/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:42:35,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:42:35,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:42:35,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:42:35,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:42:35,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:42:35,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:42:35,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:42:35,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:42:35,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:42:35,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:42:35,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:42:35,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:42:35,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:42:35,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:42:35,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:42:35,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:42:35,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:42:35,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:42:35,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:42:35,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:42:35,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:42:35,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:42:35,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:42:35,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:42:35,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:42:35,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:42:35,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:42:35,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:42:35,483 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:42:35,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:42:35,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:42:35,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:42:35,486 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:42:35,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:42:35,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:42:35,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:42:35,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:42:35,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:42:35,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:42:35,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:42:35,487 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:42:35,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:42:35,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:42:35,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:42:35,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:42:35,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:35,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:42:35,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:42:35,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:42:35,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:42:35,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:42:35,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:42:35,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:42:35,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:42:35,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:42:35,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:42:35,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:42:35,896 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:42:35,897 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:42:35,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2021-01-06 09:42:35,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b09751e7f/dda37e548ccc46d3b5bb34aecbbd00be/FLAG72b8a6820 [2021-01-06 09:42:36,627 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:42:36,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2021-01-06 09:42:36,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b09751e7f/dda37e548ccc46d3b5bb34aecbbd00be/FLAG72b8a6820 [2021-01-06 09:42:37,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b09751e7f/dda37e548ccc46d3b5bb34aecbbd00be [2021-01-06 09:42:37,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:42:37,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:42:37,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:37,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:42:37,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:42:37,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7563e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37, skipping insertion in model container [2021-01-06 09:42:37,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:42:37,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:42:37,289 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a6~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a5~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a7~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a7~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:37,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:37,326 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:42:37,341 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a6~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a6~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a5~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a5~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a7~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a7~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a7~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a7~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:37,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:37,383 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:42:37,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37 WrapperNode [2021-01-06 09:42:37,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:37,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:37,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:42:37,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:42:37,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,403 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:37,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:42:37,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:42:37,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:42:37,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... [2021-01-06 09:42:37,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:42:37,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:42:37,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:42:37,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:42:37,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:42:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:42:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:42:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:42:37,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:42:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:42:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:42:38,045 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:42:38,046 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-01-06 09:42:38,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:38 BoogieIcfgContainer [2021-01-06 09:42:38,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:42:38,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:42:38,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:42:38,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:42:38,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:42:37" (1/3) ... [2021-01-06 09:42:38,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c5bc44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:38, skipping insertion in model container [2021-01-06 09:42:38,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:37" (2/3) ... [2021-01-06 09:42:38,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c5bc44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:38, skipping insertion in model container [2021-01-06 09:42:38,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:38" (3/3) ... [2021-01-06 09:42:38,057 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2021-01-06 09:42:38,064 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:42:38,070 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:42:38,092 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:42:38,120 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:42:38,121 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:42:38,121 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:42:38,121 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:42:38,121 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:42:38,121 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:42:38,121 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:42:38,122 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:42:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-01-06 09:42:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 09:42:38,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:38,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:38,147 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash -962610817, now seen corresponding path program 1 times [2021-01-06 09:42:38,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:38,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813929525] [2021-01-06 09:42:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:38,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813929525] [2021-01-06 09:42:38,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:42:38,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:42:38,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903018470] [2021-01-06 09:42:38,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:38,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:38,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:38,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:38,403 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2021-01-06 09:42:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:38,440 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2021-01-06 09:42:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:38,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 09:42:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:38,452 INFO L225 Difference]: With dead ends: 64 [2021-01-06 09:42:38,453 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 09:42:38,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 09:42:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 09:42:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 09:42:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-01-06 09:42:38,498 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-01-06 09:42:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:38,498 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-01-06 09:42:38,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-01-06 09:42:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:42:38,500 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:38,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:38,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:42:38,501 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1385693007, now seen corresponding path program 1 times [2021-01-06 09:42:38,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:38,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459775212] [2021-01-06 09:42:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:38,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459775212] [2021-01-06 09:42:38,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744166276] [2021-01-06 09:42:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:42:38,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:42:38,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:42:38,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:42:38,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928618635] [2021-01-06 09:42:38,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:38,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:38,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:38,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:38,728 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2021-01-06 09:42:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:38,809 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2021-01-06 09:42:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:38,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-01-06 09:42:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:38,811 INFO L225 Difference]: With dead ends: 64 [2021-01-06 09:42:38,811 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 09:42:38,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 09:42:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-01-06 09:42:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:42:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-01-06 09:42:38,821 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2021-01-06 09:42:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:38,821 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-01-06 09:42:38,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-01-06 09:42:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:42:38,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:38,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:39,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:42:39,039 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:39,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1933824923, now seen corresponding path program 1 times [2021-01-06 09:42:39,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:39,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132219207] [2021-01-06 09:42:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:42:39,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132219207] [2021-01-06 09:42:39,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013120369] [2021-01-06 09:42:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:39,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:42:39,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:39,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:39,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413123275] [2021-01-06 09:42:39,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:39,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:39,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:39,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:39,281 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 5 states. [2021-01-06 09:42:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:39,310 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-01-06 09:42:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:39,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2021-01-06 09:42:39,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:39,312 INFO L225 Difference]: With dead ends: 70 [2021-01-06 09:42:39,312 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 09:42:39,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 09:42:39,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-01-06 09:42:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 09:42:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-01-06 09:42:39,320 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 33 [2021-01-06 09:42:39,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:39,321 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-01-06 09:42:39,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:39,321 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-01-06 09:42:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 09:42:39,322 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:39,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:39,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:39,538 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:39,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2053832611, now seen corresponding path program 2 times [2021-01-06 09:42:39,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:39,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971776223] [2021-01-06 09:42:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:42:39,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971776223] [2021-01-06 09:42:39,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735013061] [2021-01-06 09:42:39,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:39,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:39,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:39,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 09:42:39,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:39,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 09:42:39,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221936615] [2021-01-06 09:42:39,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:42:39,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:42:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:39,780 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2021-01-06 09:42:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:39,925 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-01-06 09:42:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:42:39,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 09:42:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:39,927 INFO L225 Difference]: With dead ends: 90 [2021-01-06 09:42:39,927 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 09:42:39,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:42:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 09:42:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-01-06 09:42:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 09:42:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-01-06 09:42:39,937 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 35 [2021-01-06 09:42:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:39,937 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-01-06 09:42:39,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:42:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-01-06 09:42:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 09:42:39,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:39,939 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:40,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:40,154 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:40,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1234669803, now seen corresponding path program 3 times [2021-01-06 09:42:40,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:40,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851143246] [2021-01-06 09:42:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-01-06 09:42:40,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851143246] [2021-01-06 09:42:40,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338706365] [2021-01-06 09:42:40,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:40,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:42:40,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:40,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:40,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-01-06 09:42:40,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:40,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-01-06 09:42:40,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318725023] [2021-01-06 09:42:40,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:42:40,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:40,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:42:40,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:42:40,447 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 9 states. [2021-01-06 09:42:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:40,598 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-01-06 09:42:40,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:42:40,599 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2021-01-06 09:42:40,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:40,600 INFO L225 Difference]: With dead ends: 116 [2021-01-06 09:42:40,600 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 09:42:40,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:42:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 09:42:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2021-01-06 09:42:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 09:42:40,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-01-06 09:42:40,610 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 49 [2021-01-06 09:42:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:40,611 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-01-06 09:42:40,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:42:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-01-06 09:42:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 09:42:40,613 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:40,613 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:40,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:40,827 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:40,827 INFO L82 PathProgramCache]: Analyzing trace with hash -283021561, now seen corresponding path program 4 times [2021-01-06 09:42:40,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:40,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648369806] [2021-01-06 09:42:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 09:42:40,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648369806] [2021-01-06 09:42:40,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034362490] [2021-01-06 09:42:40,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:41,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:42:41,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:41,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:42:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 09:42:41,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:41,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:42:41,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605507949] [2021-01-06 09:42:41,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:42:41,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:41,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:42:41,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:42:41,140 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 8 states. [2021-01-06 09:42:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:41,171 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-01-06 09:42:41,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:42:41,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2021-01-06 09:42:41,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:41,172 INFO L225 Difference]: With dead ends: 124 [2021-01-06 09:42:41,173 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 09:42:41,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:42:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 09:42:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-01-06 09:42:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 09:42:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2021-01-06 09:42:41,192 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 63 [2021-01-06 09:42:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:41,192 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2021-01-06 09:42:41,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:42:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2021-01-06 09:42:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 09:42:41,194 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:41,194 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:41,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:42:41,410 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:41,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:41,411 INFO L82 PathProgramCache]: Analyzing trace with hash 633176517, now seen corresponding path program 5 times [2021-01-06 09:42:41,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:41,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107848887] [2021-01-06 09:42:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 09:42:41,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107848887] [2021-01-06 09:42:41,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529158055] [2021-01-06 09:42:41,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true