/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:02:29,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:02:29,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:02:29,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:02:29,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:02:29,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:02:29,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:02:29,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:02:29,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:02:29,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:02:29,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:02:29,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:02:29,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:02:29,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:02:29,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:02:30,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:02:30,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:02:30,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:02:30,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:02:30,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:02:30,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:02:30,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:02:30,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:02:30,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:02:30,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:02:30,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:02:30,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:02:30,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:02:30,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 18:02:30,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:02:30,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:02:30,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:02:30,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:02:30,084 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:02:30,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:02:30,085 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:02:30,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:02:30,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:02:30,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:02:30,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:02:30,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:02:30,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:02:30,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:02:30,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:02:30,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:02:30,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:02:30,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:02:30,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:02:30,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:02:30,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:02:30,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:02:30,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:02:30,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:02:30,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:02:30,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:02:30,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:02:30,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:02:30,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:02:30,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:02:30,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:02:30,409 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:02:30,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:02:30,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:02:30,414 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:02:30,415 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 18:02:30,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc596354f/6ee20cffa642497ca1efd9771328d822/FLAGca1691ae4 [2020-08-18 18:02:30,943 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:02:30,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2020-08-18 18:02:30,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc596354f/6ee20cffa642497ca1efd9771328d822/FLAGca1691ae4 [2020-08-18 18:02:31,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc596354f/6ee20cffa642497ca1efd9771328d822 [2020-08-18 18:02:31,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:02:31,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:02:31,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:31,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:02:31,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:02:31,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:31" (1/1) ... [2020-08-18 18:02:31,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78523b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31, skipping insertion in model container [2020-08-18 18:02:31,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:31" (1/1) ... [2020-08-18 18:02:31,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:02:31,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:02:31,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:31,597 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:02:31,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:31,649 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:02:31,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31 WrapperNode [2020-08-18 18:02:31,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:31,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:02:31,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:02:31,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:02:31,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31" (1/1) ... [2020-08-18 18:02:31,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31" (1/1) ... [2020-08-18 18:02:31,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31" (1/1) ... [2020-08-18 18:02:31,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31" (1/1) ... [2020-08-18 18:02:31,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31" (1/1) ... [2020-08-18 18:02:31,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31" (1/1) ... [2020-08-18 18:02:31,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31" (1/1) ... [2020-08-18 18:02:31,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:02:31,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:02:31,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:02:31,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:02:31,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:02:31,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:02:31,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:02:31,837 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-08-18 18:02:31,837 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-08-18 18:02:31,837 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-08-18 18:02:31,837 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-08-18 18:02:31,838 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-08-18 18:02:31,838 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-08-18 18:02:31,838 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-08-18 18:02:31,838 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-08-18 18:02:31,838 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 18:02:31,839 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-08-18 18:02:31,839 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-08-18 18:02:31,839 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-08-18 18:02:31,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:02:31,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:02:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:02:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-08-18 18:02:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-08-18 18:02:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-08-18 18:02:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-08-18 18:02:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-08-18 18:02:31,840 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-08-18 18:02:31,841 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-08-18 18:02:31,841 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-08-18 18:02:31,841 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 18:02:31,841 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-08-18 18:02:31,841 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-08-18 18:02:31,841 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-08-18 18:02:31,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:02:31,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:02:31,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:02:32,237 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:02:32,237 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-18 18:02:32,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:32 BoogieIcfgContainer [2020-08-18 18:02:32,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:02:32,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:02:32,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:02:32,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:02:32,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:02:31" (1/3) ... [2020-08-18 18:02:32,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f179e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:32, skipping insertion in model container [2020-08-18 18:02:32,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:31" (2/3) ... [2020-08-18 18:02:32,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f179e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:32, skipping insertion in model container [2020-08-18 18:02:32,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:32" (3/3) ... [2020-08-18 18:02:32,251 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2020-08-18 18:02:32,262 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:02:32,274 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:02:32,288 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:02:32,316 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:02:32,316 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:02:32,316 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:02:32,316 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:02:32,316 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:02:32,317 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:02:32,317 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:02:32,317 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:02:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2020-08-18 18:02:32,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 18:02:32,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:32,351 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] [2020-08-18 18:02:32,352 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:32,357 INFO L82 PathProgramCache]: Analyzing trace with hash 800633075, now seen corresponding path program 1 times [2020-08-18 18:02:32,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:32,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934830881] [2020-08-18 18:02:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:32,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:32,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:32,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:32,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:32,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 18:02:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:32,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:32,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:32,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934830881] [2020-08-18 18:02:32,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:32,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:02:32,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381597730] [2020-08-18 18:02:32,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:02:32,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:32,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:02:32,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:02:32,919 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 6 states. [2020-08-18 18:02:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:34,027 INFO L93 Difference]: Finished difference Result 356 states and 554 transitions. [2020-08-18 18:02:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:02:34,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-08-18 18:02:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:34,046 INFO L225 Difference]: With dead ends: 356 [2020-08-18 18:02:34,046 INFO L226 Difference]: Without dead ends: 248 [2020-08-18 18:02:34,052 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 [2020-08-18 18:02:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-08-18 18:02:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-08-18 18:02:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 18:02:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 246 transitions. [2020-08-18 18:02:34,168 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 246 transitions. Word has length 65 [2020-08-18 18:02:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:34,171 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 246 transitions. [2020-08-18 18:02:34,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:02:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 246 transitions. [2020-08-18 18:02:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 18:02:34,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:34,188 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] [2020-08-18 18:02:34,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:02:34,189 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:34,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1537976919, now seen corresponding path program 1 times [2020-08-18 18:02:34,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:34,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060921210] [2020-08-18 18:02:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:34,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:34,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:34,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:34,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:34,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:02:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:34,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:34,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:34,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060921210] [2020-08-18 18:02:34,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:34,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:02:34,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89427763] [2020-08-18 18:02:34,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:02:34,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:34,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:02:34,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:02:34,456 INFO L87 Difference]: Start difference. First operand 185 states and 246 transitions. Second operand 7 states. [2020-08-18 18:02:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:35,101 INFO L93 Difference]: Finished difference Result 406 states and 562 transitions. [2020-08-18 18:02:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:02:35,104 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-08-18 18:02:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:35,109 INFO L225 Difference]: With dead ends: 406 [2020-08-18 18:02:35,110 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 18:02:35,112 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 [2020-08-18 18:02:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 18:02:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 182. [2020-08-18 18:02:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-18 18:02:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 241 transitions. [2020-08-18 18:02:35,166 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 241 transitions. Word has length 66 [2020-08-18 18:02:35,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:35,166 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 241 transitions. [2020-08-18 18:02:35,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:02:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 241 transitions. [2020-08-18 18:02:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 18:02:35,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:35,172 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] [2020-08-18 18:02:35,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:02:35,172 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:35,173 INFO L82 PathProgramCache]: Analyzing trace with hash -478173211, now seen corresponding path program 1 times [2020-08-18 18:02:35,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:35,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345339646] [2020-08-18 18:02:35,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:02:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 18:02:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:35,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345339646] [2020-08-18 18:02:35,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:35,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 18:02:35,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870064470] [2020-08-18 18:02:35,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:02:35,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:35,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:02:35,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:02:35,456 INFO L87 Difference]: Start difference. First operand 182 states and 241 transitions. Second operand 9 states. [2020-08-18 18:02:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:36,716 INFO L93 Difference]: Finished difference Result 582 states and 869 transitions. [2020-08-18 18:02:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:02:36,717 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-08-18 18:02:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:36,722 INFO L225 Difference]: With dead ends: 582 [2020-08-18 18:02:36,722 INFO L226 Difference]: Without dead ends: 417 [2020-08-18 18:02:36,724 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 [2020-08-18 18:02:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-08-18 18:02:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 336. [2020-08-18 18:02:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-08-18 18:02:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 490 transitions. [2020-08-18 18:02:36,780 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 490 transitions. Word has length 72 [2020-08-18 18:02:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:36,781 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 490 transitions. [2020-08-18 18:02:36,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:02:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 490 transitions. [2020-08-18 18:02:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 18:02:36,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:36,783 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] [2020-08-18 18:02:36,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:02:36,784 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:36,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2098500188, now seen corresponding path program 1 times [2020-08-18 18:02:36,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:36,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702956869] [2020-08-18 18:02:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:36,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:36,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:36,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:36,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:36,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:02:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:36,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 18:02:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:36,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:36,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:37,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702956869] [2020-08-18 18:02:37,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:37,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-18 18:02:37,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307626395] [2020-08-18 18:02:37,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 18:02:37,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:37,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 18:02:37,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:02:37,005 INFO L87 Difference]: Start difference. First operand 336 states and 490 transitions. Second operand 12 states. [2020-08-18 18:02:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:39,865 INFO L93 Difference]: Finished difference Result 873 states and 1358 transitions. [2020-08-18 18:02:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 18:02:39,866 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-08-18 18:02:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:39,874 INFO L225 Difference]: With dead ends: 873 [2020-08-18 18:02:39,874 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 18:02:39,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 18:02:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 18:02:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 211. [2020-08-18 18:02:39,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-08-18 18:02:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 276 transitions. [2020-08-18 18:02:39,945 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 276 transitions. Word has length 73 [2020-08-18 18:02:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:39,945 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 276 transitions. [2020-08-18 18:02:39,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 18:02:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 276 transitions. [2020-08-18 18:02:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 18:02:39,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:39,948 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] [2020-08-18 18:02:39,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:02:39,956 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash -708931582, now seen corresponding path program 1 times [2020-08-18 18:02:39,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:39,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951333799] [2020-08-18 18:02:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:02:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:40,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951333799] [2020-08-18 18:02:40,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:40,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:02:40,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755386577] [2020-08-18 18:02:40,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:02:40,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:40,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:02:40,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:02:40,169 INFO L87 Difference]: Start difference. First operand 211 states and 276 transitions. Second operand 8 states. [2020-08-18 18:02:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:41,321 INFO L93 Difference]: Finished difference Result 612 states and 874 transitions. [2020-08-18 18:02:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:02:41,322 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-18 18:02:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:41,326 INFO L225 Difference]: With dead ends: 612 [2020-08-18 18:02:41,327 INFO L226 Difference]: Without dead ends: 418 [2020-08-18 18:02:41,328 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 [2020-08-18 18:02:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-18 18:02:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 323. [2020-08-18 18:02:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-08-18 18:02:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 419 transitions. [2020-08-18 18:02:41,363 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 419 transitions. Word has length 66 [2020-08-18 18:02:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:41,364 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 419 transitions. [2020-08-18 18:02:41,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:02:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 419 transitions. [2020-08-18 18:02:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 18:02:41,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:41,365 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] [2020-08-18 18:02:41,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:02:41,365 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:41,366 INFO L82 PathProgramCache]: Analyzing trace with hash -822318239, now seen corresponding path program 1 times [2020-08-18 18:02:41,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:41,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424681336] [2020-08-18 18:02:41,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:41,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:41,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:41,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:41,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:41,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:02:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:41,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:41,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:41,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424681336] [2020-08-18 18:02:41,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:41,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 18:02:41,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668274042] [2020-08-18 18:02:41,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:02:41,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:02:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:02:41,563 INFO L87 Difference]: Start difference. First operand 323 states and 419 transitions. Second operand 9 states. [2020-08-18 18:02:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:42,419 INFO L93 Difference]: Finished difference Result 727 states and 1002 transitions. [2020-08-18 18:02:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 18:02:42,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 18:02:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:42,425 INFO L225 Difference]: With dead ends: 727 [2020-08-18 18:02:42,425 INFO L226 Difference]: Without dead ends: 421 [2020-08-18 18:02:42,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:02:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-08-18 18:02:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 341. [2020-08-18 18:02:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-08-18 18:02:42,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 437 transitions. [2020-08-18 18:02:42,482 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 437 transitions. Word has length 66 [2020-08-18 18:02:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:42,483 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 437 transitions. [2020-08-18 18:02:42,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:02:42,483 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 437 transitions. [2020-08-18 18:02:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 18:02:42,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:42,485 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] [2020-08-18 18:02:42,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:02:42,485 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:42,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1843386593, now seen corresponding path program 1 times [2020-08-18 18:02:42,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:42,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024089588] [2020-08-18 18:02:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:02:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:42,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024089588] [2020-08-18 18:02:42,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:42,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 18:02:42,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443698168] [2020-08-18 18:02:42,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:02:42,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:42,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:02:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:02:42,736 INFO L87 Difference]: Start difference. First operand 341 states and 437 transitions. Second operand 9 states. [2020-08-18 18:02:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:45,480 INFO L93 Difference]: Finished difference Result 1164 states and 1617 transitions. [2020-08-18 18:02:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 18:02:45,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 18:02:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:45,488 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 18:02:45,488 INFO L226 Difference]: Without dead ends: 840 [2020-08-18 18:02:45,491 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 [2020-08-18 18:02:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-08-18 18:02:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 643. [2020-08-18 18:02:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-08-18 18:02:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 815 transitions. [2020-08-18 18:02:45,560 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 815 transitions. Word has length 66 [2020-08-18 18:02:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:45,561 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 815 transitions. [2020-08-18 18:02:45,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:02:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 815 transitions. [2020-08-18 18:02:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 18:02:45,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:45,562 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] [2020-08-18 18:02:45,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:02:45,563 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1172255968, now seen corresponding path program 1 times [2020-08-18 18:02:45,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:45,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680950531] [2020-08-18 18:02:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:45,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:45,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:45,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:45,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:45,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:02:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:45,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:45,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:45,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680950531] [2020-08-18 18:02:45,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:45,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-18 18:02:45,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774847356] [2020-08-18 18:02:45,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 18:02:45,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:45,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 18:02:45,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:02:45,739 INFO L87 Difference]: Start difference. First operand 643 states and 815 transitions. Second operand 9 states. [2020-08-18 18:02:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:46,633 INFO L93 Difference]: Finished difference Result 1352 states and 1804 transitions. [2020-08-18 18:02:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:02:46,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 18:02:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:46,639 INFO L225 Difference]: With dead ends: 1352 [2020-08-18 18:02:46,640 INFO L226 Difference]: Without dead ends: 764 [2020-08-18 18:02:46,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:02:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2020-08-18 18:02:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 669. [2020-08-18 18:02:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-08-18 18:02:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 834 transitions. [2020-08-18 18:02:46,729 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 834 transitions. Word has length 66 [2020-08-18 18:02:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:46,729 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 834 transitions. [2020-08-18 18:02:46,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 18:02:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 834 transitions. [2020-08-18 18:02:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 18:02:46,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:46,731 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] [2020-08-18 18:02:46,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:02:46,731 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1347703966, now seen corresponding path program 1 times [2020-08-18 18:02:46,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:46,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110269509] [2020-08-18 18:02:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 18:02:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:46,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110269509] [2020-08-18 18:02:46,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:46,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 18:02:46,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132613546] [2020-08-18 18:02:46,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:02:46,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:46,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:02:46,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:02:46,882 INFO L87 Difference]: Start difference. First operand 669 states and 834 transitions. Second operand 6 states. [2020-08-18 18:02:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:47,584 INFO L93 Difference]: Finished difference Result 1262 states and 1648 transitions. [2020-08-18 18:02:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:02:47,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-08-18 18:02:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:47,592 INFO L225 Difference]: With dead ends: 1262 [2020-08-18 18:02:47,592 INFO L226 Difference]: Without dead ends: 814 [2020-08-18 18:02:47,595 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 [2020-08-18 18:02:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-08-18 18:02:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 708. [2020-08-18 18:02:47,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-18 18:02:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 908 transitions. [2020-08-18 18:02:47,679 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 908 transitions. Word has length 66 [2020-08-18 18:02:47,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:47,680 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 908 transitions. [2020-08-18 18:02:47,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:02:47,680 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 908 transitions. [2020-08-18 18:02:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 18:02:47,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:47,683 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] [2020-08-18 18:02:47,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:02:47,683 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:47,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1757954899, now seen corresponding path program 1 times [2020-08-18 18:02:47,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:47,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454429576] [2020-08-18 18:02:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 18:02:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 18:02:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 18:02:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 18:02:47,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454429576] [2020-08-18 18:02:47,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:02:47,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:02:47,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384755564] [2020-08-18 18:02:47,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:02:47,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:47,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:02:47,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:02:47,877 INFO L87 Difference]: Start difference. First operand 708 states and 908 transitions. Second operand 10 states. [2020-08-18 18:02:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:50,427 INFO L93 Difference]: Finished difference Result 2276 states and 3104 transitions. [2020-08-18 18:02:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 18:02:50,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 86 [2020-08-18 18:02:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:50,436 INFO L225 Difference]: With dead ends: 2276 [2020-08-18 18:02:50,436 INFO L226 Difference]: Without dead ends: 1165 [2020-08-18 18:02:50,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-08-18 18:02:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2020-08-18 18:02:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2020-08-18 18:02:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-08-18 18:02:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1396 transitions. [2020-08-18 18:02:50,595 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1396 transitions. Word has length 86 [2020-08-18 18:02:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:50,596 INFO L479 AbstractCegarLoop]: Abstraction has 1067 states and 1396 transitions. [2020-08-18 18:02:50,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:02:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1396 transitions. [2020-08-18 18:02:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 18:02:50,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:50,603 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] [2020-08-18 18:02:50,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:02:50,604 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:50,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:50,604 INFO L82 PathProgramCache]: Analyzing trace with hash -232030383, now seen corresponding path program 1 times [2020-08-18 18:02:50,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:50,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102694492] [2020-08-18 18:02:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:02:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:02:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 18:02:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 18:02:50,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102694492] [2020-08-18 18:02:50,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:50,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:02:50,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208137609] [2020-08-18 18:02:50,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:02:50,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:02:50,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:02:50,822 INFO L87 Difference]: Start difference. First operand 1067 states and 1396 transitions. Second operand 8 states. [2020-08-18 18:02:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:51,697 INFO L93 Difference]: Finished difference Result 1198 states and 1596 transitions. [2020-08-18 18:02:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:02:51,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2020-08-18 18:02:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:51,706 INFO L225 Difference]: With dead ends: 1198 [2020-08-18 18:02:51,706 INFO L226 Difference]: Without dead ends: 1195 [2020-08-18 18:02:51,708 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 [2020-08-18 18:02:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-08-18 18:02:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1066. [2020-08-18 18:02:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1066 states. [2020-08-18 18:02:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1375 transitions. [2020-08-18 18:02:51,820 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1375 transitions. Word has length 98 [2020-08-18 18:02:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:51,820 INFO L479 AbstractCegarLoop]: Abstraction has 1066 states and 1375 transitions. [2020-08-18 18:02:51,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:02:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1375 transitions. [2020-08-18 18:02:51,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 18:02:51,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:51,823 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] [2020-08-18 18:02:51,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:02:51,824 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:51,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:51,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1396688396, now seen corresponding path program 1 times [2020-08-18 18:02:51,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:51,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467804030] [2020-08-18 18:02:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:51,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:52,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:02:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:52,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:02:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:52,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:52,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:52,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 18:02:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:52,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:52,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-18 18:02:52,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467804030] [2020-08-18 18:02:52,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:02:52,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 18:02:52,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019824974] [2020-08-18 18:02:52,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 18:02:52,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:52,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 18:02:52,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:02:52,078 INFO L87 Difference]: Start difference. First operand 1066 states and 1375 transitions. Second operand 10 states. [2020-08-18 18:02:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:54,304 INFO L93 Difference]: Finished difference Result 2245 states and 3689 transitions. [2020-08-18 18:02:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 18:02:54,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-08-18 18:02:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:54,325 INFO L225 Difference]: With dead ends: 2245 [2020-08-18 18:02:54,326 INFO L226 Difference]: Without dead ends: 2242 [2020-08-18 18:02:54,328 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 [2020-08-18 18:02:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2020-08-18 18:02:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2020-08-18 18:02:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-08-18 18:02:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3155 transitions. [2020-08-18 18:02:54,738 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3155 transitions. Word has length 99 [2020-08-18 18:02:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:54,739 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 3155 transitions. [2020-08-18 18:02:54,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 18:02:54,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3155 transitions. [2020-08-18 18:02:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-18 18:02:54,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:54,750 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] [2020-08-18 18:02:54,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:02:54,750 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:54,751 INFO L82 PathProgramCache]: Analyzing trace with hash 83738947, now seen corresponding path program 2 times [2020-08-18 18:02:54,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:54,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829033356] [2020-08-18 18:02:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:02:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:02:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 18:02:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 18:02:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-08-18 18:02:54,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829033356] [2020-08-18 18:02:55,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:55,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:02:55,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329734548] [2020-08-18 18:02:55,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:02:55,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:02:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:02:55,002 INFO L87 Difference]: Start difference. First operand 2065 states and 3155 transitions. Second operand 7 states. [2020-08-18 18:02:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:55,863 INFO L93 Difference]: Finished difference Result 3453 states and 5580 transitions. [2020-08-18 18:02:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 18:02:55,863 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2020-08-18 18:02:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:55,876 INFO L225 Difference]: With dead ends: 3453 [2020-08-18 18:02:55,876 INFO L226 Difference]: Without dead ends: 1708 [2020-08-18 18:02:55,890 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 [2020-08-18 18:02:55,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2020-08-18 18:02:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1578. [2020-08-18 18:02:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-08-18 18:02:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2390 transitions. [2020-08-18 18:02:56,082 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2390 transitions. Word has length 125 [2020-08-18 18:02:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:56,083 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2390 transitions. [2020-08-18 18:02:56,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:02:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2390 transitions. [2020-08-18 18:02:56,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 18:02:56,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:56,089 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] [2020-08-18 18:02:56,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:02:56,089 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1612542371, now seen corresponding path program 1 times [2020-08-18 18:02:56,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:56,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538995458] [2020-08-18 18:02:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:02:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 18:02:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 18:02:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 18:02:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-08-18 18:02:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 18:02:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 18:02:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 18:02:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-18 18:02:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 18:02:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 18:02:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-08-18 18:02:56,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538995458] [2020-08-18 18:02:56,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:02:56,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:02:56,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597362801] [2020-08-18 18:02:56,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:02:56,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:56,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:02:56,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:02:56,317 INFO L87 Difference]: Start difference. First operand 1578 states and 2390 transitions. Second operand 11 states. [2020-08-18 18:02:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:58,214 INFO L93 Difference]: Finished difference Result 1974 states and 3024 transitions. [2020-08-18 18:02:58,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 18:02:58,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-08-18 18:02:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:58,217 INFO L225 Difference]: With dead ends: 1974 [2020-08-18 18:02:58,217 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:02:58,230 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 [2020-08-18 18:02:58,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:02:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:02:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:02:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:02:58,231 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2020-08-18 18:02:58,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:58,232 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:02:58,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:02:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:02:58,232 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:02:58,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:02:58,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:02:58,824 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-18 18:02:58,931 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 118 [2020-08-18 18:03:06,693 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 85 [2020-08-18 18:03:07,228 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 18:03:08,333 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 18:03:09,524 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 18:03:09,825 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2020-08-18 18:03:09,941 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 18:03:10,926 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 80 [2020-08-18 18:03:11,107 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 18:03:12,370 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 165 DAG size of output: 76 [2020-08-18 18:03:13,189 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2020-08-18 18:03:13,977 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2020-08-18 18:03:14,374 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-08-18 18:03:15,444 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 138 DAG size of output: 98 [2020-08-18 18:03:15,573 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-08-18 18:03:15,712 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-08-18 18:03:18,873 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 218 DAG size of output: 154 [2020-08-18 18:03:19,037 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-08-18 18:03:19,558 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-08-18 18:03:19,937 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-08-18 18:03:20,265 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 18:03:20,453 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 1 [2020-08-18 18:03:24,761 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-08-18 18:03:24,908 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 1 [2020-08-18 18:03:26,939 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-08-18 18:03:28,097 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 165 DAG size of output: 101