/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/verifythis/prefixsum_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:11:04,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:11:04,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:11:04,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:11:04,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:11:04,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:11:04,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:11:04,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:11:04,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:11:04,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:11:04,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:11:04,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:11:04,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:11:04,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:11:04,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:11:04,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:11:04,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:11:04,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:11:04,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:11:04,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:11:04,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:11:04,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:11:04,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:11:04,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:11:05,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 17:11:05,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 17:11:05,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 17:11:05,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 17:11:05,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 17:11:05,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 17:11:05,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:11:05,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:11:05,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:11:05,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:11:05,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:11:05,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:11:05,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:11:05,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:11:05,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:11:05,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:11:05,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:11:05,024 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 17:11:05,070 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:11:05,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:11:05,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:11:05,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:11:05,075 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:11:05,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:11:05,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:11:05,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:11:05,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:11:05,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:11:05,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:11:05,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:11:05,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:11:05,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:11:05,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:11:05,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:11:05,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:11:05,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:11:05,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:11:05,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:11:05,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:11:05,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:11:05,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:11:05,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:11:05,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:11:05,081 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:11:05,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:11:05,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:11:05,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:11:05,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:11:05,502 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:11:05,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-01-06 17:11:05,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a85e0cf60/3753e083697e4659a5ffad16b4d6414a/FLAG1e28ce43b [2021-01-06 17:11:06,182 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:11:06,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-01-06 17:11:06,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a85e0cf60/3753e083697e4659a5ffad16b4d6414a/FLAG1e28ce43b [2021-01-06 17:11:06,547 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a85e0cf60/3753e083697e4659a5ffad16b4d6414a [2021-01-06 17:11:06,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:11:06,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:11:06,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:11:06,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:11:06,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:11:06,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@754e9b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06, skipping insertion in model container [2021-01-06 17:11:06,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:11:06,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:11:06,758 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/verifythis/prefixsum_iter.c[526,539] left hand side expression in assignment: lhs: VariableLHS[~space~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~right~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~left~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,IdentifierExpression[~n,],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~space,] left hand side expression in assignment: lhs: VariableLHS[~space,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~right~1,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~left~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~right~1,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a0~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a0~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] [2021-01-06 17:11:06,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:11:06,810 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:11:06,825 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/verifythis/prefixsum_iter.c[526,539] left hand side expression in assignment: lhs: VariableLHS[~space~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~right~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~left~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMINUS,IdentifierExpression[~n,],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~space,] left hand side expression in assignment: lhs: VariableLHS[~space,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~right~1,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~left~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~right~1,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a0~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a0~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] [2021-01-06 17:11:06,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:11:06,862 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:11:06,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06 WrapperNode [2021-01-06 17:11:06,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:11:06,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:11:06,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:11:06,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:11:06,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:11:06,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:11:06,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:11:06,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:11:06,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (1/1) ... [2021-01-06 17:11:06,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:11:06,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:11:06,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:11:06,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:11:06,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (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 17:11:07,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:11:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:11:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 17:11:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 17:11:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:11:07,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:11:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 17:11:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 17:11:07,798 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:11:07,799 INFO L299 CfgBuilder]: Removed 29 assume(true) statements. [2021-01-06 17:11:07,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:11:07 BoogieIcfgContainer [2021-01-06 17:11:07,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:11:07,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:11:07,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:11:07,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:11:07,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:11:06" (1/3) ... [2021-01-06 17:11:07,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2270e897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:11:07, skipping insertion in model container [2021-01-06 17:11:07,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:11:06" (2/3) ... [2021-01-06 17:11:07,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2270e897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:11:07, skipping insertion in model container [2021-01-06 17:11:07,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:11:07" (3/3) ... [2021-01-06 17:11:07,818 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2021-01-06 17:11:07,825 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:11:07,831 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:11:07,852 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:11:07,897 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:11:07,897 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:11:07,897 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:11:07,898 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:11:07,898 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:11:07,898 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:11:07,898 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:11:07,899 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:11:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-01-06 17:11:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:11:07,926 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:07,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:07,928 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:07,935 INFO L82 PathProgramCache]: Analyzing trace with hash -846101861, now seen corresponding path program 1 times [2021-01-06 17:11:07,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:07,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813760628] [2021-01-06 17:11:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:08,166 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 17:11:08,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813760628] [2021-01-06 17:11:08,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:08,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:11:08,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938930697] [2021-01-06 17:11:08,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:11:08,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:11:08,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:11:08,201 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2021-01-06 17:11:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:08,238 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2021-01-06 17:11:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:11:08,243 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2021-01-06 17:11:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:08,257 INFO L225 Difference]: With dead ends: 63 [2021-01-06 17:11:08,257 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 17:11:08,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:11:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 17:11:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 17:11:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 17:11:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-06 17:11:08,294 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2021-01-06 17:11:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:08,294 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-06 17:11:08,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:11:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-06 17:11:08,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:11:08,295 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:08,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:08,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:11:08,296 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash 748804443, now seen corresponding path program 1 times [2021-01-06 17:11:08,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:08,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101351355] [2021-01-06 17:11:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:08,525 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 17:11:08,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101351355] [2021-01-06 17:11:08,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:08,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:11:08,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524914893] [2021-01-06 17:11:08,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:11:08,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:11:08,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:11:08,530 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2021-01-06 17:11:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:08,783 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-01-06 17:11:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:11:08,784 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 17:11:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:08,786 INFO L225 Difference]: With dead ends: 86 [2021-01-06 17:11:08,786 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 17:11:08,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 17:11:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2021-01-06 17:11:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:11:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-01-06 17:11:08,796 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 21 [2021-01-06 17:11:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:08,796 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-01-06 17:11:08,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:11:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-01-06 17:11:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 17:11:08,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:08,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:08,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:11:08,799 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:08,799 INFO L82 PathProgramCache]: Analyzing trace with hash 400112637, now seen corresponding path program 1 times [2021-01-06 17:11:08,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:08,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839250656] [2021-01-06 17:11:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:11:09,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839250656] [2021-01-06 17:11:09,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:09,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 17:11:09,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760443615] [2021-01-06 17:11:09,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:11:09,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:09,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:11:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:11:09,065 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 7 states. [2021-01-06 17:11:09,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:09,355 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-01-06 17:11:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:11:09,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2021-01-06 17:11:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:09,357 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:11:09,357 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:11:09,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:11:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:11:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-01-06 17:11:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 17:11:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-01-06 17:11:09,366 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2021-01-06 17:11:09,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:09,367 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-01-06 17:11:09,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:11:09,367 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-01-06 17:11:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:11:09,368 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:09,369 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:09,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:11:09,369 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:09,370 INFO L82 PathProgramCache]: Analyzing trace with hash -670891724, now seen corresponding path program 1 times [2021-01-06 17:11:09,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:09,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522159652] [2021-01-06 17:11:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:09,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522159652] [2021-01-06 17:11:09,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150101882] [2021-01-06 17:11:09,554 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 17:11:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:09,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:11:09,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:09,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:09,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-01-06 17:11:09,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513546341] [2021-01-06 17:11:09,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:11:09,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:11:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:09,899 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 11 states. [2021-01-06 17:11:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:10,274 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2021-01-06 17:11:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:11:10,275 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2021-01-06 17:11:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:10,279 INFO L225 Difference]: With dead ends: 102 [2021-01-06 17:11:10,280 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 17:11:10,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:11:10,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 17:11:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 34. [2021-01-06 17:11:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 17:11:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-01-06 17:11:10,302 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 27 [2021-01-06 17:11:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:10,303 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-01-06 17:11:10,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:11:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-01-06 17:11:10,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 17:11:10,307 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:10,308 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:10,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:10,523 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash -631610794, now seen corresponding path program 2 times [2021-01-06 17:11:10,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:10,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969728928] [2021-01-06 17:11:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:11:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969728928] [2021-01-06 17:11:10,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963920524] [2021-01-06 17:11:10,708 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 17:11:10,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:11:10,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:11:10,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:11:11,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:11,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-01-06 17:11:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748888324] [2021-01-06 17:11:11,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:11:11,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:11:11,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:11,013 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2021-01-06 17:11:11,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:11,161 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-01-06 17:11:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:11:11,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 17:11:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:11,163 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:11:11,163 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:11:11,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:11:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:11:11,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-01-06 17:11:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:11:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-01-06 17:11:11,170 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 29 [2021-01-06 17:11:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:11,171 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-01-06 17:11:11,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:11:11,171 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-01-06 17:11:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:11:11,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:11,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:11,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:11,387 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:11,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1948085563, now seen corresponding path program 1 times [2021-01-06 17:11:11,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:11,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225460873] [2021-01-06 17:11:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:11:11,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225460873] [2021-01-06 17:11:11,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:11:11,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:11:11,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77613718] [2021-01-06 17:11:11,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:11:11,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:11:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:11:11,459 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2021-01-06 17:11:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:11,470 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-01-06 17:11:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:11:11,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2021-01-06 17:11:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:11,472 INFO L225 Difference]: With dead ends: 53 [2021-01-06 17:11:11,472 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:11:11,472 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 17:11:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:11:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 17:11:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:11:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-01-06 17:11:11,478 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 32 [2021-01-06 17:11:11,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:11,479 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-01-06 17:11:11,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:11:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-01-06 17:11:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:11:11,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:11,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:11,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 17:11:11,480 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1176909381, now seen corresponding path program 1 times [2021-01-06 17:11:11,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:11,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076151084] [2021-01-06 17:11:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:11:11,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076151084] [2021-01-06 17:11:11,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73946618] [2021-01-06 17:11:11,604 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 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 17:11:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:11:11,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:11,769 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:11,779 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:11,784 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:11,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:11:11,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:11,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2021-01-06 17:11:11,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317051639] [2021-01-06 17:11:11,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:11:11,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:11,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:11:11,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:11,819 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 6 states. [2021-01-06 17:11:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:11,881 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-01-06 17:11:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:11:11,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-01-06 17:11:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:11,883 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:11:11,883 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:11:11,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:11:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:11:11,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-01-06 17:11:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 17:11:11,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-01-06 17:11:11,891 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 33 [2021-01-06 17:11:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:11,891 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-01-06 17:11:11,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:11:11,891 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-01-06 17:11:11,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:11:11,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:11,893 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:12,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:12,107 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1394897861, now seen corresponding path program 1 times [2021-01-06 17:11:12,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:12,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407471740] [2021-01-06 17:11:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:11:12,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407471740] [2021-01-06 17:11:12,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269558403] [2021-01-06 17:11:12,228 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 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 17:11:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:11:12,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:11:12,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:12,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-01-06 17:11:12,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757277131] [2021-01-06 17:11:12,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:11:12,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:12,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:11:12,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:11:12,427 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 12 states. [2021-01-06 17:11:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:12,788 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-01-06 17:11:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:11:12,789 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2021-01-06 17:11:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:12,790 INFO L225 Difference]: With dead ends: 85 [2021-01-06 17:11:12,791 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 17:11:12,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:11:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 17:11:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 39. [2021-01-06 17:11:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:11:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-06 17:11:12,799 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 36 [2021-01-06 17:11:12,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:12,800 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-06 17:11:12,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:11:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-06 17:11:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:11:12,801 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:12,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:13,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:13,015 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:13,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1037341174, now seen corresponding path program 1 times [2021-01-06 17:11:13,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:13,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989566949] [2021-01-06 17:11:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:11:13,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989566949] [2021-01-06 17:11:13,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571689290] [2021-01-06 17:11:13,198 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 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 17:11:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:13,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 98 conjunts are in the unsatisfiable core [2021-01-06 17:11:13,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:13,379 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-06 17:11:13,381 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:13,399 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-01-06 17:11:13,399 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,408 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:13,409 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,410 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:18 [2021-01-06 17:11:13,454 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:13,455 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-01-06 17:11:13,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:13,459 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,469 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:13,474 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-01-06 17:11:13,475 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:13,485 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,486 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-01-06 17:11:13,553 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-01-06 17:11:13,555 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,566 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:13,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:41 [2021-01-06 17:11:13,635 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-01-06 17:11:13,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,660 INFO L625 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-01-06 17:11:13,661 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,661 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:40 [2021-01-06 17:11:13,925 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-01-06 17:11:13,926 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:13,947 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:13,953 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:13,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:82, output treesize:72 [2021-01-06 17:11:14,531 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-01-06 17:11:15,177 WARN L197 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-01-06 17:11:15,832 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-01-06 17:11:15,877 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 60 [2021-01-06 17:11:15,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:15,901 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:15,909 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:15,909 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:92, output treesize:84 [2021-01-06 17:11:16,507 WARN L197 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-01-06 17:11:17,115 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-01-06 17:11:17,150 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 76 [2021-01-06 17:11:17,152 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:17,175 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:17,198 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:17,198 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:103, output treesize:155 [2021-01-06 17:11:19,117 WARN L197 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-01-06 17:11:19,943 WARN L197 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-01-06 17:11:20,711 WARN L197 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-01-06 17:11:21,417 WARN L197 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-01-06 17:11:21,440 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:21,443 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:21,444 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:21,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:21,450 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:21,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:21,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:21,456 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:21,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:21,459 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:21,466 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 17:11:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:11:21,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:21,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23] total 30 [2021-01-06 17:11:21,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097544074] [2021-01-06 17:11:21,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 17:11:21,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:21,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 17:11:21,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=771, Unknown=2, NotChecked=0, Total=870 [2021-01-06 17:11:21,533 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 30 states. [2021-01-06 17:11:29,650 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2021-01-06 17:11:32,302 WARN L197 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2021-01-06 17:11:33,967 WARN L197 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-01-06 17:11:34,769 WARN L197 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-01-06 17:11:37,058 WARN L197 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2021-01-06 17:11:38,660 WARN L197 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2021-01-06 17:11:40,262 WARN L197 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2021-01-06 17:11:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:41,063 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2021-01-06 17:11:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 17:11:41,063 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2021-01-06 17:11:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:41,067 INFO L225 Difference]: With dead ends: 131 [2021-01-06 17:11:41,067 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 17:11:41,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=549, Invalid=3871, Unknown=2, NotChecked=0, Total=4422 [2021-01-06 17:11:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 17:11:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 71. [2021-01-06 17:11:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 17:11:41,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-01-06 17:11:41,088 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 37 [2021-01-06 17:11:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:41,088 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-01-06 17:11:41,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 17:11:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-01-06 17:11:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:11:41,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:41,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:41,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:41,291 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:41,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:41,292 INFO L82 PathProgramCache]: Analyzing trace with hash -309956456, now seen corresponding path program 2 times [2021-01-06 17:11:41,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:41,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274373754] [2021-01-06 17:11:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:11:41,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274373754] [2021-01-06 17:11:41,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173812113] [2021-01-06 17:11:41,408 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 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 17:11:41,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:11:41,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:41,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:11:41,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:11:41,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:41,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-01-06 17:11:41,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748380087] [2021-01-06 17:11:41,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:11:41,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:41,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:11:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:11:41,629 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand 14 states. [2021-01-06 17:11:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:42,124 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2021-01-06 17:11:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:11:42,125 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2021-01-06 17:11:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:42,126 INFO L225 Difference]: With dead ends: 146 [2021-01-06 17:11:42,126 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 17:11:42,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:11:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 17:11:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 72. [2021-01-06 17:11:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 17:11:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2021-01-06 17:11:42,163 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 39 [2021-01-06 17:11:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:42,163 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2021-01-06 17:11:42,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:11:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2021-01-06 17:11:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:11:42,171 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:42,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:42,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:42,376 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:42,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1189584364, now seen corresponding path program 1 times [2021-01-06 17:11:42,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:42,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756070396] [2021-01-06 17:11:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 17:11:42,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756070396] [2021-01-06 17:11:42,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937432421] [2021-01-06 17:11:42,465 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 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 17:11:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:11:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:11:42,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:42,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-01-06 17:11:42,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063805694] [2021-01-06 17:11:42,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:11:42,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:42,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:11:42,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:11:42,707 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 14 states. [2021-01-06 17:11:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:43,001 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2021-01-06 17:11:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:11:43,001 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2021-01-06 17:11:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:43,003 INFO L225 Difference]: With dead ends: 119 [2021-01-06 17:11:43,003 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 17:11:43,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:11:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 17:11:43,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-01-06 17:11:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 17:11:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-01-06 17:11:43,021 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 39 [2021-01-06 17:11:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:43,021 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-01-06 17:11:43,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:11:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-01-06 17:11:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 17:11:43,022 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:43,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:43,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:43,238 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:43,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2012645282, now seen corresponding path program 2 times [2021-01-06 17:11:43,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:43,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685966434] [2021-01-06 17:11:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:11:43,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685966434] [2021-01-06 17:11:43,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044403583] [2021-01-06 17:11:43,431 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 17:11:43,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:11:43,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:43,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:11:43,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:43,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:43,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:43,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:43,753 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:11:43,756 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:11:43,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:43,762 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 17:11:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 17:11:43,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:43,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-01-06 17:11:43,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386596426] [2021-01-06 17:11:43,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:11:43,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:43,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:11:43,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:11:43,992 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand 22 states. [2021-01-06 17:11:45,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:45,363 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2021-01-06 17:11:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:11:45,363 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 41 [2021-01-06 17:11:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:45,365 INFO L225 Difference]: With dead ends: 147 [2021-01-06 17:11:45,365 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 17:11:45,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:11:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 17:11:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 84. [2021-01-06 17:11:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 17:11:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-01-06 17:11:45,384 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 41 [2021-01-06 17:11:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:45,385 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-01-06 17:11:45,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:11:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-01-06 17:11:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:11:45,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:45,386 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:45,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:11:45,590 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -325294395, now seen corresponding path program 3 times [2021-01-06 17:11:45,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:45,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106139027] [2021-01-06 17:11:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:11:45,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106139027] [2021-01-06 17:11:45,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088285830] [2021-01-06 17:11:45,701 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 17:11:45,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:11:45,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:45,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:11:45,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 17:11:45,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:45,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-01-06 17:11:45,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621846276] [2021-01-06 17:11:45,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:11:45,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:11:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:11:45,952 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 15 states. [2021-01-06 17:11:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:46,482 INFO L93 Difference]: Finished difference Result 165 states and 193 transitions. [2021-01-06 17:11:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:11:46,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2021-01-06 17:11:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:46,484 INFO L225 Difference]: With dead ends: 165 [2021-01-06 17:11:46,484 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 17:11:46,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:11:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 17:11:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 94. [2021-01-06 17:11:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 17:11:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2021-01-06 17:11:46,506 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 42 [2021-01-06 17:11:46,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:46,507 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2021-01-06 17:11:46,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:11:46,507 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2021-01-06 17:11:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:11:46,508 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:46,508 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:46,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:46,723 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1664573759, now seen corresponding path program 4 times [2021-01-06 17:11:46,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:46,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592454747] [2021-01-06 17:11:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 17:11:46,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592454747] [2021-01-06 17:11:46,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408859869] [2021-01-06 17:11:46,876 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 17:11:46,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:11:46,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:46,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:11:46,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 17:11:47,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:47,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-01-06 17:11:47,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107266858] [2021-01-06 17:11:47,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:11:47,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:47,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:11:47,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:11:47,150 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 16 states. [2021-01-06 17:11:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:48,080 INFO L93 Difference]: Finished difference Result 164 states and 200 transitions. [2021-01-06 17:11:48,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 17:11:48,080 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2021-01-06 17:11:48,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:48,081 INFO L225 Difference]: With dead ends: 164 [2021-01-06 17:11:48,084 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 17:11:48,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:11:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 17:11:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2021-01-06 17:11:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 17:11:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2021-01-06 17:11:48,103 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 42 [2021-01-06 17:11:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:48,104 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2021-01-06 17:11:48,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:11:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2021-01-06 17:11:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:11:48,104 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:48,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:48,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:11:48,311 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:48,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:48,312 INFO L82 PathProgramCache]: Analyzing trace with hash 714914557, now seen corresponding path program 5 times [2021-01-06 17:11:48,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:48,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683446705] [2021-01-06 17:11:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:11:48,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683446705] [2021-01-06 17:11:48,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793584424] [2021-01-06 17:11:48,400 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 17:11:48,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 17:11:48,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:48,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:11:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:11:48,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:48,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-01-06 17:11:48,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37399679] [2021-01-06 17:11:48,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:11:48,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:48,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:11:48,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:11:48,687 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 14 states. [2021-01-06 17:11:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:49,089 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2021-01-06 17:11:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:11:49,090 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2021-01-06 17:11:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:49,091 INFO L225 Difference]: With dead ends: 121 [2021-01-06 17:11:49,091 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 17:11:49,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:11:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 17:11:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 48. [2021-01-06 17:11:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 17:11:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-01-06 17:11:49,103 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 42 [2021-01-06 17:11:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:49,104 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-01-06 17:11:49,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:11:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-01-06 17:11:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 17:11:49,104 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:49,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:49,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:11:49,308 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash 216186809, now seen corresponding path program 3 times [2021-01-06 17:11:49,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:49,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478692276] [2021-01-06 17:11:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:11:49,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478692276] [2021-01-06 17:11:49,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61765012] [2021-01-06 17:11:49,380 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 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 17:11:49,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:11:49,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:11:49,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 17:11:49,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:11:49,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-01-06 17:11:49,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513507901] [2021-01-06 17:11:49,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:11:49,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:49,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:11:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:11:49,787 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 9 states. [2021-01-06 17:11:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:50,237 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2021-01-06 17:11:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:11:50,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2021-01-06 17:11:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:50,238 INFO L225 Difference]: With dead ends: 92 [2021-01-06 17:11:50,239 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 17:11:50,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:11:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 17:11:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-01-06 17:11:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 17:11:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-01-06 17:11:50,250 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 44 [2021-01-06 17:11:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:50,250 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-01-06 17:11:50,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:11:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-01-06 17:11:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 17:11:50,251 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:50,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:50,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:11:50,465 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:50,466 INFO L82 PathProgramCache]: Analyzing trace with hash 742749345, now seen corresponding path program 6 times [2021-01-06 17:11:50,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:50,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262714165] [2021-01-06 17:11:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-01-06 17:11:50,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262714165] [2021-01-06 17:11:50,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966205019] [2021-01-06 17:11:50,548 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 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 17:11:50,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 17:11:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:11:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:11:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:50,745 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:50,750 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:50,751 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:11:50,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-01-06 17:11:50,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:50,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-01-06 17:11:50,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487814094] [2021-01-06 17:11:50,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:11:50,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:50,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:11:50,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:11:50,793 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 11 states. [2021-01-06 17:11:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:11:50,945 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-01-06 17:11:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:11:50,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2021-01-06 17:11:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:11:50,946 INFO L225 Difference]: With dead ends: 68 [2021-01-06 17:11:50,946 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 17:11:50,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:11:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 17:11:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-01-06 17:11:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 17:11:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-01-06 17:11:50,961 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 45 [2021-01-06 17:11:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:11:50,961 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-01-06 17:11:50,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:11:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-01-06 17:11:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 17:11:50,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:11:50,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:11:51,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:11:51,180 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:11:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:11:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1592678165, now seen corresponding path program 7 times [2021-01-06 17:11:51,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:11:51,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577804975] [2021-01-06 17:11:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:11:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 17:11:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577804975] [2021-01-06 17:11:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864117309] [2021-01-06 17:11:51,306 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 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 17:11:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:11:51,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 125 conjunts are in the unsatisfiable core [2021-01-06 17:11:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:11:51,475 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-06 17:11:51,476 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:51,488 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-01-06 17:11:51,489 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,499 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:51,500 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,500 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:18 [2021-01-06 17:11:51,538 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:51,538 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-01-06 17:11:51,540 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:51,541 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,551 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:51,555 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-01-06 17:11:51,556 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,566 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:51,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,567 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-01-06 17:11:51,635 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-01-06 17:11:51,637 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,648 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:51,649 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,649 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:40 [2021-01-06 17:11:51,717 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-01-06 17:11:51,718 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,731 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:51,732 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,732 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:40 [2021-01-06 17:11:51,799 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-01-06 17:11:51,800 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:51,829 INFO L625 ElimStorePlain]: treesize reduction 3, result has 93.2 percent of original size [2021-01-06 17:11:51,830 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:51,831 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:41 [2021-01-06 17:11:52,033 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 62 [2021-01-06 17:11:52,034 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:52,056 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:52,058 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:52,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:99, output treesize:88 [2021-01-06 17:11:52,144 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2021-01-06 17:11:52,146 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:52,167 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:52,170 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:52,171 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:111, output treesize:153 [2021-01-06 17:11:52,368 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2021-01-06 17:11:52,369 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:52,384 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:52,385 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:52,386 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:69 [2021-01-06 17:11:52,613 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2021-01-06 17:11:52,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:52,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:11:52,635 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:52,636 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:82, output treesize:74 [2021-01-06 17:11:53,014 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 78 [2021-01-06 17:11:53,016 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:11:53,047 INFO L625 ElimStorePlain]: treesize reduction 3, result has 98.2 percent of original size [2021-01-06 17:11:53,050 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-01-06 17:11:53,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:163 [2021-01-06 17:11:53,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:53,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:53,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:53,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:53,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:11:53,534 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:11:53,536 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:11:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:11:53,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:11:53,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 29] total 36 [2021-01-06 17:11:53,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333844379] [2021-01-06 17:11:53,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:11:53,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:11:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:11:53,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:11:53,632 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 36 states. [2021-01-06 17:11:56,372 WARN L197 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-01-06 17:11:56,701 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-01-06 17:11:56,889 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-01-06 17:11:57,795 WARN L197 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-01-06 17:11:58,028 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-01-06 17:11:58,206 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-01-06 17:11:59,146 WARN L197 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-01-06 17:12:00,038 WARN L197 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-01-06 17:12:00,358 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-01-06 17:12:00,656 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2021-01-06 17:12:01,650 WARN L197 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-01-06 17:12:02,595 WARN L197 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-01-06 17:12:05,750 WARN L197 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2021-01-06 17:12:07,969 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 108 DAG size of output: 97 [2021-01-06 17:12:08,982 WARN L197 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 100 [2021-01-06 17:12:10,434 WARN L197 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-01-06 17:12:11,914 WARN L197 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2021-01-06 17:12:12,841 WARN L197 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-01-06 17:12:13,058 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2021-01-06 17:12:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:13,281 INFO L93 Difference]: Finished difference Result 144 states and 175 transitions. [2021-01-06 17:12:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 17:12:13,282 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2021-01-06 17:12:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:13,283 INFO L225 Difference]: With dead ends: 144 [2021-01-06 17:12:13,283 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 17:12:13,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=741, Invalid=4089, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 17:12:13,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 17:12:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 60. [2021-01-06 17:12:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 17:12:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-01-06 17:12:13,303 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 48 [2021-01-06 17:12:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:13,303 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-01-06 17:12:13,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:12:13,303 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-01-06 17:12:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 17:12:13,304 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:13,304 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:13,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:13,519 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:13,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2083044420, now seen corresponding path program 8 times [2021-01-06 17:12:13,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:13,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251688415] [2021-01-06 17:12:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:12:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 17:12:13,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251688415] [2021-01-06 17:12:13,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401659159] [2021-01-06 17:12:13,663 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 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 17:12:13,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:12:13,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:13,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:12:13,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 17:12:13,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:12:13,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-01-06 17:12:13,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397194923] [2021-01-06 17:12:13,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:12:13,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:12:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:12:13,896 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 16 states. [2021-01-06 17:12:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:14,233 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-01-06 17:12:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:12:14,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2021-01-06 17:12:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:14,234 INFO L225 Difference]: With dead ends: 79 [2021-01-06 17:12:14,234 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 17:12:14,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:12:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 17:12:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2021-01-06 17:12:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 17:12:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-01-06 17:12:14,254 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 54 [2021-01-06 17:12:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:14,254 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-01-06 17:12:14,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:12:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-01-06 17:12:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 17:12:14,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:14,255 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:14,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:14,470 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:14,471 INFO L82 PathProgramCache]: Analyzing trace with hash -651561883, now seen corresponding path program 9 times [2021-01-06 17:12:14,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:14,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498752012] [2021-01-06 17:12:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:12:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-01-06 17:12:14,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498752012] [2021-01-06 17:12:14,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873840024] [2021-01-06 17:12:14,660 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 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 17:12:14,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:12:14,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:14,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:12:14,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 17:12:15,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:12:15,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-01-06 17:12:15,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467361335] [2021-01-06 17:12:15,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:12:15,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:15,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:12:15,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:12:15,615 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 26 states. [2021-01-06 17:12:16,091 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-01-06 17:12:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:12:17,835 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2021-01-06 17:12:17,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 17:12:17,836 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2021-01-06 17:12:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:12:17,837 INFO L225 Difference]: With dead ends: 149 [2021-01-06 17:12:17,837 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 17:12:17,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=303, Invalid=1953, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:12:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 17:12:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2021-01-06 17:12:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 17:12:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2021-01-06 17:12:17,862 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 55 [2021-01-06 17:12:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:12:17,863 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2021-01-06 17:12:17,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:12:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2021-01-06 17:12:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 17:12:17,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:12:17,863 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:12:18,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:12:18,067 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:12:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:12:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1276165686, now seen corresponding path program 10 times [2021-01-06 17:12:18,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:12:18,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775447115] [2021-01-06 17:12:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:12:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:12:20,341 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-01-06 17:12:21,052 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-01-06 17:12:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:12:21,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775447115] [2021-01-06 17:12:21,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553347932] [2021-01-06 17:12:21,708 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 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 [2021-01-06 17:12:21,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:12:21,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:12:21,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 142 conjunts are in the unsatisfiable core [2021-01-06 17:12:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:12:21,887 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-06 17:12:21,888 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:21,894 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:21,898 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-01-06 17:12:21,899 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:21,906 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:21,907 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:12:21,907 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2021-01-06 17:12:21,926 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:21,926 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-01-06 17:12:21,928 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:12:21,929 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:21,938 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:21,942 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-01-06 17:12:21,943 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:21,951 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:21,952 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:12:21,953 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-01-06 17:12:22,107 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-01-06 17:12:22,108 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:22,120 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:22,121 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:12:22,121 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:37 [2021-01-06 17:12:22,275 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-01-06 17:12:22,277 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:22,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:22,289 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:12:22,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-01-06 17:12:22,449 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-01-06 17:12:22,450 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:22,462 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:22,462 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:12:22,463 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-01-06 17:12:22,645 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-01-06 17:12:22,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:22,658 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:22,660 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:12:22,661 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:38 [2021-01-06 17:12:23,178 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-01-06 17:12:23,179 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:23,201 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:23,203 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 17:12:23,203 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:70 [2021-01-06 17:12:23,759 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-01-06 17:12:23,776 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 64 [2021-01-06 17:12:23,778 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:23,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:23,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 17:12:23,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:108, output treesize:146 [2021-01-06 17:12:25,343 WARN L197 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-01-06 17:12:26,216 WARN L197 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-01-06 17:12:26,854 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-01-06 17:12:26,874 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 120 [2021-01-06 17:12:26,875 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:26,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:26,902 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-01-06 17:12:26,902 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:155, output treesize:305 [2021-01-06 17:12:27,046 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-01-06 17:12:27,047 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:27,060 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:27,061 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:12:27,061 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:37 [2021-01-06 17:12:27,325 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2021-01-06 17:12:27,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:27,347 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:27,348 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 17:12:27,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:120 [2021-01-06 17:12:27,683 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:12:27,686 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:27,699 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:28,899 WARN L197 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-01-06 17:12:28,923 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 157 [2021-01-06 17:12:28,924 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:28,988 INFO L625 ElimStorePlain]: treesize reduction 21, result has 95.6 percent of original size [2021-01-06 17:12:28,991 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 17:12:28,992 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:226, output treesize:461 [2021-01-06 17:12:29,215 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 464 treesize of output 456 [2021-01-06 17:12:29,219 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 17:12:29,242 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 17:12:29,244 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 17:12:29,244 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:498, output treesize:1681 [2021-01-06 17:12:29,927 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-01-06 17:12:30,160 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:12:30,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,166 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:12:30,190 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,192 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:12:30,211 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:12:30,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,230 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,234 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 17:12:30,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,247 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,251 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:12:30,260 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,266 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:12:30,282 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:12:30,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,306 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 17:12:30,317 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,319 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,323 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:12:30,332 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,334 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,337 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:12:30,352 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:12:30,355 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2021-01-06 17:12:30,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,387 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:12:30,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:12:30,416 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:12:30,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:12:31,909 WARN L197 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-01-06 17:12:32,916 WARN L197 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-01-06 17:12:34,849 WARN L197 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2021-01-06 17:12:35,864 WARN L197 SmtUtils]: Spent 805.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-01-06 17:12:36,909 WARN L197 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-01-06 17:12:39,008 WARN L197 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 95 [2021-01-06 17:12:40,131 WARN L197 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-01-06 17:12:41,320 WARN L197 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-01-06 17:12:42,516 WARN L197 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-01-06 17:12:42,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:12:42,534 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:12:42,536 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:12:42,542 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:12:42,545 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:12:42,546 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:12:42,549 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2021-01-06 17:12:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 17:12:42,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:12:42,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 69 [2021-01-06 17:12:42,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622280515] [2021-01-06 17:12:42,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 17:12:42,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:12:42,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 17:12:42,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=4424, Unknown=2, NotChecked=0, Total=4692 [2021-01-06 17:12:42,721 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 69 states. [2021-01-06 17:12:45,573 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2021-01-06 17:12:46,011 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2021-01-06 17:12:47,856 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-01-06 17:12:48,752 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2021-01-06 17:12:49,053 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2021-01-06 17:12:49,901 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-01-06 17:12:50,191 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2021-01-06 17:12:50,435 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-01-06 17:12:50,916 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 72 [2021-01-06 17:12:51,568 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 76 [2021-01-06 17:12:53,394 WARN L197 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 197 DAG size of output: 106 [2021-01-06 17:12:55,221 WARN L197 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 198 DAG size of output: 102 [2021-01-06 17:12:57,047 WARN L197 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 240 DAG size of output: 136 [2021-01-06 17:12:58,995 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 97 [2021-01-06 17:12:59,553 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 98 [2021-01-06 17:13:00,698 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 130 [2021-01-06 17:13:00,981 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 59 [2021-01-06 17:13:02,761 WARN L197 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 160 DAG size of output: 102 [2021-01-06 17:13:03,413 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 81 [2021-01-06 17:13:04,606 WARN L197 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 109 [2021-01-06 17:13:05,214 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 147 [2021-01-06 17:13:05,724 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 128 [2021-01-06 17:13:06,307 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 74 [2021-01-06 17:13:10,263 WARN L197 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 220 DAG size of output: 174 [2021-01-06 17:13:10,773 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 81 [2021-01-06 17:13:14,492 WARN L197 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 222 DAG size of output: 176 [2021-01-06 17:13:17,347 WARN L197 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 247 DAG size of output: 176 [2021-01-06 17:13:17,643 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 54 [2021-01-06 17:13:20,597 WARN L197 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 249 DAG size of output: 178 [2021-01-06 17:13:23,201 WARN L197 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 189 DAG size of output: 137 [2021-01-06 17:13:25,966 WARN L197 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 191 DAG size of output: 139 [2021-01-06 17:13:31,419 WARN L197 SmtUtils]: Spent 5.20 s on a formula simplification. DAG size of input: 224 DAG size of output: 176 [2021-01-06 17:13:37,013 WARN L197 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 251 DAG size of output: 178 [2021-01-06 17:13:41,080 WARN L197 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 193 DAG size of output: 139 [2021-01-06 17:13:44,490 WARN L197 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 224 DAG size of output: 183 [2021-01-06 17:13:47,995 WARN L197 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 251 DAG size of output: 185 [2021-01-06 17:13:51,191 WARN L197 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 193 DAG size of output: 146 [2021-01-06 17:13:53,311 WARN L197 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 182 DAG size of output: 145 [2021-01-06 17:13:55,484 WARN L197 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 209 DAG size of output: 147 [2021-01-06 17:13:55,933 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 71 [2021-01-06 17:13:56,384 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 130 [2021-01-06 17:13:57,684 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 194 DAG size of output: 132 [2021-01-06 17:13:58,074 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 56 [2021-01-06 17:13:58,517 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 131 [2021-01-06 17:14:00,418 WARN L197 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 195 DAG size of output: 133 [2021-01-06 17:14:00,769 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 57 [2021-01-06 17:14:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:00,812 INFO L93 Difference]: Finished difference Result 179 states and 212 transitions. [2021-01-06 17:14:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 17:14:00,812 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 57 [2021-01-06 17:14:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:00,814 INFO L225 Difference]: With dead ends: 179 [2021-01-06 17:14:00,814 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 17:14:00,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3488 ImplicationChecksByTransitivity, 92.4s TimeCoverageRelationStatistics Valid=1770, Invalid=13479, Unknown=3, NotChecked=0, Total=15252 [2021-01-06 17:14:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 17:14:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 78. [2021-01-06 17:14:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 17:14:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-01-06 17:14:00,853 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 57 [2021-01-06 17:14:00,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:00,853 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-01-06 17:14:00,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 17:14:00,853 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-01-06 17:14:00,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 17:14:00,854 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:00,854 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:14:01,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 17:14:01,069 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:01,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1842822072, now seen corresponding path program 11 times [2021-01-06 17:14:01,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:01,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891748171] [2021-01-06 17:14:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-01-06 17:14:01,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891748171] [2021-01-06 17:14:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503209380] [2021-01-06 17:14:01,232 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:14:01,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 17:14:01,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:14:01,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:14:01,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:14:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 17:14:02,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:14:02,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-01-06 17:14:02,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498844436] [2021-01-06 17:14:02,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:14:02,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:14:02,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:14:02,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:14:02,079 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 20 states. [2021-01-06 17:14:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:02,405 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2021-01-06 17:14:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:14:02,406 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2021-01-06 17:14:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:02,407 INFO L225 Difference]: With dead ends: 140 [2021-01-06 17:14:02,407 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 17:14:02,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:14:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 17:14:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-01-06 17:14:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 17:14:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2021-01-06 17:14:02,441 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 65 [2021-01-06 17:14:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:02,441 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2021-01-06 17:14:02,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:14:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2021-01-06 17:14:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 17:14:02,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:02,442 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:14:02,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:14:02,656 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:02,657 INFO L82 PathProgramCache]: Analyzing trace with hash -191400998, now seen corresponding path program 12 times [2021-01-06 17:14:02,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:02,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351334488] [2021-01-06 17:14:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-01-06 17:14:02,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351334488] [2021-01-06 17:14:02,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726479090] [2021-01-06 17:14:02,818 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:14:03,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 17:14:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:14:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:14:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:14:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 17:14:03,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:14:03,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-01-06 17:14:03,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514280067] [2021-01-06 17:14:03,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:14:03,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:14:03,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:14:03,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:14:03,555 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand 18 states. [2021-01-06 17:14:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:03,958 INFO L93 Difference]: Finished difference Result 132 states and 156 transitions. [2021-01-06 17:14:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:14:03,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2021-01-06 17:14:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:03,960 INFO L225 Difference]: With dead ends: 132 [2021-01-06 17:14:03,960 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 17:14:03,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:14:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 17:14:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 17:14:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 17:14:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-01-06 17:14:03,983 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 67 [2021-01-06 17:14:03,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:03,983 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-01-06 17:14:03,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:14:03,983 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-01-06 17:14:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 17:14:03,984 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:03,984 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:14:04,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 17:14:04,186 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1348867972, now seen corresponding path program 13 times [2021-01-06 17:14:04,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:04,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712526681] [2021-01-06 17:14:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 17:14:04,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712526681] [2021-01-06 17:14:04,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930525722] [2021-01-06 17:14:04,324 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:14:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:14:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:14:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 17:14:04,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:14:04,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-01-06 17:14:04,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620980630] [2021-01-06 17:14:04,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:14:04,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:14:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:14:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:14:04,597 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 16 states. [2021-01-06 17:14:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:04,861 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2021-01-06 17:14:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:14:04,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2021-01-06 17:14:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:04,863 INFO L225 Difference]: With dead ends: 113 [2021-01-06 17:14:04,863 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 17:14:04,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:14:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 17:14:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-01-06 17:14:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 17:14:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-01-06 17:14:04,895 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 68 [2021-01-06 17:14:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:04,895 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-01-06 17:14:04,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:14:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-01-06 17:14:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 17:14:04,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:04,896 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:14:05,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 17:14:05,109 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:05,110 INFO L82 PathProgramCache]: Analyzing trace with hash 201069710, now seen corresponding path program 14 times [2021-01-06 17:14:05,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:05,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053520686] [2021-01-06 17:14:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 17:14:05,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053520686] [2021-01-06 17:14:05,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113903639] [2021-01-06 17:14:05,216 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:14:05,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:14:05,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:14:05,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:14:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:14:05,397 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:14:05,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:14:05,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:14:05,409 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:14:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-01-06 17:14:05,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:14:05,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 17:14:05,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257432065] [2021-01-06 17:14:05,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:14:05,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:14:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:14:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:14:05,461 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 11 states. [2021-01-06 17:14:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:14:05,653 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2021-01-06 17:14:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:14:05,654 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2021-01-06 17:14:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:14:05,655 INFO L225 Difference]: With dead ends: 116 [2021-01-06 17:14:05,655 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 17:14:05,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:14:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 17:14:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2021-01-06 17:14:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 17:14:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-01-06 17:14:05,690 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 71 [2021-01-06 17:14:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:14:05,690 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-01-06 17:14:05,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:14:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-01-06 17:14:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 17:14:05,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:14:05,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:14:05,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 17:14:05,906 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:14:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:14:05,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1437033862, now seen corresponding path program 15 times [2021-01-06 17:14:05,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:14:05,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51164829] [2021-01-06 17:14:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:14:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:14:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 17:14:06,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51164829] [2021-01-06 17:14:06,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241308590] [2021-01-06 17:14:06,163 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:14:06,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:14:06,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:14:06,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:14:06,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:14:07,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 17:14:07,146 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:14:07,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 17:14:07,152 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 17:14:07,154 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 17:14:07,157 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:14:07,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts