43:11,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 20:43:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-21 20:43:11,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 20:43:11,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:11,380 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] [2020-08-21 20:43:11,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 20:43:11,383 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:11,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:11,383 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-21 20:43:11,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:11,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011549087] [2020-08-21 20:43:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:11,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:11,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:11,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:11,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:11,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:43:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:11,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 20:43:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:11,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:11,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:11,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011549087] [2020-08-21 20:43:11,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:11,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 20:43:11,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158495380] [2020-08-21 20:43:11,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:43:11,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:11,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:43:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:43:11,701 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-21 20:43:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:12,862 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-21 20:43:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 20:43:12,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-21 20:43:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:12,871 INFO L225 Difference]: With dead ends: 582 [2020-08-21 20:43:12,871 INFO L226 Difference]: Without dead ends: 417 [2020-08-21 20:43:12,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-08-21 20:43:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-21 20:43:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-21 20:43:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-21 20:43:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-21 20:43:12,963 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-21 20:43:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:12,963 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-21 20:43:12,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:43:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-21 20:43:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 20:43:12,967 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:12,967 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] [2020-08-21 20:43:12,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 20:43:12,968 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:12,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-21 20:43:12,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:12,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385429801] [2020-08-21 20:43:12,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:13,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:13,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:13,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:13,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:13,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:43:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:13,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 20:43:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:13,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:13,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:13,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385429801] [2020-08-21 20:43:13,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:13,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-21 20:43:13,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014522439] [2020-08-21 20:43:13,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 20:43:13,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 20:43:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-21 20:43:13,233 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-21 20:43:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:16,062 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-21 20:43:16,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 20:43:16,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-21 20:43:16,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:16,069 INFO L225 Difference]: With dead ends: 873 [2020-08-21 20:43:16,069 INFO L226 Difference]: Without dead ends: 554 [2020-08-21 20:43:16,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 20:43:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-21 20:43:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-21 20:43:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-21 20:43:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-21 20:43:16,120 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-21 20:43:16,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:16,121 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-21 20:43:16,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 20:43:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-21 20:43:16,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 20:43:16,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:16,123 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] [2020-08-21 20:43:16,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 20:43:16,124 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-21 20:43:16,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:16,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454372705] [2020-08-21 20:43:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:16,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:16,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:16,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:16,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:16,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:43:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:16,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:16,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:16,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454372705] [2020-08-21 20:43:16,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:16,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 20:43:16,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063362339] [2020-08-21 20:43:16,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:43:16,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:43:16,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:43:16,330 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-21 20:43:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:17,399 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-21 20:43:17,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 20:43:17,400 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-21 20:43:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:17,404 INFO L225 Difference]: With dead ends: 612 [2020-08-21 20:43:17,404 INFO L226 Difference]: Without dead ends: 418 [2020-08-21 20:43:17,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-21 20:43:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-21 20:43:17,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-21 20:43:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-21 20:43:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-21 20:43:17,446 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-21 20:43:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:17,447 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-21 20:43:17,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:43:17,447 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-21 20:43:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 20:43:17,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:17,449 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] [2020-08-21 20:43:17,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 20:43:17,450 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:17,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:17,450 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-21 20:43:17,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:17,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764029222] [2020-08-21 20:43:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:17,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:17,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:17,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:17,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:17,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:43:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:17,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:17,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:17,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764029222] [2020-08-21 20:43:17,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:17,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 20:43:17,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40759330] [2020-08-21 20:43:17,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:43:17,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:17,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:43:17,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:43:17,645 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-21 20:43:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:18,633 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-21 20:43:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 20:43:18,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 20:43:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:18,639 INFO L225 Difference]: With dead ends: 727 [2020-08-21 20:43:18,639 INFO L226 Difference]: Without dead ends: 421 [2020-08-21 20:43:18,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-21 20:43:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-21 20:43:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-21 20:43:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-21 20:43:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-21 20:43:18,679 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-21 20:43:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:18,680 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-21 20:43:18,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:43:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-21 20:43:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 20:43:18,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:18,682 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] [2020-08-21 20:43:18,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 20:43:18,682 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:18,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:18,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-21 20:43:18,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:18,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176652881] [2020-08-21 20:43:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:18,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:18,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:18,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:18,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:18,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:43:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:18,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:18,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:18,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176652881] [2020-08-21 20:43:18,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:18,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 20:43:18,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922466398] [2020-08-21 20:43:18,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:43:18,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:18,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:43:18,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:43:18,903 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-21 20:43:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:21,595 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-21 20:43:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 20:43:21,595 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 20:43:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:21,601 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 20:43:21,602 INFO L226 Difference]: Without dead ends: 840 [2020-08-21 20:43:21,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2020-08-21 20:43:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-21 20:43:21,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-21 20:43:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-21 20:43:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-21 20:43:21,676 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-21 20:43:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:21,676 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-21 20:43:21,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:43:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-21 20:43:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 20:43:21,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:21,678 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] [2020-08-21 20:43:21,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 20:43:21,678 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-21 20:43:21,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:21,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680661696] [2020-08-21 20:43:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:21,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:21,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:21,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:21,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:21,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:43:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:21,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:21,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:21,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680661696] [2020-08-21 20:43:21,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:21,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 20:43:21,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391438772] [2020-08-21 20:43:21,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 20:43:21,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:21,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 20:43:21,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:43:21,841 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-21 20:43:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:22,693 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-21 20:43:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 20:43:22,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 20:43:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:22,701 INFO L225 Difference]: With dead ends: 1352 [2020-08-21 20:43:22,701 INFO L226 Difference]: Without dead ends: 764 [2020-08-21 20:43:22,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:43:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-21 20:43:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-21 20:43:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-21 20:43:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-21 20:43:22,828 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-21 20:43:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:22,829 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-21 20:43:22,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 20:43:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-21 20:43:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 20:43:22,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:22,831 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] [2020-08-21 20:43:22,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 20:43:22,831 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:22,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:22,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-21 20:43:22,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:22,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734431879] [2020-08-21 20:43:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:22,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:22,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:22,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:22,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:22,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 20:43:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:22,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:22,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 20:43:22,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734431879] [2020-08-21 20:43:22,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:22,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 20:43:22,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234516862] [2020-08-21 20:43:22,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 20:43:22,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:22,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 20:43:22,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 20:43:22,968 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-21 20:43:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:23,610 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-21 20:43:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:43:23,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-21 20:43:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:23,617 INFO L225 Difference]: With dead ends: 1262 [2020-08-21 20:43:23,617 INFO L226 Difference]: Without dead ends: 814 [2020-08-21 20:43:23,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-21 20:43:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-21 20:43:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-21 20:43:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-21 20:43:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-21 20:43:23,690 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-21 20:43:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:23,690 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-21 20:43:23,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 20:43:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-21 20:43:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 20:43:23,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:23,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:43:23,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 20:43:23,693 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-21 20:43:23,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:23,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304078108] [2020-08-21 20:43:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 20:43:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 20:43:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 20:43:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 20:43:23,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304078108] [2020-08-21 20:43:23,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:43:23,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 20:43:23,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901736046] [2020-08-21 20:43:23,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 20:43:23,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:23,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 20:43:23,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:43:23,884 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-21 20:43:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:26,567 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-21 20:43:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 20:43:26,567 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-21 20:43:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:26,576 INFO L225 Difference]: With dead ends: 2276 [2020-08-21 20:43:26,576 INFO L226 Difference]: Without dead ends: 1165 [2020-08-21 20:43:26,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-21 20:43:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-21 20:43:26,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-21 20:43:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-21 20:43:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-21 20:43:26,688 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-21 20:43:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:26,688 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-21 20:43:26,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 20:43:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-21 20:43:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 20:43:26,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:26,691 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 20:43:26,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 20:43:26,692 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-21 20:43:26,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:26,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061615124] [2020-08-21 20:43:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:43:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 20:43:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 20:43:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 20:43:26,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061615124] [2020-08-21 20:43:26,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:26,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 20:43:26,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329285575] [2020-08-21 20:43:26,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 20:43:26,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:26,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 20:43:26,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 20:43:26,860 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-21 20:43:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:27,726 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-21 20:43:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 20:43:27,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-21 20:43:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:27,734 INFO L225 Difference]: With dead ends: 1198 [2020-08-21 20:43:27,735 INFO L226 Difference]: Without dead ends: 1195 [2020-08-21 20:43:27,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-08-21 20:43:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-21 20:43:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-21 20:43:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-21 20:43:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-21 20:43:27,843 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-21 20:43:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:27,843 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-21 20:43:27,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 20:43:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-21 20:43:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 20:43:27,846 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:27,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:43:27,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 20:43:27,847 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-21 20:43:27,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:27,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36886366] [2020-08-21 20:43:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:27,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:27,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:27,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:27,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:28,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:43:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:28,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 20:43:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:28,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:28,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:28,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 20:43:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:28,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:28,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-21 20:43:28,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36886366] [2020-08-21 20:43:28,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:43:28,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 20:43:28,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011138521] [2020-08-21 20:43:28,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 20:43:28,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:28,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 20:43:28,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:43:28,079 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-21 20:43:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:30,177 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-21 20:43:30,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 20:43:30,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-21 20:43:30,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:30,195 INFO L225 Difference]: With dead ends: 2245 [2020-08-21 20:43:30,195 INFO L226 Difference]: Without dead ends: 2242 [2020-08-21 20:43:30,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2020-08-21 20:43:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-21 20:43:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-21 20:43:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-21 20:43:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-21 20:43:30,508 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-21 20:43:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:30,509 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-21 20:43:30,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 20:43:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-21 20:43:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-21 20:43:30,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:30,519 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 20:43:30,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 20:43:30,520 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:30,520 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-21 20:43:30,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:30,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412088703] [2020-08-21 20:43:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:43:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 20:43:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 20:43:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 20:43:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-21 20:43:30,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412088703] [2020-08-21 20:43:30,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 20:43:30,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 20:43:30,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138336780] [2020-08-21 20:43:30,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 20:43:30,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:30,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 20:43:30,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 20:43:30,746 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-21 20:43:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:31,534 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-21 20:43:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 20:43:31,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-21 20:43:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:31,549 INFO L225 Difference]: With dead ends: 3453 [2020-08-21 20:43:31,549 INFO L226 Difference]: Without dead ends: 1708 [2020-08-21 20:43:31,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 20:43:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-21 20:43:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-21 20:43:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-21 20:43:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-21 20:43:31,834 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-21 20:43:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:31,835 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-21 20:43:31,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 20:43:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-21 20:43:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-21 20:43:31,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 20:43:31,843 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-08-21 20:43:31,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 20:43:31,844 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 20:43:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 20:43:31,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-21 20:43:31,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 20:43:31,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081709002] [2020-08-21 20:43:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 20:43:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:31,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 20:43:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 20:43:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 20:43:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 20:43:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 20:43:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-21 20:43:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 20:43:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 20:43:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 20:43:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-21 20:43:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 20:43:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 20:43:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 20:43:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-21 20:43:32,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081709002] [2020-08-21 20:43:32,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 20:43:32,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 20:43:32,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903513602] [2020-08-21 20:43:32,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 20:43:32,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 20:43:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 20:43:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-21 20:43:32,151 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-21 20:43:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 20:43:33,673 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-21 20:43:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 20:43:33,673 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-21 20:43:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 20:43:33,674 INFO L225 Difference]: With dead ends: 1974 [2020-08-21 20:43:33,675 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 20:43:33,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2020-08-21 20:43:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 20:43:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 20:43:33,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 20:43:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 20:43:33,688 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-21 20:43:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 20:43:33,688 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 20:43:33,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 20:43:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 20:43:33,688 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 20:43:33,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 20:43:33,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 20:43:34,184 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-21 20:43:41,686 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 20:43:42,745 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 20:43:43,890 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 20:43:44,169 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-21 20:43:44,284 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 20:43:45,299 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-21 20:43:45,494 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 20:43:46,811 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-21 20:43:47,615 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-21 20:43:48,408 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-21 20:43:48,804 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-21 20:43:49,894 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-21 20:43:50,026 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-21 20:43:50,173 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-21 20:43:53,422 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-21 20:43:53,596 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-21 20:43:54,140 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-21 20:43:54,518 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-21 20:43:54,854 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 20:43:55,045 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-21 20:43:59,458 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-21 20:43:59,606 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-21 20:44:01,594 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-21 20:44:02,760 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 165 DAG size of output: 101 [2020-08-21 20:44:04,084 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 178 DAG size of output: 114 [2020-08-21 20:44:04,256 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-21 20:44:05,324 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 209 DAG size of output: 93 [2020-08-21 20:44:05,511 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1