/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-fpi/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:12:32,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:12:32,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:12:32,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:12:32,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:12:32,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:12:32,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:12:32,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:12:32,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:12:32,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:12:32,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:12:32,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:12:32,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:12:32,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:12:32,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:12:32,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:12:32,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:12:32,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:12:32,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:12:32,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:12:32,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:12:32,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:12:32,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:12:32,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:12:32,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:12:32,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:12:32,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:12:32,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:12:32,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:12:32,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:12:32,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:12:32,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:12:32,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:12:32,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:12:32,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:12:32,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:12:32,290 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 11:12:32,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:12:32,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:12:32,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:12:32,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:12:32,329 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:12:32,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:12:32,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:12:32,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:12:32,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:12:32,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:12:32,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:12:32,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:12:32,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:12:32,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:12:32,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:12:32,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:12:32,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:12:32,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:12:32,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:12:32,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:12:32,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:12:32,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:12:32,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:12:32,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:12:32,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:12:32,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:12:32,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:12:32,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:12:32,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:12:32,855 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:12:32,856 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:12:32,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcompf.c [2021-01-06 11:12:32,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c0529a7ce/38d86bf3ada244e1ad0044b728dc132f/FLAG332ede708 [2021-01-06 11:12:33,637 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:12:33,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c [2021-01-06 11:12:33,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c0529a7ce/38d86bf3ada244e1ad0044b728dc132f/FLAG332ede708 [2021-01-06 11:12:34,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c0529a7ce/38d86bf3ada244e1ad0044b728dc132f [2021-01-06 11:12:34,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:12:34,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:12:34,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:12:34,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:12:34,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:12:34,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b647b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34, skipping insertion in model container [2021-01-06 11:12:34,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:12:34,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:12:34,209 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-fpi/ifcompf.c[590,603] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],StructAccessExpression[IdentifierExpression[~a~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],StructAccessExpression[IdentifierExpression[~b~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],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[~c~0,],base],StructAccessExpression[IdentifierExpression[~c~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~c~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~c~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:12:34,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:12:34,269 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:12:34,296 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-fpi/ifcompf.c[590,603] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],StructAccessExpression[IdentifierExpression[~a~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],StructAccessExpression[IdentifierExpression[~b~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],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[~c~0,],base],StructAccessExpression[IdentifierExpression[~c~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~c~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~c~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:12:34,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:12:34,379 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:12:34,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34 WrapperNode [2021-01-06 11:12:34,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:12:34,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:12:34,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:12:34,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:12:34,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:12:34,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:12:34,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:12:34,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:12:34,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (1/1) ... [2021-01-06 11:12:34,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:12:34,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:12:34,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:12:34,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:12:34,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (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 11:12:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:12:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:12:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:12:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:12:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:12:34,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:12:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:12:35,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:12:35,137 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 11:12:35,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:12:35 BoogieIcfgContainer [2021-01-06 11:12:35,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:12:35,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:12:35,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:12:35,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:12:35,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:12:34" (1/3) ... [2021-01-06 11:12:35,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4b9633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:12:35, skipping insertion in model container [2021-01-06 11:12:35,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:12:34" (2/3) ... [2021-01-06 11:12:35,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4b9633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:12:35, skipping insertion in model container [2021-01-06 11:12:35,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:12:35" (3/3) ... [2021-01-06 11:12:35,149 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2021-01-06 11:12:35,159 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:12:35,164 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:12:35,187 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:12:35,218 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:12:35,218 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:12:35,218 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:12:35,218 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:12:35,219 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:12:35,219 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:12:35,219 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:12:35,219 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:12:35,239 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 11:12:35,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:12:35,246 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:35,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:12:35,247 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:35,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2021-01-06 11:12:35,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:35,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750999866] [2021-01-06 11:12:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:12:35,470 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 11:12:35,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750999866] [2021-01-06 11:12:35,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:12:35,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:12:35,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336220760] [2021-01-06 11:12:35,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:12:35,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:35,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:12:35,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:12:35,494 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2021-01-06 11:12:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:35,513 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2021-01-06 11:12:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:12:35,514 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2021-01-06 11:12:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:35,523 INFO L225 Difference]: With dead ends: 50 [2021-01-06 11:12:35,524 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 11:12:35,527 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 11:12:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 11:12:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 11:12:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:12:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-01-06 11:12:35,565 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2021-01-06 11:12:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:35,566 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-01-06 11:12:35,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:12:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-01-06 11:12:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:12:35,567 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:35,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:12:35,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:12:35,568 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2021-01-06 11:12:35,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:35,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447565407] [2021-01-06 11:12:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:12:35,728 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 11:12:35,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447565407] [2021-01-06 11:12:35,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:12:35,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:12:35,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231940737] [2021-01-06 11:12:35,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:12:35,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:35,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:12:35,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:12:35,733 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 4 states. [2021-01-06 11:12:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:35,879 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-01-06 11:12:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:12:35,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-01-06 11:12:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:35,882 INFO L225 Difference]: With dead ends: 56 [2021-01-06 11:12:35,882 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 11:12:35,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:12:35,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 11:12:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-01-06 11:12:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 11:12:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-06 11:12:35,892 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2021-01-06 11:12:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:35,892 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-06 11:12:35,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:12:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-06 11:12:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 11:12:35,894 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:35,894 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 11:12:35,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:12:35,894 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:35,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2021-01-06 11:12:35,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:35,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534880112] [2021-01-06 11:12:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:35,924 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:35,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23727295] [2021-01-06 11:12:35,925 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 11:12:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:12:36,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:12:36,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:12:36,246 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 11 treesize of output 7 [2021-01-06 11:12:36,248 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:36,253 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:36,254 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:36,254 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-01-06 11:12:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:12:36,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534880112] [2021-01-06 11:12:36,328 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:12:36,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23727295] [2021-01-06 11:12:36,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:12:36,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 11:12:36,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628612758] [2021-01-06 11:12:36,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:12:36,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:12:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:12:36,331 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 9 states. [2021-01-06 11:12:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:37,009 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-01-06 11:12:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:12:37,010 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2021-01-06 11:12:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:37,011 INFO L225 Difference]: With dead ends: 56 [2021-01-06 11:12:37,011 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 11:12:37,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:12:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 11:12:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2021-01-06 11:12:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 11:12:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-01-06 11:12:37,020 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2021-01-06 11:12:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:37,020 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-01-06 11:12:37,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:12:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-01-06 11:12:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 11:12:37,022 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:37,022 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 11:12:37,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 11:12:37,236 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash -100913581, now seen corresponding path program 1 times [2021-01-06 11:12:37,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:37,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111786361] [2021-01-06 11:12:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:37,261 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:37,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20553885] [2021-01-06 11:12:37,261 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 11:12:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:12:37,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:12:37,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:12:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 11:12:37,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111786361] [2021-01-06 11:12:37,570 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:12:37,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20553885] [2021-01-06 11:12:37,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:12:37,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 11:12:37,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729591402] [2021-01-06 11:12:37,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:12:37,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:12:37,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:12:37,578 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2021-01-06 11:12:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:37,784 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-01-06 11:12:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:12:37,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2021-01-06 11:12:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:37,786 INFO L225 Difference]: With dead ends: 87 [2021-01-06 11:12:37,786 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 11:12:37,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:12:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 11:12:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-01-06 11:12:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 11:12:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-01-06 11:12:37,794 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-01-06 11:12:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:37,794 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-01-06 11:12:37,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:12:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-01-06 11:12:37,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 11:12:37,796 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:37,796 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] [2021-01-06 11:12:38,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:12:38,011 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2021-01-06 11:12:38,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:38,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450542287] [2021-01-06 11:12:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:38,059 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:38,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139474554] [2021-01-06 11:12:38,059 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 11:12:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:12:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 11:12:38,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:12:38,202 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-01-06 11:12:38,207 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:38,214 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:38,216 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:38,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:8 [2021-01-06 11:12:38,301 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-01-06 11:12:38,302 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:38,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:38,312 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:38,313 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 11:12:38,547 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-01-06 11:12:38,549 INFO L348 Elim1Store]: treesize reduction 76, result has 62.0 percent of original size [2021-01-06 11:12:38,550 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 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 140 [2021-01-06 11:12:38,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:38,624 INFO L625 ElimStorePlain]: treesize reduction 96, result has 36.8 percent of original size [2021-01-06 11:12:38,637 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:38,638 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:12 [2021-01-06 11:12:38,676 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 19 treesize of output 18 [2021-01-06 11:12:38,678 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:38,686 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:38,687 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 11:12:38,688 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2021-01-06 11:12:38,755 INFO L348 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-01-06 11:12:38,755 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 1 case distinctions, treesize of input 38 treesize of output 32 [2021-01-06 11:12:38,758 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 11:12:38,766 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 11:12:38,769 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 11:12:38,770 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:28 [2021-01-06 11:12:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:12:38,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450542287] [2021-01-06 11:12:38,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:12:38,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139474554] [2021-01-06 11:12:38,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:12:38,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 11:12:38,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678273435] [2021-01-06 11:12:38,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:12:38,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:38,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:12:38,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:12:38,956 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2021-01-06 11:12:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:39,466 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2021-01-06 11:12:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:12:39,467 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2021-01-06 11:12:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:39,468 INFO L225 Difference]: With dead ends: 80 [2021-01-06 11:12:39,468 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 11:12:39,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:12:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 11:12:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-01-06 11:12:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 11:12:39,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-01-06 11:12:39,476 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 36 [2021-01-06 11:12:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:39,477 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-01-06 11:12:39,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:12:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-01-06 11:12:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 11:12:39,478 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:39,478 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-01-06 11:12:39,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:12:39,693 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:39,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1866238698, now seen corresponding path program 2 times [2021-01-06 11:12:39,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:39,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981098981] [2021-01-06 11:12:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:39,718 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:39,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757489092] [2021-01-06 11:12:39,719 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 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 11:12:39,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:12:39,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:12:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:12:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:12:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 11:12:40,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981098981] [2021-01-06 11:12:40,014 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 11:12:40,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757489092] [2021-01-06 11:12:40,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:12:40,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 11:12:40,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849070152] [2021-01-06 11:12:40,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:12:40,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:12:40,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:12:40,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:12:40,016 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 9 states. [2021-01-06 11:12:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:12:40,257 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-01-06 11:12:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:12:40,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2021-01-06 11:12:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:12:40,262 INFO L225 Difference]: With dead ends: 116 [2021-01-06 11:12:40,262 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 11:12:40,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:12:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 11:12:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2021-01-06 11:12:40,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 11:12:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-01-06 11:12:40,280 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 40 [2021-01-06 11:12:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:12:40,280 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-01-06 11:12:40,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:12:40,280 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-01-06 11:12:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:12:40,282 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:12:40,282 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:12:40,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:12:40,489 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:12:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:12:40,490 INFO L82 PathProgramCache]: Analyzing trace with hash 132233513, now seen corresponding path program 3 times [2021-01-06 11:12:40,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:12:40,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749350226] [2021-01-06 11:12:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:12:40,531 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:12:40,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420674081] [2021-01-06 11:12:40,531 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 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 11:12:40,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:12:40,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-01-06 11:12:40,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:12:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:12:40,758 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:12:40,874 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 11:12:40,874 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 11:12:41,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 11:12:41,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 11:12:41 BoogieIcfgContainer [2021-01-06 11:12:41,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 11:12:41,159 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 11:12:41,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 11:12:41,159 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 11:12:41,159 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:12:35" (3/4) ... [2021-01-06 11:12:41,162 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 11:12:41,257 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-fpi/ifcompf.c-witness.graphml [2021-01-06 11:12:41,257 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 11:12:41,261 INFO L168 Benchmark]: Toolchain (without parser) took 7247.22 ms. Allocated memory was 154.1 MB in the beginning and 187.7 MB in the end (delta: 33.6 MB). Free memory was 130.6 MB in the beginning and 128.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 36.5 MB. Max. memory is 8.0 GB. [2021-01-06 11:12:41,261 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 154.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:12:41,262 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.93 ms. Allocated memory is still 154.1 MB. Free memory was 130.2 MB in the beginning and 119.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 11:12:41,263 INFO L168 Benchmark]: Boogie Procedure Inliner took 91.85 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 117.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:12:41,265 INFO L168 Benchmark]: Boogie Preprocessor took 62.42 ms. Allocated memory is still 154.1 MB. Free memory was 117.7 MB in the beginning and 116.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:12:41,268 INFO L168 Benchmark]: RCFGBuilder took 602.36 ms. Allocated memory is still 154.1 MB. Free memory was 116.5 MB in the beginning and 131.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:12:41,269 INFO L168 Benchmark]: TraceAbstraction took 6017.08 ms. Allocated memory was 154.1 MB in the beginning and 187.7 MB in the end (delta: 33.6 MB). Free memory was 131.4 MB in the beginning and 134.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:12:41,269 INFO L168 Benchmark]: Witness Printer took 98.40 ms. Allocated memory is still 187.7 MB. Free memory was 134.0 MB in the beginning and 128.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-01-06 11:12:41,281 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 154.1 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 366.93 ms. Allocated memory is still 154.1 MB. Free memory was 130.2 MB in the beginning and 119.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 91.85 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 117.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.42 ms. Allocated memory is still 154.1 MB. Free memory was 117.7 MB in the beginning and 116.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 602.36 ms. Allocated memory is still 154.1 MB. Free memory was 116.5 MB in the beginning and 131.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6017.08 ms. Allocated memory was 154.1 MB in the beginning and 187.7 MB in the end (delta: 33.6 MB). Free memory was 131.4 MB in the beginning and 134.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 32.0 MB. Max. memory is 8.0 GB. * Witness Printer took 98.40 ms. Allocated memory is still 187.7 MB. Free memory was 134.0 MB in the beginning and 128.8 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=3] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] i=0 VAL [N=3] [L32] COND TRUE i