/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:30:26,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:30:26,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:30:26,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:30:26,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:30:26,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:30:26,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:30:26,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:30:26,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:30:26,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:30:26,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:30:26,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:30:26,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:30:26,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:30:26,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:30:26,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:30:26,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:30:26,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:30:26,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:30:26,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:30:26,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:30:26,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:30:26,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:30:26,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:30:27,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:30:27,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:30:27,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:30:27,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:30:27,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:30:27,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:30:27,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:30:27,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:30:27,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:30:27,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:30:27,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:30:27,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:30:27,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:30:27,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:30:27,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:30:27,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:30:27,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:30:27,021 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 [2020-10-27 16:30:27,069 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:30:27,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:30:27,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:30:27,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:30:27,072 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:30:27,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:30:27,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:30:27,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:30:27,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:30:27,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:30:27,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:30:27,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:30:27,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:30:27,074 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:30:27,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:30:27,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:30:27,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:30:27,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:30:27,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:30:27,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:30:27,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:30:27,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:30:27,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:30:27,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:30:27,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:30:27,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:30:27,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:30:27,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:30:27,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:30:27,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:30:27,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:30:27,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:30:27,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:30:27,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:30:27,504 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:30:27,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label28.c [2020-10-27 16:30:27,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50d50420d/c9076949fb9e4b10acabb8a925fa0735/FLAG172089427 [2020-10-27 16:30:28,940 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:30:28,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label28.c [2020-10-27 16:30:29,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50d50420d/c9076949fb9e4b10acabb8a925fa0735/FLAG172089427 [2020-10-27 16:30:29,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50d50420d/c9076949fb9e4b10acabb8a925fa0735 [2020-10-27 16:30:29,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:30:29,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:30:29,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:30:29,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:30:29,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:30:29,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:30:29" (1/1) ... [2020-10-27 16:30:29,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478994f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:29, skipping insertion in model container [2020-10-27 16:30:29,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:30:29" (1/1) ... [2020-10-27 16:30:29,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:30:29,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:30:31,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:30:31,799 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:30:32,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:30:33,039 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:30:33,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33 WrapperNode [2020-10-27 16:30:33,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:30:33,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:30:33,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:30:33,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:30:33,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33" (1/1) ... [2020-10-27 16:30:33,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33" (1/1) ... [2020-10-27 16:30:33,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33" (1/1) ... [2020-10-27 16:30:33,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33" (1/1) ... [2020-10-27 16:30:33,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33" (1/1) ... [2020-10-27 16:30:33,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33" (1/1) ... [2020-10-27 16:30:33,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33" (1/1) ... [2020-10-27 16:30:33,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:30:33,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:30:33,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:30:33,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:30:33,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:30:33,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:30:33,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:30:33,655 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:30:33,655 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:30:33,656 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:30:33,656 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:30:33,656 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:30:33,656 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:30:33,656 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:30:33,656 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:30:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:30:33,657 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:30:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:30:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:30:33,658 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:30:33,659 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:30:33,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:30:33,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:30:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:30:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:30:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:30:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:30:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:30:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:30:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:30:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:30:33,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:30:40,553 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:30:40,553 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:30:40,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:30:40 BoogieIcfgContainer [2020-10-27 16:30:40,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:30:40,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:30:40,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:30:40,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:30:40,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:30:29" (1/3) ... [2020-10-27 16:30:40,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3721af3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:30:40, skipping insertion in model container [2020-10-27 16:30:40,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:30:33" (2/3) ... [2020-10-27 16:30:40,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3721af3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:30:40, skipping insertion in model container [2020-10-27 16:30:40,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:30:40" (3/3) ... [2020-10-27 16:30:40,566 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label28.c [2020-10-27 16:30:40,578 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:30:40,584 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:30:40,597 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:30:40,631 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:30:40,632 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:30:40,632 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:30:40,632 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:30:40,632 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:30:40,632 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:30:40,632 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:30:40,632 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:30:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-27 16:30:40,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2020-10-27 16:30:40,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:30:40,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:30:40,770 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:30:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:30:40,787 INFO L82 PathProgramCache]: Analyzing trace with hash 553834356, now seen corresponding path program 1 times [2020-10-27 16:30:40,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:30:40,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426230663] [2020-10-27 16:30:40,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:30:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:30:42,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:46,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:47,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:30:47,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1013 [2020-10-27 16:30:47,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:30:47,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5285 [2020-10-27 16:30:47,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:30:47,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 16:30:47,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:30:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1004 [2020-10-27 16:30:47,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:30:48,591 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:30:48,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:30:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:30:48,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:30:48,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:30:48,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:30:48,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:30:48,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 16:30:48,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:30:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:30:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:30:48,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:30:48,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:30:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:30:50,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426230663] [2020-10-27 16:30:50,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:30:50,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 16:30:50,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329666452] [2020-10-27 16:30:50,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:30:50,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:30:50,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:30:50,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:30:50,081 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 5 states. [2020-10-27 16:30:50,342 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:30:50,760 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 16:31:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:31:14,132 INFO L93 Difference]: Finished difference Result 4868 states and 9186 transitions. [2020-10-27 16:31:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:31:14,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 995 [2020-10-27 16:31:14,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:31:14,197 INFO L225 Difference]: With dead ends: 4868 [2020-10-27 16:31:14,197 INFO L226 Difference]: Without dead ends: 3481 [2020-10-27 16:31:14,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:31:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2020-10-27 16:31:14,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 3398. [2020-10-27 16:31:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3398 states. [2020-10-27 16:31:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 5927 transitions. [2020-10-27 16:31:14,476 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 5927 transitions. Word has length 995 [2020-10-27 16:31:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:31:14,481 INFO L481 AbstractCegarLoop]: Abstraction has 3398 states and 5927 transitions. [2020-10-27 16:31:14,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:31:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 5927 transitions. [2020-10-27 16:31:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2020-10-27 16:31:14,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:31:14,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:31:14,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:31:14,597 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:31:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:31:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash 742896282, now seen corresponding path program 1 times [2020-10-27 16:31:14,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:31:14,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593937812] [2020-10-27 16:31:14,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:31:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:14,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:17,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:19,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:19,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1024 [2020-10-27 16:31:19,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:31:19,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-27 16:31:19,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:19,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:31:19,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 16:31:19,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1001 [2020-10-27 16:31:19,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:20,858 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:31:20,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:31:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:20,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:20,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:20,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:31:20,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:20,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 16:31:20,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:31:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:31:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:31:20,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:20,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:31:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:20,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:21,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:21,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:31:21,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:21,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 16:31:21,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:21,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:31:21,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:31:21,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 16:31:21,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:31:22,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593937812] [2020-10-27 16:31:22,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:31:22,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 16:31:22,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931247763] [2020-10-27 16:31:22,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 16:31:22,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:31:22,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 16:31:22,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:31:22,391 INFO L87 Difference]: Start difference. First operand 3398 states and 5927 transitions. Second operand 6 states. [2020-10-27 16:31:22,605 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 16:31:22,931 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:31:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:31:47,429 INFO L93 Difference]: Finished difference Result 13047 states and 23332 transitions. [2020-10-27 16:31:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 16:31:47,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1004 [2020-10-27 16:31:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:31:47,499 INFO L225 Difference]: With dead ends: 13047 [2020-10-27 16:31:47,499 INFO L226 Difference]: Without dead ends: 9655 [2020-10-27 16:31:47,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:31:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9655 states. [2020-10-27 16:31:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9655 to 9615. [2020-10-27 16:31:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9615 states. [2020-10-27 16:31:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9615 states to 9615 states and 15722 transitions. [2020-10-27 16:31:47,846 INFO L78 Accepts]: Start accepts. Automaton has 9615 states and 15722 transitions. Word has length 1004 [2020-10-27 16:31:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:31:47,848 INFO L481 AbstractCegarLoop]: Abstraction has 9615 states and 15722 transitions. [2020-10-27 16:31:47,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 16:31:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 9615 states and 15722 transitions. [2020-10-27 16:31:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1020 [2020-10-27 16:31:47,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:31:47,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:31:47,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:31:47,917 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:31:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:31:47,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1432188098, now seen corresponding path program 1 times [2020-10-27 16:31:47,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:31:47,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312743159] [2020-10-27 16:31:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:31:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:48,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:48,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:53,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:53,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1041 [2020-10-27 16:31:53,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:31:53,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5230 [2020-10-27 16:31:53,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:31:53,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 16:31:53,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:31:53,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:54,040 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:31:54,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:31:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:54,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:54,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:54,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:31:54,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:54,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 16:31:54,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:31:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:31:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:31:54,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:54,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:31:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:54,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:54,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:54,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:31:54,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:54,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 16:31:54,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:31:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:31:54,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:31:54,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:54,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-27 16:31:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:31:54,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:31:54,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:31:54,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 16:31:54,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:31:54,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 16:31:54,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:31:54,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:31:54,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:31:54,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:31:54,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:31:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 16:31:54,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312743159] [2020-10-27 16:31:54,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:31:54,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:31:54,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095435343] [2020-10-27 16:31:54,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:31:54,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:31:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:31:54,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:31:54,902 INFO L87 Difference]: Start difference. First operand 9615 states and 15722 transitions. Second operand 7 states. [2020-10-27 16:31:55,230 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:31:55,827 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:32:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:32:16,320 INFO L93 Difference]: Finished difference Result 22781 states and 39255 transitions. [2020-10-27 16:32:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 16:32:16,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1019 [2020-10-27 16:32:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:32:16,400 INFO L225 Difference]: With dead ends: 22781 [2020-10-27 16:32:16,401 INFO L226 Difference]: Without dead ends: 13172 [2020-10-27 16:32:16,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 16:32:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13172 states. [2020-10-27 16:32:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13172 to 12946. [2020-10-27 16:32:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12946 states. [2020-10-27 16:32:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12946 states to 12946 states and 20755 transitions. [2020-10-27 16:32:16,927 INFO L78 Accepts]: Start accepts. Automaton has 12946 states and 20755 transitions. Word has length 1019 [2020-10-27 16:32:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:32:16,928 INFO L481 AbstractCegarLoop]: Abstraction has 12946 states and 20755 transitions. [2020-10-27 16:32:16,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:32:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 12946 states and 20755 transitions. [2020-10-27 16:32:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2020-10-27 16:32:16,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:32:16,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:32:16,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:32:16,979 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:32:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:32:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1461813940, now seen corresponding path program 1 times [2020-10-27 16:32:16,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:32:16,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118019954] [2020-10-27 16:32:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:32:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:17,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:17,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:17,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:22,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:22,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1054 [2020-10-27 16:32:22,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:32:22,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5164 [2020-10-27 16:32:22,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:22,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:32:22,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 16:32:22,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:32:22,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:22,688 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:32:22,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:32:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:22,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:22,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:32:22,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:22,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 16:32:22,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:22,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:32:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:32:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:32:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 16:32:22,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:32:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:22,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:22,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:22,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:32:22,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:22,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 16:32:22,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:22,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:32:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:32:22,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:32:22,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:22,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 16:32:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:22,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:22,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:22,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 16:32:22,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 16:32:22,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:32:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:32:22,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 16:32:22,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:22,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 16:32:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:22,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:22,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:22,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 16:32:22,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:22,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 16:32:22,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:22,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:32:22,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:32:22,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:32:22,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 16:32:23,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118019954] [2020-10-27 16:32:23,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:32:23,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 16:32:23,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703507424] [2020-10-27 16:32:23,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 16:32:23,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:32:23,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 16:32:23,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 16:32:23,621 INFO L87 Difference]: Start difference. First operand 12946 states and 20755 transitions. Second operand 8 states. [2020-10-27 16:32:23,853 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:32:24,606 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 16:32:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:32:42,553 INFO L93 Difference]: Finished difference Result 29344 states and 47962 transitions. [2020-10-27 16:32:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 16:32:42,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1030 [2020-10-27 16:32:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:32:42,625 INFO L225 Difference]: With dead ends: 29344 [2020-10-27 16:32:42,626 INFO L226 Difference]: Without dead ends: 16404 [2020-10-27 16:32:42,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 16:32:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16404 states. [2020-10-27 16:32:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16404 to 16272. [2020-10-27 16:32:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16272 states. [2020-10-27 16:32:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16272 states to 16272 states and 25936 transitions. [2020-10-27 16:32:43,293 INFO L78 Accepts]: Start accepts. Automaton has 16272 states and 25936 transitions. Word has length 1030 [2020-10-27 16:32:43,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:32:43,294 INFO L481 AbstractCegarLoop]: Abstraction has 16272 states and 25936 transitions. [2020-10-27 16:32:43,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 16:32:43,294 INFO L276 IsEmpty]: Start isEmpty. Operand 16272 states and 25936 transitions. [2020-10-27 16:32:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2020-10-27 16:32:43,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:32:43,358 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:32:43,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 16:32:43,358 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:32:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:32:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash -190683368, now seen corresponding path program 1 times [2020-10-27 16:32:43,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:32:43,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949512423] [2020-10-27 16:32:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:32:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:43,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:43,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:48,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:48,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1055 [2020-10-27 16:32:48,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:32:48,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 16:32:48,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:32:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 16:32:48,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:32:48,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:48,816 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:32:48,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:32:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:48,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:48,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:32:48,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:48,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 16:32:48,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:48,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:32:48,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:32:48,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:32:48,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:48,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:32:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:32:48,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:32:48,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:32:48,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 16:32:48,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:32:48,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 16:32:48,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:32:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:32:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 16:32:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:32:48,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:32:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:32:49,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949512423] [2020-10-27 16:32:49,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:32:49,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 16:32:49,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498064901] [2020-10-27 16:32:49,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:32:49,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:32:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:32:49,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:32:49,550 INFO L87 Difference]: Start difference. First operand 16272 states and 25936 transitions. Second operand 5 states. [2020-10-27 16:32:49,755 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:33:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:33:08,445 INFO L93 Difference]: Finished difference Result 48241 states and 78609 transitions. [2020-10-27 16:33:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:33:08,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1035 [2020-10-27 16:33:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:33:08,565 INFO L225 Difference]: With dead ends: 48241 [2020-10-27 16:33:08,565 INFO L226 Difference]: Without dead ends: 31975 [2020-10-27 16:33:08,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:33:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31975 states. [2020-10-27 16:33:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31975 to 31969. [2020-10-27 16:33:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31969 states. [2020-10-27 16:33:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31969 states to 31969 states and 52547 transitions. [2020-10-27 16:33:09,676 INFO L78 Accepts]: Start accepts. Automaton has 31969 states and 52547 transitions. Word has length 1035 [2020-10-27 16:33:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:33:09,677 INFO L481 AbstractCegarLoop]: Abstraction has 31969 states and 52547 transitions. [2020-10-27 16:33:09,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:33:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 31969 states and 52547 transitions. [2020-10-27 16:33:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2020-10-27 16:33:09,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:33:09,756 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:33:09,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 16:33:09,757 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:33:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:33:09,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1927276190, now seen corresponding path program 1 times [2020-10-27 16:33:09,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:33:09,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841775069] [2020-10-27 16:33:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:33:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:09,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:09,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:10,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:14,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:14,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1062 [2020-10-27 16:33:14,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:33:14,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 16:33:14,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:14,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:33:14,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 16:33:14,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 16:33:14,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:15,359 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:33:15,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:33:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:15,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:15,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:15,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:33:15,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:15,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 16:33:15,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:15,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:33:15,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:33:15,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:33:15,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:15,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:33:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:15,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:15,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:15,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 16:33:15,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:15,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 16:33:15,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:15,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:33:15,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:33:15,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 16:33:15,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:33:15,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-27 16:33:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:15,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:15,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-27 16:33:15,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:15,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-27 16:33:15,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:33:15,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:33:15,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 16:33:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:33:15,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 16:33:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:15,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:15,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:15,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 16:33:15,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:15,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 16:33:15,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:15,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:33:15,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 16:33:15,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:33:15,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 16:33:16,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841775069] [2020-10-27 16:33:16,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:33:16,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:33:16,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114995622] [2020-10-27 16:33:16,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:33:16,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:33:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:33:16,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:33:16,349 INFO L87 Difference]: Start difference. First operand 31969 states and 52547 transitions. Second operand 7 states. [2020-10-27 16:33:16,696 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-27 16:33:17,364 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:33:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:33:40,751 INFO L93 Difference]: Finished difference Result 80779 states and 149156 transitions. [2020-10-27 16:33:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 16:33:40,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1038 [2020-10-27 16:33:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:33:41,139 INFO L225 Difference]: With dead ends: 80779 [2020-10-27 16:33:41,140 INFO L226 Difference]: Without dead ends: 48816 [2020-10-27 16:33:41,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 16:33:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48816 states. [2020-10-27 16:33:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48816 to 48223. [2020-10-27 16:33:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48223 states. [2020-10-27 16:33:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48223 states to 48223 states and 77958 transitions. [2020-10-27 16:33:43,428 INFO L78 Accepts]: Start accepts. Automaton has 48223 states and 77958 transitions. Word has length 1038 [2020-10-27 16:33:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:33:43,428 INFO L481 AbstractCegarLoop]: Abstraction has 48223 states and 77958 transitions. [2020-10-27 16:33:43,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:33:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 48223 states and 77958 transitions. [2020-10-27 16:33:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2020-10-27 16:33:43,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:33:43,541 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:33:43,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 16:33:43,541 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:33:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:33:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1447124243, now seen corresponding path program 1 times [2020-10-27 16:33:43,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:33:43,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398573459] [2020-10-27 16:33:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:33:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:45,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:46,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:48,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:48,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1060 [2020-10-27 16:33:48,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:33:48,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-27 16:33:48,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:48,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:33:48,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-27 16:33:48,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1002 [2020-10-27 16:33:48,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:49,687 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:33:49,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:33:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:49,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:49,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:49,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:33:49,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:49,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:33:49,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:49,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:33:49,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:33:49,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:33:49,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:49,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:33:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:49,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:49,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:49,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 16:33:49,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:49,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 16:33:49,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:33:49,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:33:49,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:33:49,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:49,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-27 16:33:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:49,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:49,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:49,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 16:33:49,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:33:49,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 16:33:49,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:33:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:33:49,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:33:49,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:33:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 16:33:50,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398573459] [2020-10-27 16:33:50,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:33:50,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:33:50,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859603661] [2020-10-27 16:33:50,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:33:50,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:33:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:33:50,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:33:50,709 INFO L87 Difference]: Start difference. First operand 48223 states and 77958 transitions. Second operand 5 states. [2020-10-27 16:33:51,055 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 159