/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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 -i ../../../trunk/examples/svcomp/array-industry-pattern/array_range_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:59:15,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:59:15,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:59:15,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:59:15,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:59:15,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:59:15,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:59:15,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:59:15,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:59:15,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:59:15,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:59:15,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:59:15,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:59:15,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:59:15,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:59:15,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:59:15,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:59:15,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:59:15,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:59:15,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:59:15,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:59:15,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:59:15,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:59:15,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:59:15,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:59:15,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:59:15,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:59:15,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:59:15,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:59:15,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:59:15,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:59:15,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:59:15,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:59:15,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:59:15,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:59:15,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:59:15,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:59:15,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:59:15,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:59:15,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:59:15,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:59:15,957 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 [2020-10-13 23:59:16,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:59:16,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:59:16,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:59:16,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:59:16,010 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:59:16,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:59:16,011 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:59:16,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:59:16,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:59:16,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:59:16,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:59:16,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:59:16,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:59:16,014 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:59:16,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:59:16,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:59:16,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:59:16,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:59:16,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:59:16,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:59:16,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:59:16,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:59:16,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:59:16,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:59:16,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:59:16,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:59:16,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:59:16,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:59:16,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:59:16,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:59:16,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:59:16,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:59:16,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:59:16,392 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:59:16,393 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:59:16,394 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_range_init.i [2020-10-13 23:59:16,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/710857e4c/3587cdd509984224a1616d652bbcd166/FLAG5c494ac6e [2020-10-13 23:59:17,066 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:59:17,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_range_init.i [2020-10-13 23:59:17,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/710857e4c/3587cdd509984224a1616d652bbcd166/FLAG5c494ac6e [2020-10-13 23:59:17,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/710857e4c/3587cdd509984224a1616d652bbcd166 [2020-10-13 23:59:17,408 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:59:17,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:59:17,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:59:17,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:59:17,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:59:17,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:59:17" (1/1) ... [2020-10-13 23:59:17,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23064e57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17, skipping insertion in model container [2020-10-13 23:59:17,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:59:17" (1/1) ... [2020-10-13 23:59:17,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:59:17,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:59:17,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:59:17,754 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:59:17,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:59:17,803 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:59:17,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17 WrapperNode [2020-10-13 23:59:17,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:59:17,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:59:17,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:59:17,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:59:17,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17" (1/1) ... [2020-10-13 23:59:17,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17" (1/1) ... [2020-10-13 23:59:17,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17" (1/1) ... [2020-10-13 23:59:17,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17" (1/1) ... [2020-10-13 23:59:17,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17" (1/1) ... [2020-10-13 23:59:17,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17" (1/1) ... [2020-10-13 23:59:17,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17" (1/1) ... [2020-10-13 23:59:17,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:59:17,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:59:17,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:59:17,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:59:17,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17" (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 [2020-10-13 23:59:18,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:59:18,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:59:18,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:59:18,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:59:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:59:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:59:18,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:59:18,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:59:18,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:59:18,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:59:18,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:59:18,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:59:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:59:18,275 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:59:18,275 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 23:59:18,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:59:18 BoogieIcfgContainer [2020-10-13 23:59:18,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:59:18,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:59:18,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:59:18,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:59:18,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:59:17" (1/3) ... [2020-10-13 23:59:18,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24646ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:59:18, skipping insertion in model container [2020-10-13 23:59:18,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:59:17" (2/3) ... [2020-10-13 23:59:18,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24646ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:59:18, skipping insertion in model container [2020-10-13 23:59:18,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:59:18" (3/3) ... [2020-10-13 23:59:18,291 INFO L109 eAbstractionObserver]: Analyzing ICFG array_range_init.i [2020-10-13 23:59:18,309 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:59:18,321 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:59:18,346 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:59:18,406 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:59:18,406 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:59:18,406 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:59:18,407 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:59:18,407 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:59:18,407 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:59:18,407 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:59:18,407 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:59:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 23:59:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 23:59:18,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:18,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:18,455 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash -132821438, now seen corresponding path program 1 times [2020-10-13 23:59:18,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:18,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401714127] [2020-10-13 23:59:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:18,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:18,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:18,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 23:59:18,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:18,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-13 23:59:18,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:18,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:18,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:18,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:59:18,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:18,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:59:18,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:18,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:18,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:18,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:18,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:18,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 23:59:18,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:18,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:18,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:18,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:18,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:18,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:59:18,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401714127] [2020-10-13 23:59:18,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:59:18,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:59:18,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075835844] [2020-10-13 23:59:18,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:59:18,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:18,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:59:18,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:59:18,944 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-13 23:59:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:19,059 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-10-13 23:59:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:59:19,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 23:59:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:19,074 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:59:19,075 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 23:59:19,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:59:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 23:59:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-10-13 23:59:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 23:59:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 23:59:19,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2020-10-13 23:59:19,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:19,131 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 23:59:19,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:59:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 23:59:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 23:59:19,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:19,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:19,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:59:19,133 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:19,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:19,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1305427337, now seen corresponding path program 1 times [2020-10-13 23:59:19,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:19,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511354720] [2020-10-13 23:59:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:19,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:19,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:19,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 23:59:19,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:19,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-13 23:59:19,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:19,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:59:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:59:19,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:19,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:19,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:19,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:19,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:19,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:19,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:59:19,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:19,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:19,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:19,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:19,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:19,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:59:19,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511354720] [2020-10-13 23:59:19,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:59:19,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:59:19,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164979343] [2020-10-13 23:59:19,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:59:19,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:59:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:59:19,364 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-13 23:59:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:19,483 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-13 23:59:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:59:19,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 23:59:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:19,486 INFO L225 Difference]: With dead ends: 38 [2020-10-13 23:59:19,486 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 23:59:19,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:59:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 23:59:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-10-13 23:59:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 23:59:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 23:59:19,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-10-13 23:59:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:19,497 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 23:59:19,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:59:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 23:59:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:59:19,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:19,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:19,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:59:19,500 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:19,500 INFO L82 PathProgramCache]: Analyzing trace with hash -11566460, now seen corresponding path program 1 times [2020-10-13 23:59:19,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:19,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133176469] [2020-10-13 23:59:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:19,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:19,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:19,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:19,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:19,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:59:19,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:59:19,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-13 23:59:19,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:19,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:19,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:59:19,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:19,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 23:59:19,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:19,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:19,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:19,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:19,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:19,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:59:19,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:19,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:19,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:19,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:19,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:19,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:59:19,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133176469] [2020-10-13 23:59:19,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:19,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:59:19,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848391333] [2020-10-13 23:59:19,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:59:19,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:19,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:59:19,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:59:19,985 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 23:59:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:20,124 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-13 23:59:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:59:20,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 23:59:20,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:20,127 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:59:20,127 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:59:20,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:59:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:59:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-13 23:59:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 23:59:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-13 23:59:20,136 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2020-10-13 23:59:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:20,137 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-13 23:59:20,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:59:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-13 23:59:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:59:20,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:20,138 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:20,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:59:20,139 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1933661353, now seen corresponding path program 2 times [2020-10-13 23:59:20,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:20,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683626617] [2020-10-13 23:59:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:20,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:20,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:20,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:20,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:20,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:59:20,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:59:20,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 613 [2020-10-13 23:59:20,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:20,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:59:20,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:20,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:59:20,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:20,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:20,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:20,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:20,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:20,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:59:20,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:20,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:20,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:20,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:20,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:20,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:59:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:59:20,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683626617] [2020-10-13 23:59:20,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:20,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:59:20,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326368577] [2020-10-13 23:59:20,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:59:20,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:59:20,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:59:20,875 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-13 23:59:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:21,131 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-10-13 23:59:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:59:21,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 23:59:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:21,134 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:59:21,134 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:59:21,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:59:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:59:21,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2020-10-13 23:59:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:59:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-13 23:59:21,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 19 [2020-10-13 23:59:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:21,156 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-13 23:59:21,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:59:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-13 23:59:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:59:21,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:21,157 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:21,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:59:21,157 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:21,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1736338852, now seen corresponding path program 3 times [2020-10-13 23:59:21,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:21,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512768966] [2020-10-13 23:59:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:21,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:21,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:59:21,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:59:21,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-13 23:59:21,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:21,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:21,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:59:21,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 23:59:21,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:59:21,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:21,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:21,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:21,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:21,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:21,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:59:21,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:21,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:21,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:21,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:59:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:59:21,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512768966] [2020-10-13 23:59:21,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:21,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:59:21,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807316821] [2020-10-13 23:59:21,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:59:21,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:21,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:59:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:59:21,692 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2020-10-13 23:59:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:21,864 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-10-13 23:59:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:59:21,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 23:59:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:21,867 INFO L225 Difference]: With dead ends: 65 [2020-10-13 23:59:21,868 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:59:21,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:59:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:59:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2020-10-13 23:59:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:59:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 23:59:21,878 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2020-10-13 23:59:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:21,878 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 23:59:21,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:59:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 23:59:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:59:21,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:21,880 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:21,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:59:21,881 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1572558460, now seen corresponding path program 1 times [2020-10-13 23:59:21,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:21,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301103839] [2020-10-13 23:59:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:21,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:22,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:22,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:22,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:23,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:23,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:23,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:59:23,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:59:23,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1848 [2020-10-13 23:59:23,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:23,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:23,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:59:23,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:23,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:59:23,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 23:59:23,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:23,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:23,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:23,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:23,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:23,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:23,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:23,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:23,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:23,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:59:23,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301103839] [2020-10-13 23:59:23,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:23,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:59:23,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818343027] [2020-10-13 23:59:23,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:59:23,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:23,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:59:23,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:59:23,851 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 9 states. [2020-10-13 23:59:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:24,059 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-10-13 23:59:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:59:24,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-13 23:59:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:24,061 INFO L225 Difference]: With dead ends: 86 [2020-10-13 23:59:24,061 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 23:59:24,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:59:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 23:59:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 42. [2020-10-13 23:59:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:59:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2020-10-13 23:59:24,070 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 28 [2020-10-13 23:59:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:24,071 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2020-10-13 23:59:24,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:59:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2020-10-13 23:59:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:59:24,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:24,072 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:24,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:59:24,072 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash 523214519, now seen corresponding path program 2 times [2020-10-13 23:59:24,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:24,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201013203] [2020-10-13 23:59:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:24,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:24,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:24,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:24,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:24,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:24,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:24,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:24,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:25,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:29,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:29,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:59:29,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:59:29,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:59:29,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:29,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:29,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:59:29,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:59:29,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 23:59:29,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:29,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:29,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:29,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:29,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:29,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:29,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:29,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:29,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:29,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:29,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 23:59:29,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201013203] [2020-10-13 23:59:29,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:29,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:59:29,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245229662] [2020-10-13 23:59:29,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:59:29,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:59:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:59:29,205 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 9 states. [2020-10-13 23:59:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:29,429 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2020-10-13 23:59:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:59:29,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 23:59:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:29,431 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:59:29,431 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:59:29,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:59:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:59:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 51. [2020-10-13 23:59:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:59:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-10-13 23:59:29,440 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 37 [2020-10-13 23:59:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:29,440 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-10-13 23:59:29,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:59:29,441 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-10-13 23:59:29,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:59:29,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:29,442 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:29,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:59:29,443 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:29,443 INFO L82 PathProgramCache]: Analyzing trace with hash -747219290, now seen corresponding path program 3 times [2020-10-13 23:59:29,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:29,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696961270] [2020-10-13 23:59:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:29,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:29,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:29,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:29,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:29,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:29,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:30,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:30,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:30,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:30,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:30,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:30,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:34,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:34,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:59:34,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:59:34,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:59:34,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:34,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:34,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:59:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:34,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:59:34,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:34,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:34,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:34,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:34,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:34,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:34,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:59:34,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:34,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:34,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:34,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:34,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:34,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 48 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:59:34,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696961270] [2020-10-13 23:59:34,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:34,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:59:34,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546278433] [2020-10-13 23:59:34,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:59:34,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:34,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:59:34,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:59:34,680 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 13 states. [2020-10-13 23:59:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:35,554 INFO L93 Difference]: Finished difference Result 147 states and 184 transitions. [2020-10-13 23:59:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:59:35,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-13 23:59:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:35,558 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:59:35,558 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:59:35,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:59:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:59:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 63. [2020-10-13 23:59:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:59:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-10-13 23:59:35,574 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 46 [2020-10-13 23:59:35,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:35,575 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-10-13 23:59:35,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:59:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-10-13 23:59:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:59:35,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:35,581 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:35,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:59:35,584 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1902175462, now seen corresponding path program 4 times [2020-10-13 23:59:35,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:35,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689155504] [2020-10-13 23:59:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:35,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:35,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:35,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:35,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:36,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:36,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:36,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:36,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:36,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:36,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:36,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:36,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:37,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:38,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:40,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:40,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:59:40,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:59:40,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:59:40,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:40,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:40,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:59:40,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:59:40,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:59:40,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:40,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:40,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:40,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:40,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:40,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:40,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:59:40,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:40,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:40,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:40,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:40,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:40,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:59:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 173 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 23:59:40,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689155504] [2020-10-13 23:59:40,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:40,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:59:40,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761352351] [2020-10-13 23:59:40,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:59:40,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:40,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:59:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:59:40,763 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 13 states. [2020-10-13 23:59:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:41,072 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2020-10-13 23:59:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:59:41,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-13 23:59:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:41,077 INFO L225 Difference]: With dead ends: 128 [2020-10-13 23:59:41,077 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 23:59:41,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:59:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 23:59:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-13 23:59:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 23:59:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-13 23:59:41,099 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 58 [2020-10-13 23:59:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:41,100 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-13 23:59:41,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:59:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-13 23:59:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:59:41,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:41,105 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:41,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:59:41,106 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:41,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:41,106 INFO L82 PathProgramCache]: Analyzing trace with hash 911614374, now seen corresponding path program 5 times [2020-10-13 23:59:41,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:41,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298187533] [2020-10-13 23:59:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:41,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:41,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:41,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:41,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:41,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:41,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:43,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:44,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:45,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:46,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:46,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:59:46,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 23:59:46,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:59:46,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:46,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:46,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:59:46,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:59:46,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:59:46,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:46,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:46,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:46,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:46,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:46,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:46,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:59:46,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:46,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 205 proven. 301 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-13 23:59:46,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298187533] [2020-10-13 23:59:46,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:46,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:59:46,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910341566] [2020-10-13 23:59:46,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:59:46,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:46,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:59:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:59:46,438 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 18 states. [2020-10-13 23:59:47,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:47,569 INFO L93 Difference]: Finished difference Result 191 states and 231 transitions. [2020-10-13 23:59:47,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:59:47,570 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-13 23:59:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:47,571 INFO L225 Difference]: With dead ends: 191 [2020-10-13 23:59:47,572 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 23:59:47,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:59:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 23:59:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2020-10-13 23:59:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 23:59:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2020-10-13 23:59:47,584 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 70 [2020-10-13 23:59:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:47,585 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2020-10-13 23:59:47,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:59:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2020-10-13 23:59:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 23:59:47,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:47,586 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:47,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:59:47,586 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1585977337, now seen corresponding path program 6 times [2020-10-13 23:59:47,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:47,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076497095] [2020-10-13 23:59:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:47,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:47,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:47,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:47,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:47,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:49,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:49,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:49,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:49,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:50,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:52,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:52,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:59:52,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 23:59:52,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:59:52,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:52,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:52,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:59:52,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:59:52,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:59:52,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:52,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:52,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:52,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:52,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:52,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:52,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:59:52,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:52,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:52,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:52,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:52,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:52,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 437 proven. 260 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-13 23:59:52,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076497095] [2020-10-13 23:59:52,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:52,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:59:52,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416032412] [2020-10-13 23:59:52,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:59:52,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:52,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:59:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:59:52,829 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand 18 states. [2020-10-13 23:59:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:53,175 INFO L93 Difference]: Finished difference Result 178 states and 214 transitions. [2020-10-13 23:59:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:59:53,175 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-10-13 23:59:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:53,178 INFO L225 Difference]: With dead ends: 178 [2020-10-13 23:59:53,178 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 23:59:53,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:59:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 23:59:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2020-10-13 23:59:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-13 23:59:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2020-10-13 23:59:53,191 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 85 [2020-10-13 23:59:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:53,191 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2020-10-13 23:59:53,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:59:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2020-10-13 23:59:53,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:59:53,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:53,193 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:53,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:59:53,193 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:53,194 INFO L82 PathProgramCache]: Analyzing trace with hash 769123204, now seen corresponding path program 7 times [2020-10-13 23:59:53,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:53,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6757180] [2020-10-13 23:59:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:53,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:53,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:58,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:58,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:59:58,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:59:58,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:59:58,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:58,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:58,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:59:58,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:59:58,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 23:59:58,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:58,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:59:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:58,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:58,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:59:58,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:59:58,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:59:58,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:59:58,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:59:58,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:59:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:59:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:59:58,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:59:58,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:59:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 537 proven. 610 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:59:58,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6757180] [2020-10-13 23:59:58,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:59:58,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:59:58,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58296516] [2020-10-13 23:59:58,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:59:58,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:59:58,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:59:58,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:59:58,571 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand 25 states. [2020-10-13 23:59:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:59:59,060 INFO L93 Difference]: Finished difference Result 227 states and 279 transitions. [2020-10-13 23:59:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:59:59,060 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 100 [2020-10-13 23:59:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:59:59,063 INFO L225 Difference]: With dead ends: 227 [2020-10-13 23:59:59,063 INFO L226 Difference]: Without dead ends: 216 [2020-10-13 23:59:59,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:59:59,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-13 23:59:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 126. [2020-10-13 23:59:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 23:59:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2020-10-13 23:59:59,077 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 100 [2020-10-13 23:59:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:59:59,077 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2020-10-13 23:59:59,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:59:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2020-10-13 23:59:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 23:59:59,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:59:59,079 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:59:59,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:59:59,079 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:59:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:59:59,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1108320441, now seen corresponding path program 8 times [2020-10-13 23:59:59,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:59:59,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656567537] [2020-10-13 23:59:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:59:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:59:59,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:59,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:59,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:59,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:59,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:59,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:59,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:59:59,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:00,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:00,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:00,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:00,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:03,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:03,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:04,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:04,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 00:00:04,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 00:00:04,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 00:00:04,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:04,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:04,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 00:00:04,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:00:04,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 00:00:04,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:04,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:04,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:04,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:04,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:04,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:04,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:00:04,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:04,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:04,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:04,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:04,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:04,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:00:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 953 proven. 672 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-14 00:00:04,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656567537] [2020-10-14 00:00:04,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:04,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 00:00:04,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464018347] [2020-10-14 00:00:04,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 00:00:04,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:04,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 00:00:04,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:00:04,714 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 25 states. [2020-10-14 00:00:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:07,124 INFO L93 Difference]: Finished difference Result 312 states and 385 transitions. [2020-10-14 00:00:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 00:00:07,125 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-10-14 00:00:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:07,133 INFO L225 Difference]: With dead ends: 312 [2020-10-14 00:00:07,133 INFO L226 Difference]: Without dead ends: 236 [2020-10-14 00:00:07,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2020-10-14 00:00:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-14 00:00:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 147. [2020-10-14 00:00:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 00:00:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2020-10-14 00:00:07,161 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 121 [2020-10-14 00:00:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:07,161 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2020-10-14 00:00:07,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 00:00:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2020-10-14 00:00:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 00:00:07,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:07,166 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:07,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 00:00:07,166 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:07,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:07,167 INFO L82 PathProgramCache]: Analyzing trace with hash 517604006, now seen corresponding path program 9 times [2020-10-14 00:00:07,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:07,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729048379] [2020-10-14 00:00:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:07,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:07,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:07,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:07,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:07,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:07,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:07,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:07,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:08,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:08,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:08,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:08,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:09,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:11,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:12,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:12,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 00:00:12,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 00:00:12,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 00:00:12,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:12,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 00:00:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:00:12,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 00:00:12,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:13,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:13,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:13,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:13,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:13,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:13,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:00:13,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:13,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:13,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1108 proven. 1457 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-14 00:00:13,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729048379] [2020-10-14 00:00:13,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:13,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 00:00:13,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194659848] [2020-10-14 00:00:13,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 00:00:13,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:13,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 00:00:13,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 00:00:13,092 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand 35 states. [2020-10-14 00:00:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:17,195 INFO L93 Difference]: Finished difference Result 382 states and 468 transitions. [2020-10-14 00:00:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 00:00:17,196 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 142 [2020-10-14 00:00:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:17,199 INFO L225 Difference]: With dead ends: 382 [2020-10-14 00:00:17,200 INFO L226 Difference]: Without dead ends: 306 [2020-10-14 00:00:17,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 00:00:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-14 00:00:17,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 177. [2020-10-14 00:00:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-14 00:00:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 199 transitions. [2020-10-14 00:00:17,212 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 199 transitions. Word has length 142 [2020-10-14 00:00:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:17,213 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 199 transitions. [2020-10-14 00:00:17,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 00:00:17,213 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 199 transitions. [2020-10-14 00:00:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-14 00:00:17,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:17,215 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 32, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:17,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 00:00:17,215 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:17,215 INFO L82 PathProgramCache]: Analyzing trace with hash 454267462, now seen corresponding path program 10 times [2020-10-14 00:00:17,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:17,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484728627] [2020-10-14 00:00:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:17,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:17,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:17,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:18,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:19,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:19,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:19,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:19,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:19,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:19,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:22,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:22,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-14 00:00:22,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-14 00:00:22,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 00:00:22,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:22,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:22,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 00:00:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-14 00:00:22,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-14 00:00:22,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:22,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:22,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:22,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:22,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:22,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:22,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:00:22,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:22,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:22,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:22,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:22,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:22,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 2085 proven. 1365 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-14 00:00:22,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484728627] [2020-10-14 00:00:22,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:22,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 00:00:22,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084722811] [2020-10-14 00:00:22,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 00:00:22,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:22,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 00:00:22,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 00:00:22,909 INFO L87 Difference]: Start difference. First operand 177 states and 199 transitions. Second operand 35 states. [2020-10-14 00:00:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:23,852 INFO L93 Difference]: Finished difference Result 348 states and 423 transitions. [2020-10-14 00:00:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 00:00:23,853 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 172 [2020-10-14 00:00:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:23,855 INFO L225 Difference]: With dead ends: 348 [2020-10-14 00:00:23,855 INFO L226 Difference]: Without dead ends: 337 [2020-10-14 00:00:23,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 00:00:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-10-14 00:00:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 207. [2020-10-14 00:00:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-14 00:00:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 239 transitions. [2020-10-14 00:00:23,868 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 239 transitions. Word has length 172 [2020-10-14 00:00:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:23,869 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 239 transitions. [2020-10-14 00:00:23,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 00:00:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 239 transitions. [2020-10-14 00:00:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-14 00:00:23,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:23,871 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:23,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 00:00:23,872 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash -863345114, now seen corresponding path program 11 times [2020-10-14 00:00:23,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:23,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167268142] [2020-10-14 00:00:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:24,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:24,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:24,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:24,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:24,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:24,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:24,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:25,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:25,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:25,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:25,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:25,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:25,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:25,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:25,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:26,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:26,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:26,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:26,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:26,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:27,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:28,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:28,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-14 00:00:28,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-14 00:00:28,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 00:00:28,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:28,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:28,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 00:00:28,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 00:00:28,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-14 00:00:28,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:30,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:30,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:30,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:30,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:30,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:30,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:00:30,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:30,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:30,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:30,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:30,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:30,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 2501 proven. 2926 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-14 00:00:30,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167268142] [2020-10-14 00:00:30,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:30,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 00:00:30,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895970082] [2020-10-14 00:00:30,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 00:00:30,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 00:00:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 00:00:30,180 INFO L87 Difference]: Start difference. First operand 207 states and 239 transitions. Second operand 49 states. [2020-10-14 00:00:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:31,653 INFO L93 Difference]: Finished difference Result 446 states and 553 transitions. [2020-10-14 00:00:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 00:00:31,654 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 202 [2020-10-14 00:00:31,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:31,660 INFO L225 Difference]: With dead ends: 446 [2020-10-14 00:00:31,660 INFO L226 Difference]: Without dead ends: 435 [2020-10-14 00:00:31,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 00:00:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-14 00:00:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 249. [2020-10-14 00:00:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-14 00:00:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 295 transitions. [2020-10-14 00:00:31,676 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 295 transitions. Word has length 202 [2020-10-14 00:00:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:31,677 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 295 transitions. [2020-10-14 00:00:31,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 00:00:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 295 transitions. [2020-10-14 00:00:31,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-14 00:00:31,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:31,680 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 45, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:31,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 00:00:31,681 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:31,681 INFO L82 PathProgramCache]: Analyzing trace with hash -930627898, now seen corresponding path program 12 times [2020-10-14 00:00:31,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:31,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669747595] [2020-10-14 00:00:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:31,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:32,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:33,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:33,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:33,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:34,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:34,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:34,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:34,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:35,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:35,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:36,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:36,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-14 00:00:36,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 00:00:36,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 00:00:36,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:36,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 00:00:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:00:36,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-14 00:00:36,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:38,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:38,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:38,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:38,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:38,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:38,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:00:38,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:38,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:38,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:38,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:38,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:38,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:00:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 4410 proven. 2795 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-14 00:00:38,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669747595] [2020-10-14 00:00:38,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:38,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 00:00:38,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011869244] [2020-10-14 00:00:38,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 00:00:38,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:38,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 00:00:38,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 00:00:38,401 INFO L87 Difference]: Start difference. First operand 249 states and 295 transitions. Second operand 47 states. [2020-10-14 00:00:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:00:45,877 INFO L93 Difference]: Finished difference Result 610 states and 758 transitions. [2020-10-14 00:00:45,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 00:00:45,878 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 244 [2020-10-14 00:00:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:00:45,882 INFO L225 Difference]: With dead ends: 610 [2020-10-14 00:00:45,882 INFO L226 Difference]: Without dead ends: 462 [2020-10-14 00:00:45,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 00:00:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-14 00:00:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 285. [2020-10-14 00:00:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-14 00:00:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 331 transitions. [2020-10-14 00:00:45,899 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 331 transitions. Word has length 244 [2020-10-14 00:00:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:00:45,899 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 331 transitions. [2020-10-14 00:00:45,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 00:00:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 331 transitions. [2020-10-14 00:00:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-14 00:00:45,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:00:45,903 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:00:45,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 00:00:45,904 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:00:45,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:00:45,904 INFO L82 PathProgramCache]: Analyzing trace with hash 799553926, now seen corresponding path program 13 times [2020-10-14 00:00:45,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:00:45,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004233096] [2020-10-14 00:00:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:00:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:45,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:47,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:47,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:47,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:49,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:49,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:49,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:50,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:50,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:50,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-14 00:00:50,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 00:00:50,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 00:00:50,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:50,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:50,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 00:00:50,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:00:50,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-14 00:00:50,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:53,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:00:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:00:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:00:53,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:00:53,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:00:53,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:00:53,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:00:53,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:00:53,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:00:53,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:00:53,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:00:53,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:00:53,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:00:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11837 backedges. 5742 proven. 4240 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-14 00:00:53,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004233096] [2020-10-14 00:00:53,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:00:53,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 00:00:53,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379277787] [2020-10-14 00:00:53,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 00:00:53,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:00:53,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 00:00:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 00:00:53,090 INFO L87 Difference]: Start difference. First operand 285 states and 331 transitions. Second operand 57 states. [2020-10-14 00:01:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:04,172 INFO L93 Difference]: Finished difference Result 680 states and 836 transitions. [2020-10-14 00:01:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 00:01:04,172 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 280 [2020-10-14 00:01:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:04,177 INFO L225 Difference]: With dead ends: 680 [2020-10-14 00:01:04,177 INFO L226 Difference]: Without dead ends: 532 [2020-10-14 00:01:04,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 00:01:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-14 00:01:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 315. [2020-10-14 00:01:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-14 00:01:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 361 transitions. [2020-10-14 00:01:04,195 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 361 transitions. Word has length 280 [2020-10-14 00:01:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:04,195 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 361 transitions. [2020-10-14 00:01:04,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 00:01:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 361 transitions. [2020-10-14 00:01:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-14 00:01:04,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:04,200 INFO L422 BasicCegarLoop]: trace histogram [99, 99, 54, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:04,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 00:01:04,201 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1353662170, now seen corresponding path program 14 times [2020-10-14 00:01:04,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:04,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024707448] [2020-10-14 00:01:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:04,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:09,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:09,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-14 00:01:09,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:09,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-14 00:01:09,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:09,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 00:01:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-14 00:01:09,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:11,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:11,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:11,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:11,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:11,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:11,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:11,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:11,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:11,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:11,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:11,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14652 backedges. 7325 proven. 4401 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-10-14 00:01:11,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024707448] [2020-10-14 00:01:11,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:11,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 00:01:11,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327823627] [2020-10-14 00:01:11,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 00:01:11,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:11,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 00:01:11,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 00:01:11,574 INFO L87 Difference]: Start difference. First operand 315 states and 361 transitions. Second operand 58 states. [2020-10-14 00:01:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:22,938 INFO L93 Difference]: Finished difference Result 687 states and 835 transitions. [2020-10-14 00:01:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 00:01:22,939 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 310 [2020-10-14 00:01:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:22,942 INFO L225 Difference]: With dead ends: 687 [2020-10-14 00:01:22,943 INFO L226 Difference]: Without dead ends: 539 [2020-10-14 00:01:22,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 00:01:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-10-14 00:01:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 318. [2020-10-14 00:01:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-14 00:01:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 364 transitions. [2020-10-14 00:01:22,959 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 364 transitions. Word has length 310 [2020-10-14 00:01:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:22,959 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 364 transitions. [2020-10-14 00:01:22,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 00:01:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 364 transitions. [2020-10-14 00:01:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-10-14 00:01:22,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:22,961 INFO L422 BasicCegarLoop]: trace histogram [100, 100, 55, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:22,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 00:01:22,962 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:22,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:22,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2114628679, now seen corresponding path program 15 times [2020-10-14 00:01:22,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:22,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607909341] [2020-10-14 00:01:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:23,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:23,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:24,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:24,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:24,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:25,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:25,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:25,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:25,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:26,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:26,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:27,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:28,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:28,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 321 [2020-10-14 00:01:28,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 00:01:28,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 00:01:28,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:28,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:28,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-14 00:01:28,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:28,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-14 00:01:28,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:31,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:31,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:31,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:31,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:31,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:31,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:31,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:31,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:31,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:31,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:31,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:31,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14950 backedges. 6733 proven. 6567 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-14 00:01:31,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607909341] [2020-10-14 00:01:31,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:31,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-14 00:01:31,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268823428] [2020-10-14 00:01:31,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-14 00:01:31,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:31,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-14 00:01:31,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 00:01:31,294 INFO L87 Difference]: Start difference. First operand 318 states and 364 transitions. Second operand 70 states. [2020-10-14 00:01:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:47,617 INFO L93 Difference]: Finished difference Result 771 states and 942 transitions. [2020-10-14 00:01:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-14 00:01:47,618 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 313 [2020-10-14 00:01:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:47,622 INFO L225 Difference]: With dead ends: 771 [2020-10-14 00:01:47,623 INFO L226 Difference]: Without dead ends: 623 [2020-10-14 00:01:47,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 00:01:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-10-14 00:01:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 354. [2020-10-14 00:01:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-14 00:01:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 400 transitions. [2020-10-14 00:01:47,640 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 400 transitions. Word has length 313 [2020-10-14 00:01:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:47,640 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 400 transitions. [2020-10-14 00:01:47,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-14 00:01:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 400 transitions. [2020-10-14 00:01:47,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-14 00:01:47,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:47,643 INFO L422 BasicCegarLoop]: trace histogram [112, 112, 67, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:47,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 00:01:47,643 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:47,644 INFO L82 PathProgramCache]: Analyzing trace with hash 623481081, now seen corresponding path program 16 times [2020-10-14 00:01:47,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:47,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486582094] [2020-10-14 00:01:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:47,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:47,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:50,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:50,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:52,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:52,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-14 00:01:52,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:01:52,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 00:01:52,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:52,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 00:01:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 211 [2020-10-14 00:01:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-14 00:01:52,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:54,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:54,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:54,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:54,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:54,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:54,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:54,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:54,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:54,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:54,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:54,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:54,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18760 backedges. 9133 proven. 3060 refuted. 0 times theorem prover too weak. 6567 trivial. 0 not checked. [2020-10-14 00:01:54,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486582094] [2020-10-14 00:01:54,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:54,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 00:01:54,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414140417] [2020-10-14 00:01:54,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 00:01:54,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:54,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 00:01:54,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 00:01:54,079 INFO L87 Difference]: Start difference. First operand 354 states and 400 transitions. Second operand 50 states. [2020-10-14 00:01:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:55,838 INFO L93 Difference]: Finished difference Result 558 states and 654 transitions. [2020-10-14 00:01:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 00:01:55,838 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 349 [2020-10-14 00:01:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:55,842 INFO L225 Difference]: With dead ends: 558 [2020-10-14 00:01:55,842 INFO L226 Difference]: Without dead ends: 547 [2020-10-14 00:01:55,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 00:01:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-14 00:01:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 357. [2020-10-14 00:01:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-14 00:01:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 404 transitions. [2020-10-14 00:01:55,865 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 404 transitions. Word has length 349 [2020-10-14 00:01:55,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:55,866 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 404 transitions. [2020-10-14 00:01:55,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 00:01:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 404 transitions. [2020-10-14 00:01:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-14 00:01:55,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:55,871 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 67, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:55,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 00:01:55,871 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1883247932, now seen corresponding path program 17 times [2020-10-14 00:01:55,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:55,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804824502] [2020-10-14 00:01:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:56,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:56,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:00,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:00,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:00,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:00,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:00,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:00,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 360 [2020-10-14 00:02:00,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:02:00,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 00:02:00,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:00,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:00,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 00:02:00,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-10-14 00:02:00,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-14 00:02:00,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:02,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:02,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:02,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:02,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:02,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:02,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:02,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:02,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:02,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:02,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:02,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 19097 backedges. 9525 proven. 3775 refuted. 0 times theorem prover too weak. 5797 trivial. 0 not checked. [2020-10-14 00:02:02,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804824502] [2020-10-14 00:02:02,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:02,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 00:02:02,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012282795] [2020-10-14 00:02:02,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 00:02:02,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:02,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 00:02:02,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 00:02:02,533 INFO L87 Difference]: Start difference. First operand 357 states and 404 transitions. Second operand 55 states. [2020-10-14 00:02:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:04,413 INFO L93 Difference]: Finished difference Result 593 states and 703 transitions. [2020-10-14 00:02:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 00:02:04,415 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 352 [2020-10-14 00:02:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:04,419 INFO L225 Difference]: With dead ends: 593 [2020-10-14 00:02:04,419 INFO L226 Difference]: Without dead ends: 582 [2020-10-14 00:02:04,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 00:02:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-10-14 00:02:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 372. [2020-10-14 00:02:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-14 00:02:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 424 transitions. [2020-10-14 00:02:04,434 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 424 transitions. Word has length 352 [2020-10-14 00:02:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:04,435 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 424 transitions. [2020-10-14 00:02:04,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 00:02:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 424 transitions. [2020-10-14 00:02:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-14 00:02:04,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:04,438 INFO L422 BasicCegarLoop]: trace histogram [118, 118, 67, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:04,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 00:02:04,438 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash 242008409, now seen corresponding path program 18 times [2020-10-14 00:02:04,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:04,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822971072] [2020-10-14 00:02:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:04,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:05,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:06,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:07,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:08,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:09,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:09,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-10-14 00:02:09,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:02:09,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 00:02:09,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:09,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:09,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 00:02:09,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 202 [2020-10-14 00:02:09,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-14 00:02:09,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:11,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:11,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:11,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:11,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:11,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:11,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:11,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:11,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:11,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:11,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20827 backedges. 10441 proven. 4401 refuted. 0 times theorem prover too weak. 5985 trivial. 0 not checked. [2020-10-14 00:02:11,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822971072] [2020-10-14 00:02:11,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:11,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 00:02:11,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769633303] [2020-10-14 00:02:11,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 00:02:11,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:11,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 00:02:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 00:02:11,362 INFO L87 Difference]: Start difference. First operand 372 states and 424 transitions. Second operand 59 states. [2020-10-14 00:02:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:13,645 INFO L93 Difference]: Finished difference Result 621 states and 738 transitions. [2020-10-14 00:02:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 00:02:13,646 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 367 [2020-10-14 00:02:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:13,651 INFO L225 Difference]: With dead ends: 621 [2020-10-14 00:02:13,651 INFO L226 Difference]: Without dead ends: 610 [2020-10-14 00:02:13,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 00:02:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-10-14 00:02:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 384. [2020-10-14 00:02:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-14 00:02:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 440 transitions. [2020-10-14 00:02:13,668 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 440 transitions. Word has length 367 [2020-10-14 00:02:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:13,668 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 440 transitions. [2020-10-14 00:02:13,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 00:02:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 440 transitions. [2020-10-14 00:02:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-10-14 00:02:13,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:13,671 INFO L422 BasicCegarLoop]: trace histogram [122, 122, 67, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:13,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 00:02:13,672 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:13,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:13,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1498671513, now seen corresponding path program 19 times [2020-10-14 00:02:13,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:13,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977207297] [2020-10-14 00:02:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:13,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:14,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:15,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:16,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:16,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:16,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:16,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:16,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:16,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:17,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:17,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:17,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:17,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:18,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:18,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 387 [2020-10-14 00:02:18,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 00:02:18,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 00:02:18,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:18,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:18,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-14 00:02:18,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:18,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-14 00:02:18,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:23,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:23,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:23,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:23,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:23,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:23,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:23,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:23,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:23,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:23,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:23,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:23,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 22265 backedges. 10083 proven. 9640 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-10-14 00:02:23,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977207297] [2020-10-14 00:02:23,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:23,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-14 00:02:23,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932194334] [2020-10-14 00:02:23,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-14 00:02:23,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:23,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-14 00:02:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2020-10-14 00:02:23,221 INFO L87 Difference]: Start difference. First operand 384 states and 440 transitions. Second operand 84 states. [2020-10-14 00:02:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:48,125 INFO L93 Difference]: Finished difference Result 929 states and 1136 transitions. [2020-10-14 00:02:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-14 00:02:48,126 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 379 [2020-10-14 00:02:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:48,131 INFO L225 Difference]: With dead ends: 929 [2020-10-14 00:02:48,131 INFO L226 Difference]: Without dead ends: 751 [2020-10-14 00:02:48,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2020-10-14 00:02:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-10-14 00:02:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 426. [2020-10-14 00:02:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-10-14 00:02:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 482 transitions. [2020-10-14 00:02:48,150 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 482 transitions. Word has length 379 [2020-10-14 00:02:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:48,150 INFO L479 AbstractCegarLoop]: Abstraction has 426 states and 482 transitions. [2020-10-14 00:02:48,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-14 00:02:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 482 transitions. [2020-10-14 00:02:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-10-14 00:02:48,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:48,154 INFO L422 BasicCegarLoop]: trace histogram [136, 136, 81, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:48,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 00:02:48,154 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1502824377, now seen corresponding path program 20 times [2020-10-14 00:02:48,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:48,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019101632] [2020-10-14 00:02:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:48,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:48,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:53,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 429 [2020-10-14 00:02:53,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:02:53,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-14 00:02:53,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:53,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:53,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 00:02:53,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 253 [2020-10-14 00:02:53,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-14 00:02:53,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:55,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:55,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:55,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:55,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:55,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:55,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:55,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:55,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:55,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 27676 backedges. 13471 proven. 4565 refuted. 0 times theorem prover too weak. 9640 trivial. 0 not checked. [2020-10-14 00:02:55,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019101632] [2020-10-14 00:02:55,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:55,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 00:02:55,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098887862] [2020-10-14 00:02:55,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 00:02:55,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:55,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 00:02:55,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 00:02:55,215 INFO L87 Difference]: Start difference. First operand 426 states and 482 transitions. Second operand 60 states. [2020-10-14 00:02:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:57,624 INFO L93 Difference]: Finished difference Result 670 states and 786 transitions. [2020-10-14 00:02:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 00:02:57,625 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 421 [2020-10-14 00:02:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:57,628 INFO L225 Difference]: With dead ends: 670 [2020-10-14 00:02:57,628 INFO L226 Difference]: Without dead ends: 659 [2020-10-14 00:02:57,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 00:02:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2020-10-14 00:02:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 429. [2020-10-14 00:02:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-14 00:02:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 486 transitions. [2020-10-14 00:02:57,644 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 486 transitions. Word has length 421 [2020-10-14 00:02:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:57,645 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 486 transitions. [2020-10-14 00:02:57,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 00:02:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 486 transitions. [2020-10-14 00:02:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-10-14 00:02:57,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:57,648 INFO L422 BasicCegarLoop]: trace histogram [137, 137, 81, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:57,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 00:02:57,649 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -372655100, now seen corresponding path program 21 times [2020-10-14 00:02:57,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:57,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800007586] [2020-10-14 00:02:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:57,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:58,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking...