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 0.1.23-666feb3-m [2018-04-11 11:26:13,328 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-04-11 11:26:13,329 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-04-11 11:26:13,342 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-04-11 11:26:13,343 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-04-11 11:26:13,344 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-04-11 11:26:13,344 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-04-11 11:26:13,346 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-04-11 11:26:13,348 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-04-11 11:26:13,348 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-04-11 11:26:13,349 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-04-11 11:26:13,349 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-04-11 11:26:13,350 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-04-11 11:26:13,351 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-04-11 11:26:13,352 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-04-11 11:26:13,354 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-04-11 11:26:13,355 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-04-11 11:26:13,357 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-04-11 11:26:13,358 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-04-11 11:26:13,359 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-04-11 11:26:13,360 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-04-11 11:26:13,361 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-04-11 11:26:13,361 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-04-11 11:26:13,362 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-04-11 11:26:13,363 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-04-11 11:26:13,364 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-04-11 11:26:13,364 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-04-11 11:26:13,364 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-04-11 11:26:13,365 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-04-11 11:26:13,365 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-04-11 11:26:13,366 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-04-11 11:26:13,366 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 [2018-04-11 11:26:13,385 INFO L110 SettingsManager]: Loading preferences was successful [2018-04-11 11:26:13,386 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-04-11 11:26:13,387 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-04-11 11:26:13,387 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-04-11 11:26:13,387 INFO L133 SettingsManager]: * Use SBE=true [2018-04-11 11:26:13,387 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-04-11 11:26:13,388 INFO L133 SettingsManager]: * sizeof long=4 [2018-04-11 11:26:13,388 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-04-11 11:26:13,388 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-04-11 11:26:13,388 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-04-11 11:26:13,388 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-04-11 11:26:13,388 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-04-11 11:26:13,389 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-04-11 11:26:13,389 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-04-11 11:26:13,389 INFO L133 SettingsManager]: * sizeof long double=12 [2018-04-11 11:26:13,389 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-04-11 11:26:13,389 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-04-11 11:26:13,389 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-04-11 11:26:13,389 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-04-11 11:26:13,390 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-11 11:26:13,390 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-04-11 11:26:13,390 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-04-11 11:26:13,390 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-04-11 11:26:13,390 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Bitprecise bitfields -> false [2018-04-11 11:26:13,419 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-04-11 11:26:13,427 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-04-11 11:26:13,430 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-04-11 11:26:13,432 INFO L271 PluginConnector]: Initializing CDTParser... [2018-04-11 11:26:13,432 INFO L276 PluginConnector]: CDTParser initialized [2018-04-11 11:26:13,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_true-valid-memsafety.c [2018-04-11 11:26:13,912 INFO L225 CDTParser]: Created temporary CDT project at /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGa0ac98e78 [2018-04-11 11:26:14,006 INFO L287 CDTParser]: IsIndexed: true [2018-04-11 11:26:14,006 INFO L288 CDTParser]: Found 1 translation units. [2018-04-11 11:26:14,006 INFO L168 CDTParser]: Scanning ArraysOfVariableLength_true-valid-memsafety.c [2018-04-11 11:26:14,007 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-04-11 11:26:14,007 INFO L215 ultiparseSymbolTable]: [2018-04-11 11:26:14,007 INFO L218 ultiparseSymbolTable]: Function table: [2018-04-11 11:26:14,007 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in ArraysOfVariableLength_true-valid-memsafety.c [2018-04-11 11:26:14,007 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo ('foo') in ArraysOfVariableLength_true-valid-memsafety.c [2018-04-11 11:26:14,007 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-04-11 11:26:14,007 INFO L233 ultiparseSymbolTable]: [2018-04-11 11:26:14,023 INFO L330 CDTParser]: Deleted temporary CDT project at /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGa0ac98e78 [2018-04-11 11:26:14,027 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-04-11 11:26:14,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-04-11 11:26:14,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-04-11 11:26:14,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-04-11 11:26:14,034 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-04-11 11:26:14,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.04 11:26:14" (1/1) ... [2018-04-11 11:26:14,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21803cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14, skipping insertion in model container [2018-04-11 11:26:14,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.04 11:26:14" (1/1) ... [2018-04-11 11:26:14,053 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-11 11:26:14,066 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-11 11:26:14,193 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-11 11:26:14,213 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-11 11:26:14,218 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 9 non ball SCCs. Number of states in SCCs 9. [2018-04-11 11:26:14,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14 WrapperNode [2018-04-11 11:26:14,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-04-11 11:26:14,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-04-11 11:26:14,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-04-11 11:26:14,225 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-04-11 11:26:14,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14" (1/1) ... [2018-04-11 11:26:14,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14" (1/1) ... [2018-04-11 11:26:14,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14" (1/1) ... [2018-04-11 11:26:14,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14" (1/1) ... [2018-04-11 11:26:14,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14" (1/1) ... [2018-04-11 11:26:14,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14" (1/1) ... [2018-04-11 11:26:14,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14" (1/1) ... [2018-04-11 11:26:14,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-04-11 11:26:14,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-04-11 11:26:14,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-04-11 11:26:14,252 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-04-11 11:26:14,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14" (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 [2018-04-11 11:26:14,302 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-04-11 11:26:14,302 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-04-11 11:26:14,302 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo [2018-04-11 11:26:14,302 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-04-11 11:26:14,303 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo [2018-04-11 11:26:14,303 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-04-11 11:26:14,303 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-04-11 11:26:14,303 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-04-11 11:26:14,303 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-04-11 11:26:14,303 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-04-11 11:26:14,303 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-04-11 11:26:14,303 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-04-11 11:26:14,304 INFO L128 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-04-11 11:26:14,521 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-04-11 11:26:14,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.04 11:26:14 BoogieIcfgContainer [2018-04-11 11:26:14,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-04-11 11:26:14,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-04-11 11:26:14,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-04-11 11:26:14,525 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-04-11 11:26:14,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.04 11:26:14" (1/3) ... [2018-04-11 11:26:14,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e6122d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.04 11:26:14, skipping insertion in model container [2018-04-11 11:26:14,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 11:26:14" (2/3) ... [2018-04-11 11:26:14,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e6122d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.04 11:26:14, skipping insertion in model container [2018-04-11 11:26:14,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.04 11:26:14" (3/3) ... [2018-04-11 11:26:14,527 INFO L107 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_true-valid-memsafety.c [2018-04-11 11:26:14,533 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-04-11 11:26:14,538 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-04-11 11:26:14,566 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-04-11 11:26:14,567 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-04-11 11:26:14,568 INFO L370 AbstractCegarLoop]: Hoare is false [2018-04-11 11:26:14,568 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-04-11 11:26:14,568 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-04-11 11:26:14,568 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-04-11 11:26:14,568 INFO L374 AbstractCegarLoop]: Difference is false [2018-04-11 11:26:14,568 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-04-11 11:26:14,568 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-04-11 11:26:14,569 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-04-11 11:26:14,582 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2018-04-11 11:26:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-04-11 11:26:14,589 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:14,590 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 11:26:14,590 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]=== [2018-04-11 11:26:14,593 INFO L82 PathProgramCache]: Analyzing trace with hash 154629517, now seen corresponding path program 1 times [2018-04-11 11:26:14,595 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:14,595 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:14,630 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:14,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:14,630 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:14,664 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:14,686 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-11 11:26:14,686 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-04-11 11:26:14,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-04-11 11:26:14,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-04-11 11:26:14,699 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-04-11 11:26:14,701 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 2 states. [2018-04-11 11:26:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:14,718 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-04-11 11:26:14,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-04-11 11:26:14,719 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2018-04-11 11:26:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:14,725 INFO L225 Difference]: With dead ends: 49 [2018-04-11 11:26:14,725 INFO L226 Difference]: Without dead ends: 46 [2018-04-11 11:26:14,727 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 [2018-04-11 11:26:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-04-11 11:26:14,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-04-11 11:26:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-04-11 11:26:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2018-04-11 11:26:14,752 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 13 [2018-04-11 11:26:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:14,753 INFO L459 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2018-04-11 11:26:14,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-04-11 11:26:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2018-04-11 11:26:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-04-11 11:26:14,753 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:14,754 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 11:26:14,754 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]=== [2018-04-11 11:26:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1849425411, now seen corresponding path program 1 times [2018-04-11 11:26:14,754 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:14,754 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:14,757 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:14,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:14,809 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:14,825 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:14,893 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-11 11:26:14,893 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-04-11 11:26:14,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-11 11:26:14,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-11 11:26:14,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-11 11:26:14,894 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 5 states. [2018-04-11 11:26:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:15,003 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2018-04-11 11:26:15,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-04-11 11:26:15,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-04-11 11:26:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:15,004 INFO L225 Difference]: With dead ends: 73 [2018-04-11 11:26:15,004 INFO L226 Difference]: Without dead ends: 73 [2018-04-11 11:26:15,005 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 [2018-04-11 11:26:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-04-11 11:26:15,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2018-04-11 11:26:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-04-11 11:26:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2018-04-11 11:26:15,009 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 15 [2018-04-11 11:26:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:15,009 INFO L459 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2018-04-11 11:26:15,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-11 11:26:15,009 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2018-04-11 11:26:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-04-11 11:26:15,009 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:15,009 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 11:26:15,010 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]=== [2018-04-11 11:26:15,010 INFO L82 PathProgramCache]: Analyzing trace with hash -779177800, now seen corresponding path program 1 times [2018-04-11 11:26:15,010 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:15,010 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:15,010 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:15,011 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:15,018 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:15,032 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-11 11:26:15,032 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-04-11 11:26:15,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-04-11 11:26:15,033 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-04-11 11:26:15,033 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-04-11 11:26:15,033 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 3 states. [2018-04-11 11:26:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:15,049 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-04-11 11:26:15,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-04-11 11:26:15,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-04-11 11:26:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:15,051 INFO L225 Difference]: With dead ends: 55 [2018-04-11 11:26:15,052 INFO L226 Difference]: Without dead ends: 55 [2018-04-11 11:26:15,052 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 [2018-04-11 11:26:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-04-11 11:26:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-04-11 11:26:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-04-11 11:26:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2018-04-11 11:26:15,058 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 19 [2018-04-11 11:26:15,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:15,058 INFO L459 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2018-04-11 11:26:15,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-04-11 11:26:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2018-04-11 11:26:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-04-11 11:26:15,059 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:15,059 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 11:26:15,059 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]=== [2018-04-11 11:26:15,060 INFO L82 PathProgramCache]: Analyzing trace with hash -779177799, now seen corresponding path program 1 times [2018-04-11 11:26:15,060 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:15,060 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:15,061 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:15,061 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:15,076 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:15,133 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-11 11:26:15,134 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-04-11 11:26:15,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-11 11:26:15,134 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-11 11:26:15,134 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-11 11:26:15,135 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 4 states. [2018-04-11 11:26:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:15,202 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-04-11 11:26:15,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-11 11:26:15,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-04-11 11:26:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:15,203 INFO L225 Difference]: With dead ends: 65 [2018-04-11 11:26:15,203 INFO L226 Difference]: Without dead ends: 65 [2018-04-11 11:26:15,203 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 [2018-04-11 11:26:15,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-04-11 11:26:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2018-04-11 11:26:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-04-11 11:26:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2018-04-11 11:26:15,206 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 19 [2018-04-11 11:26:15,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:15,206 INFO L459 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2018-04-11 11:26:15,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-11 11:26:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2018-04-11 11:26:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-04-11 11:26:15,207 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:15,207 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] [2018-04-11 11:26:15,207 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]=== [2018-04-11 11:26:15,207 INFO L82 PathProgramCache]: Analyzing trace with hash 226405917, now seen corresponding path program 1 times [2018-04-11 11:26:15,207 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:15,207 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:15,208 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:15,208 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:15,222 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-11 11:26:15,267 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-11 11:26:15,267 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-04-11 11:26:15,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-11 11:26:15,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-11 11:26:15,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-11 11:26:15,268 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 5 states. [2018-04-11 11:26:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:15,339 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-04-11 11:26:15,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-04-11 11:26:15,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-04-11 11:26:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:15,340 INFO L225 Difference]: With dead ends: 69 [2018-04-11 11:26:15,340 INFO L226 Difference]: Without dead ends: 69 [2018-04-11 11:26:15,341 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 [2018-04-11 11:26:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-04-11 11:26:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2018-04-11 11:26:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-04-11 11:26:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2018-04-11 11:26:15,346 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 28 [2018-04-11 11:26:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:15,347 INFO L459 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2018-04-11 11:26:15,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-11 11:26:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2018-04-11 11:26:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-04-11 11:26:15,347 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:15,348 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] [2018-04-11 11:26:15,348 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]=== [2018-04-11 11:26:15,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1571351062, now seen corresponding path program 1 times [2018-04-11 11:26:15,348 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:15,348 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:15,349 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:15,349 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:15,360 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:15,392 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-11 11:26:15,392 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-04-11 11:26:15,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-11 11:26:15,392 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-11 11:26:15,392 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-11 11:26:15,393 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 5 states. [2018-04-11 11:26:15,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:15,459 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-04-11 11:26:15,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-04-11 11:26:15,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-04-11 11:26:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:15,460 INFO L225 Difference]: With dead ends: 60 [2018-04-11 11:26:15,460 INFO L226 Difference]: Without dead ends: 60 [2018-04-11 11:26:15,461 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 [2018-04-11 11:26:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-04-11 11:26:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-04-11 11:26:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-04-11 11:26:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2018-04-11 11:26:15,466 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 29 [2018-04-11 11:26:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:15,466 INFO L459 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2018-04-11 11:26:15,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-11 11:26:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2018-04-11 11:26:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-04-11 11:26:15,467 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:15,467 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] [2018-04-11 11:26:15,468 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]=== [2018-04-11 11:26:15,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1571351061, now seen corresponding path program 1 times [2018-04-11 11:26:15,468 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:15,468 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:15,469 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:15,469 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:15,479 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:15,578 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 11:26:15,578 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 [2018-04-11 11:26:15,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:15,619 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 11:26:15,648 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 [2018-04-11 11:26:15,649 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-11 11:26:15,655 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-11 11:26:15,655 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-11 11:26:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-11 11:26:15,747 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-04-11 11:26:15,747 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2018-04-11 11:26:15,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-04-11 11:26:15,748 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-04-11 11:26:15,748 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-04-11 11:26:15,748 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 11 states. [2018-04-11 11:26:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:15,898 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-04-11 11:26:15,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-04-11 11:26:15,898 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-04-11 11:26:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:15,899 INFO L225 Difference]: With dead ends: 72 [2018-04-11 11:26:15,899 INFO L226 Difference]: Without dead ends: 72 [2018-04-11 11:26:15,899 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 [2018-04-11 11:26:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-04-11 11:26:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2018-04-11 11:26:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-04-11 11:26:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2018-04-11 11:26:15,903 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 29 [2018-04-11 11:26:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:15,903 INFO L459 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2018-04-11 11:26:15,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-04-11 11:26:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2018-04-11 11:26:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-04-11 11:26:15,904 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:15,904 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] [2018-04-11 11:26:15,904 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]=== [2018-04-11 11:26:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1318599725, now seen corresponding path program 1 times [2018-04-11 11:26:15,904 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:15,904 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:15,905 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:15,905 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:15,915 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-04-11 11:26:16,000 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-11 11:26:16,000 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-04-11 11:26:16,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-04-11 11:26:16,001 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-04-11 11:26:16,001 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-04-11 11:26:16,001 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 6 states. [2018-04-11 11:26:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:16,062 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-04-11 11:26:16,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-11 11:26:16,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-04-11 11:26:16,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:16,063 INFO L225 Difference]: With dead ends: 64 [2018-04-11 11:26:16,063 INFO L226 Difference]: Without dead ends: 64 [2018-04-11 11:26:16,063 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 [2018-04-11 11:26:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-04-11 11:26:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2018-04-11 11:26:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-04-11 11:26:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2018-04-11 11:26:16,066 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 32 [2018-04-11 11:26:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:16,067 INFO L459 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2018-04-11 11:26:16,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-04-11 11:26:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2018-04-11 11:26:16,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-04-11 11:26:16,068 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:16,068 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] [2018-04-11 11:26:16,068 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]=== [2018-04-11 11:26:16,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1420824426, now seen corresponding path program 1 times [2018-04-11 11:26:16,068 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:16,068 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:16,069 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:16,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:16,069 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:16,078 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:16,104 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 11:26:16,104 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 [2018-04-11 11:26:16,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:16,138 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 11:26:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:16,179 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 11:26:16,179 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-04-11 11:26:16,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-11 11:26:16,179 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-11 11:26:16,180 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-04-11 11:26:16,180 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 5 states. [2018-04-11 11:26:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:16,246 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2018-04-11 11:26:16,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-11 11:26:16,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-04-11 11:26:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:16,248 INFO L225 Difference]: With dead ends: 83 [2018-04-11 11:26:16,248 INFO L226 Difference]: Without dead ends: 83 [2018-04-11 11:26:16,248 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 [2018-04-11 11:26:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-04-11 11:26:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2018-04-11 11:26:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-04-11 11:26:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-04-11 11:26:16,257 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 32 [2018-04-11 11:26:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:16,257 INFO L459 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-04-11 11:26:16,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-11 11:26:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-04-11 11:26:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-04-11 11:26:16,258 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:16,258 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] [2018-04-11 11:26:16,258 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]=== [2018-04-11 11:26:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1549959115, now seen corresponding path program 1 times [2018-04-11 11:26:16,258 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:16,259 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:16,259 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:16,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:16,259 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:16,269 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:16,363 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 11:26:16,363 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 [2018-04-11 11:26:16,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:16,389 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 11:26:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 11:26:16,449 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 11:26:16,450 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2018-04-11 11:26:16,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-04-11 11:26:16,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-04-11 11:26:16,450 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-04-11 11:26:16,450 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 11 states. [2018-04-11 11:26:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:16,546 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2018-04-11 11:26:16,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-11 11:26:16,546 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2018-04-11 11:26:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:16,547 INFO L225 Difference]: With dead ends: 98 [2018-04-11 11:26:16,547 INFO L226 Difference]: Without dead ends: 98 [2018-04-11 11:26:16,547 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-04-11 11:26:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-04-11 11:26:16,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2018-04-11 11:26:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-04-11 11:26:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2018-04-11 11:26:16,551 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 34 [2018-04-11 11:26:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:16,551 INFO L459 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2018-04-11 11:26:16,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-04-11 11:26:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2018-04-11 11:26:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-04-11 11:26:16,552 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:16,552 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] [2018-04-11 11:26:16,552 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]=== [2018-04-11 11:26:16,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2056533948, now seen corresponding path program 2 times [2018-04-11 11:26:16,552 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:16,552 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:16,553 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:16,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 11:26:16,553 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:16,561 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-04-11 11:26:16,591 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 11:26:16,591 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 [2018-04-11 11:26:16,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 11:26:16,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-04-11 11:26:16,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 11:26:16,616 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 11:26:16,635 INFO L700 Elim1Store]: detected not equals via solver [2018-04-11 11:26:16,636 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 [2018-04-11 11:26:16,636 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-11 11:26:16,638 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. [2018-04-11 11:26:16,638 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-04-11 11:26:16,658 INFO L700 Elim1Store]: detected not equals via solver [2018-04-11 11:26:16,658 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 [2018-04-11 11:26:16,658 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-11 11:26:16,659 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. [2018-04-11 11:26:16,659 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-04-11 11:26:16,675 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 [2018-04-11 11:26:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-04-11 11:26:16,696 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-04-11 11:26:16,696 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2018-04-11 11:26:16,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-04-11 11:26:16,697 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-04-11 11:26:16,697 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=40, Unknown=1, NotChecked=12, Total=72 [2018-04-11 11:26:16,697 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 9 states. [2018-04-11 11:26:16,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:16,853 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-04-11 11:26:16,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-04-11 11:26:16,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2018-04-11 11:26:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:16,854 INFO L225 Difference]: With dead ends: 109 [2018-04-11 11:26:16,854 INFO L226 Difference]: Without dead ends: 68 [2018-04-11 11:26:16,855 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 [2018-04-11 11:26:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-04-11 11:26:16,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2018-04-11 11:26:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-04-11 11:26:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2018-04-11 11:26:16,858 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 45 [2018-04-11 11:26:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:16,858 INFO L459 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2018-04-11 11:26:16,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-04-11 11:26:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2018-04-11 11:26:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-04-11 11:26:16,859 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:16,859 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] [2018-04-11 11:26:16,859 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]=== [2018-04-11 11:26:16,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1293117989, now seen corresponding path program 2 times [2018-04-11 11:26:16,860 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:16,860 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:16,860 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:16,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 11:26:16,860 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:16,871 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-04-11 11:26:16,998 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 11:26:16,998 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 [2018-04-11 11:26:17,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 11:26:17,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 11:26:17,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 11:26:17,033 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 11:26:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-04-11 11:26:17,095 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-04-11 11:26:17,095 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2018-04-11 11:26:17,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-04-11 11:26:17,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-04-11 11:26:17,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-04-11 11:26:17,096 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 14 states. [2018-04-11 11:26:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:17,279 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-04-11 11:26:17,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-04-11 11:26:17,279 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2018-04-11 11:26:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:17,279 INFO L225 Difference]: With dead ends: 70 [2018-04-11 11:26:17,279 INFO L226 Difference]: Without dead ends: 64 [2018-04-11 11:26:17,280 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2018-04-11 11:26:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-04-11 11:26:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2018-04-11 11:26:17,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-04-11 11:26:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-04-11 11:26:17,281 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 47 [2018-04-11 11:26:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:17,282 INFO L459 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-04-11 11:26:17,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-04-11 11:26:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-04-11 11:26:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-04-11 11:26:17,282 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 11:26:17,282 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] [2018-04-11 11:26:17,283 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]=== [2018-04-11 11:26:17,283 INFO L82 PathProgramCache]: Analyzing trace with hash -183198525, now seen corresponding path program 3 times [2018-04-11 11:26:17,283 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 11:26:17,283 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 11:26:17,283 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:17,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 11:26:17,283 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 11:26:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 11:26:17,291 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 11:26:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-04-11 11:26:17,366 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 11:26:17,366 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 [2018-04-11 11:26:17,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 11:26:17,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-04-11 11:26:17,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 11:26:17,393 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 11:26:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-04-11 11:26:17,415 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 11:26:17,415 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2018-04-11 11:26:17,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-11 11:26:17,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-11 11:26:17,416 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-04-11 11:26:17,416 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 7 states. [2018-04-11 11:26:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 11:26:17,451 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-04-11 11:26:17,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-11 11:26:17,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2018-04-11 11:26:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 11:26:17,452 INFO L225 Difference]: With dead ends: 59 [2018-04-11 11:26:17,452 INFO L226 Difference]: Without dead ends: 0 [2018-04-11 11:26:17,453 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 [2018-04-11 11:26:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-04-11 11:26:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-04-11 11:26:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-04-11 11:26:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-04-11 11:26:17,453 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2018-04-11 11:26:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 11:26:17,454 INFO L459 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-04-11 11:26:17,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-11 11:26:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-04-11 11:26:17,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-04-11 11:26:17,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.04 11:26:17 BoogieIcfgContainer [2018-04-11 11:26:17,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-04-11 11:26:17,458 INFO L168 Benchmark]: Toolchain (without parser) took 3430.68 ms. Allocated memory was 403.7 MB in the beginning and 612.9 MB in the end (delta: 209.2 MB). Free memory was 342.9 MB in the beginning and 529.5 MB in the end (delta: -186.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 5.3 GB. [2018-04-11 11:26:17,459 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 403.7 MB. Free memory is still 361.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-04-11 11:26:17,459 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.82 ms. Allocated memory is still 403.7 MB. Free memory was 342.9 MB in the beginning and 332.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 5.3 GB. [2018-04-11 11:26:17,459 INFO L168 Benchmark]: Boogie Preprocessor took 26.83 ms. Allocated memory is still 403.7 MB. Free memory was 332.2 MB in the beginning and 329.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-04-11 11:26:17,459 INFO L168 Benchmark]: RCFGBuilder took 269.74 ms. Allocated memory was 403.7 MB in the beginning and 585.6 MB in the end (delta: 181.9 MB). Free memory was 329.6 MB in the beginning and 548.1 MB in the end (delta: -218.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 5.3 GB. [2018-04-11 11:26:17,459 INFO L168 Benchmark]: TraceAbstraction took 2935.22 ms. Allocated memory was 585.6 MB in the beginning and 612.9 MB in the end (delta: 27.3 MB). Free memory was 548.1 MB in the beginning and 529.5 MB in the end (delta: 18.6 MB). Peak memory consumption was 45.9 MB. Max. memory is 5.3 GB. [2018-04-11 11:26:17,460 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 403.7 MB. Free memory is still 361.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 195.82 ms. Allocated memory is still 403.7 MB. Free memory was 342.9 MB in the beginning and 332.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.83 ms. Allocated memory is still 403.7 MB. Free memory was 332.2 MB in the beginning and 329.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 269.74 ms. Allocated memory was 403.7 MB in the beginning and 585.6 MB in the end (delta: 181.9 MB). Free memory was 329.6 MB in the beginning and 548.1 MB in the end (delta: -218.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2935.22 ms. Allocated memory was 585.6 MB in the beginning and 612.9 MB in the end (delta: 27.3 MB). Free memory was 548.1 MB in the beginning and 529.5 MB in the end (delta: 18.6 MB). Peak memory consumption was 45.9 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, 2.8s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 431 SDtfs, 672 SDslu, 878 SDs, 0 SdLazy, 831 SolverSat, 127 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 335 GetRequests, 242 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s 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, 1.0s 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-0-2018-04-11_11-26-17-466.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-0-2018-04-11_11-26-17-466.csv Received shutdown request...