/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:10:30,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:10:30,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:10:30,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:10:30,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:10:30,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:10:30,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:10:30,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:10:30,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:10:30,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:10:30,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:10:30,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:10:30,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:10:30,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:10:30,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:10:30,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:10:30,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:10:30,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:10:30,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:10:30,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:10:30,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:10:30,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:10:30,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:10:30,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:10:30,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:10:30,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:10:30,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:10:30,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:10:30,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:10:30,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:10:30,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:10:30,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:10:30,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:10:30,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:10:30,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:10:30,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:10:30,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 17:10:30,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:10:30,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:10:30,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:10:30,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:10:30,535 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:10:30,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:10:30,536 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:10:30,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:10:30,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:10:30,537 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:10:30,537 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:10:30,537 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:10:30,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:10:30,538 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:10:30,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:10:30,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:10:30,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:10:30,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:10:30,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:10:30,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:10:30,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:10:30,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:10:30,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:10:30,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:10:30,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:10:30,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:10:30,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:10:30,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:10:30,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:10:30,985 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:10:30,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-12-23 17:10:31,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9d3081f3c/da0ebdfeef954ad1ae53d712fbdcd0ad/FLAGd9ff637aa [2020-12-23 17:10:31,823 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:10:31,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2020-12-23 17:10:31,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9d3081f3c/da0ebdfeef954ad1ae53d712fbdcd0ad/FLAGd9ff637aa [2020-12-23 17:10:32,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9d3081f3c/da0ebdfeef954ad1ae53d712fbdcd0ad [2020-12-23 17:10:32,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:10:32,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:10:32,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:10:32,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:10:32,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:10:32,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cdca00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32, skipping insertion in model container [2020-12-23 17:10:32,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:10:32,222 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 17:10:32,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:10:32,418 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2020-12-23 17:10:32,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:10:32,455 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:10:32,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32 WrapperNode [2020-12-23 17:10:32,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:10:32,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:10:32,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:10:32,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:10:32,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:10:32,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:10:32,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:10:32,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:10:32,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... [2020-12-23 17:10:32,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:10:32,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:10:32,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:10:32,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:10:32,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:10:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:10:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:10:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:10:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 17:10:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:10:32,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:10:33,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:10:33,032 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 17:10:33,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:10:33 BoogieIcfgContainer [2020-12-23 17:10:33,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:10:33,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:10:33,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:10:33,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:10:33,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:10:32" (1/3) ... [2020-12-23 17:10:33,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66150fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:10:33, skipping insertion in model container [2020-12-23 17:10:33,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:10:32" (2/3) ... [2020-12-23 17:10:33,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66150fc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:10:33, skipping insertion in model container [2020-12-23 17:10:33,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:10:33" (3/3) ... [2020-12-23 17:10:33,058 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2020-12-23 17:10:33,066 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:10:33,071 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-23 17:10:33,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-23 17:10:33,121 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:10:33,122 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:10:33,122 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:10:33,122 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:10:33,122 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:10:33,122 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:10:33,122 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:10:33,122 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:10:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-23 17:10:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 17:10:33,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:33,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 17:10:33,149 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:33,156 INFO L82 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2020-12-23 17:10:33,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:33,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704665084] [2020-12-23 17:10:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:33,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704665084] [2020-12-23 17:10:33,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:33,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:10:33,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060218251] [2020-12-23 17:10:33,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:33,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:33,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:33,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:33,386 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-12-23 17:10:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:33,459 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-12-23 17:10:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:33,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-23 17:10:33,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:33,472 INFO L225 Difference]: With dead ends: 59 [2020-12-23 17:10:33,472 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 17:10:33,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 17:10:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2020-12-23 17:10:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 17:10:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-23 17:10:33,536 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2020-12-23 17:10:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:33,536 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-23 17:10:33,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:33,537 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-23 17:10:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:10:33,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:33,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:10:33,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:10:33,540 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2020-12-23 17:10:33,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:33,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743013104] [2020-12-23 17:10:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:33,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743013104] [2020-12-23 17:10:33,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:33,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:10:33,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852161493] [2020-12-23 17:10:33,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:33,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:33,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:33,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:33,616 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 3 states. [2020-12-23 17:10:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:33,663 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-12-23 17:10:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:33,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 17:10:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:33,665 INFO L225 Difference]: With dead ends: 58 [2020-12-23 17:10:33,665 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 17:10:33,666 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 [2020-12-23 17:10:33,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 17:10:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2020-12-23 17:10:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 17:10:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 17:10:33,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2020-12-23 17:10:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:33,672 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 17:10:33,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 17:10:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:10:33,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:33,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:10:33,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:10:33,674 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2020-12-23 17:10:33,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:33,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946033586] [2020-12-23 17:10:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:33,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946033586] [2020-12-23 17:10:33,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:33,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:10:33,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360064797] [2020-12-23 17:10:33,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:33,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:33,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:33,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:33,729 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 4 states. [2020-12-23 17:10:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:33,795 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-23 17:10:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:33,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 17:10:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:33,797 INFO L225 Difference]: With dead ends: 32 [2020-12-23 17:10:33,797 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 17:10:33,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:10:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 17:10:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 17:10:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 17:10:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 17:10:33,808 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2020-12-23 17:10:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:33,811 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 17:10:33,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 17:10:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:10:33,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:33,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:10:33,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:10:33,814 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:33,815 INFO L82 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2020-12-23 17:10:33,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:33,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090987291] [2020-12-23 17:10:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:33,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090987291] [2020-12-23 17:10:33,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:33,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:10:33,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385227140] [2020-12-23 17:10:33,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:33,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:33,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:33,884 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 4 states. [2020-12-23 17:10:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:33,972 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-12-23 17:10:33,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:10:33,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 17:10:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:33,974 INFO L225 Difference]: With dead ends: 55 [2020-12-23 17:10:33,974 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 17:10:33,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:10:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 17:10:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2020-12-23 17:10:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 17:10:33,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 17:10:33,980 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2020-12-23 17:10:33,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:33,981 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 17:10:33,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:33,981 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 17:10:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:10:33,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:33,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:33,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 17:10:33,983 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:33,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2020-12-23 17:10:33,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:33,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171391530] [2020-12-23 17:10:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:34,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171391530] [2020-12-23 17:10:34,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:34,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:10:34,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974513163] [2020-12-23 17:10:34,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:34,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:34,028 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2020-12-23 17:10:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:34,050 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-23 17:10:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:34,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 17:10:34,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:34,052 INFO L225 Difference]: With dead ends: 35 [2020-12-23 17:10:34,052 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 17:10:34,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:10:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 17:10:34,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-12-23 17:10:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 17:10:34,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-23 17:10:34,057 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2020-12-23 17:10:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:34,057 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-23 17:10:34,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:34,058 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-23 17:10:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 17:10:34,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:34,058 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:34,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 17:10:34,059 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:34,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2020-12-23 17:10:34,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:34,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288151297] [2020-12-23 17:10:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:34,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288151297] [2020-12-23 17:10:34,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206479656] [2020-12-23 17:10:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:34,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 17:10:34,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:34,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:34,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-23 17:10:34,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282525707] [2020-12-23 17:10:34,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:34,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:34,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:34,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:34,252 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 4 states. [2020-12-23 17:10:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:34,306 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-12-23 17:10:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:34,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 17:10:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:34,309 INFO L225 Difference]: With dead ends: 61 [2020-12-23 17:10:34,309 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 17:10:34,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:10:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 17:10:34,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2020-12-23 17:10:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 17:10:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-23 17:10:34,329 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-12-23 17:10:34,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:34,331 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-23 17:10:34,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-23 17:10:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 17:10:34,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:34,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:34,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 17:10:34,550 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:34,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2020-12-23 17:10:34,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:34,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955898537] [2020-12-23 17:10:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 17:10:34,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955898537] [2020-12-23 17:10:34,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:10:34,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 17:10:34,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806578837] [2020-12-23 17:10:34,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 17:10:34,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:34,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 17:10:34,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:10:34,679 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 5 states. [2020-12-23 17:10:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:34,743 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 17:10:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:10:34,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 17:10:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:34,744 INFO L225 Difference]: With dead ends: 36 [2020-12-23 17:10:34,744 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 17:10:34,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 17:10:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 17:10:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 17:10:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-12-23 17:10:34,748 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 11 [2020-12-23 17:10:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:34,749 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-12-23 17:10:34,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 17:10:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-12-23 17:10:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 17:10:34,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:34,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:34,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 17:10:34,750 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:34,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2020-12-23 17:10:34,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:34,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906002520] [2020-12-23 17:10:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906002520] [2020-12-23 17:10:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771174931] [2020-12-23 17:10:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:34,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 17:10:34,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:34,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:34,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-23 17:10:34,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722268529] [2020-12-23 17:10:34,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:10:34,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:34,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:10:34,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:10:34,903 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2020-12-23 17:10:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:34,932 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-12-23 17:10:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:34,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 17:10:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:34,934 INFO L225 Difference]: With dead ends: 39 [2020-12-23 17:10:34,934 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 17:10:34,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:10:34,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 17:10:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-23 17:10:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 17:10:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-23 17:10:34,938 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 12 [2020-12-23 17:10:34,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:34,938 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-23 17:10:34,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:10:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-23 17:10:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 17:10:34,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:34,939 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-23 17:10:35,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:35,153 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2073745800, now seen corresponding path program 2 times [2020-12-23 17:10:35,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:35,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379595189] [2020-12-23 17:10:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:35,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379595189] [2020-12-23 17:10:35,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534018630] [2020-12-23 17:10:35,257 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 [2020-12-23 17:10:35,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:10:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:35,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:35,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:35,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:35,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2020-12-23 17:10:35,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176672546] [2020-12-23 17:10:35,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 17:10:35,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:35,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 17:10:35,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 17:10:35,416 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2020-12-23 17:10:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:35,537 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-12-23 17:10:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:10:35,538 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 17:10:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:35,540 INFO L225 Difference]: With dead ends: 84 [2020-12-23 17:10:35,540 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 17:10:35,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:10:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 17:10:35,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 34. [2020-12-23 17:10:35,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 17:10:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-12-23 17:10:35,545 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 15 [2020-12-23 17:10:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:35,545 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-12-23 17:10:35,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 17:10:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-12-23 17:10:35,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:10:35,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:35,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:35,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:35,761 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2020-12-23 17:10:35,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:35,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525329662] [2020-12-23 17:10:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:35,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525329662] [2020-12-23 17:10:35,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309677805] [2020-12-23 17:10:35,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:35,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:10:35,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:35,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 17:10:35,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:35,960 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-23 17:10:35,960 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:35,962 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:35,967 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:35,969 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:10:35,969 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-12-23 17:10:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 17:10:36,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:36,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2020-12-23 17:10:36,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79250984] [2020-12-23 17:10:36,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:36,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:10:36,008 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 3 states. [2020-12-23 17:10:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:36,025 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-23 17:10:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:36,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 17:10:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:36,026 INFO L225 Difference]: With dead ends: 32 [2020-12-23 17:10:36,026 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 17:10:36,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:10:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 17:10:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-23 17:10:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 17:10:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-23 17:10:36,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2020-12-23 17:10:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:36,030 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-23 17:10:36,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-23 17:10:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 17:10:36,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:36,031 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:36,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:36,246 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:36,247 INFO L82 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2020-12-23 17:10:36,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:36,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750370696] [2020-12-23 17:10:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:36,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750370696] [2020-12-23 17:10:36,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868651247] [2020-12-23 17:10:36,304 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:36,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 17:10:36,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:36,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:36,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 17:10:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087740911] [2020-12-23 17:10:36,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:10:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:10:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:36,439 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-12-23 17:10:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:36,478 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-12-23 17:10:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:10:36,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 17:10:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:36,479 INFO L225 Difference]: With dead ends: 41 [2020-12-23 17:10:36,479 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 17:10:36,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 17:10:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-12-23 17:10:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 17:10:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-23 17:10:36,483 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2020-12-23 17:10:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:36,483 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-23 17:10:36,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:10:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-23 17:10:36,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 17:10:36,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:36,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:36,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 17:10:36,698 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash 452809535, now seen corresponding path program 2 times [2020-12-23 17:10:36,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:36,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754529604] [2020-12-23 17:10:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:36,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754529604] [2020-12-23 17:10:36,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229469266] [2020-12-23 17:10:36,772 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 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 [2020-12-23 17:10:36,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:10:36,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:36,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:36,847 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_10|], 1=[|v_#valid_21|]} [2020-12-23 17:10:36,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:36,853 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:36,854 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:36,865 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:36,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:36,873 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 17:10:36,875 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:36,887 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:36,888 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:10:36,889 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-23 17:10:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 17:10:37,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:37,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2020-12-23 17:10:37,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980064339] [2020-12-23 17:10:37,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:10:37,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:37,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:10:37,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:37,006 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2020-12-23 17:10:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:37,054 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-12-23 17:10:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:10:37,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-23 17:10:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:37,056 INFO L225 Difference]: With dead ends: 58 [2020-12-23 17:10:37,056 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 17:10:37,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 17:10:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-12-23 17:10:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 17:10:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-23 17:10:37,059 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 22 [2020-12-23 17:10:37,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:37,060 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-23 17:10:37,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:10:37,060 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-23 17:10:37,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 17:10:37,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:37,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:37,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:37,276 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:37,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1462146076, now seen corresponding path program 1 times [2020-12-23 17:10:37,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:37,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721166691] [2020-12-23 17:10:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 17:10:37,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721166691] [2020-12-23 17:10:37,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685569372] [2020-12-23 17:10:37,315 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:37,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:37,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:10:37,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:37,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2020-12-23 17:10:37,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685700802] [2020-12-23 17:10:37,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:10:37,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:37,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:10:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:10:37,469 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 8 states. [2020-12-23 17:10:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:37,687 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-12-23 17:10:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 17:10:37,688 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-23 17:10:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:37,689 INFO L225 Difference]: With dead ends: 123 [2020-12-23 17:10:37,689 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 17:10:37,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2020-12-23 17:10:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 17:10:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-12-23 17:10:37,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 17:10:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-12-23 17:10:37,694 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 28 [2020-12-23 17:10:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:37,694 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-12-23 17:10:37,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:10:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-12-23 17:10:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 17:10:37,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:37,696 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:37,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:37,910 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:37,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:37,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2053576093, now seen corresponding path program 1 times [2020-12-23 17:10:37,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:37,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659769306] [2020-12-23 17:10:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 90 proven. 34 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 17:10:38,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659769306] [2020-12-23 17:10:38,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997432421] [2020-12-23 17:10:38,028 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:38,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:10:38,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 90 proven. 34 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 17:10:38,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:38,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 17:10:38,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854111660] [2020-12-23 17:10:38,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 17:10:38,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:38,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 17:10:38,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:10:38,242 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 12 states. [2020-12-23 17:10:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:38,322 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-12-23 17:10:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:10:38,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-12-23 17:10:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:38,323 INFO L225 Difference]: With dead ends: 91 [2020-12-23 17:10:38,324 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 17:10:38,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-23 17:10:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 17:10:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-12-23 17:10:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 17:10:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-12-23 17:10:38,338 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 54 [2020-12-23 17:10:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:38,338 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-12-23 17:10:38,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 17:10:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-12-23 17:10:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 17:10:38,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:38,343 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:38,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 17:10:38,557 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1430852155, now seen corresponding path program 2 times [2020-12-23 17:10:38,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:38,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587727736] [2020-12-23 17:10:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 137 proven. 55 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-23 17:10:38,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587727736] [2020-12-23 17:10:38,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547958863] [2020-12-23 17:10:38,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:38,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:10:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:10:38,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 137 proven. 55 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-23 17:10:38,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:38,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 17:10:38,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89012041] [2020-12-23 17:10:38,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 17:10:38,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:38,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 17:10:38,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:10:38,942 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 14 states. [2020-12-23 17:10:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:39,012 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2020-12-23 17:10:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 17:10:39,013 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-12-23 17:10:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:39,013 INFO L225 Difference]: With dead ends: 101 [2020-12-23 17:10:39,014 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 17:10:39,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-23 17:10:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 17:10:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-12-23 17:10:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 17:10:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-12-23 17:10:39,017 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 64 [2020-12-23 17:10:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:39,017 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-12-23 17:10:39,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 17:10:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-12-23 17:10:39,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 17:10:39,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:39,019 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:39,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 17:10:39,233 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1919974563, now seen corresponding path program 3 times [2020-12-23 17:10:39,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:39,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17830499] [2020-12-23 17:10:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 194 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-23 17:10:39,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17830499] [2020-12-23 17:10:39,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472023876] [2020-12-23 17:10:39,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:39,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 17:10:39,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:39,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:10:39,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:39,478 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_11|], 1=[|v_#valid_22|]} [2020-12-23 17:10:39,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:39,485 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:39,486 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:39,496 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:39,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:39,508 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 17:10:39,512 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:39,519 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:39,525 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:10:39,525 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-23 17:10:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 17:10:39,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:39,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3] total 11 [2020-12-23 17:10:39,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896455409] [2020-12-23 17:10:39,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 17:10:39,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:39,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 17:10:39,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 17:10:39,822 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand 11 states. [2020-12-23 17:10:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:40,428 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2020-12-23 17:10:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 17:10:40,429 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-12-23 17:10:40,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:40,430 INFO L225 Difference]: With dead ends: 156 [2020-12-23 17:10:40,430 INFO L226 Difference]: Without dead ends: 156 [2020-12-23 17:10:40,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-12-23 17:10:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-23 17:10:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2020-12-23 17:10:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 17:10:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2020-12-23 17:10:40,435 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 74 [2020-12-23 17:10:40,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:40,435 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2020-12-23 17:10:40,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 17:10:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2020-12-23 17:10:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 17:10:40,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:40,437 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:40,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 17:10:40,653 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:40,654 INFO L82 PathProgramCache]: Analyzing trace with hash -703043040, now seen corresponding path program 2 times [2020-12-23 17:10:40,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:40,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371660258] [2020-12-23 17:10:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 17:10:40,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371660258] [2020-12-23 17:10:40,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485376202] [2020-12-23 17:10:40,789 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:40,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:10:40,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:40,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:40,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:40,842 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_23|]} [2020-12-23 17:10:40,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:40,847 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:40,849 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:40,856 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:40,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:40,861 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 17:10:40,862 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:40,868 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:40,869 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:10:40,870 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 17:10:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2020-12-23 17:10:41,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:41,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-23 17:10:41,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058210746] [2020-12-23 17:10:41,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:41,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:41,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:41,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:41,181 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 4 states. [2020-12-23 17:10:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:41,223 INFO L93 Difference]: Finished difference Result 143 states and 149 transitions. [2020-12-23 17:10:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:41,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-12-23 17:10:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:41,224 INFO L225 Difference]: With dead ends: 143 [2020-12-23 17:10:41,225 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 17:10:41,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 17:10:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 17:10:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-12-23 17:10:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 17:10:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2020-12-23 17:10:41,229 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 90 [2020-12-23 17:10:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:41,229 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2020-12-23 17:10:41,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2020-12-23 17:10:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 17:10:41,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:41,231 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:41,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 17:10:41,447 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2094673244, now seen corresponding path program 1 times [2020-12-23 17:10:41,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:41,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792582010] [2020-12-23 17:10:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 262 proven. 112 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-12-23 17:10:41,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792582010] [2020-12-23 17:10:41,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184248804] [2020-12-23 17:10:41,662 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:41,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 17:10:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 262 proven. 112 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-12-23 17:10:42,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:42,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-23 17:10:42,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21080907] [2020-12-23 17:10:42,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 17:10:42,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:42,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 17:10:42,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-23 17:10:42,013 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand 18 states. [2020-12-23 17:10:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:42,100 INFO L93 Difference]: Finished difference Result 169 states and 175 transitions. [2020-12-23 17:10:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 17:10:42,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2020-12-23 17:10:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:42,102 INFO L225 Difference]: With dead ends: 169 [2020-12-23 17:10:42,102 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 17:10:42,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-23 17:10:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 17:10:42,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-12-23 17:10:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 17:10:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 163 transitions. [2020-12-23 17:10:42,107 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 163 transitions. Word has length 93 [2020-12-23 17:10:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:42,107 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 163 transitions. [2020-12-23 17:10:42,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 17:10:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 163 transitions. [2020-12-23 17:10:42,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 17:10:42,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:42,108 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:42,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 17:10:42,322 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:42,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1716143932, now seen corresponding path program 2 times [2020-12-23 17:10:42,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:42,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461390702] [2020-12-23 17:10:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 339 proven. 148 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-23 17:10:42,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461390702] [2020-12-23 17:10:42,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979686929] [2020-12-23 17:10:42,480 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:42,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:10:42,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:42,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:10:42,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2020-12-23 17:10:42,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:42,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2020-12-23 17:10:42,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771018878] [2020-12-23 17:10:42,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:10:42,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:42,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:10:42,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:10:42,804 INFO L87 Difference]: Start difference. First operand 157 states and 163 transitions. Second operand 4 states. [2020-12-23 17:10:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:42,838 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2020-12-23 17:10:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:10:42,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-12-23 17:10:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:42,841 INFO L225 Difference]: With dead ends: 156 [2020-12-23 17:10:42,841 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 17:10:42,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-23 17:10:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 17:10:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2020-12-23 17:10:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 17:10:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2020-12-23 17:10:42,845 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 103 [2020-12-23 17:10:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:42,845 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2020-12-23 17:10:42,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:10:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2020-12-23 17:10:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 17:10:42,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:42,847 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:43,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:43,062 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:43,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:43,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1660976843, now seen corresponding path program 1 times [2020-12-23 17:10:43,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:43,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345895720] [2020-12-23 17:10:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 339 proven. 148 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-23 17:10:43,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345895720] [2020-12-23 17:10:43,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962714594] [2020-12-23 17:10:43,216 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:43,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 17:10:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 339 proven. 148 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-12-23 17:10:43,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:43,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 17:10:43,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554188227] [2020-12-23 17:10:43,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 17:10:43,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:43,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 17:10:43,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-23 17:10:43,638 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 20 states. [2020-12-23 17:10:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:43,749 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2020-12-23 17:10:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 17:10:43,749 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-12-23 17:10:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:43,751 INFO L225 Difference]: With dead ends: 177 [2020-12-23 17:10:43,751 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 17:10:43,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-23 17:10:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 17:10:43,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2020-12-23 17:10:43,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 17:10:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2020-12-23 17:10:43,755 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 104 [2020-12-23 17:10:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:43,755 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2020-12-23 17:10:43,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 17:10:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2020-12-23 17:10:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 17:10:43,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:43,757 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:43,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:43,970 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:43,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1846195037, now seen corresponding path program 2 times [2020-12-23 17:10:43,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:43,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085616192] [2020-12-23 17:10:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 426 proven. 189 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-23 17:10:44,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085616192] [2020-12-23 17:10:44,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724802382] [2020-12-23 17:10:44,152 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:44,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 17:10:44,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:44,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 17:10:44,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 426 proven. 189 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-12-23 17:10:44,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:44,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-23 17:10:44,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867077607] [2020-12-23 17:10:44,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 17:10:44,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 17:10:44,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-23 17:10:44,590 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 22 states. [2020-12-23 17:10:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:44,692 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2020-12-23 17:10:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 17:10:44,693 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 114 [2020-12-23 17:10:44,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:44,694 INFO L225 Difference]: With dead ends: 192 [2020-12-23 17:10:44,694 INFO L226 Difference]: Without dead ends: 192 [2020-12-23 17:10:44,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-23 17:10:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-23 17:10:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2020-12-23 17:10:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 17:10:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2020-12-23 17:10:44,699 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 114 [2020-12-23 17:10:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:44,700 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2020-12-23 17:10:44,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 17:10:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2020-12-23 17:10:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 17:10:44,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:44,704 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:10:44,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 17:10:44,919 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1224310517, now seen corresponding path program 3 times [2020-12-23 17:10:44,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:44,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010663976] [2020-12-23 17:10:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 523 proven. 235 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-23 17:10:45,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010663976] [2020-12-23 17:10:45,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239707634] [2020-12-23 17:10:45,107 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:45,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 17:10:45,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:45,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 17:10:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2020-12-23 17:10:45,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:45,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 19 [2020-12-23 17:10:45,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996740957] [2020-12-23 17:10:45,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 17:10:45,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:45,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 17:10:45,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-12-23 17:10:45,435 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 19 states. [2020-12-23 17:10:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:46,940 INFO L93 Difference]: Finished difference Result 218 states and 223 transitions. [2020-12-23 17:10:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 17:10:46,944 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 124 [2020-12-23 17:10:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:46,946 INFO L225 Difference]: With dead ends: 218 [2020-12-23 17:10:46,946 INFO L226 Difference]: Without dead ends: 218 [2020-12-23 17:10:46,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=899, Invalid=1963, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 17:10:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-23 17:10:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 199. [2020-12-23 17:10:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 17:10:46,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2020-12-23 17:10:46,952 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 124 [2020-12-23 17:10:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:46,952 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2020-12-23 17:10:46,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 17:10:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2020-12-23 17:10:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 17:10:46,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:46,954 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-23 17:10:47,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:47,170 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:47,171 INFO L82 PathProgramCache]: Analyzing trace with hash 496940454, now seen corresponding path program 4 times [2020-12-23 17:10:47,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:47,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635722438] [2020-12-23 17:10:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 630 proven. 286 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-23 17:10:47,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635722438] [2020-12-23 17:10:47,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741172896] [2020-12-23 17:10:47,424 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:47,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:10:47,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 17:10:47,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2020-12-23 17:10:47,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:47,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-23 17:10:47,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904414841] [2020-12-23 17:10:47,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 17:10:47,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 17:10:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-12-23 17:10:47,905 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand 17 states. [2020-12-23 17:10:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:48,965 INFO L93 Difference]: Finished difference Result 307 states and 312 transitions. [2020-12-23 17:10:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 17:10:48,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 138 [2020-12-23 17:10:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:48,967 INFO L225 Difference]: With dead ends: 307 [2020-12-23 17:10:48,967 INFO L226 Difference]: Without dead ends: 307 [2020-12-23 17:10:48,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=1846, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 17:10:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-23 17:10:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 217. [2020-12-23 17:10:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 17:10:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2020-12-23 17:10:48,974 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 138 [2020-12-23 17:10:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:48,974 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2020-12-23 17:10:48,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 17:10:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2020-12-23 17:10:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-23 17:10:48,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:48,977 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1] [2020-12-23 17:10:49,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 17:10:49,192 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:49,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1540658664, now seen corresponding path program 4 times [2020-12-23 17:10:49,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:49,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618223633] [2020-12-23 17:10:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 1492 proven. 342 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2020-12-23 17:10:49,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618223633] [2020-12-23 17:10:49,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611738636] [2020-12-23 17:10:49,471 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:49,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 17:10:49,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 17:10:49,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3275 backedges. 1492 proven. 342 refuted. 0 times theorem prover too weak. 1441 trivial. 0 not checked. [2020-12-23 17:10:50,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:50,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-23 17:10:50,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068551878] [2020-12-23 17:10:50,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 17:10:50,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:50,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 17:10:50,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2020-12-23 17:10:50,287 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand 28 states. [2020-12-23 17:10:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:50,419 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2020-12-23 17:10:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 17:10:50,419 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 201 [2020-12-23 17:10:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:50,421 INFO L225 Difference]: With dead ends: 244 [2020-12-23 17:10:50,421 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 17:10:50,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2020-12-23 17:10:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 17:10:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 232. [2020-12-23 17:10:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-23 17:10:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 236 transitions. [2020-12-23 17:10:50,439 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 236 transitions. Word has length 201 [2020-12-23 17:10:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:50,440 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 236 transitions. [2020-12-23 17:10:50,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 17:10:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 236 transitions. [2020-12-23 17:10:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-23 17:10:50,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:50,443 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1] [2020-12-23 17:10:50,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 17:10:50,658 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1369292055, now seen corresponding path program 5 times [2020-12-23 17:10:50,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:50,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411937562] [2020-12-23 17:10:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3839 backedges. 1746 proven. 403 refuted. 0 times theorem prover too weak. 1690 trivial. 0 not checked. [2020-12-23 17:10:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411937562] [2020-12-23 17:10:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834363191] [2020-12-23 17:10:50,983 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:51,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2020-12-23 17:10:51,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:51,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 17:10:51,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3839 backedges. 1746 proven. 403 refuted. 0 times theorem prover too weak. 1690 trivial. 0 not checked. [2020-12-23 17:10:51,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:10:51,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 17:10:51,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484842035] [2020-12-23 17:10:51,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 17:10:51,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:51,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 17:10:51,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-23 17:10:51,922 INFO L87 Difference]: Start difference. First operand 232 states and 236 transitions. Second operand 30 states. [2020-12-23 17:10:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:52,091 INFO L93 Difference]: Finished difference Result 259 states and 263 transitions. [2020-12-23 17:10:52,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 17:10:52,095 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 216 [2020-12-23 17:10:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:52,096 INFO L225 Difference]: With dead ends: 259 [2020-12-23 17:10:52,096 INFO L226 Difference]: Without dead ends: 259 [2020-12-23 17:10:52,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-23 17:10:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-23 17:10:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 247. [2020-12-23 17:10:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-23 17:10:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 251 transitions. [2020-12-23 17:10:52,102 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 251 transitions. Word has length 216 [2020-12-23 17:10:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:52,103 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 251 transitions. [2020-12-23 17:10:52,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 17:10:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 251 transitions. [2020-12-23 17:10:52,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-12-23 17:10:52,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:10:52,106 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1] [2020-12-23 17:10:52,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 17:10:52,320 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 17:10:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:10:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -685055944, now seen corresponding path program 6 times [2020-12-23 17:10:52,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:10:52,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783277449] [2020-12-23 17:10:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:10:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:10:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 2020 proven. 469 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2020-12-23 17:10:52,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783277449] [2020-12-23 17:10:52,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856958792] [2020-12-23 17:10:52,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:10:52,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 17:10:52,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:10:52,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 17:10:52,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:10:52,759 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_26|]} [2020-12-23 17:10:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:52,764 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 17:10:52,765 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:52,775 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:52,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 17:10:52,780 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-23 17:10:52,783 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 17:10:52,789 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 17:10:52,790 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 17:10:52,791 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 17:10:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 2028 proven. 0 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-12-23 17:10:53,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:10:53,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 21 [2020-12-23 17:10:53,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093018520] [2020-12-23 17:10:53,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:10:53,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:10:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:10:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-12-23 17:10:53,912 INFO L87 Difference]: Start difference. First operand 247 states and 251 transitions. Second operand 6 states. [2020-12-23 17:10:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:10:53,971 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2020-12-23 17:10:53,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 17:10:53,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 231 [2020-12-23 17:10:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:10:53,972 INFO L225 Difference]: With dead ends: 245 [2020-12-23 17:10:53,972 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 17:10:53,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-12-23 17:10:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 17:10:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 17:10:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 17:10:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 17:10:53,973 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 231 [2020-12-23 17:10:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:10:53,973 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 17:10:53,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:10:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 17:10:53,973 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 17:10:54,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 17:10:54,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:10:54 BoogieIcfgContainer [2020-12-23 17:10:54,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:10:54,190 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:10:54,190 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:10:54,190 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:10:54,191 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:10:33" (3/4) ... [2020-12-23 17:10:54,195 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 17:10:54,210 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-23 17:10:54,211 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 17:10:54,211 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-23 17:10:54,271 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-memsafety/ArraysOfVariableLength4.c-witness.graphml [2020-12-23 17:10:54,271 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:10:54,273 INFO L168 Benchmark]: Toolchain (without parser) took 22093.92 ms. Allocated memory was 151.0 MB in the beginning and 381.7 MB in the end (delta: 230.7 MB). Free memory was 126.6 MB in the beginning and 307.6 MB in the end (delta: -181.0 MB). Peak memory consumption was 50.3 MB. Max. memory is 8.0 GB. [2020-12-23 17:10:54,273 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:10:54,273 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:10:54,274 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.07 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:10:54,274 INFO L168 Benchmark]: Boogie Preprocessor took 30.76 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:10:54,275 INFO L168 Benchmark]: RCFGBuilder took 506.14 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 131.8 MB in the end (delta: -17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-23 17:10:54,275 INFO L168 Benchmark]: TraceAbstraction took 21145.01 ms. Allocated memory was 151.0 MB in the beginning and 381.7 MB in the end (delta: 230.7 MB). Free memory was 131.4 MB in the beginning and 310.5 MB in the end (delta: -179.1 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:10:54,276 INFO L168 Benchmark]: Witness Printer took 82.00 ms. Allocated memory is still 381.7 MB. Free memory was 310.5 MB in the beginning and 307.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:10:54,278 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 271.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.07 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.76 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 506.14 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 131.8 MB in the end (delta: -17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21145.01 ms. Allocated memory was 151.0 MB in the beginning and 381.7 MB in the end (delta: 230.7 MB). Free memory was 131.4 MB in the beginning and 310.5 MB in the end (delta: -179.1 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB. * Witness Printer took 82.00 ms. Allocated memory is still 381.7 MB. Free memory was 310.5 MB in the beginning and 307.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.0s, OverallIterations: 26, TraceHistogramMax: 42, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 534 SDtfs, 2229 SDslu, 1522 SDs, 0 SdLazy, 1744 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2006 GetRequests, 1653 SyntacticMatches, 2 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=247occurred in iteration=25, 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, 26 MinimizatonAttempts, 409 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 3495 NumberOfCodeBlocks, 2916 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 3449 ConstructedInterpolants, 410 QuantifiedInterpolants, 2706696 SizeOfPredicates, 38 NumberOfNonLiveVariables, 3473 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 46 InterpolantComputations, 11 PerfectInterpolantSequences, 30425/35387 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 correct! Received shutdown request...