/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/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:41:06,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:41:06,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:41:06,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:41:06,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:41:06,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:41:06,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:41:06,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:41:06,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:41:06,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:41:06,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:41:06,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:41:06,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:41:06,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:41:06,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:41:06,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:41:06,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:41:06,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:41:06,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:41:06,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:41:06,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:41:06,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:41:06,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:41:06,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:41:06,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 16:41:06,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 16:41:06,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 16:41:06,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 16:41:06,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 16:41:06,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 16:41:06,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:41:06,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:41:06,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:41:06,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:41:06,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:41:06,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:41:06,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:41:06,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:41:06,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:41:06,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:41:06,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:41:06,415 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 16:41:06,443 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:41:06,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:41:06,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:41:06,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:41:06,446 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:41:06,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:41:06,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:41:06,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:41:06,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:41:06,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:41:06,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:41:06,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:41:06,448 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:41:06,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:41:06,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:41:06,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:41:06,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:41:06,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:41:06,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:41:06,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:41:06,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:41:06,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:41:06,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:41:06,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:41:06,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:41:06,450 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:41:06,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:41:06,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:41:06,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:41:06,883 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:41:06,884 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:41:06,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-01-06 16:41:06,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/77610174c/5aa7a26f7fb44dcb8a46effca46eabd9/FLAG5bfeb4e78 [2021-01-06 16:41:07,736 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:41:07,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-01-06 16:41:07,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/77610174c/5aa7a26f7fb44dcb8a46effca46eabd9/FLAG5bfeb4e78 [2021-01-06 16:41:08,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/77610174c/5aa7a26f7fb44dcb8a46effca46eabd9 [2021-01-06 16:41:08,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:41:08,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:41:08,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:08,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:41:08,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:41:08,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41627410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08, skipping insertion in model container [2021-01-06 16:41:08,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:41:08,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:41:08,295 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/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i[840,853] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~str2~0,],[BinaryExpression[ARITHPLUS,IntegerLiteral[1],BinaryExpression[ARITHMINUS,IdentifierExpression[~j~0,],IdentifierExpression[~start~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~start~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~A~0,],[IntegerLiteral[8]]] [2021-01-06 16:41:08,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:08,354 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:41:08,369 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/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i[840,853] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#str2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#str2~0,],offset],BinaryExpression[ARITHPLUS,IntegerLiteral[1],BinaryExpression[ARITHMINUS,IdentifierExpression[~j~0,],IdentifierExpression[~start~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~start~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~#A~0,],offset]]]] [2021-01-06 16:41:08,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:08,420 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:41:08,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08 WrapperNode [2021-01-06 16:41:08,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:08,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:08,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:41:08,422 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:41:08,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:08,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:41:08,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:41:08,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:41:08,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (1/1) ... [2021-01-06 16:41:08,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:41:08,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:41:08,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:41:08,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:41:08,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (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 16:41:08,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:41:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:41:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:41:08,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:41:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-01-06 16:41:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:41:08,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:41:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:41:09,236 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:41:09,237 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 16:41:09,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:09 BoogieIcfgContainer [2021-01-06 16:41:09,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:41:09,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:41:09,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:41:09,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:41:09,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:41:08" (1/3) ... [2021-01-06 16:41:09,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b124c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:09, skipping insertion in model container [2021-01-06 16:41:09,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:08" (2/3) ... [2021-01-06 16:41:09,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b124c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:09, skipping insertion in model container [2021-01-06 16:41:09,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:09" (3/3) ... [2021-01-06 16:41:09,252 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2021-01-06 16:41:09,262 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:41:09,268 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:41:09,294 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:41:09,352 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:41:09,352 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:41:09,352 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:41:09,352 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:41:09,353 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:41:09,353 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:41:09,353 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:41:09,353 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:41:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-01-06 16:41:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:41:09,407 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:09,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:09,409 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash -649032135, now seen corresponding path program 1 times [2021-01-06 16:41:09,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:09,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966887598] [2021-01-06 16:41:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:09,630 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 16:41:09,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966887598] [2021-01-06 16:41:09,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:09,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:41:09,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236545179] [2021-01-06 16:41:09,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:41:09,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:09,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:41:09,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:41:09,668 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2021-01-06 16:41:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:09,698 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2021-01-06 16:41:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:41:09,700 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-01-06 16:41:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:09,731 INFO L225 Difference]: With dead ends: 65 [2021-01-06 16:41:09,731 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:41:09,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:41:09,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:41:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 16:41:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:41:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-01-06 16:41:09,778 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 17 [2021-01-06 16:41:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:09,779 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-01-06 16:41:09,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:41:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-01-06 16:41:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:41:09,780 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:09,780 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 16:41:09,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:41:09,781 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:09,782 INFO L82 PathProgramCache]: Analyzing trace with hash -829015504, now seen corresponding path program 1 times [2021-01-06 16:41:09,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:09,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166483298] [2021-01-06 16:41:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:09,899 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 16:41:09,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166483298] [2021-01-06 16:41:09,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:09,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:41:09,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327434712] [2021-01-06 16:41:09,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:41:09,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:41:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:41:09,906 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 3 states. [2021-01-06 16:41:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:09,936 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2021-01-06 16:41:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:41:09,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-01-06 16:41:09,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:09,937 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:41:09,938 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:41:09,939 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 16:41:09,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:41:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 16:41:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:41:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-01-06 16:41:09,945 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 21 [2021-01-06 16:41:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:09,945 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-01-06 16:41:09,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:41:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-01-06 16:41:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:41:09,946 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:09,946 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 16:41:09,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:41:09,947 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2108879182, now seen corresponding path program 1 times [2021-01-06 16:41:09,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:09,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412815396] [2021-01-06 16:41:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:10,023 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 16:41:10,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412815396] [2021-01-06 16:41:10,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:10,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:41:10,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911077888] [2021-01-06 16:41:10,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:41:10,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:10,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:41:10,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:10,027 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 5 states. [2021-01-06 16:41:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:10,146 INFO L93 Difference]: Finished difference Result 85 states and 113 transitions. [2021-01-06 16:41:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:41:10,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2021-01-06 16:41:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:10,148 INFO L225 Difference]: With dead ends: 85 [2021-01-06 16:41:10,148 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:41:10,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:41:10,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:41:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2021-01-06 16:41:10,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:41:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2021-01-06 16:41:10,157 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 21 [2021-01-06 16:41:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:10,158 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2021-01-06 16:41:10,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:41:10,158 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2021-01-06 16:41:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:41:10,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:10,159 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 16:41:10,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:41:10,160 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:10,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:10,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2049773838, now seen corresponding path program 1 times [2021-01-06 16:41:10,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:10,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122573078] [2021-01-06 16:41:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:10,319 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 16:41:10,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122573078] [2021-01-06 16:41:10,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:10,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 16:41:10,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265970027] [2021-01-06 16:41:10,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:41:10,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:10,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:41:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:10,322 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 7 states. [2021-01-06 16:41:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:10,557 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2021-01-06 16:41:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:41:10,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-01-06 16:41:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:10,561 INFO L225 Difference]: With dead ends: 140 [2021-01-06 16:41:10,561 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:41:10,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:41:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:41:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2021-01-06 16:41:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 16:41:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2021-01-06 16:41:10,575 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 21 [2021-01-06 16:41:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:10,575 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2021-01-06 16:41:10,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:41:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2021-01-06 16:41:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:41:10,576 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:10,576 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 16:41:10,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:41:10,577 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:10,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1791608400, now seen corresponding path program 1 times [2021-01-06 16:41:10,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:10,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531201333] [2021-01-06 16:41:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:10,717 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 16:41:10,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531201333] [2021-01-06 16:41:10,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:10,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 16:41:10,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822936627] [2021-01-06 16:41:10,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:41:10,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:10,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:41:10,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:10,725 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 7 states. [2021-01-06 16:41:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:10,962 INFO L93 Difference]: Finished difference Result 99 states and 130 transitions. [2021-01-06 16:41:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:41:10,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-01-06 16:41:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:10,964 INFO L225 Difference]: With dead ends: 99 [2021-01-06 16:41:10,964 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 16:41:10,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:41:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 16:41:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2021-01-06 16:41:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:41:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2021-01-06 16:41:10,977 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 21 [2021-01-06 16:41:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:10,977 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2021-01-06 16:41:10,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:41:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2021-01-06 16:41:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:41:10,979 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:10,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:10,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 16:41:10,980 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:10,980 INFO L82 PathProgramCache]: Analyzing trace with hash -784963603, now seen corresponding path program 1 times [2021-01-06 16:41:10,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:10,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421610188] [2021-01-06 16:41:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:11,045 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 16:41:11,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421610188] [2021-01-06 16:41:11,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:11,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:41:11,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448478704] [2021-01-06 16:41:11,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:41:11,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:11,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:41:11,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:41:11,048 INFO L87 Difference]: Start difference. First operand 77 states and 104 transitions. Second operand 4 states. [2021-01-06 16:41:11,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:11,083 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-01-06 16:41:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:41:11,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-01-06 16:41:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:11,085 INFO L225 Difference]: With dead ends: 128 [2021-01-06 16:41:11,085 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 16:41:11,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:11,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 16:41:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-01-06 16:41:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:41:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2021-01-06 16:41:11,097 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 23 [2021-01-06 16:41:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:11,097 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2021-01-06 16:41:11,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:41:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2021-01-06 16:41:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:41:11,099 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:11,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:11,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 16:41:11,100 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1177990613, now seen corresponding path program 1 times [2021-01-06 16:41:11,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:11,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938901793] [2021-01-06 16:41:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:11,160 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 16:41:11,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938901793] [2021-01-06 16:41:11,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:11,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 16:41:11,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427258718] [2021-01-06 16:41:11,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:41:11,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:11,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:41:11,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:41:11,164 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand 6 states. [2021-01-06 16:41:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:11,266 INFO L93 Difference]: Finished difference Result 189 states and 245 transitions. [2021-01-06 16:41:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:41:11,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2021-01-06 16:41:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:11,268 INFO L225 Difference]: With dead ends: 189 [2021-01-06 16:41:11,268 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 16:41:11,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 16:41:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2021-01-06 16:41:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:41:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2021-01-06 16:41:11,279 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 23 [2021-01-06 16:41:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:11,280 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2021-01-06 16:41:11,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:41:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2021-01-06 16:41:11,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:41:11,281 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:11,281 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, 1] [2021-01-06 16:41:11,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 16:41:11,282 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:11,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1710953077, now seen corresponding path program 1 times [2021-01-06 16:41:11,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:11,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148204730] [2021-01-06 16:41:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:11,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148204730] [2021-01-06 16:41:11,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508823198] [2021-01-06 16:41:11,346 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 16:41:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:41:11,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:11,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:11,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-01-06 16:41:11,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31372517] [2021-01-06 16:41:11,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:41:11,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:41:11,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:11,527 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 7 states. [2021-01-06 16:41:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:11,647 INFO L93 Difference]: Finished difference Result 222 states and 275 transitions. [2021-01-06 16:41:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:41:11,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2021-01-06 16:41:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:11,651 INFO L225 Difference]: With dead ends: 222 [2021-01-06 16:41:11,651 INFO L226 Difference]: Without dead ends: 159 [2021-01-06 16:41:11,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:41:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-01-06 16:41:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2021-01-06 16:41:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 16:41:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2021-01-06 16:41:11,684 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 28 [2021-01-06 16:41:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:11,685 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2021-01-06 16:41:11,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:41:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2021-01-06 16:41:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:41:11,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:11,692 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:11,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 16:41:11,906 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:11,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2012014699, now seen corresponding path program 2 times [2021-01-06 16:41:11,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:11,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160503714] [2021-01-06 16:41:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:12,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160503714] [2021-01-06 16:41:12,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028607312] [2021-01-06 16:41:12,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:12,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:12,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:12,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:41:12,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:12,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:12,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-01-06 16:41:12,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927177688] [2021-01-06 16:41:12,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:41:12,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:12,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:41:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:41:12,411 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand 17 states. [2021-01-06 16:41:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:12,998 INFO L93 Difference]: Finished difference Result 249 states and 308 transitions. [2021-01-06 16:41:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:41:12,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2021-01-06 16:41:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:13,000 INFO L225 Difference]: With dead ends: 249 [2021-01-06 16:41:13,000 INFO L226 Difference]: Without dead ends: 171 [2021-01-06 16:41:13,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:41:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-01-06 16:41:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 114. [2021-01-06 16:41:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 16:41:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 144 transitions. [2021-01-06 16:41:13,009 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 144 transitions. Word has length 33 [2021-01-06 16:41:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:13,010 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 144 transitions. [2021-01-06 16:41:13,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:41:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 144 transitions. [2021-01-06 16:41:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:41:13,011 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:13,011 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:13,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:13,227 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1000897449, now seen corresponding path program 1 times [2021-01-06 16:41:13,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:13,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369036753] [2021-01-06 16:41:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:13,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369036753] [2021-01-06 16:41:13,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806613038] [2021-01-06 16:41:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:13,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:41:13,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:13,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:41:13,744 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:41:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:13,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:13,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 16:41:13,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433237485] [2021-01-06 16:41:13,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:41:13,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:13,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:41:13,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:41:13,767 INFO L87 Difference]: Start difference. First operand 114 states and 144 transitions. Second operand 16 states. [2021-01-06 16:41:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:14,388 INFO L93 Difference]: Finished difference Result 220 states and 271 transitions. [2021-01-06 16:41:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:41:14,389 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2021-01-06 16:41:14,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:14,391 INFO L225 Difference]: With dead ends: 220 [2021-01-06 16:41:14,391 INFO L226 Difference]: Without dead ends: 218 [2021-01-06 16:41:14,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:41:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-01-06 16:41:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 133. [2021-01-06 16:41:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 16:41:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-01-06 16:41:14,402 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 33 [2021-01-06 16:41:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:14,408 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-01-06 16:41:14,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:41:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-01-06 16:41:14,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:41:14,413 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:14,413 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:14,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:41:14,624 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1002744491, now seen corresponding path program 1 times [2021-01-06 16:41:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:14,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869662662] [2021-01-06 16:41:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:41:14,648 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:41:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:41:14,668 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:41:14,717 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:41:14,718 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:41:14,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 16:41:14,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:41:14 BoogieIcfgContainer [2021-01-06 16:41:14,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:41:14,801 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:41:14,801 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:41:14,801 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:41:14,802 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:09" (3/4) ... [2021-01-06 16:41:14,804 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:41:14,875 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i-witness.graphml [2021-01-06 16:41:14,875 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:41:14,877 INFO L168 Benchmark]: Toolchain (without parser) took 6799.26 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 110.4 MB in the beginning and 131.1 MB in the end (delta: -20.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:14,878 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 155.2 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:41:14,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.03 ms. Allocated memory is still 155.2 MB. Free memory was 110.1 MB in the beginning and 98.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:14,879 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.72 ms. Allocated memory is still 155.2 MB. Free memory was 98.5 MB in the beginning and 96.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:14,880 INFO L168 Benchmark]: Boogie Preprocessor took 93.83 ms. Allocated memory is still 155.2 MB. Free memory was 96.7 MB in the beginning and 137.0 MB in the end (delta: -40.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:14,881 INFO L168 Benchmark]: RCFGBuilder took 668.28 ms. Allocated memory is still 155.2 MB. Free memory was 137.0 MB in the beginning and 117.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:14,882 INFO L168 Benchmark]: TraceAbstraction took 5557.62 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 116.4 MB in the beginning and 134.8 MB in the end (delta: -18.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:14,882 INFO L168 Benchmark]: Witness Printer took 74.51 ms. Allocated memory is still 186.6 MB. Free memory was 134.8 MB in the beginning and 131.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:41:14,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 155.2 MB. Free memory is still 127.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 342.03 ms. Allocated memory is still 155.2 MB. Free memory was 110.1 MB in the beginning and 98.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.72 ms. Allocated memory is still 155.2 MB. Free memory was 98.5 MB in the beginning and 96.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 93.83 ms. Allocated memory is still 155.2 MB. Free memory was 96.7 MB in the beginning and 137.0 MB in the end (delta: -40.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 668.28 ms. Allocated memory is still 155.2 MB. Free memory was 137.0 MB in the beginning and 117.1 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5557.62 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 116.4 MB in the beginning and 134.8 MB in the end (delta: -18.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Witness Printer took 74.51 ms. Allocated memory is still 186.6 MB. Free memory was 134.8 MB in the beginning and 131.1 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 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: [L85] char A [2 + 2 + 4 +1]; [L86] A[2 + 2 + 4] = 0 [L59] int start=0, i=-1, j=-1; [L60] char str2[2]; [L61] COND FALSE !(!str) [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L67] EXPR str[start] [L67] COND FALSE !(str[start] == '"') [L68] j = i-1 [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L70] (0 < j) && (str[j] == '"') [L70] EXPR str[j] [L70] (0 < j) && (str[j] == '"') [L70] COND FALSE !((0 < j) && (str[j] == '"')) [L71] COND TRUE start<=j [L41] return strncpy(dest,src,n); [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 463 SDtfs, 1217 SDslu, 1428 SDs, 0 SdLazy, 1263 SolverSat, 189 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 285 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 368 NumberOfCodeBlocks, 368 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 322 ConstructedInterpolants, 0 QuantifiedInterpolants, 34914 SizeOfPredicates, 9 NumberOfNonLiveVariables, 419 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 0/40 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...