/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:47:05,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:47:05,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:47:05,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:47:05,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:47:05,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:47:05,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:47:05,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:47:05,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:47:05,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:47:05,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:47:05,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:47:05,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:47:05,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:47:05,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:47:05,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:47:05,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:47:05,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:47:05,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:47:05,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:47:05,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:47:05,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:47:05,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:47:05,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:47:05,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 09:47:05,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 09:47:05,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 09:47:05,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 09:47:05,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 09:47:05,829 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 09:47:05,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:47:05,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:47:05,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:47:05,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:47:05,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:47:05,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:47:05,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:47:05,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:47:05,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:47:05,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:47:05,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:47:05,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:47:05,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:47:05,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:47:05,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:47:05,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:47:05,871 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:47:05,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:47:05,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:47:05,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:47:05,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:47:05,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:47:05,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:47:05,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:47:05,873 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:47:05,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:47:05,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:47:05,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:47:05,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:47:05,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:47:05,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:47:05,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:47:05,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:47:05,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:47:05,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:47:05,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:47:05,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:47:05,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:47:06,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:47:06,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:47:06,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:47:06,390 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:47:06,391 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:47:06,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i [2021-01-06 09:47:06,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3e80d6e5b/0f41a17e07d841cbb266b8912774f7ec/FLAG23be62bcf [2021-01-06 09:47:07,159 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:47:07,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i [2021-01-06 09:47:07,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3e80d6e5b/0f41a17e07d841cbb266b8912774f7ec/FLAG23be62bcf [2021-01-06 09:47:07,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3e80d6e5b/0f41a17e07d841cbb266b8912774f7ec [2021-01-06 09:47:07,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:47:07,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:47:07,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:07,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:47:07,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:47:07,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7078c192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07, skipping insertion in model container [2021-01-06 09:47:07,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:47:07,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:47:07,751 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i[823,836] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:47:07,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:07,783 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:47:07,798 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-2.i[823,836] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:47:07,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:07,838 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:47:07,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07 WrapperNode [2021-01-06 09:47:07,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:07,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:07,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:47:07,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:47:07,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:07,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:47:07,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:47:07,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:47:07,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... [2021-01-06 09:47:07,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:47:07,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:47:07,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:47:07,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:47:07,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 09:47:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:47:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:47:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:47:08,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:47:08,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:47:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:47:08,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:47:08,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:47:08,420 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 09:47:08,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:08 BoogieIcfgContainer [2021-01-06 09:47:08,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:47:08,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:47:08,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:47:08,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:47:08,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:47:07" (1/3) ... [2021-01-06 09:47:08,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ac658b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:08, skipping insertion in model container [2021-01-06 09:47:08,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:07" (2/3) ... [2021-01-06 09:47:08,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ac658b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:08, skipping insertion in model container [2021-01-06 09:47:08,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:08" (3/3) ... [2021-01-06 09:47:08,433 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-2.i [2021-01-06 09:47:08,443 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:47:08,449 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:47:08,477 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:47:08,510 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:47:08,511 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:47:08,511 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:47:08,511 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:47:08,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:47:08,511 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:47:08,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:47:08,512 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:47:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 09:47:08,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 09:47:08,539 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:08,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:08,540 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:08,554 INFO L82 PathProgramCache]: Analyzing trace with hash -952172836, now seen corresponding path program 1 times [2021-01-06 09:47:08,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:08,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014572731] [2021-01-06 09:47:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:47:08,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014572731] [2021-01-06 09:47:08,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:47:08,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:47:08,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313012488] [2021-01-06 09:47:08,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:47:08,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:47:08,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:47:08,821 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2021-01-06 09:47:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:08,913 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2021-01-06 09:47:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:47:08,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 09:47:08,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:08,928 INFO L225 Difference]: With dead ends: 42 [2021-01-06 09:47:08,929 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 09:47:08,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:47:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 09:47:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-01-06 09:47:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 09:47:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 09:47:08,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2021-01-06 09:47:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:08,978 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 09:47:08,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:47:08,978 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 09:47:08,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 09:47:08,979 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:08,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:08,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:47:08,980 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1567052653, now seen corresponding path program 1 times [2021-01-06 09:47:08,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:08,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509402891] [2021-01-06 09:47:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:47:09,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509402891] [2021-01-06 09:47:09,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930965129] [2021-01-06 09:47:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:09,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:47:09,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:47:09,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:09,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:47:09,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793383294] [2021-01-06 09:47:09,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:47:09,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:09,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:47:09,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:47:09,341 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2021-01-06 09:47:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:09,425 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-01-06 09:47:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:47:09,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 09:47:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:09,427 INFO L225 Difference]: With dead ends: 41 [2021-01-06 09:47:09,427 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 09:47:09,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:47:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 09:47:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-01-06 09:47:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:47:09,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-06 09:47:09,435 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2021-01-06 09:47:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:09,436 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-06 09:47:09,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:47:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-06 09:47:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:47:09,437 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:09,437 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:09,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:47:09,651 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash 159288628, now seen corresponding path program 2 times [2021-01-06 09:47:09,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:09,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576621632] [2021-01-06 09:47:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:47:09,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576621632] [2021-01-06 09:47:09,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166656575] [2021-01-06 09:47:09,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:09,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:09,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:47:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:47:09,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:09,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:47:09,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805435624] [2021-01-06 09:47:09,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:47:09,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:09,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:47:09,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:47:09,875 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2021-01-06 09:47:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:09,955 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-01-06 09:47:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:47:09,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 09:47:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:09,957 INFO L225 Difference]: With dead ends: 50 [2021-01-06 09:47:09,957 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 09:47:09,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:47:09,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 09:47:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-01-06 09:47:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 09:47:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-01-06 09:47:09,964 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2021-01-06 09:47:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:09,965 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-01-06 09:47:09,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:47:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-01-06 09:47:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 09:47:09,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:09,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:10,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:10,181 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:10,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:10,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2098372907, now seen corresponding path program 3 times [2021-01-06 09:47:10,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:10,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955633275] [2021-01-06 09:47:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:47:10,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955633275] [2021-01-06 09:47:10,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971833718] [2021-01-06 09:47:10,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:10,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:47:10,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:10,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:47:10,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 09:47:10,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:10,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:47:10,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562833312] [2021-01-06 09:47:10,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:47:10,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:10,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:47:10,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:47:10,394 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2021-01-06 09:47:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:10,461 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-01-06 09:47:10,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:47:10,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-01-06 09:47:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:10,464 INFO L225 Difference]: With dead ends: 59 [2021-01-06 09:47:10,464 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 09:47:10,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:47:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 09:47:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-01-06 09:47:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:47:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-01-06 09:47:10,472 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-01-06 09:47:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:10,472 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-01-06 09:47:10,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:47:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-01-06 09:47:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:47:10,474 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:10,474 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:10,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:10,688 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1609282676, now seen corresponding path program 4 times [2021-01-06 09:47:10,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:10,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535436302] [2021-01-06 09:47:10,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 09:47:10,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535436302] [2021-01-06 09:47:10,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178390323] [2021-01-06 09:47:10,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:10,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:10,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:10,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:47:10,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 09:47:10,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:10,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:47:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163811059] [2021-01-06 09:47:10,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:47:10,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:10,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:47:10,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:47:10,929 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2021-01-06 09:47:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:11,005 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-01-06 09:47:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:47:11,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-01-06 09:47:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:11,006 INFO L225 Difference]: With dead ends: 68 [2021-01-06 09:47:11,006 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 09:47:11,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:47:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 09:47:11,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-01-06 09:47:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 09:47:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-01-06 09:47:11,014 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2021-01-06 09:47:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:11,014 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-01-06 09:47:11,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:47:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-01-06 09:47:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 09:47:11,015 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:11,016 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:11,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:11,230 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:11,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1784739267, now seen corresponding path program 5 times [2021-01-06 09:47:11,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:11,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376149027] [2021-01-06 09:47:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 09:47:11,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376149027] [2021-01-06 09:47:11,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584678858] [2021-01-06 09:47:11,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:11,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 09:47:11,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:11,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:47:11,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 09:47:11,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:11,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:47:11,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642369792] [2021-01-06 09:47:11,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:47:11,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:11,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:47:11,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:11,876 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2021-01-06 09:47:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:11,960 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-01-06 09:47:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:47:11,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-01-06 09:47:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:11,962 INFO L225 Difference]: With dead ends: 77 [2021-01-06 09:47:11,962 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 09:47:11,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:11,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 09:47:11,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-01-06 09:47:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 09:47:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-01-06 09:47:11,979 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-01-06 09:47:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:11,983 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-01-06 09:47:11,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:47:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-01-06 09:47:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 09:47:11,985 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:11,985 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:12,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:47:12,204 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2008431076, now seen corresponding path program 6 times [2021-01-06 09:47:12,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:12,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212603813] [2021-01-06 09:47:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-01-06 09:47:12,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212603813] [2021-01-06 09:47:12,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099039164] [2021-01-06 09:47:12,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:12,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:47:12,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:12,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:47:12,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 09:47:12,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:12,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 12 [2021-01-06 09:47:12,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152465566] [2021-01-06 09:47:12,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:47:12,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:12,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:47:12,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:12,709 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 12 states. [2021-01-06 09:47:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:12,849 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-01-06 09:47:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:47:12,850 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2021-01-06 09:47:12,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:12,851 INFO L225 Difference]: With dead ends: 86 [2021-01-06 09:47:12,851 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 09:47:12,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:12,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 09:47:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-01-06 09:47:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 09:47:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-01-06 09:47:12,861 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2021-01-06 09:47:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:12,861 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-01-06 09:47:12,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:47:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-01-06 09:47:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 09:47:12,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:12,863 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:13,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:13,079 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:13,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:13,080 INFO L82 PathProgramCache]: Analyzing trace with hash -700601765, now seen corresponding path program 7 times [2021-01-06 09:47:13,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:13,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675333104] [2021-01-06 09:47:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 09:47:13,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675333104] [2021-01-06 09:47:13,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185515363] [2021-01-06 09:47:13,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:13,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:47:13,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-01-06 09:47:13,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:13,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:47:13,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837567797] [2021-01-06 09:47:13,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:47:13,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:13,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:47:13,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:13,378 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 11 states. [2021-01-06 09:47:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:13,494 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2021-01-06 09:47:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:47:13,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2021-01-06 09:47:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:13,496 INFO L225 Difference]: With dead ends: 95 [2021-01-06 09:47:13,496 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 09:47:13,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 09:47:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-01-06 09:47:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:47:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-01-06 09:47:13,508 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2021-01-06 09:47:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:13,508 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-01-06 09:47:13,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:47:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-01-06 09:47:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:47:13,510 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:13,510 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:13,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:13,726 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:13,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:13,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1469732924, now seen corresponding path program 8 times [2021-01-06 09:47:13,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:13,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448583608] [2021-01-06 09:47:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 09:47:13,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448583608] [2021-01-06 09:47:13,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334309105] [2021-01-06 09:47:13,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:13,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:13,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:13,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:47:13,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 09:47:14,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:14,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:47:14,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164758057] [2021-01-06 09:47:14,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:47:14,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:14,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:47:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:14,042 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 12 states. [2021-01-06 09:47:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:14,175 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2021-01-06 09:47:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:47:14,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2021-01-06 09:47:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:14,176 INFO L225 Difference]: With dead ends: 104 [2021-01-06 09:47:14,177 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 09:47:14,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 09:47:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-01-06 09:47:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:47:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-01-06 09:47:14,185 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2021-01-06 09:47:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:14,186 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-01-06 09:47:14,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:47:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-01-06 09:47:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 09:47:14,187 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:14,187 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:14,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:47:14,403 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash 300072691, now seen corresponding path program 9 times [2021-01-06 09:47:14,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:14,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139369647] [2021-01-06 09:47:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 09:47:14,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139369647] [2021-01-06 09:47:14,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849734993] [2021-01-06 09:47:14,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:14,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:47:14,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:47:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-01-06 09:47:14,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:14,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:47:14,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174807628] [2021-01-06 09:47:14,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:47:14,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:47:14,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:14,897 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 13 states. [2021-01-06 09:47:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:15,025 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-01-06 09:47:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:47:15,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2021-01-06 09:47:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:15,026 INFO L225 Difference]: With dead ends: 113 [2021-01-06 09:47:15,027 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 09:47:15,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 09:47:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-01-06 09:47:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 09:47:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-01-06 09:47:15,036 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2021-01-06 09:47:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:15,036 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-01-06 09:47:15,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:47:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-01-06 09:47:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 09:47:15,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:15,037 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:15,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:15,252 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:15,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1049188716, now seen corresponding path program 10 times [2021-01-06 09:47:15,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:15,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337531987] [2021-01-06 09:47:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 09:47:15,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337531987] [2021-01-06 09:47:15,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956941461] [2021-01-06 09:47:15,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:15,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:15,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:47:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 09:47:15,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:15,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:47:15,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619640069] [2021-01-06 09:47:15,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:47:15,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:47:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:47:15,664 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 14 states. [2021-01-06 09:47:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:15,815 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-01-06 09:47:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:47:15,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2021-01-06 09:47:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:15,823 INFO L225 Difference]: With dead ends: 122 [2021-01-06 09:47:15,824 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 09:47:15,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:47:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 09:47:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-01-06 09:47:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 09:47:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-01-06 09:47:15,838 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2021-01-06 09:47:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:15,838 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-01-06 09:47:15,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:47:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-01-06 09:47:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 09:47:15,839 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:15,840 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:16,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:16,054 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1946825611, now seen corresponding path program 11 times [2021-01-06 09:47:16,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:16,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740376480] [2021-01-06 09:47:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-01-06 09:47:16,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740376480] [2021-01-06 09:47:16,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539764454] [2021-01-06 09:47:16,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:30,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 09:47:30,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:30,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:47:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 09:47:30,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:30,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:47:30,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799338812] [2021-01-06 09:47:30,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:47:30,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:47:30,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:47:30,909 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 15 states. [2021-01-06 09:47:31,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:31,036 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-01-06 09:47:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:47:31,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2021-01-06 09:47:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:31,038 INFO L225 Difference]: With dead ends: 131 [2021-01-06 09:47:31,038 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 09:47:31,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:47:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 09:47:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-01-06 09:47:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:47:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-01-06 09:47:31,051 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 66 [2021-01-06 09:47:31,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:31,052 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-01-06 09:47:31,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:47:31,052 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-01-06 09:47:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:47:31,053 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:31,053 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:31,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:47:31,254 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:31,256 INFO L82 PathProgramCache]: Analyzing trace with hash -780065556, now seen corresponding path program 12 times [2021-01-06 09:47:31,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:31,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111844459] [2021-01-06 09:47:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 09:47:31,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111844459] [2021-01-06 09:47:31,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571219423] [2021-01-06 09:47:31,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:41,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:47:41,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:41,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 09:47:41,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 09:47:42,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:42,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:47:42,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991820436] [2021-01-06 09:47:42,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:47:42,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:42,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:47:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:47:42,085 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 16 states. [2021-01-06 09:47:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:42,200 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2021-01-06 09:47:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:47:42,201 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2021-01-06 09:47:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:42,201 INFO L225 Difference]: With dead ends: 140 [2021-01-06 09:47:42,202 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 09:47:42,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:47:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 09:47:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-01-06 09:47:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 09:47:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-01-06 09:47:42,208 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2021-01-06 09:47:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:42,208 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-01-06 09:47:42,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:47:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-01-06 09:47:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 09:47:42,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:42,210 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:42,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:47:42,411 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2028865571, now seen corresponding path program 13 times [2021-01-06 09:47:42,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:42,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569102236] [2021-01-06 09:47:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 09:47:42,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569102236] [2021-01-06 09:47:42,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152041704] [2021-01-06 09:47:42,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:42,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:47:42,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-01-06 09:47:42,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:42,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:47:42,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54401928] [2021-01-06 09:47:42,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:47:42,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:42,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:47:42,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:42,785 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 17 states. [2021-01-06 09:47:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:42,962 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2021-01-06 09:47:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:47:42,964 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2021-01-06 09:47:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:42,965 INFO L225 Difference]: With dead ends: 149 [2021-01-06 09:47:42,965 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 09:47:42,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 09:47:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-01-06 09:47:42,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 09:47:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-01-06 09:47:42,989 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 76 [2021-01-06 09:47:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:42,989 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-01-06 09:47:42,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:47:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-01-06 09:47:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:47:42,991 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:42,991 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:43,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:47:43,212 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:43,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:43,212 INFO L82 PathProgramCache]: Analyzing trace with hash 510645060, now seen corresponding path program 14 times [2021-01-06 09:47:43,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:43,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149984805] [2021-01-06 09:47:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:47:43,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149984805] [2021-01-06 09:47:43,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091597657] [2021-01-06 09:47:43,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:43,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:43,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:43,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:47:43,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:47:43,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:43,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:47:43,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507982032] [2021-01-06 09:47:43,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:47:43,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:43,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:47:43,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:47:43,622 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 18 states. [2021-01-06 09:47:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:43,795 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2021-01-06 09:47:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:47:43,795 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2021-01-06 09:47:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:43,796 INFO L225 Difference]: With dead ends: 158 [2021-01-06 09:47:43,796 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 09:47:43,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:47:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 09:47:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-01-06 09:47:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 09:47:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-01-06 09:47:43,802 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 81 [2021-01-06 09:47:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:43,802 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-01-06 09:47:43,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:47:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-01-06 09:47:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 09:47:43,803 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:43,803 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:44,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:44,018 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:44,019 INFO L82 PathProgramCache]: Analyzing trace with hash -498582341, now seen corresponding path program 15 times [2021-01-06 09:47:44,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:44,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305638998] [2021-01-06 09:47:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-01-06 09:47:44,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305638998] [2021-01-06 09:47:44,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150998813] [2021-01-06 09:47:44,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:46,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:47:46,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:46,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:47:46,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-01-06 09:47:46,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:46,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:47:46,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655376218] [2021-01-06 09:47:46,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:47:46,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:47:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:46,908 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 19 states. [2021-01-06 09:47:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:47,102 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2021-01-06 09:47:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:47:47,103 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2021-01-06 09:47:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:47,103 INFO L225 Difference]: With dead ends: 167 [2021-01-06 09:47:47,104 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 09:47:47,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 09:47:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-01-06 09:47:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 09:47:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-01-06 09:47:47,110 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2021-01-06 09:47:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:47,110 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-01-06 09:47:47,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:47:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-01-06 09:47:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 09:47:47,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:47,112 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:47,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:47:47,326 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1720143460, now seen corresponding path program 16 times [2021-01-06 09:47:47,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:47,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556815826] [2021-01-06 09:47:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2021-01-06 09:47:47,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556815826] [2021-01-06 09:47:47,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408433664] [2021-01-06 09:47:47,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:47,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:47,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:47,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:47:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 09:47:47,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:47,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:47:47,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417588056] [2021-01-06 09:47:47,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:47:47,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:47:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:47:47,800 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 20 states. [2021-01-06 09:47:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:47,975 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2021-01-06 09:47:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:47:47,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2021-01-06 09:47:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:47,977 INFO L225 Difference]: With dead ends: 176 [2021-01-06 09:47:47,977 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 09:47:47,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:47:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 09:47:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-01-06 09:47:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 09:47:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2021-01-06 09:47:47,986 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 91 [2021-01-06 09:47:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:47,986 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2021-01-06 09:47:47,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:47:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2021-01-06 09:47:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 09:47:47,987 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:47,988 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:48,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:47:48,202 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash -682438317, now seen corresponding path program 17 times [2021-01-06 09:47:48,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:48,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49236092] [2021-01-06 09:47:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2021-01-06 09:47:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49236092] [2021-01-06 09:47:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814547498] [2021-01-06 09:47:48,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true