/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:42:23,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:42:23,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:42:24,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:42:24,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:42:24,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:42:24,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:42:24,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:42:24,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:42:24,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:42:24,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:42:24,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:42:24,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:42:24,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:42:24,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:42:24,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:42:24,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:42:24,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:42:24,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:42:24,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:42:24,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:42:24,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:42:24,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:42:24,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:42:24,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:42:24,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:42:24,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:42:24,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:42:24,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:42:24,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:42:24,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:42:24,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:42:24,098 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:42:24,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:42:24,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:42:24,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:42:24,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:42:24,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:42:24,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:42:24,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:42:24,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:42:24,130 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:42:24,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:42:24,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:42:24,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:42:24,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:42:24,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:42:24,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:42:24,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:42:24,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:42:24,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:42:24,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:42:24,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:42:24,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:42:24,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:24,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:42:24,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:42:24,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:42:24,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:42:24,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:42:24,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:42:24,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:42:24,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:42:24,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:42:24,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:42:24,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:42:24,549 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:42:24,550 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:42:24,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy5_ground-1.i [2021-01-06 09:42:24,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8273d615/210a061454e64255a1dcc9e9f7a2db9d/FLAGc58232e34 [2021-01-06 09:42:25,391 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:42:25,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-1.i [2021-01-06 09:42:25,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8273d615/210a061454e64255a1dcc9e9f7a2db9d/FLAGc58232e34 [2021-01-06 09:42:25,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8273d615/210a061454e64255a1dcc9e9f7a2db9d [2021-01-06 09:42:25,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:42:25,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:42:25,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:25,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:42:25,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:42:25,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:25" (1/1) ... [2021-01-06 09:42:25,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42909ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:25, skipping insertion in model container [2021-01-06 09:42:25,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:25" (1/1) ... [2021-01-06 09:42:25,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:42:25,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:42:25,929 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a5~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a6~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:25,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:25,964 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:42:25,979 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a5~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a5~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a6~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a6~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:25,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:26,008 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:42:26,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26 WrapperNode [2021-01-06 09:42:26,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:26,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:26,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:42:26,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:42:26,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... [2021-01-06 09:42:26,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... [2021-01-06 09:42:26,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:26,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:42:26,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:42:26,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:42:26,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... [2021-01-06 09:42:26,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... [2021-01-06 09:42:26,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... [2021-01-06 09:42:26,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... [2021-01-06 09:42:26,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... [2021-01-06 09:42:26,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... [2021-01-06 09:42:26,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... [2021-01-06 09:42:26,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:42:26,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:42:26,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:42:26,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:42:26,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:26,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:42:26,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:42:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:42:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:42:26,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:42:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:42:26,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:42:26,639 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:42:26,639 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 09:42:26,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:26 BoogieIcfgContainer [2021-01-06 09:42:26,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:42:26,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:42:26,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:42:26,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:42:26,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:42:25" (1/3) ... [2021-01-06 09:42:26,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251fec27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:26, skipping insertion in model container [2021-01-06 09:42:26,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:26" (2/3) ... [2021-01-06 09:42:26,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251fec27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:26, skipping insertion in model container [2021-01-06 09:42:26,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:26" (3/3) ... [2021-01-06 09:42:26,652 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-1.i [2021-01-06 09:42:26,663 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:42:26,673 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:42:26,699 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:42:26,730 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:42:26,730 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:42:26,731 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:42:26,731 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:42:26,731 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:42:26,731 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:42:26,731 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:42:26,731 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:42:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-01-06 09:42:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 09:42:26,755 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:26,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:26,756 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:26,764 INFO L82 PathProgramCache]: Analyzing trace with hash -18882701, now seen corresponding path program 1 times [2021-01-06 09:42:26,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:26,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592680055] [2021-01-06 09:42:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:27,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592680055] [2021-01-06 09:42:27,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:42:27,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:42:27,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450065064] [2021-01-06 09:42:27,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:27,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:27,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:27,117 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2021-01-06 09:42:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:27,162 INFO L93 Difference]: Finished difference Result 58 states and 86 transitions. [2021-01-06 09:42:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:27,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 09:42:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:27,188 INFO L225 Difference]: With dead ends: 58 [2021-01-06 09:42:27,189 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 09:42:27,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 09:42:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 09:42:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 09:42:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-01-06 09:42:27,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-01-06 09:42:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:27,260 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-01-06 09:42:27,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-01-06 09:42:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:42:27,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:27,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:27,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:42:27,265 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:27,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1592499797, now seen corresponding path program 1 times [2021-01-06 09:42:27,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:27,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441230434] [2021-01-06 09:42:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:27,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441230434] [2021-01-06 09:42:27,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608246795] [2021-01-06 09:42:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:42:27,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:27,555 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 09:42:27,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:42:27,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:42:27,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315547469] [2021-01-06 09:42:27,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:27,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:27,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:27,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:27,560 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2021-01-06 09:42:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:27,650 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-01-06 09:42:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:27,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 09:42:27,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:27,652 INFO L225 Difference]: With dead ends: 56 [2021-01-06 09:42:27,653 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 09:42:27,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 09:42:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-01-06 09:42:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 09:42:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-01-06 09:42:27,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2021-01-06 09:42:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:27,661 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-01-06 09:42:27,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-01-06 09:42:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 09:42:27,663 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:27,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:27,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:42:27,878 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:27,880 INFO L82 PathProgramCache]: Analyzing trace with hash 722749857, now seen corresponding path program 1 times [2021-01-06 09:42:27,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:27,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106512537] [2021-01-06 09:42:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:42:27,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106512537] [2021-01-06 09:42:27,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665623181] [2021-01-06 09:42:27,972 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:28,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:28,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:42:28,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:28,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253011099] [2021-01-06 09:42:28,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:28,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:28,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:28,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:28,125 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2021-01-06 09:42:28,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:28,152 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2021-01-06 09:42:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:28,153 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2021-01-06 09:42:28,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:28,154 INFO L225 Difference]: With dead ends: 62 [2021-01-06 09:42:28,154 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 09:42:28,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 09:42:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 09:42:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 09:42:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-01-06 09:42:28,161 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2021-01-06 09:42:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:28,162 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-01-06 09:42:28,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-01-06 09:42:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 09:42:28,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:28,163 INFO L422 BasicCegarLoop]: trace histogram [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 09:42:28,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:28,377 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:28,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1187353633, now seen corresponding path program 2 times [2021-01-06 09:42:28,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:28,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736160526] [2021-01-06 09:42:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 09:42:28,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736160526] [2021-01-06 09:42:28,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158149335] [2021-01-06 09:42:28,433 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:28,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:28,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:28,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:28,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 09:42:28,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:28,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 09:42:28,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745488388] [2021-01-06 09:42:28,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:42:28,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:28,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:42:28,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:28,582 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2021-01-06 09:42:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:28,683 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2021-01-06 09:42:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:42:28,683 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 09:42:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:28,684 INFO L225 Difference]: With dead ends: 79 [2021-01-06 09:42:28,685 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:42:28,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:42:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-01-06 09:42:28,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 09:42:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-01-06 09:42:28,693 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2021-01-06 09:42:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:28,693 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-01-06 09:42:28,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:42:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-01-06 09:42:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 09:42:28,695 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:28,695 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 09:42:28,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:28,911 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1347184621, now seen corresponding path program 3 times [2021-01-06 09:42:28,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:28,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562773557] [2021-01-06 09:42:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 09:42:29,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562773557] [2021-01-06 09:42:29,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792837447] [2021-01-06 09:42:29,064 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:29,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:42:29,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:29,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:42:29,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:29,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-01-06 09:42:29,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144247841] [2021-01-06 09:42:29,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:42:29,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:42:29,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:42:29,271 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2021-01-06 09:42:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:29,439 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2021-01-06 09:42:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:42:29,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2021-01-06 09:42:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:29,442 INFO L225 Difference]: With dead ends: 101 [2021-01-06 09:42:29,442 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:42:29,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:42:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:42:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2021-01-06 09:42:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 09:42:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-01-06 09:42:29,452 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 43 [2021-01-06 09:42:29,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:29,452 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-01-06 09:42:29,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:42:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-01-06 09:42:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 09:42:29,454 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:29,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:29,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:29,661 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:29,662 INFO L82 PathProgramCache]: Analyzing trace with hash 604038727, now seen corresponding path program 4 times [2021-01-06 09:42:29,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:29,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293265066] [2021-01-06 09:42:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:29,842 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 09:42:29,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293265066] [2021-01-06 09:42:29,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959170382] [2021-01-06 09:42:29,844 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:29,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:29,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:29,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:42:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 09:42:30,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:30,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:42:30,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956078652] [2021-01-06 09:42:30,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:42:30,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:30,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:42:30,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:42:30,008 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 8 states. [2021-01-06 09:42:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:30,042 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2021-01-06 09:42:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:42:30,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2021-01-06 09:42:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:30,044 INFO L225 Difference]: With dead ends: 108 [2021-01-06 09:42:30,044 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 09:42:30,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:42:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 09:42:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-01-06 09:42:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 09:42:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-01-06 09:42:30,052 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 55 [2021-01-06 09:42:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:30,052 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-01-06 09:42:30,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:42:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-01-06 09:42:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:42:30,053 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:30,053 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:30,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:42:30,267 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:30,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1417844485, now seen corresponding path program 5 times [2021-01-06 09:42:30,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:30,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294595191] [2021-01-06 09:42:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 09:42:30,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294595191] [2021-01-06 09:42:30,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294512457] [2021-01-06 09:42:30,427 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:32,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 09:42:32,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:32,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:42:32,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-01-06 09:42:32,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:32,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-01-06 09:42:32,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231035963] [2021-01-06 09:42:32,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:42:32,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:42:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:32,270 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 12 states. [2021-01-06 09:42:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:32,497 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2021-01-06 09:42:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:42:32,498 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2021-01-06 09:42:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:32,499 INFO L225 Difference]: With dead ends: 125 [2021-01-06 09:42:32,499 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 09:42:32,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 09:42:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-01-06 09:42:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:42:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-01-06 09:42:32,507 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 57 [2021-01-06 09:42:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:32,507 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-01-06 09:42:32,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:42:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-01-06 09:42:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 09:42:32,508 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:32,509 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:32,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:32,724 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:32,725 INFO L82 PathProgramCache]: Analyzing trace with hash -371467719, now seen corresponding path program 6 times [2021-01-06 09:42:32,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:32,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689656083] [2021-01-06 09:42:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-01-06 09:42:32,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689656083] [2021-01-06 09:42:32,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469899847] [2021-01-06 09:42:32,898 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:33,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:42:33,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:33,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:42:33,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:42:33,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:33,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-01-06 09:42:33,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622254897] [2021-01-06 09:42:33,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:42:33,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:33,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:42:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:42:33,426 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 14 states. [2021-01-06 09:42:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:33,638 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2021-01-06 09:42:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:42:33,638 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2021-01-06 09:42:33,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:33,639 INFO L225 Difference]: With dead ends: 147 [2021-01-06 09:42:33,639 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 09:42:33,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:42:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 09:42:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-01-06 09:42:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 09:42:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-01-06 09:42:33,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 69 [2021-01-06 09:42:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:33,650 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-01-06 09:42:33,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:42:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-01-06 09:42:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:42:33,652 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:33,652 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:33,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:33,866 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:33,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2082029715, now seen corresponding path program 7 times [2021-01-06 09:42:33,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:33,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343368915] [2021-01-06 09:42:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-01-06 09:42:34,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343368915] [2021-01-06 09:42:34,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866029010] [2021-01-06 09:42:34,026 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:42:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-01-06 09:42:34,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:34,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:42:34,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486901729] [2021-01-06 09:42:34,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:42:34,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:34,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:42:34,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:34,225 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 11 states. [2021-01-06 09:42:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:34,264 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2021-01-06 09:42:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:42:34,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2021-01-06 09:42:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:34,266 INFO L225 Difference]: With dead ends: 154 [2021-01-06 09:42:34,266 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 09:42:34,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:42:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 09:42:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-01-06 09:42:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 09:42:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-01-06 09:42:34,281 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 81 [2021-01-06 09:42:34,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:34,281 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-01-06 09:42:34,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:42:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-01-06 09:42:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 09:42:34,282 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:34,283 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:34,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:42:34,495 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:34,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1792466603, now seen corresponding path program 8 times [2021-01-06 09:42:34,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:34,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992075041] [2021-01-06 09:42:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-01-06 09:42:34,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992075041] [2021-01-06 09:42:34,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24078366] [2021-01-06 09:42:34,667 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:34,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:34,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:42:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-01-06 09:42:34,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:34,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:42:34,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241509260] [2021-01-06 09:42:34,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:42:34,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:34,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:42:34,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:34,942 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 12 states. [2021-01-06 09:42:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:34,988 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-01-06 09:42:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:42:34,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2021-01-06 09:42:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:34,990 INFO L225 Difference]: With dead ends: 156 [2021-01-06 09:42:34,990 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 09:42:34,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:42:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 09:42:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-01-06 09:42:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 09:42:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-01-06 09:42:35,017 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 83 [2021-01-06 09:42:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:35,017 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-01-06 09:42:35,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:42:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-01-06 09:42:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-01-06 09:42:35,019 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:35,025 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:35,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:35,226 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:35,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1446782569, now seen corresponding path program 9 times [2021-01-06 09:42:35,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:35,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905490203] [2021-01-06 09:42:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2021-01-06 09:42:35,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905490203] [2021-01-06 09:42:35,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854262008] [2021-01-06 09:42:35,369 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:36,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:42:36,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:36,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:42:36,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-01-06 09:42:36,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:36,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-01-06 09:42:36,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653215432] [2021-01-06 09:42:36,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:42:36,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:36,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:42:36,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:42:36,617 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 18 states. [2021-01-06 09:42:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:36,842 INFO L93 Difference]: Finished difference Result 173 states and 190 transitions. [2021-01-06 09:42:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:42:36,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2021-01-06 09:42:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:36,843 INFO L225 Difference]: With dead ends: 173 [2021-01-06 09:42:36,844 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 09:42:36,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:42:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 09:42:36,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-01-06 09:42:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 09:42:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2021-01-06 09:42:36,851 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 85 [2021-01-06 09:42:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:36,852 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2021-01-06 09:42:36,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:42:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2021-01-06 09:42:36,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 09:42:36,853 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:36,853 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:37,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:37,067 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:37,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash -137686115, now seen corresponding path program 10 times [2021-01-06 09:42:37,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:37,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171085022] [2021-01-06 09:42:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-01-06 09:42:37,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171085022] [2021-01-06 09:42:37,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081476066] [2021-01-06 09:42:37,231 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:37,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:37,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:37,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:42:37,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-01-06 09:42:37,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:37,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-01-06 09:42:37,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895955013] [2021-01-06 09:42:37,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:42:37,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:37,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:42:37,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:42:37,512 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 20 states. [2021-01-06 09:42:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:37,836 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2021-01-06 09:42:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:42:37,837 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2021-01-06 09:42:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:37,838 INFO L225 Difference]: With dead ends: 195 [2021-01-06 09:42:37,838 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 09:42:37,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:42:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 09:42:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-01-06 09:42:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 09:42:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2021-01-06 09:42:37,844 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 97 [2021-01-06 09:42:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:37,845 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2021-01-06 09:42:37,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:42:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2021-01-06 09:42:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-01-06 09:42:37,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:37,846 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:38,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:42:38,061 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:38,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2116330193, now seen corresponding path program 11 times [2021-01-06 09:42:38,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:38,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708641203] [2021-01-06 09:42:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-01-06 09:42:38,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708641203] [2021-01-06 09:42:38,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108794235] [2021-01-06 09:42:38,233 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 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