java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv --cacsl2boogietranslator.bitprecise.bitfields false -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_true-valid-memsafety.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-408c70d-m [2018-04-12 15:15:37,932 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-04-12 15:15:37,934 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-04-12 15:15:37,948 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-04-12 15:15:37,948 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-04-12 15:15:37,949 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-04-12 15:15:37,950 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-04-12 15:15:37,952 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-04-12 15:15:37,953 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-04-12 15:15:37,954 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-04-12 15:15:37,955 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-04-12 15:15:37,955 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-04-12 15:15:37,956 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-04-12 15:15:37,957 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-04-12 15:15:37,957 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-04-12 15:15:37,959 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-04-12 15:15:37,960 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-04-12 15:15:37,962 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-04-12 15:15:37,963 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-04-12 15:15:37,964 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-04-12 15:15:37,965 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-04-12 15:15:37,965 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-04-12 15:15:37,966 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-04-12 15:15:37,966 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-04-12 15:15:37,967 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-04-12 15:15:37,968 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-04-12 15:15:37,968 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-04-12 15:15:37,968 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-04-12 15:15:37,969 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-04-12 15:15:37,969 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-04-12 15:15:37,970 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-04-12 15:15:37,970 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-04-12 15:15:37,979 INFO L110 SettingsManager]: Loading preferences was successful [2018-04-12 15:15:37,979 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-04-12 15:15:37,980 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-04-12 15:15:37,980 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-04-12 15:15:37,980 INFO L133 SettingsManager]: * Use SBE=true [2018-04-12 15:15:37,980 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-04-12 15:15:37,981 INFO L133 SettingsManager]: * sizeof long=4 [2018-04-12 15:15:37,981 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-04-12 15:15:37,981 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-04-12 15:15:37,981 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-04-12 15:15:37,981 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-04-12 15:15:37,981 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-04-12 15:15:37,981 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-04-12 15:15:37,982 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-04-12 15:15:37,982 INFO L133 SettingsManager]: * sizeof long double=12 [2018-04-12 15:15:37,982 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-04-12 15:15:37,982 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-04-12 15:15:37,982 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-04-12 15:15:37,982 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-04-12 15:15:37,982 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-12 15:15:37,983 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-04-12 15:15:37,983 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-04-12 15:15:37,983 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-04-12 15:15:37,983 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Bitprecise bitfields -> false [2018-04-12 15:15:38,011 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-04-12 15:15:38,023 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-04-12 15:15:38,026 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-04-12 15:15:38,028 INFO L271 PluginConnector]: Initializing CDTParser... [2018-04-12 15:15:38,029 INFO L276 PluginConnector]: CDTParser initialized [2018-04-12 15:15:38,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_true-valid-memsafety.c [2018-04-12 15:15:38,312 INFO L225 CDTParser]: Created temporary CDT project at /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGc32f797fc [2018-04-12 15:15:38,418 INFO L287 CDTParser]: IsIndexed: true [2018-04-12 15:15:38,418 INFO L288 CDTParser]: Found 1 translation units. [2018-04-12 15:15:38,418 INFO L168 CDTParser]: Scanning ArraysOfVariableLength_true-valid-memsafety.c [2018-04-12 15:15:38,419 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-04-12 15:15:38,419 INFO L215 ultiparseSymbolTable]: [2018-04-12 15:15:38,419 INFO L218 ultiparseSymbolTable]: Function table: [2018-04-12 15:15:38,419 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in ArraysOfVariableLength_true-valid-memsafety.c [2018-04-12 15:15:38,419 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo ('foo') in ArraysOfVariableLength_true-valid-memsafety.c [2018-04-12 15:15:38,419 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-04-12 15:15:38,419 INFO L233 ultiparseSymbolTable]: [2018-04-12 15:15:38,431 INFO L330 CDTParser]: Deleted temporary CDT project at /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGc32f797fc [2018-04-12 15:15:38,433 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-04-12 15:15:38,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-04-12 15:15:38,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-04-12 15:15:38,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-04-12 15:15:38,439 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-04-12 15:15:38,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.04 03:15:38" (1/1) ... [2018-04-12 15:15:38,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599d166f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38, skipping insertion in model container [2018-04-12 15:15:38,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.04 03:15:38" (1/1) ... [2018-04-12 15:15:38,452 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-12 15:15:38,460 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-12 15:15:38,556 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-12 15:15:38,575 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-12 15:15:38,579 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 9 non ball SCCs. Number of states in SCCs 9. [2018-04-12 15:15:38,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38 WrapperNode [2018-04-12 15:15:38,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-04-12 15:15:38,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-04-12 15:15:38,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-04-12 15:15:38,587 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-04-12 15:15:38,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38" (1/1) ... [2018-04-12 15:15:38,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38" (1/1) ... [2018-04-12 15:15:38,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38" (1/1) ... [2018-04-12 15:15:38,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38" (1/1) ... [2018-04-12 15:15:38,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38" (1/1) ... [2018-04-12 15:15:38,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38" (1/1) ... [2018-04-12 15:15:38,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38" (1/1) ... [2018-04-12 15:15:38,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-04-12 15:15:38,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-04-12 15:15:38,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-04-12 15:15:38,613 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-04-12 15:15:38,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38" (1/1) ... No working directory specified, using /home/ultimate/work/ultimate/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 [2018-04-12 15:15:38,649 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-04-12 15:15:38,649 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-04-12 15:15:38,649 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo [2018-04-12 15:15:38,649 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-04-12 15:15:38,649 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo [2018-04-12 15:15:38,649 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-04-12 15:15:38,649 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-04-12 15:15:38,649 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-04-12 15:15:38,649 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-04-12 15:15:38,649 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-04-12 15:15:38,649 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-04-12 15:15:38,650 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-04-12 15:15:38,650 INFO L128 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-04-12 15:15:38,829 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-04-12 15:15:38,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.04 03:15:38 BoogieIcfgContainer [2018-04-12 15:15:38,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-04-12 15:15:38,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-04-12 15:15:38,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-04-12 15:15:38,833 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-04-12 15:15:38,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.04 03:15:38" (1/3) ... [2018-04-12 15:15:38,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c36b458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.04 03:15:38, skipping insertion in model container [2018-04-12 15:15:38,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.04 03:15:38" (2/3) ... [2018-04-12 15:15:38,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c36b458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.04 03:15:38, skipping insertion in model container [2018-04-12 15:15:38,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.04 03:15:38" (3/3) ... [2018-04-12 15:15:38,835 INFO L107 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_true-valid-memsafety.c [2018-04-12 15:15:38,841 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-04-12 15:15:38,846 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-04-12 15:15:38,870 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-04-12 15:15:38,871 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-04-12 15:15:38,871 INFO L370 AbstractCegarLoop]: Hoare is false [2018-04-12 15:15:38,871 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-04-12 15:15:38,871 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-04-12 15:15:38,871 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-04-12 15:15:38,871 INFO L374 AbstractCegarLoop]: Difference is false [2018-04-12 15:15:38,871 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-04-12 15:15:38,872 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-04-12 15:15:38,872 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-04-12 15:15:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-04-12 15:15:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-04-12 15:15:38,890 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:38,891 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:38,891 INFO L408 AbstractCegarLoop]: === Iteration 1 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:38,894 INFO L82 PathProgramCache]: Analyzing trace with hash 154629517, now seen corresponding path program 1 times [2018-04-12 15:15:38,895 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:38,895 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:38,926 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:38,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:38,926 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:38,960 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:38,980 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-12 15:15:38,980 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-04-12 15:15:38,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-04-12 15:15:38,989 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-04-12 15:15:38,990 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-04-12 15:15:38,991 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2018-04-12 15:15:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:39,004 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-04-12 15:15:39,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-04-12 15:15:39,005 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-04-12 15:15:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:39,011 INFO L225 Difference]: With dead ends: 49 [2018-04-12 15:15:39,011 INFO L226 Difference]: Without dead ends: 46 [2018-04-12 15:15:39,012 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-04-12 15:15:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-04-12 15:15:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-04-12 15:15:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-04-12 15:15:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2018-04-12 15:15:39,034 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 13 [2018-04-12 15:15:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:39,034 INFO L459 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2018-04-12 15:15:39,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-04-12 15:15:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2018-04-12 15:15:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-04-12 15:15:39,035 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:39,035 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:39,035 INFO L408 AbstractCegarLoop]: === Iteration 2 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:39,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1849425411, now seen corresponding path program 1 times [2018-04-12 15:15:39,035 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:39,036 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:39,036 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:39,036 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:39,054 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:39,099 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-12 15:15:39,099 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-04-12 15:15:39,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-12 15:15:39,101 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-12 15:15:39,101 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-12 15:15:39,101 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 5 states. [2018-04-12 15:15:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:39,205 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2018-04-12 15:15:39,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-04-12 15:15:39,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-04-12 15:15:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:39,206 INFO L225 Difference]: With dead ends: 73 [2018-04-12 15:15:39,206 INFO L226 Difference]: Without dead ends: 73 [2018-04-12 15:15:39,207 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-04-12 15:15:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-04-12 15:15:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2018-04-12 15:15:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-04-12 15:15:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2018-04-12 15:15:39,213 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 15 [2018-04-12 15:15:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:39,213 INFO L459 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2018-04-12 15:15:39,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-12 15:15:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2018-04-12 15:15:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-04-12 15:15:39,214 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:39,214 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:39,214 INFO L408 AbstractCegarLoop]: === Iteration 3 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:39,215 INFO L82 PathProgramCache]: Analyzing trace with hash -779177800, now seen corresponding path program 1 times [2018-04-12 15:15:39,215 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:39,215 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:39,216 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:39,216 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:39,226 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:39,253 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-12 15:15:39,254 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-04-12 15:15:39,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-04-12 15:15:39,254 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-04-12 15:15:39,254 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-04-12 15:15:39,255 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 3 states. [2018-04-12 15:15:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:39,282 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-04-12 15:15:39,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-04-12 15:15:39,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-04-12 15:15:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:39,285 INFO L225 Difference]: With dead ends: 55 [2018-04-12 15:15:39,285 INFO L226 Difference]: Without dead ends: 55 [2018-04-12 15:15:39,285 INFO L567 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 [2018-04-12 15:15:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-04-12 15:15:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-04-12 15:15:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-04-12 15:15:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2018-04-12 15:15:39,289 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 19 [2018-04-12 15:15:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:39,289 INFO L459 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2018-04-12 15:15:39,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-04-12 15:15:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2018-04-12 15:15:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-04-12 15:15:39,290 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:39,290 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:39,290 INFO L408 AbstractCegarLoop]: === Iteration 4 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:39,290 INFO L82 PathProgramCache]: Analyzing trace with hash -779177799, now seen corresponding path program 1 times [2018-04-12 15:15:39,291 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:39,291 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:39,291 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:39,292 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:39,302 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:39,332 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-12 15:15:39,333 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-04-12 15:15:39,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-12 15:15:39,333 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-12 15:15:39,333 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-12 15:15:39,334 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 4 states. [2018-04-12 15:15:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:39,369 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-04-12 15:15:39,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-12 15:15:39,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-04-12 15:15:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:39,370 INFO L225 Difference]: With dead ends: 65 [2018-04-12 15:15:39,370 INFO L226 Difference]: Without dead ends: 65 [2018-04-12 15:15:39,370 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-12 15:15:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-04-12 15:15:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2018-04-12 15:15:39,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-04-12 15:15:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2018-04-12 15:15:39,373 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 19 [2018-04-12 15:15:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:39,373 INFO L459 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2018-04-12 15:15:39,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-12 15:15:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2018-04-12 15:15:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-04-12 15:15:39,374 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:39,374 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:39,374 INFO L408 AbstractCegarLoop]: === Iteration 5 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:39,374 INFO L82 PathProgramCache]: Analyzing trace with hash 226405917, now seen corresponding path program 1 times [2018-04-12 15:15:39,374 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:39,374 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:39,375 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:39,375 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:39,389 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-12 15:15:39,425 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-12 15:15:39,426 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-04-12 15:15:39,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-12 15:15:39,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-12 15:15:39,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-12 15:15:39,426 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 5 states. [2018-04-12 15:15:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:39,475 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-04-12 15:15:39,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-04-12 15:15:39,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-04-12 15:15:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:39,476 INFO L225 Difference]: With dead ends: 69 [2018-04-12 15:15:39,476 INFO L226 Difference]: Without dead ends: 69 [2018-04-12 15:15:39,476 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-04-12 15:15:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-04-12 15:15:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2018-04-12 15:15:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-04-12 15:15:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2018-04-12 15:15:39,479 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 28 [2018-04-12 15:15:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:39,480 INFO L459 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2018-04-12 15:15:39,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-12 15:15:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2018-04-12 15:15:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-04-12 15:15:39,480 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:39,480 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:39,480 INFO L408 AbstractCegarLoop]: === Iteration 6 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:39,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1571351062, now seen corresponding path program 1 times [2018-04-12 15:15:39,481 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:39,481 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:39,481 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:39,481 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:39,489 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:39,523 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-12 15:15:39,523 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-04-12 15:15:39,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-12 15:15:39,524 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-12 15:15:39,524 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-12 15:15:39,524 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 5 states. [2018-04-12 15:15:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:39,557 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-04-12 15:15:39,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-04-12 15:15:39,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-04-12 15:15:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:39,558 INFO L225 Difference]: With dead ends: 60 [2018-04-12 15:15:39,558 INFO L226 Difference]: Without dead ends: 60 [2018-04-12 15:15:39,558 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-04-12 15:15:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-04-12 15:15:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-04-12 15:15:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-04-12 15:15:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2018-04-12 15:15:39,562 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 29 [2018-04-12 15:15:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:39,563 INFO L459 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2018-04-12 15:15:39,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-12 15:15:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2018-04-12 15:15:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-04-12 15:15:39,564 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:39,564 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:39,564 INFO L408 AbstractCegarLoop]: === Iteration 7 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:39,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1571351061, now seen corresponding path program 1 times [2018-04-12 15:15:39,564 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:39,564 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:39,565 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:39,565 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:39,575 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:39,651 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 15:15:39,652 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 15:15:39,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:39,677 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 15:15:39,705 INFO L477 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 [2018-04-12 15:15:39,706 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-12 15:15:39,710 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-12 15:15:39,710 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-12 15:15:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-12 15:15:39,799 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-04-12 15:15:39,799 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2018-04-12 15:15:39,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-04-12 15:15:39,800 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-04-12 15:15:39,800 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-04-12 15:15:39,800 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 11 states. [2018-04-12 15:15:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:39,943 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-04-12 15:15:39,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-04-12 15:15:39,944 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-04-12 15:15:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:39,944 INFO L225 Difference]: With dead ends: 72 [2018-04-12 15:15:39,944 INFO L226 Difference]: Without dead ends: 72 [2018-04-12 15:15:39,945 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-04-12 15:15:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-04-12 15:15:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2018-04-12 15:15:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-04-12 15:15:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2018-04-12 15:15:39,947 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 29 [2018-04-12 15:15:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:39,948 INFO L459 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2018-04-12 15:15:39,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-04-12 15:15:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2018-04-12 15:15:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-04-12 15:15:39,948 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:39,948 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:39,948 INFO L408 AbstractCegarLoop]: === Iteration 8 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:39,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1318599725, now seen corresponding path program 1 times [2018-04-12 15:15:39,948 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:39,948 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:39,949 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:39,949 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:39,956 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-04-12 15:15:40,035 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-12 15:15:40,035 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-04-12 15:15:40,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-04-12 15:15:40,036 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-04-12 15:15:40,036 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-04-12 15:15:40,036 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 6 states. [2018-04-12 15:15:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:40,071 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-04-12 15:15:40,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-12 15:15:40,071 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-04-12 15:15:40,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:40,071 INFO L225 Difference]: With dead ends: 64 [2018-04-12 15:15:40,072 INFO L226 Difference]: Without dead ends: 64 [2018-04-12 15:15:40,072 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-04-12 15:15:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-04-12 15:15:40,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2018-04-12 15:15:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-04-12 15:15:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-04-12 15:15:40,074 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 32 [2018-04-12 15:15:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:40,074 INFO L459 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-04-12 15:15:40,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-04-12 15:15:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-04-12 15:15:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-04-12 15:15:40,075 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:40,075 INFO L355 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:40,075 INFO L408 AbstractCegarLoop]: === Iteration 9 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:40,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1420824426, now seen corresponding path program 1 times [2018-04-12 15:15:40,076 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:40,076 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:40,076 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:40,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:40,076 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:40,084 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:40,099 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 15:15:40,100 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 15:15:40,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:40,117 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 15:15:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:40,146 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 15:15:40,147 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-04-12 15:15:40,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-12 15:15:40,147 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-12 15:15:40,147 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-04-12 15:15:40,147 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 5 states. [2018-04-12 15:15:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:40,185 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2018-04-12 15:15:40,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-12 15:15:40,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-04-12 15:15:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:40,187 INFO L225 Difference]: With dead ends: 83 [2018-04-12 15:15:40,187 INFO L226 Difference]: Without dead ends: 83 [2018-04-12 15:15:40,188 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-04-12 15:15:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-04-12 15:15:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2018-04-12 15:15:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-04-12 15:15:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-04-12 15:15:40,195 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 32 [2018-04-12 15:15:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:40,196 INFO L459 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-04-12 15:15:40,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-12 15:15:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-04-12 15:15:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-04-12 15:15:40,196 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:40,196 INFO L355 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:40,197 INFO L408 AbstractCegarLoop]: === Iteration 10 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1549959115, now seen corresponding path program 1 times [2018-04-12 15:15:40,197 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:40,197 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:40,198 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:40,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:40,198 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:40,207 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:40,246 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 15:15:40,246 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 15:15:40,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:40,274 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 15:15:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-12 15:15:40,315 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 15:15:40,315 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2018-04-12 15:15:40,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-04-12 15:15:40,315 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-04-12 15:15:40,315 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-04-12 15:15:40,316 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 11 states. [2018-04-12 15:15:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:40,414 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2018-04-12 15:15:40,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-12 15:15:40,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2018-04-12 15:15:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:40,415 INFO L225 Difference]: With dead ends: 98 [2018-04-12 15:15:40,415 INFO L226 Difference]: Without dead ends: 98 [2018-04-12 15:15:40,415 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-04-12 15:15:40,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-04-12 15:15:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2018-04-12 15:15:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-04-12 15:15:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2018-04-12 15:15:40,420 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 34 [2018-04-12 15:15:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:40,420 INFO L459 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2018-04-12 15:15:40,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-04-12 15:15:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2018-04-12 15:15:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-04-12 15:15:40,421 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:40,421 INFO L355 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:40,421 INFO L408 AbstractCegarLoop]: === Iteration 11 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:40,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2056533948, now seen corresponding path program 2 times [2018-04-12 15:15:40,421 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:40,421 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:40,422 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:40,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-12 15:15:40,422 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:40,431 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-04-12 15:15:40,463 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 15:15:40,463 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 15:15:40,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 15:15:40,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-04-12 15:15:40,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 15:15:40,478 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 15:15:40,555 INFO L700 Elim1Store]: detected not equals via solver [2018-04-12 15:15:40,556 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-04-12 15:15:40,556 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-12 15:15:40,558 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-04-12 15:15:40,558 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-04-12 15:15:40,583 INFO L700 Elim1Store]: detected not equals via solver [2018-04-12 15:15:40,584 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-04-12 15:15:40,584 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-12 15:15:40,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-04-12 15:15:40,585 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-04-12 15:15:40,601 WARN L1033 $PredicateComparison]: unable to prove that (exists ((|main_~#b~0.base| Int)) (and (= (select |c_old(#valid)| |main_~#b~0.base|) 0) (= (store |c_old(#valid)| |main_~#b~0.base| 0) |c_#valid|))) is different from true [2018-04-12 15:15:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-04-12 15:15:40,631 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-04-12 15:15:40,631 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2018-04-12 15:15:40,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-04-12 15:15:40,632 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-04-12 15:15:40,632 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=40, Unknown=1, NotChecked=12, Total=72 [2018-04-12 15:15:40,632 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 9 states. [2018-04-12 15:15:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:40,785 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-04-12 15:15:40,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-04-12 15:15:40,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2018-04-12 15:15:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:40,786 INFO L225 Difference]: With dead ends: 109 [2018-04-12 15:15:40,786 INFO L226 Difference]: Without dead ends: 68 [2018-04-12 15:15:40,786 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=175, Unknown=1, NotChecked=28, Total=272 [2018-04-12 15:15:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-04-12 15:15:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2018-04-12 15:15:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-04-12 15:15:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2018-04-12 15:15:40,790 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 45 [2018-04-12 15:15:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:40,790 INFO L459 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2018-04-12 15:15:40,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-04-12 15:15:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2018-04-12 15:15:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-04-12 15:15:40,791 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:40,791 INFO L355 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:40,791 INFO L408 AbstractCegarLoop]: === Iteration 12 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:40,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1293117989, now seen corresponding path program 2 times [2018-04-12 15:15:40,792 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:40,792 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:40,792 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:40,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 15:15:40,793 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:40,802 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-04-12 15:15:40,864 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 15:15:40,864 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 15:15:40,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-12 15:15:40,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-12 15:15:40,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 15:15:40,888 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 15:15:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-04-12 15:15:40,932 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-04-12 15:15:40,932 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2018-04-12 15:15:40,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-04-12 15:15:40,933 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-04-12 15:15:40,933 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-04-12 15:15:40,934 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 14 states. [2018-04-12 15:15:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:41,050 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-04-12 15:15:41,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-04-12 15:15:41,050 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2018-04-12 15:15:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:41,051 INFO L225 Difference]: With dead ends: 70 [2018-04-12 15:15:41,055 INFO L226 Difference]: Without dead ends: 64 [2018-04-12 15:15:41,055 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2018-04-12 15:15:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-04-12 15:15:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2018-04-12 15:15:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-04-12 15:15:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-04-12 15:15:41,059 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 47 [2018-04-12 15:15:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:41,059 INFO L459 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-04-12 15:15:41,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-04-12 15:15:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-04-12 15:15:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-04-12 15:15:41,060 INFO L347 BasicCegarLoop]: Found error trace [2018-04-12 15:15:41,060 INFO L355 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-12 15:15:41,060 INFO L408 AbstractCegarLoop]: === Iteration 13 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-12 15:15:41,060 INFO L82 PathProgramCache]: Analyzing trace with hash -183198525, now seen corresponding path program 3 times [2018-04-12 15:15:41,060 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-12 15:15:41,060 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-12 15:15:41,061 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:41,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-12 15:15:41,062 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-12 15:15:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-12 15:15:41,072 WARN L250 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-12 15:15:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-04-12 15:15:41,109 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-12 15:15:41,109 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-12 15:15:41,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-12 15:15:41,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-04-12 15:15:41,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-12 15:15:41,133 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-12 15:15:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-04-12 15:15:41,164 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-12 15:15:41,164 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2018-04-12 15:15:41,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-12 15:15:41,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-12 15:15:41,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-04-12 15:15:41,165 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 7 states. [2018-04-12 15:15:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-12 15:15:41,196 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-04-12 15:15:41,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-12 15:15:41,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2018-04-12 15:15:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-12 15:15:41,197 INFO L225 Difference]: With dead ends: 59 [2018-04-12 15:15:41,197 INFO L226 Difference]: Without dead ends: 0 [2018-04-12 15:15:41,197 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-04-12 15:15:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-04-12 15:15:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-04-12 15:15:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-04-12 15:15:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-04-12 15:15:41,198 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2018-04-12 15:15:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-12 15:15:41,198 INFO L459 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-04-12 15:15:41,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-12 15:15:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-04-12 15:15:41,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-04-12 15:15:41,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.04 03:15:41 BoogieIcfgContainer [2018-04-12 15:15:41,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-04-12 15:15:41,201 INFO L168 Benchmark]: Toolchain (without parser) took 2767.30 ms. Allocated memory was 394.3 MB in the beginning and 674.2 MB in the end (delta: 280.0 MB). Free memory was 337.4 MB in the beginning and 571.4 MB in the end (delta: -234.0 MB). Peak memory consumption was 46.0 MB. Max. memory is 5.3 GB. [2018-04-12 15:15:41,202 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 394.3 MB. Free memory is still 357.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-04-12 15:15:41,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.37 ms. Allocated memory is still 394.3 MB. Free memory was 337.4 MB in the beginning and 328.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-04-12 15:15:41,203 INFO L168 Benchmark]: Boogie Preprocessor took 26.48 ms. Allocated memory is still 394.3 MB. Free memory was 328.1 MB in the beginning and 326.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 5.3 GB. [2018-04-12 15:15:41,203 INFO L168 Benchmark]: RCFGBuilder took 216.87 ms. Allocated memory was 394.3 MB in the beginning and 591.9 MB in the end (delta: 197.7 MB). Free memory was 326.6 MB in the beginning and 553.9 MB in the end (delta: -227.3 MB). Peak memory consumption was 26.6 MB. Max. memory is 5.3 GB. [2018-04-12 15:15:41,204 INFO L168 Benchmark]: TraceAbstraction took 2370.19 ms. Allocated memory was 591.9 MB in the beginning and 674.2 MB in the end (delta: 82.3 MB). Free memory was 553.9 MB in the beginning and 571.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 64.9 MB. Max. memory is 5.3 GB. [2018-04-12 15:15:41,206 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 394.3 MB. Free memory is still 357.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 151.37 ms. Allocated memory is still 394.3 MB. Free memory was 337.4 MB in the beginning and 328.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.48 ms. Allocated memory is still 394.3 MB. Free memory was 328.1 MB in the beginning and 326.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 5.3 GB. * RCFGBuilder took 216.87 ms. Allocated memory was 394.3 MB in the beginning and 591.9 MB in the end (delta: 197.7 MB). Free memory was 326.6 MB in the beginning and 553.9 MB in the end (delta: -227.3 MB). Peak memory consumption was 26.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2370.19 ms. Allocated memory was 591.9 MB in the beginning and 674.2 MB in the end (delta: 82.3 MB). Free memory was 553.9 MB in the beginning and 571.4 MB in the end (delta: -17.4 MB). Peak memory consumption was 64.9 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 8 error locations. SAFE Result, 2.3s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 431 SDtfs, 672 SDslu, 878 SDs, 0 SdLazy, 831 SolverSat, 127 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 335 GetRequests, 242 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 110 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 635 NumberOfCodeBlocks, 590 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 616 ConstructedInterpolants, 20 QuantifiedInterpolants, 72434 SizeOfPredicates, 13 NumberOfNonLiveVariables, 633 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 19 InterpolantComputations, 10 PerfectInterpolantSequences, 217/249 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_true-valid-memsafety.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-04-12_15-15-41-213.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_true-valid-memsafety.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-04-12_15-15-41-213.csv Received shutdown request...