/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/array-memsafety/openbsd_cmemrchr-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:00:52,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:00:52,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:00:52,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:00:52,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:00:52,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:00:52,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:00:52,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:00:52,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:00:52,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:00:52,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:00:52,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:00:52,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:00:52,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:00:52,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:00:52,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:00:52,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:00:52,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:00:52,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:00:52,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:00:52,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:00:52,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:00:52,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:00:52,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:00:52,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-07 05:00:52,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-07 05:00:52,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-07 05:00:52,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-07 05:00:52,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-07 05:00:52,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-07 05:00:52,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:00:52,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:00:52,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:00:52,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:00:52,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:00:52,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:00:52,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:00:52,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:00:52,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:00:52,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:00:52,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:00:52,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-01-07 05:00:52,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:00:52,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:00:52,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:00:52,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:00:52,466 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:00:52,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:00:52,466 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:00:52,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:00:52,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:00:52,467 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:00:52,468 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:00:52,468 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:00:52,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:00:52,468 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:00:52,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:00:52,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:00:52,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:00:52,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:00:52,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:00:52,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:00:52,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:00:52,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:00:52,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:00:52,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:00:52,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:00:52,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:00:52,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:00:52,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:00:52,943 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:00:52,944 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:00:52,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2021-01-07 05:00:53,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c22a8764d/322ffbd20a444924b12ac3b45cafdd12/FLAG4330f6bc9 [2021-01-07 05:00:53,661 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:00:53,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2021-01-07 05:00:53,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c22a8764d/322ffbd20a444924b12ac3b45cafdd12/FLAG4330f6bc9 [2021-01-07 05:00:53,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c22a8764d/322ffbd20a444924b12ac3b45cafdd12 [2021-01-07 05:00:53,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:00:53,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:00:53,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:00:53,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:00:53,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:00:53,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:00:53" (1/1) ... [2021-01-07 05:00:53,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba69905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:53, skipping insertion in model container [2021-01-07 05:00:53,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:00:53" (1/1) ... [2021-01-07 05:00:53,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:00:54,010 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~cp~0,] left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetArea~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetArea~0,],offset],IdentifierExpression[~i~0,]]]] [2021-01-07 05:00:54,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:00:54,356 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~cp~0,] left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetArea~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetArea~0,],offset],IdentifierExpression[~i~0,]]]] [2021-01-07 05:00:54,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:00:54,509 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:00:54,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54 WrapperNode [2021-01-07 05:00:54,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:00:54,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:00:54,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:00:54,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:00:54,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... [2021-01-07 05:00:54,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... [2021-01-07 05:00:54,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:00:54,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:00:54,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:00:54,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:00:54,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... [2021-01-07 05:00:54,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... [2021-01-07 05:00:54,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... [2021-01-07 05:00:54,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... [2021-01-07 05:00:54,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... [2021-01-07 05:00:54,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... [2021-01-07 05:00:54,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... [2021-01-07 05:00:54,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:00:54,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:00:54,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:00:54,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:00:54,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:00:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:00:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-07 05:00:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-07 05:00:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:00:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:00:54,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:00:55,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:00:55,141 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-07 05:00:55,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:55 BoogieIcfgContainer [2021-01-07 05:00:55,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:00:55,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:00:55,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:00:55,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:00:55,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:00:53" (1/3) ... [2021-01-07 05:00:55,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1f2f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:00:55, skipping insertion in model container [2021-01-07 05:00:55,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:54" (2/3) ... [2021-01-07 05:00:55,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1f2f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:00:55, skipping insertion in model container [2021-01-07 05:00:55,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:55" (3/3) ... [2021-01-07 05:00:55,155 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca-2.i [2021-01-07 05:00:55,161 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:00:55,166 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-01-07 05:00:55,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-01-07 05:00:55,212 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:00:55,213 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:00:55,213 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:00:55,213 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:00:55,213 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:00:55,213 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:00:55,213 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:00:55,214 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:00:55,229 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-01-07 05:00:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-07 05:00:55,236 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:55,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:55,237 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:00:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:55,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-01-07 05:00:55,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:55,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129020587] [2021-01-07 05:00:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:55,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129020587] [2021-01-07 05:00:55,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:55,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:00:55,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073471482] [2021-01-07 05:00:55,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:00:55,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:55,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:00:55,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:00:55,495 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2021-01-07 05:00:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:55,546 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-01-07 05:00:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:00:55,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-07 05:00:55,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:55,557 INFO L225 Difference]: With dead ends: 25 [2021-01-07 05:00:55,557 INFO L226 Difference]: Without dead ends: 23 [2021-01-07 05:00:55,562 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 [2021-01-07 05:00:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-07 05:00:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-07 05:00:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-07 05:00:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-01-07 05:00:55,611 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 7 [2021-01-07 05:00:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:55,612 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-01-07 05:00:55,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:00:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-01-07 05:00:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-07 05:00:55,613 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:55,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:55,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:00:55,614 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:00:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-01-07 05:00:55,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:55,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350224106] [2021-01-07 05:00:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:55,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350224106] [2021-01-07 05:00:55,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:55,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:00:55,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939475683] [2021-01-07 05:00:55,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:00:55,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:00:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:00:55,787 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2021-01-07 05:00:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:55,862 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-01-07 05:00:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:00:55,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-07 05:00:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:55,865 INFO L225 Difference]: With dead ends: 27 [2021-01-07 05:00:55,865 INFO L226 Difference]: Without dead ends: 27 [2021-01-07 05:00:55,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:00:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-07 05:00:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-01-07 05:00:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-07 05:00:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-01-07 05:00:55,872 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2021-01-07 05:00:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:55,872 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-01-07 05:00:55,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:00:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-01-07 05:00:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:00:55,873 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:55,873 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:55,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:00:55,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:00:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:55,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2021-01-07 05:00:55,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:55,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126301795] [2021-01-07 05:00:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:55,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126301795] [2021-01-07 05:00:55,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367494964] [2021-01-07 05:00:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:56,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-07 05:00:56,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:56,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:00:56,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-01-07 05:00:56,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854111660] [2021-01-07 05:00:56,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:00:56,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:00:56,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:00:56,188 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2021-01-07 05:00:56,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:56,240 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-01-07 05:00:56,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:00:56,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-07 05:00:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:56,243 INFO L225 Difference]: With dead ends: 44 [2021-01-07 05:00:56,243 INFO L226 Difference]: Without dead ends: 44 [2021-01-07 05:00:56,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:00:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-07 05:00:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-01-07 05:00:56,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-07 05:00:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-07 05:00:56,256 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2021-01-07 05:00:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:56,257 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-07 05:00:56,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:00:56,258 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-07 05:00:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:00:56,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:56,259 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:56,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-07 05:00:56,475 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:00:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:56,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1579537130, now seen corresponding path program 1 times [2021-01-07 05:00:56,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:56,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171350802] [2021-01-07 05:00:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:56,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171350802] [2021-01-07 05:00:56,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862945170] [2021-01-07 05:00:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-07 05:00:56,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:56,717 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:00:56,718 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:56,730 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:56,731 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:00:56,731 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:00:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:56,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:00:56,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-07 05:00:56,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470649557] [2021-01-07 05:00:56,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:00:56,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:56,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:00:56,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:00:56,783 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2021-01-07 05:00:56,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:56,866 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-01-07 05:00:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:00:56,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-07 05:00:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:56,868 INFO L225 Difference]: With dead ends: 32 [2021-01-07 05:00:56,868 INFO L226 Difference]: Without dead ends: 32 [2021-01-07 05:00:56,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:00:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-07 05:00:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-01-07 05:00:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-07 05:00:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-01-07 05:00:56,873 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2021-01-07 05:00:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:56,873 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-01-07 05:00:56,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:00:56,873 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-01-07 05:00:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-07 05:00:56,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:56,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:57,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:57,088 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:00:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:57,089 INFO L82 PathProgramCache]: Analyzing trace with hash -373722351, now seen corresponding path program 1 times [2021-01-07 05:00:57,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:57,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666431098] [2021-01-07 05:00:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:57,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666431098] [2021-01-07 05:00:57,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:57,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:00:57,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342893936] [2021-01-07 05:00:57,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:00:57,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:57,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:00:57,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:00:57,207 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2021-01-07 05:00:57,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:57,344 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-01-07 05:00:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:00:57,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-01-07 05:00:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:57,347 INFO L225 Difference]: With dead ends: 30 [2021-01-07 05:00:57,347 INFO L226 Difference]: Without dead ends: 30 [2021-01-07 05:00:57,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-07 05:00:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-07 05:00:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-01-07 05:00:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-07 05:00:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-07 05:00:57,360 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2021-01-07 05:00:57,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:57,361 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-07 05:00:57,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:00:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-07 05:00:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-07 05:00:57,362 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:57,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:57,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-07 05:00:57,363 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:00:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:57,363 INFO L82 PathProgramCache]: Analyzing trace with hash -373722350, now seen corresponding path program 1 times [2021-01-07 05:00:57,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:57,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069061539] [2021-01-07 05:00:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:57,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069061539] [2021-01-07 05:00:57,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643309144] [2021-01-07 05:00:57,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-07 05:00:57,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:00,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:01:00,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-01-07 05:01:00,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139491360] [2021-01-07 05:01:00,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-07 05:01:00,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:00,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-07 05:01:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-01-07 05:01:00,003 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 12 states. [2021-01-07 05:01:00,401 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-01-07 05:01:00,555 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-01-07 05:01:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:00,879 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-01-07 05:01:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-07 05:01:00,880 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2021-01-07 05:01:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:00,881 INFO L225 Difference]: With dead ends: 57 [2021-01-07 05:01:00,882 INFO L226 Difference]: Without dead ends: 57 [2021-01-07 05:01:00,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-01-07 05:01:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-07 05:01:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2021-01-07 05:01:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-07 05:01:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-01-07 05:01:00,887 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 14 [2021-01-07 05:01:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:00,887 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-01-07 05:01:00,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-07 05:01:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-01-07 05:01:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-07 05:01:00,888 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:00,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:01,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:01:01,102 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:01:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:01,104 INFO L82 PathProgramCache]: Analyzing trace with hash 327342228, now seen corresponding path program 1 times [2021-01-07 05:01:01,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:01,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629710088] [2021-01-07 05:01:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:01,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629710088] [2021-01-07 05:01:01,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:01:01,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-07 05:01:01,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051756873] [2021-01-07 05:01:01,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-07 05:01:01,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-07 05:01:01,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:01:01,319 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 10 states. [2021-01-07 05:01:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:01,630 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-01-07 05:01:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:01:01,631 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-07 05:01:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:01,632 INFO L225 Difference]: With dead ends: 40 [2021-01-07 05:01:01,632 INFO L226 Difference]: Without dead ends: 40 [2021-01-07 05:01:01,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-01-07 05:01:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-07 05:01:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-01-07 05:01:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-07 05:01:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-01-07 05:01:01,637 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 14 [2021-01-07 05:01:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:01,637 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-01-07 05:01:01,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-07 05:01:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-01-07 05:01:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:01:01,638 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:01,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:01,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-07 05:01:01,639 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:01:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1558411319, now seen corresponding path program 1 times [2021-01-07 05:01:01,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:01,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615525866] [2021-01-07 05:01:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:01,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615525866] [2021-01-07 05:01:01,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905216457] [2021-01-07 05:01:01,775 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:01:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-07 05:01:01,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-07 05:01:02,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:01:02,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-01-07 05:01:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205884630] [2021-01-07 05:01:02,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:01:02,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:01:02,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:01:02,020 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 5 states. [2021-01-07 05:01:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:02,053 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-01-07 05:01:02,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:01:02,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-07 05:01:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:02,057 INFO L225 Difference]: With dead ends: 31 [2021-01-07 05:01:02,057 INFO L226 Difference]: Without dead ends: 28 [2021-01-07 05:01:02,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:01:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-07 05:01:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-01-07 05:01:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-07 05:01:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-07 05:01:02,061 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2021-01-07 05:01:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:02,062 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-07 05:01:02,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:01:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-07 05:01:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-07 05:01:02,063 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:02,063 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:02,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:01:02,277 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:01:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1656754904, now seen corresponding path program 1 times [2021-01-07 05:01:02,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:02,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318021918] [2021-01-07 05:01:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-07 05:01:02,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318021918] [2021-01-07 05:01:02,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:01:02,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:01:02,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072441821] [2021-01-07 05:01:02,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:01:02,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:01:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:01:02,387 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2021-01-07 05:01:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:02,458 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-01-07 05:01:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:01:02,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2021-01-07 05:01:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:02,460 INFO L225 Difference]: With dead ends: 33 [2021-01-07 05:01:02,460 INFO L226 Difference]: Without dead ends: 20 [2021-01-07 05:01:02,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:01:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-07 05:01:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-07 05:01:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-07 05:01:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-07 05:01:02,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2021-01-07 05:01:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:02,463 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-07 05:01:02,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:01:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-07 05:01:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-07 05:01:02,464 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:02,464 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:02,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-07 05:01:02,464 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:01:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1617144038, now seen corresponding path program 1 times [2021-01-07 05:01:02,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:02,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247455028] [2021-01-07 05:01:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:02,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247455028] [2021-01-07 05:01:02,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103699449] [2021-01-07 05:01:02,600 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 [2021-01-07 05:01:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-07 05:01:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:02,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:01:02,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-07 05:01:02,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622482742] [2021-01-07 05:01:02,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-07 05:01:02,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:02,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-07 05:01:02,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:01:02,799 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2021-01-07 05:01:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:02,976 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-01-07 05:01:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-07 05:01:02,980 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-07 05:01:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:02,982 INFO L225 Difference]: With dead ends: 34 [2021-01-07 05:01:02,982 INFO L226 Difference]: Without dead ends: 27 [2021-01-07 05:01:02,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-07 05:01:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-07 05:01:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-01-07 05:01:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-07 05:01:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-07 05:01:02,987 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2021-01-07 05:01:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:02,987 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-07 05:01:02,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-07 05:01:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-07 05:01:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-07 05:01:02,988 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:02,988 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:03,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-07 05:01:03,202 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:01:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash -309577815, now seen corresponding path program 2 times [2021-01-07 05:01:03,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:03,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121921201] [2021-01-07 05:01:03,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:03,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121921201] [2021-01-07 05:01:03,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349761749] [2021-01-07 05:01:03,668 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 [2021-01-07 05:01:03,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-07 05:01:03,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:01:03,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-07 05:01:03,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:04,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:01:04,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-01-07 05:01:04,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882955130] [2021-01-07 05:01:04,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-07 05:01:04,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:04,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-07 05:01:04,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-01-07 05:01:04,322 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 21 states. [2021-01-07 05:01:05,138 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-01-07 05:01:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:05,523 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-01-07 05:01:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-07 05:01:05,524 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2021-01-07 05:01:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:05,527 INFO L225 Difference]: With dead ends: 47 [2021-01-07 05:01:05,528 INFO L226 Difference]: Without dead ends: 47 [2021-01-07 05:01:05,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-01-07 05:01:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-07 05:01:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-01-07 05:01:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-07 05:01:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-01-07 05:01:05,538 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 23 [2021-01-07 05:01:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:05,541 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-01-07 05:01:05,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-07 05:01:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-01-07 05:01:05,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-07 05:01:05,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:05,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:05,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:01:05,759 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:01:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:05,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2105955092, now seen corresponding path program 3 times [2021-01-07 05:01:05,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:05,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929489633] [2021-01-07 05:01:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:06,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929489633] [2021-01-07 05:01:06,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358806092] [2021-01-07 05:01:06,278 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 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 [2021-01-07 05:01:06,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-07 05:01:06,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:01:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-07 05:01:06,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:06,498 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:01:06,500 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:01:06,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:01:06,513 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:01:06,513 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-01-07 05:01:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-07 05:01:07,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:01:07,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-01-07 05:01:07,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249771631] [2021-01-07 05:01:07,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-07 05:01:07,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:07,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-07 05:01:07,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-01-07 05:01:07,420 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 27 states. [2021-01-07 05:01:08,377 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-01-07 05:01:08,621 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-01-07 05:01:08,882 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-01-07 05:01:09,300 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-01-07 05:01:09,772 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-01-07 05:01:09,954 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-01-07 05:01:10,160 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-01-07 05:01:10,390 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-01-07 05:01:10,600 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-01-07 05:01:10,894 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-01-07 05:01:11,190 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-01-07 05:01:11,509 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-01-07 05:01:11,857 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-01-07 05:01:12,177 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-01-07 05:01:12,356 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-01-07 05:01:12,586 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-01-07 05:01:12,794 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-01-07 05:01:12,985 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-01-07 05:01:13,237 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-01-07 05:01:13,476 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-01-07 05:01:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:13,926 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-01-07 05:01:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-07 05:01:13,928 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2021-01-07 05:01:13,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:13,928 INFO L225 Difference]: With dead ends: 73 [2021-01-07 05:01:13,928 INFO L226 Difference]: Without dead ends: 73 [2021-01-07 05:01:13,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=526, Invalid=3134, Unknown=0, NotChecked=0, Total=3660 [2021-01-07 05:01:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-07 05:01:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 29. [2021-01-07 05:01:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-07 05:01:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-01-07 05:01:13,933 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2021-01-07 05:01:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:13,934 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-01-07 05:01:13,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-07 05:01:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-01-07 05:01:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-07 05:01:13,935 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:13,935 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:14,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:01:14,140 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:01:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1540133135, now seen corresponding path program 4 times [2021-01-07 05:01:14,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:14,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56081533] [2021-01-07 05:01:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:14,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56081533] [2021-01-07 05:01:14,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351099876] [2021-01-07 05:01:14,378 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 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 [2021-01-07 05:01:14,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-07 05:01:14,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:01:14,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-07 05:01:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:14,582 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:01:14,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:01:14,595 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:01:14,596 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:01:14,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-01-07 05:01:14,697 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 13 treesize of output 9 [2021-01-07 05:01:14,699 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:01:14,708 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:01:14,708 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:01:14,709 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2021-01-07 05:01:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:14,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:01:14,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-01-07 05:01:14,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790155825] [2021-01-07 05:01:14,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-07 05:01:14,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-07 05:01:14,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-01-07 05:01:14,855 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 15 states. [2021-01-07 05:01:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:15,267 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-01-07 05:01:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-07 05:01:15,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2021-01-07 05:01:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:15,269 INFO L225 Difference]: With dead ends: 48 [2021-01-07 05:01:15,269 INFO L226 Difference]: Without dead ends: 36 [2021-01-07 05:01:15,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-01-07 05:01:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-07 05:01:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-07 05:01:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-07 05:01:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-01-07 05:01:15,273 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2021-01-07 05:01:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:15,273 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-01-07 05:01:15,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-07 05:01:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-01-07 05:01:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-07 05:01:15,274 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:15,274 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:15,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-07 05:01:15,485 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-01-07 05:01:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:15,486 INFO L82 PathProgramCache]: Analyzing trace with hash 884722574, now seen corresponding path program 5 times [2021-01-07 05:01:15,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:15,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472144510] [2021-01-07 05:01:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-07 05:01:15,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472144510] [2021-01-07 05:01:15,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151527429] [2021-01-07 05:01:15,890 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 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 [2021-01-07 05:01:16,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-07 05:01:16,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-07 05:01:16,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-07 05:01:16,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:16,079 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-01-07 05:01:16,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:01:16,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:01:16,100 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:01:16,101 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-01-07 05:01:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:01:17,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-07 05:01:17,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-01-07 05:01:17,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419566007] [2021-01-07 05:01:17,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-07 05:01:17,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-07 05:01:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-01-07 05:01:17,063 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 25 states. [2021-01-07 05:01:17,980 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-01-07 05:01:18,220 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-01-07 05:01:18,413 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-01-07 05:01:18,643 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-01-07 05:01:18,845 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-01-07 05:01:19,073 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-01-07 05:01:19,276 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-01-07 05:01:19,503 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-01-07 05:01:19,833 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-01-07 05:01:20,045 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-01-07 05:01:20,217 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-01-07 05:01:20,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:20,223 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-01-07 05:01:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-07 05:01:20,225 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2021-01-07 05:01:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:20,225 INFO L225 Difference]: With dead ends: 38 [2021-01-07 05:01:20,225 INFO L226 Difference]: Without dead ends: 0 [2021-01-07 05:01:20,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-01-07 05:01:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-07 05:01:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-07 05:01:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-07 05:01:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-07 05:01:20,227 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-01-07 05:01:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:20,229 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-07 05:01:20,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-07 05:01:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-07 05:01:20,229 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-07 05:01:20,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:01:20,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:01:20 BoogieIcfgContainer [2021-01-07 05:01:20,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:01:20,453 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:01:20,453 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:01:20,454 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:01:20,454 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:55" (3/4) ... [2021-01-07 05:01:20,457 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-07 05:01:20,468 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-01-07 05:01:20,468 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-07 05:01:20,468 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-01-07 05:01:20,517 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/openbsd_cmemrchr-alloca-2.i-witness.graphml [2021-01-07 05:01:20,517 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:01:20,521 INFO L168 Benchmark]: Toolchain (without parser) took 26595.60 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.2 MB in the beginning and 143.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 20.2 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:20,522 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 79.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:01:20,522 INFO L168 Benchmark]: CACSL2BoogieTranslator took 588.33 ms. Allocated memory is still 151.0 MB. Free memory was 132.9 MB in the beginning and 125.7 MB in the end (delta: 7.3 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:20,522 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.74 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 123.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:20,523 INFO L168 Benchmark]: Boogie Preprocessor took 54.96 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 122.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:20,523 INFO L168 Benchmark]: RCFGBuilder took 495.33 ms. Allocated memory is still 151.0 MB. Free memory was 122.5 MB in the beginning and 105.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:20,524 INFO L168 Benchmark]: TraceAbstraction took 25305.80 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 105.1 MB in the beginning and 145.9 MB in the end (delta: -40.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:01:20,524 INFO L168 Benchmark]: Witness Printer took 63.61 ms. Allocated memory is still 181.4 MB. Free memory was 145.9 MB in the beginning and 143.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:20,526 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 79.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 588.33 ms. Allocated memory is still 151.0 MB. Free memory was 132.9 MB in the beginning and 125.7 MB in the end (delta: 7.3 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 78.74 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 123.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.96 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 122.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 495.33 ms. Allocated memory is still 151.0 MB. Free memory was 122.5 MB in the beginning and 105.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25305.80 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 105.1 MB in the beginning and 145.9 MB in the end (delta: -40.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 63.61 ms. Allocated memory is still 181.4 MB. Free memory was 145.9 MB in the beginning and 143.0 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: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.2s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 13.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 238 SDtfs, 712 SDslu, 1149 SDs, 0 SdLazy, 1860 SolverSat, 186 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 361 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 16.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 117 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 421 NumberOfCodeBlocks, 413 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 398 ConstructedInterpolants, 1 QuantifiedInterpolants, 84686 SizeOfPredicates, 71 NumberOfNonLiveVariables, 830 ConjunctsInSsa, 216 ConjunctsInUnsatCore, 23 InterpolantComputations, 7 PerfectInterpolantSequences, 58/151 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...