/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-dcfa08f [2020-12-23 01:18:22,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:18:22,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:18:22,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:18:22,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:18:22,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:18:22,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:18:22,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:18:22,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:18:22,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:18:22,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:18:22,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:18:22,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:18:22,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:18:22,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:18:22,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:18:22,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:18:22,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:18:22,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:18:22,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:18:22,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:18:22,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:18:22,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:18:22,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:18:22,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:18:22,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 01:18:22,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 01:18:22,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 01:18:22,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 01:18:22,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 01:18:22,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 01:18:22,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 01:18:22,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 01:18:22,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:18:22,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:18:22,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:18:22,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:18:22,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:18:22,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:18:22,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:18:22,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:18:22,604 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:18:22,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:18:22,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:18:22,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:18:22,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:18:22,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:18:22,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:18:22,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:18:22,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:18:22,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:18:22,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:18:22,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:18:22,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:18:22,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:18:22,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:18:22,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:18:22,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:18:22,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:18:22,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:18:22,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:18:22,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:18:22,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:18:22,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:18:23,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:18:23,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:18:23,030 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:18:23,031 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:18:23,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifcompf.c [2020-12-23 01:18:23,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/aa78d3b73/688cd097fc9f4872845ce54405662fc7/FLAG2b06a9d3d [2020-12-23 01:18:23,835 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:18:23,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/ifcompf.c [2020-12-23 01:18:23,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/aa78d3b73/688cd097fc9f4872845ce54405662fc7/FLAG2b06a9d3d [2020-12-23 01:18:24,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/aa78d3b73/688cd097fc9f4872845ce54405662fc7 [2020-12-23 01:18:24,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:18:24,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:18:24,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:18:24,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:18:24,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:18:24,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772f77f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24, skipping insertion in model container [2020-12-23 01:18:24,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:18:24,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:18:24,423 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,] [2020-12-23 01:18:24,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:18:24,496 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:18:24,515 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,] [2020-12-23 01:18:24,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:18:24,586 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:18:24,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24 WrapperNode [2020-12-23 01:18:24,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:18:24,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:18:24,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:18:24,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:18:24,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:18:24,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:18:24,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:18:24,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:18:24,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (1/1) ... [2020-12-23 01:18:24,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:18:24,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:18:24,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:18:24,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:18:24,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (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 [2020-12-23 01:18:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:18:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:18:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:18:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 01:18:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:18:24,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:18:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:18:25,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:18:25,220 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 01:18:25,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:18:25 BoogieIcfgContainer [2020-12-23 01:18:25,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:18:25,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:18:25,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:18:25,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:18:25,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:18:24" (1/3) ... [2020-12-23 01:18:25,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee7008b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:18:25, skipping insertion in model container [2020-12-23 01:18:25,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:18:24" (2/3) ... [2020-12-23 01:18:25,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee7008b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:18:25, skipping insertion in model container [2020-12-23 01:18:25,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:18:25" (3/3) ... [2020-12-23 01:18:25,277 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-12-23 01:18:25,312 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:18:25,323 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:18:25,358 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:18:25,390 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:18:25,390 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:18:25,390 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:18:25,391 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:18:25,391 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:18:25,391 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:18:25,391 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:18:25,391 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:18:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-23 01:18:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 01:18:25,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:18:25,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:18:25,417 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:18:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:18:25,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1152450264, now seen corresponding path program 1 times [2020-12-23 01:18:25,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:18:25,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627990437] [2020-12-23 01:18:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:18:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:18:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:18:25,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627990437] [2020-12-23 01:18:25,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:18:25,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:18:25,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560046310] [2020-12-23 01:18:25,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:18:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:18:25,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:18:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:18:25,675 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-23 01:18:25,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:18:25,697 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2020-12-23 01:18:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:18:25,699 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-23 01:18:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:18:25,710 INFO L225 Difference]: With dead ends: 50 [2020-12-23 01:18:25,710 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 01:18:25,713 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 [2020-12-23 01:18:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 01:18:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 01:18:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 01:18:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-12-23 01:18:25,756 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 14 [2020-12-23 01:18:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:18:25,756 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-12-23 01:18:25,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:18:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-12-23 01:18:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 01:18:25,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:18:25,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:18:25,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:18:25,758 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:18:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:18:25,760 INFO L82 PathProgramCache]: Analyzing trace with hash 670750212, now seen corresponding path program 1 times [2020-12-23 01:18:25,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:18:25,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880776807] [2020-12-23 01:18:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:18:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:18:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:18:25,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880776807] [2020-12-23 01:18:25,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:18:25,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:18:25,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658160943] [2020-12-23 01:18:25,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:18:25,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:18:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:18:25,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:18:25,913 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 4 states. [2020-12-23 01:18:26,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:18:26,070 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-12-23 01:18:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:18:26,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 01:18:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:18:26,072 INFO L225 Difference]: With dead ends: 56 [2020-12-23 01:18:26,072 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 01:18:26,073 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 [2020-12-23 01:18:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 01:18:26,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-12-23 01:18:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 01:18:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-23 01:18:26,082 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2020-12-23 01:18:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:18:26,082 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-23 01:18:26,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:18:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-23 01:18:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:18:26,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:18:26,084 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] [2020-12-23 01:18:26,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:18:26,084 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:18:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:18:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1978137699, now seen corresponding path program 1 times [2020-12-23 01:18:26,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:18:26,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565491753] [2020-12-23 01:18:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:18:26,114 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:18:26,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219162604] [2020-12-23 01:18:26,118 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 [2020-12-23 01:18:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:18:26,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 01:18:26,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:18:26,427 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 [2020-12-23 01:18:26,429 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:18:26,432 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:18:26,433 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:18:26,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-23 01:18:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 01:18:26,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565491753] [2020-12-23 01:18:26,485 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:18:26,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219162604] [2020-12-23 01:18:26,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:18:26,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 01:18:26,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058526151] [2020-12-23 01:18:26,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:18:26,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:18:26,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:18:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:18:26,489 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 9 states. [2020-12-23 01:18:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:18:26,934 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-12-23 01:18:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 01:18:26,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-12-23 01:18:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:18:26,939 INFO L225 Difference]: With dead ends: 56 [2020-12-23 01:18:26,939 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 01:18:26,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-23 01:18:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 01:18:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2020-12-23 01:18:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 01:18:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-23 01:18:26,961 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2020-12-23 01:18:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:18:26,962 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-23 01:18:26,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:18:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-23 01:18:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 01:18:26,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:18:26,966 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] [2020-12-23 01:18:27,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 01:18:27,181 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:18:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:18:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash -100913581, now seen corresponding path program 1 times [2020-12-23 01:18:27,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:18:27,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845906660] [2020-12-23 01:18:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:18:27,205 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:18:27,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614432056] [2020-12-23 01:18:27,206 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 [2020-12-23 01:18:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:18:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 01:18:27,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:18:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 01:18:27,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845906660] [2020-12-23 01:18:27,372 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:18:27,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614432056] [2020-12-23 01:18:27,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:18:27,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 01:18:27,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758692272] [2020-12-23 01:18:27,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 01:18:27,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:18:27,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 01:18:27,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 01:18:27,381 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-12-23 01:18:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:18:27,650 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2020-12-23 01:18:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 01:18:27,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-23 01:18:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:18:27,652 INFO L225 Difference]: With dead ends: 87 [2020-12-23 01:18:27,652 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 01:18:27,653 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 [2020-12-23 01:18:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 01:18:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2020-12-23 01:18:27,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 01:18:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-12-23 01:18:27,660 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2020-12-23 01:18:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:18:27,661 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-12-23 01:18:27,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 01:18:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-12-23 01:18:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 01:18:27,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:18:27,662 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] [2020-12-23 01:18:27,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:18:27,876 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:18:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:18:27,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2051071008, now seen corresponding path program 1 times [2020-12-23 01:18:27,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:18:27,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921026672] [2020-12-23 01:18:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:18:27,924 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:18:27,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806132284] [2020-12-23 01:18:27,924 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 [2020-12-23 01:18:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:18:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 01:18:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:18:28,041 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 [2020-12-23 01:18:28,049 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:18:28,055 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:18:28,058 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:18:28,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:8 [2020-12-23 01:18:28,131 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 [2020-12-23 01:18:28,132 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:18:28,163 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:18:28,165 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:18:28,166 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-23 01:18:28,405 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-12-23 01:18:28,407 INFO L348 Elim1Store]: treesize reduction 76, result has 62.0 percent of original size [2020-12-23 01:18:28,407 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 [2020-12-23 01:18:28,418 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:18:28,488 INFO L625 ElimStorePlain]: treesize reduction 96, result has 36.8 percent of original size [2020-12-23 01:18:28,509 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:18:28,510 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:12 [2020-12-23 01:18:28,566 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 [2020-12-23 01:18:28,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:18:28,578 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:18:28,580 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 01:18:28,581 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 01:18:28,685 INFO L348 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-12-23 01:18:28,690 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 [2020-12-23 01:18:28,693 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 01:18:28,702 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 01:18:28,705 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. [2020-12-23 01:18:28,706 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:28 [2020-12-23 01:18:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:18:28,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921026672] [2020-12-23 01:18:28,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:18:28,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806132284] [2020-12-23 01:18:28,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:18:28,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-23 01:18:28,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044669910] [2020-12-23 01:18:28,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 01:18:28,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:18:28,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 01:18:28,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-23 01:18:28,968 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 16 states. [2020-12-23 01:18:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:18:29,563 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-12-23 01:18:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 01:18:29,564 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-12-23 01:18:29,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:18:29,569 INFO L225 Difference]: With dead ends: 80 [2020-12-23 01:18:29,570 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 01:18:29,571 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 [2020-12-23 01:18:29,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 01:18:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-23 01:18:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 01:18:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-12-23 01:18:29,593 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 36 [2020-12-23 01:18:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:18:29,593 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-12-23 01:18:29,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 01:18:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-12-23 01:18:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 01:18:29,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:18:29,598 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] [2020-12-23 01:18:29,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:18:29,800 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:18:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:18:29,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1866238698, now seen corresponding path program 2 times [2020-12-23 01:18:29,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:18:29,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246496166] [2020-12-23 01:18:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:18:29,845 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:18:29,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064873791] [2020-12-23 01:18:29,846 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 [2020-12-23 01:18:29,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 01:18:29,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 01:18:29,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 01:18:29,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 01:18:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 01:18:30,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246496166] [2020-12-23 01:18:30,059 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 01:18:30,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064873791] [2020-12-23 01:18:30,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 01:18:30,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 01:18:30,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201968872] [2020-12-23 01:18:30,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 01:18:30,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:18:30,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 01:18:30,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 01:18:30,061 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 9 states. [2020-12-23 01:18:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:18:30,301 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2020-12-23 01:18:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 01:18:30,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-12-23 01:18:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:18:30,302 INFO L225 Difference]: With dead ends: 116 [2020-12-23 01:18:30,302 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 01:18:30,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 01:18:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 01:18:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2020-12-23 01:18:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 01:18:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-23 01:18:30,312 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 40 [2020-12-23 01:18:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:18:30,313 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-23 01:18:30,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 01:18:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-23 01:18:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 01:18:30,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:18:30,314 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] [2020-12-23 01:18:30,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 01:18:30,524 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:18:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:18:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash 132233513, now seen corresponding path program 3 times [2020-12-23 01:18:30,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:18:30,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897511373] [2020-12-23 01:18:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:18:30,576 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 01:18:30,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816635031] [2020-12-23 01:18:30,577 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 [2020-12-23 01:18:30,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 01:18:30,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-23 01:18:30,755 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:18:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:18:30,810 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:18:30,947 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 01:18:30,947 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 01:18:31,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 01:18:31,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:18:31 BoogieIcfgContainer [2020-12-23 01:18:31,239 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 01:18:31,240 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 01:18:31,240 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 01:18:31,240 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 01:18:31,241 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:18:25" (3/4) ... [2020-12-23 01:18:31,244 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 01:18:31,386 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-fpi/ifcompf.c-witness.graphml [2020-12-23 01:18:31,386 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 01:18:31,388 INFO L168 Benchmark]: Toolchain (without parser) took 7181.41 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 128.2 MB in the beginning and 136.1 MB in the end (delta: -7.9 MB). Peak memory consumption was 24.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:18:31,388 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:18:31,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.34 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 117.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:18:31,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.66 ms. Allocated memory is still 153.1 MB. Free memory was 117.4 MB in the beginning and 115.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:18:31,390 INFO L168 Benchmark]: Boogie Preprocessor took 37.28 ms. Allocated memory is still 153.1 MB. Free memory was 115.8 MB in the beginning and 114.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:18:31,391 INFO L168 Benchmark]: RCFGBuilder took 523.91 ms. Allocated memory is still 153.1 MB. Free memory was 114.6 MB in the beginning and 97.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-23 01:18:31,391 INFO L168 Benchmark]: TraceAbstraction took 5985.89 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 135.6 MB in the beginning and 141.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 8.0 GB. [2020-12-23 01:18:31,392 INFO L168 Benchmark]: Witness Printer took 146.39 ms. Allocated memory is still 184.5 MB. Free memory was 141.3 MB in the beginning and 136.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-12-23 01:18:31,395 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 379.34 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 117.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 75.66 ms. Allocated memory is still 153.1 MB. Free memory was 117.4 MB in the beginning and 115.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.28 ms. Allocated memory is still 153.1 MB. Free memory was 115.8 MB in the beginning and 114.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 523.91 ms. Allocated memory is still 153.1 MB. Free memory was 114.6 MB in the beginning and 97.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5985.89 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 135.6 MB in the beginning and 141.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 24.7 MB. Max. memory is 8.0 GB. * Witness Printer took 146.39 ms. Allocated memory is still 184.5 MB. Free memory was 141.3 MB in the beginning and 136.1 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