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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_true-valid-memsafety.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4cf2d92 [2018-03-28 13:14:13,198 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-03-28 13:14:13,199 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-03-28 13:14:13,214 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-03-28 13:14:13,215 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-03-28 13:14:13,216 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-03-28 13:14:13,217 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-03-28 13:14:13,219 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-03-28 13:14:13,222 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-03-28 13:14:13,223 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-03-28 13:14:13,224 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-03-28 13:14:13,224 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-03-28 13:14:13,225 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-03-28 13:14:13,227 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-03-28 13:14:13,228 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-03-28 13:14:13,230 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-03-28 13:14:13,232 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-03-28 13:14:13,234 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-03-28 13:14:13,235 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-03-28 13:14:13,237 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-03-28 13:14:13,239 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-03-28 13:14:13,240 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-03-28 13:14:13,240 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-03-28 13:14:13,241 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-03-28 13:14:13,242 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-03-28 13:14:13,244 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-03-28 13:14:13,244 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-03-28 13:14:13,245 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-03-28 13:14:13,246 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-03-28 13:14:13,246 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-03-28 13:14:13,247 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-03-28 13:14:13,247 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf [2018-03-28 13:14:13,273 INFO L110 SettingsManager]: Loading preferences was successful [2018-03-28 13:14:13,273 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-03-28 13:14:13,274 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-03-28 13:14:13,274 INFO L133 SettingsManager]: * ultimate.logging.details=de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation=DEBUG; [2018-03-28 13:14:13,275 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-03-28 13:14:13,275 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-03-28 13:14:13,275 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-03-28 13:14:13,275 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-03-28 13:14:13,276 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-03-28 13:14:13,276 INFO L131 SettingsManager]: Preferences of LTL2Aut differ from their defaults: [2018-03-28 13:14:13,276 INFO L133 SettingsManager]: * Property to check=[] a a: x > 42 [2018-03-28 13:14:13,276 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-03-28 13:14:13,277 INFO L133 SettingsManager]: * sizeof long=4 [2018-03-28 13:14:13,277 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-03-28 13:14:13,277 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-03-28 13:14:13,277 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-03-28 13:14:13,277 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-03-28 13:14:13,278 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-03-28 13:14:13,278 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-03-28 13:14:13,278 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-03-28 13:14:13,278 INFO L133 SettingsManager]: * sizeof long double=12 [2018-03-28 13:14:13,278 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-03-28 13:14:13,278 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-03-28 13:14:13,279 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-03-28 13:14:13,279 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-03-28 13:14:13,279 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-03-28 13:14:13,279 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-03-28 13:14:13,279 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-03-28 13:14:13,280 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-03-28 13:14:13,280 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-03-28 13:14:13,280 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-03-28 13:14:13,280 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:13,280 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-03-28 13:14:13,281 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-03-28 13:14:13,281 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-03-28 13:14:13,282 INFO L131 SettingsManager]: Preferences of Boogie Printer differ from their defaults: [2018-03-28 13:14:13,282 INFO L133 SettingsManager]: * Dump path:=C:\Users\alex\AppData\Local\Temp\ [2018-03-28 13:14:13,319 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-03-28 13:14:13,334 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-03-28 13:14:13,339 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-03-28 13:14:13,341 INFO L271 PluginConnector]: Initializing CDTParser... [2018-03-28 13:14:13,342 INFO L276 PluginConnector]: CDTParser initialized [2018-03-28 13:14:13,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_true-valid-memsafety.c [2018-03-28 13:14:13,688 INFO L228 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGf3037e0d4 [2018-03-28 13:14:13,809 INFO L291 CDTParser]: IsIndexed: true [2018-03-28 13:14:13,809 INFO L292 CDTParser]: Found 1 translation units. [2018-03-28 13:14:13,809 INFO L171 CDTParser]: Scanning ArraysOfVariableLength_true-valid-memsafety.c [2018-03-28 13:14:13,810 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-03-28 13:14:13,810 INFO L215 ultiparseSymbolTable]: [2018-03-28 13:14:13,810 INFO L218 ultiparseSymbolTable]: Function table: [2018-03-28 13:14:13,811 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in ArraysOfVariableLength_true-valid-memsafety.c [2018-03-28 13:14:13,811 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo ('foo') in ArraysOfVariableLength_true-valid-memsafety.c [2018-03-28 13:14:13,811 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-03-28 13:14:13,811 INFO L233 ultiparseSymbolTable]: [2018-03-28 13:14:13,827 INFO L334 CDTParser]: Deleted temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGf3037e0d4 [2018-03-28 13:14:13,831 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-03-28 13:14:13,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-03-28 13:14:13,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-03-28 13:14:13,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-03-28 13:14:13,842 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-03-28 13:14:13,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.03 01:14:13" (1/1) ... [2018-03-28 13:14:13,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20984402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:13, skipping insertion in model container [2018-03-28 13:14:13,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.03 01:14:13" (1/1) ... [2018-03-28 13:14:13,860 INFO L167 Dispatcher]: Using SV-COMP mode [2018-03-28 13:14:13,873 INFO L167 Dispatcher]: Using SV-COMP mode [2018-03-28 13:14:14,012 INFO L175 PostProcessor]: Settings: Checked method=main [2018-03-28 13:14:14,037 INFO L175 PostProcessor]: Settings: Checked method=main [2018-03-28 13:14:14,041 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 9 non ball SCCs. Number of states in SCCs 9. [2018-03-28 13:14:14,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14 WrapperNode [2018-03-28 13:14:14,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-03-28 13:14:14,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-03-28 13:14:14,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-03-28 13:14:14,054 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-03-28 13:14:14,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14" (1/1) ... [2018-03-28 13:14:14,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14" (1/1) ... [2018-03-28 13:14:14,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14" (1/1) ... [2018-03-28 13:14:14,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14" (1/1) ... [2018-03-28 13:14:14,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14" (1/1) ... [2018-03-28 13:14:14,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14" (1/1) ... [2018-03-28 13:14:14,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14" (1/1) ... [2018-03-28 13:14:14,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-03-28 13:14:14,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-03-28 13:14:14,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-03-28 13:14:14,090 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-03-28 13:14:14,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14" (1/1) ... No working directory specified, using /storage/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 [2018-03-28 13:14:14,155 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-03-28 13:14:14,155 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-03-28 13:14:14,156 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo [2018-03-28 13:14:14,156 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-03-28 13:14:14,156 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo [2018-03-28 13:14:14,156 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-03-28 13:14:14,156 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-03-28 13:14:14,156 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-03-28 13:14:14,157 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-03-28 13:14:14,157 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-03-28 13:14:14,157 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-03-28 13:14:14,157 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-03-28 13:14:14,157 INFO L128 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-03-28 13:14:14,449 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-03-28 13:14:14,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.03 01:14:14 BoogieIcfgContainer [2018-03-28 13:14:14,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-03-28 13:14:14,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-03-28 13:14:14,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-03-28 13:14:14,454 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-03-28 13:14:14,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.03 01:14:13" (1/3) ... [2018-03-28 13:14:14,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620909f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.03 01:14:14, skipping insertion in model container [2018-03-28 13:14:14,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:14:14" (2/3) ... [2018-03-28 13:14:14,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620909f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.03 01:14:14, skipping insertion in model container [2018-03-28 13:14:14,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.03 01:14:14" (3/3) ... [2018-03-28 13:14:14,458 INFO L107 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_true-valid-memsafety.c [2018-03-28 13:14:14,468 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-03-28 13:14:14,478 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-03-28 13:14:14,517 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-03-28 13:14:14,518 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-03-28 13:14:14,518 INFO L370 AbstractCegarLoop]: Hoare is true [2018-03-28 13:14:14,518 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-03-28 13:14:14,518 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-03-28 13:14:14,518 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-03-28 13:14:14,518 INFO L374 AbstractCegarLoop]: Difference is false [2018-03-28 13:14:14,518 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-03-28 13:14:14,519 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-03-28 13:14:14,519 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-03-28 13:14:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-03-28 13:14:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-03-28 13:14:14,543 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:14,544 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:14,544 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]=== [2018-03-28 13:14:14,549 INFO L82 PathProgramCache]: Analyzing trace with hash -338374626, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:14,561 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:14,600 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:14,617 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:14,658 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:14:14,658 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2018-03-28 13:14:14,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-03-28 13:14:14,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-03-28 13:14:14,671 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-03-28 13:14:14,673 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-03-28 13:14:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:14,694 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2018-03-28 13:14:14,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-03-28 13:14:14,696 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-03-28 13:14:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:14,703 INFO L225 Difference]: With dead ends: 119 [2018-03-28 13:14:14,703 INFO L226 Difference]: Without dead ends: 61 [2018-03-28 13:14:14,706 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-03-28 13:14:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-03-28 13:14:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-03-28 13:14:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-03-28 13:14:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2018-03-28 13:14:14,741 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 14 [2018-03-28 13:14:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:14,742 INFO L459 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2018-03-28 13:14:14,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-03-28 13:14:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2018-03-28 13:14:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-03-28 13:14:14,743 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:14,743 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:14,743 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]=== [2018-03-28 13:14:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1893692590, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:14,762 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:14,783 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:14,807 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:14,862 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:14:14,862 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-03-28 13:14:14,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-03-28 13:14:14,863 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-03-28 13:14:14,864 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-28 13:14:14,864 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 4 states. [2018-03-28 13:14:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:14,992 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2018-03-28 13:14:14,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-03-28 13:14:14,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-03-28 13:14:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:14,997 INFO L225 Difference]: With dead ends: 108 [2018-03-28 13:14:14,997 INFO L226 Difference]: Without dead ends: 88 [2018-03-28 13:14:14,998 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-28 13:14:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-03-28 13:14:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2018-03-28 13:14:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-03-28 13:14:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2018-03-28 13:14:15,013 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 15 [2018-03-28 13:14:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:15,013 INFO L459 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2018-03-28 13:14:15,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-03-28 13:14:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2018-03-28 13:14:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-03-28 13:14:15,015 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:15,015 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:15,015 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]=== [2018-03-28 13:14:15,015 INFO L82 PathProgramCache]: Analyzing trace with hash 217610606, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:15,029 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:15,051 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:15,215 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:15,280 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:14:15,280 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2018-03-28 13:14:15,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-03-28 13:14:15,281 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-03-28 13:14:15,281 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-03-28 13:14:15,281 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 7 states. [2018-03-28 13:14:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:15,415 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2018-03-28 13:14:15,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-03-28 13:14:15,416 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-03-28 13:14:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:15,417 INFO L225 Difference]: With dead ends: 151 [2018-03-28 13:14:15,418 INFO L226 Difference]: Without dead ends: 97 [2018-03-28 13:14:15,419 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-03-28 13:14:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-03-28 13:14:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2018-03-28 13:14:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-03-28 13:14:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2018-03-28 13:14:15,429 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 21 [2018-03-28 13:14:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:15,429 INFO L459 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2018-03-28 13:14:15,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-03-28 13:14:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2018-03-28 13:14:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-03-28 13:14:15,430 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:15,430 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:15,431 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]=== [2018-03-28 13:14:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2108346150, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:15,441 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:15,464 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:15,486 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 [2018-03-28 13:14:15,488 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:15,490 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:15,490 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-03-28 13:14:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:15,525 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:15,573 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:14:15,573 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 3 [2018-03-28 13:14:15,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-03-28 13:14:15,574 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-03-28 13:14:15,574 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-28 13:14:15,575 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 4 states. [2018-03-28 13:14:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:15,621 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2018-03-28 13:14:15,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-03-28 13:14:15,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-03-28 13:14:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:15,624 INFO L225 Difference]: With dead ends: 77 [2018-03-28 13:14:15,625 INFO L226 Difference]: Without dead ends: 75 [2018-03-28 13:14:15,625 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-28 13:14:15,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-03-28 13:14:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-03-28 13:14:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-03-28 13:14:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2018-03-28 13:14:15,633 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 25 [2018-03-28 13:14:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:15,633 INFO L459 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2018-03-28 13:14:15,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-03-28 13:14:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2018-03-28 13:14:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-03-28 13:14:15,634 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:15,634 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:15,634 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]=== [2018-03-28 13:14:15,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2108346151, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:15,644 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:15,661 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:15,679 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 [2018-03-28 13:14:15,679 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:15,717 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:15,718 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:14:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:15,808 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:15,959 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:14:15,960 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2018-03-28 13:14:15,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-03-28 13:14:15,960 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-03-28 13:14:15,960 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-03-28 13:14:15,961 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 9 states. [2018-03-28 13:14:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:16,058 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-03-28 13:14:16,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-03-28 13:14:16,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-03-28 13:14:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:16,060 INFO L225 Difference]: With dead ends: 80 [2018-03-28 13:14:16,060 INFO L226 Difference]: Without dead ends: 78 [2018-03-28 13:14:16,060 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-03-28 13:14:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-03-28 13:14:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-03-28 13:14:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-03-28 13:14:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2018-03-28 13:14:16,070 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 25 [2018-03-28 13:14:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:16,070 INFO L459 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2018-03-28 13:14:16,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-03-28 13:14:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2018-03-28 13:14:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-03-28 13:14:16,072 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:16,072 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:16,072 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]=== [2018-03-28 13:14:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1601375567, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:16,078 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:16,095 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:16,125 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:16,207 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:14:16,207 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2018-03-28 13:14:16,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-03-28 13:14:16,208 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-03-28 13:14:16,208 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-03-28 13:14:16,208 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 9 states. [2018-03-28 13:14:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:16,450 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2018-03-28 13:14:16,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-28 13:14:16,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2018-03-28 13:14:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:16,451 INFO L225 Difference]: With dead ends: 107 [2018-03-28 13:14:16,452 INFO L226 Difference]: Without dead ends: 106 [2018-03-28 13:14:16,452 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-03-28 13:14:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-03-28 13:14:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2018-03-28 13:14:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-03-28 13:14:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2018-03-28 13:14:16,463 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 41 [2018-03-28 13:14:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:16,463 INFO L459 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2018-03-28 13:14:16,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-03-28 13:14:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2018-03-28 13:14:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-03-28 13:14:16,465 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:16,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:16,465 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]=== [2018-03-28 13:14:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1896965090, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:16,479 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:16,498 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:16,501 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 [2018-03-28 13:14:16,502 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:16,504 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:16,504 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-03-28 13:14:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-28 13:14:16,551 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-28 13:14:16,588 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:14:16,588 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2018-03-28 13:14:16,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-03-28 13:14:16,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-03-28 13:14:16,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-03-28 13:14:16,590 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 6 states. [2018-03-28 13:14:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:16,629 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-03-28 13:14:16,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-03-28 13:14:16,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2018-03-28 13:14:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:16,630 INFO L225 Difference]: With dead ends: 81 [2018-03-28 13:14:16,631 INFO L226 Difference]: Without dead ends: 80 [2018-03-28 13:14:16,631 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-03-28 13:14:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-03-28 13:14:16,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-03-28 13:14:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-03-28 13:14:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2018-03-28 13:14:16,640 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 42 [2018-03-28 13:14:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:16,640 INFO L459 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2018-03-28 13:14:16,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-03-28 13:14:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2018-03-28 13:14:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-03-28 13:14:16,642 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:16,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:16,642 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]=== [2018-03-28 13:14:16,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1896965091, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:16,649 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:16,669 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:16,673 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 [2018-03-28 13:14:16,673 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:16,676 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:16,677 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:14:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-28 13:14:16,726 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-28 13:14:16,798 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:14:16,798 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2018-03-28 13:14:16,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-03-28 13:14:16,799 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-03-28 13:14:16,799 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-03-28 13:14:16,799 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 11 states. [2018-03-28 13:14:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:16,910 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-03-28 13:14:16,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-03-28 13:14:16,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2018-03-28 13:14:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:16,912 INFO L225 Difference]: With dead ends: 89 [2018-03-28 13:14:16,912 INFO L226 Difference]: Without dead ends: 88 [2018-03-28 13:14:16,913 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-03-28 13:14:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-03-28 13:14:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2018-03-28 13:14:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-03-28 13:14:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2018-03-28 13:14:16,920 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 42 [2018-03-28 13:14:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:16,920 INFO L459 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2018-03-28 13:14:16,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-03-28 13:14:16,920 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2018-03-28 13:14:16,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-03-28 13:14:16,921 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:16,922 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:16,922 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]=== [2018-03-28 13:14:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 80690624, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:16,932 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:16,949 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:16,969 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:17,017 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:17,017 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-03-28 13:14:17,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-03-28 13:14:17,018 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-03-28 13:14:17,018 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-03-28 13:14:17,018 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 8 states. [2018-03-28 13:14:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:17,111 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-03-28 13:14:17,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-28 13:14:17,112 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2018-03-28 13:14:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:17,113 INFO L225 Difference]: With dead ends: 131 [2018-03-28 13:14:17,113 INFO L226 Difference]: Without dead ends: 109 [2018-03-28 13:14:17,113 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-03-28 13:14:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-03-28 13:14:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2018-03-28 13:14:17,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-03-28 13:14:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2018-03-28 13:14:17,123 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 41 [2018-03-28 13:14:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:17,123 INFO L459 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2018-03-28 13:14:17,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-03-28 13:14:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2018-03-28 13:14:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-03-28 13:14:17,126 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:17,126 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2018-03-28 13:14:17,126 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]=== [2018-03-28 13:14:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash -737480982, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:17,138 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:17,164 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-28 13:14:17,227 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-28 13:14:17,346 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:14:17,347 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2018-03-28 13:14:17,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-03-28 13:14:17,348 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-03-28 13:14:17,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-03-28 13:14:17,348 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 10 states. [2018-03-28 13:14:17,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:17,467 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2018-03-28 13:14:17,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-03-28 13:14:17,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2018-03-28 13:14:17,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:17,468 INFO L225 Difference]: With dead ends: 179 [2018-03-28 13:14:17,468 INFO L226 Difference]: Without dead ends: 112 [2018-03-28 13:14:17,469 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-03-28 13:14:17,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-03-28 13:14:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 96. [2018-03-28 13:14:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-03-28 13:14:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2018-03-28 13:14:17,476 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 45 [2018-03-28 13:14:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:17,476 INFO L459 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2018-03-28 13:14:17,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-03-28 13:14:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2018-03-28 13:14:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-03-28 13:14:17,477 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:17,477 INFO L355 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:17,477 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]=== [2018-03-28 13:14:17,478 INFO L82 PathProgramCache]: Analyzing trace with hash 335887572, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:17,484 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:17,502 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:17,554 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:14:17,625 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:17,625 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-03-28 13:14:17,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-03-28 13:14:17,626 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-03-28 13:14:17,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-03-28 13:14:17,626 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 13 states. [2018-03-28 13:14:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:17,821 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2018-03-28 13:14:17,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-03-28 13:14:17,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2018-03-28 13:14:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:17,823 INFO L225 Difference]: With dead ends: 191 [2018-03-28 13:14:17,823 INFO L226 Difference]: Without dead ends: 127 [2018-03-28 13:14:17,824 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2018-03-28 13:14:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-03-28 13:14:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2018-03-28 13:14:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-03-28 13:14:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2018-03-28 13:14:17,835 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 50 [2018-03-28 13:14:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:17,836 INFO L459 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2018-03-28 13:14:17,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-03-28 13:14:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2018-03-28 13:14:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-03-28 13:14:17,837 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:17,837 INFO L355 BasicCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1] [2018-03-28 13:14:17,837 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]=== [2018-03-28 13:14:17,838 INFO L82 PathProgramCache]: Analyzing trace with hash -532975731, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:17,847 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:17,867 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:17,870 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 [2018-03-28 13:14:17,870 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:17,874 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:17,874 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:14:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-03-28 13:14:17,992 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-03-28 13:14:18,125 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:18,125 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2018-03-28 13:14:18,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-03-28 13:14:18,126 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-03-28 13:14:18,126 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-03-28 13:14:18,126 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 11 states. [2018-03-28 13:14:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:18,304 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-03-28 13:14:18,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-03-28 13:14:18,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2018-03-28 13:14:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:18,305 INFO L225 Difference]: With dead ends: 128 [2018-03-28 13:14:18,305 INFO L226 Difference]: Without dead ends: 127 [2018-03-28 13:14:18,306 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-03-28 13:14:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-03-28 13:14:18,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2018-03-28 13:14:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-03-28 13:14:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2018-03-28 13:14:18,315 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 54 [2018-03-28 13:14:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:18,316 INFO L459 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2018-03-28 13:14:18,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-03-28 13:14:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2018-03-28 13:14:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-03-28 13:14:18,317 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:18,318 INFO L355 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:18,318 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]=== [2018-03-28 13:14:18,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833070, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:18,327 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:18,360 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-03-28 13:14:18,522 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-03-28 13:14:18,614 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:18,614 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2018-03-28 13:14:18,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-03-28 13:14:18,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-03-28 13:14:18,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-03-28 13:14:18,615 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 15 states. [2018-03-28 13:14:18,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:18,863 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2018-03-28 13:14:18,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-03-28 13:14:18,863 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2018-03-28 13:14:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:18,864 INFO L225 Difference]: With dead ends: 149 [2018-03-28 13:14:18,865 INFO L226 Difference]: Without dead ends: 148 [2018-03-28 13:14:18,866 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2018-03-28 13:14:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-03-28 13:14:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 127. [2018-03-28 13:14:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-03-28 13:14:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2018-03-28 13:14:18,877 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 79 [2018-03-28 13:14:18,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:18,878 INFO L459 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2018-03-28 13:14:18,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-03-28 13:14:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2018-03-28 13:14:18,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-03-28 13:14:18,879 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:18,880 INFO L355 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:18,880 INFO L408 AbstractCegarLoop]: === Iteration 14 === [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]=== [2018-03-28 13:14:18,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1006086918, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:18,889 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:18,919 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:18,931 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 [2018-03-28 13:14:18,931 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:18,934 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:18,934 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:14:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-03-28 13:14:19,010 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-03-28 13:14:19,134 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:19,134 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-03-28 13:14:19,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-03-28 13:14:19,135 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-03-28 13:14:19,135 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-03-28 13:14:19,135 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 15 states. [2018-03-28 13:14:19,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:19,405 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2018-03-28 13:14:19,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-03-28 13:14:19,405 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2018-03-28 13:14:19,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:19,407 INFO L225 Difference]: With dead ends: 145 [2018-03-28 13:14:19,407 INFO L226 Difference]: Without dead ends: 144 [2018-03-28 13:14:19,408 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2018-03-28 13:14:19,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-03-28 13:14:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2018-03-28 13:14:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-03-28 13:14:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2018-03-28 13:14:19,420 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 80 [2018-03-28 13:14:19,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:19,420 INFO L459 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2018-03-28 13:14:19,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-03-28 13:14:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2018-03-28 13:14:19,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-03-28 13:14:19,421 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:19,422 INFO L355 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:19,422 INFO L408 AbstractCegarLoop]: === Iteration 15 === [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]=== [2018-03-28 13:14:19,422 INFO L82 PathProgramCache]: Analyzing trace with hash -653283081, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:19,431 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:19,465 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-03-28 13:14:19,586 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-03-28 13:14:19,679 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:19,679 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-03-28 13:14:19,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-03-28 13:14:19,680 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-03-28 13:14:19,680 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-03-28 13:14:19,680 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand 19 states. [2018-03-28 13:14:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:19,939 INFO L93 Difference]: Finished difference Result 258 states and 273 transitions. [2018-03-28 13:14:19,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-28 13:14:19,939 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2018-03-28 13:14:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:19,940 INFO L225 Difference]: With dead ends: 258 [2018-03-28 13:14:19,940 INFO L226 Difference]: Without dead ends: 182 [2018-03-28 13:14:19,941 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 151 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2018-03-28 13:14:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-03-28 13:14:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2018-03-28 13:14:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-03-28 13:14:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 173 transitions. [2018-03-28 13:14:19,951 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 173 transitions. Word has length 88 [2018-03-28 13:14:19,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:19,951 INFO L459 AbstractCegarLoop]: Abstraction has 166 states and 173 transitions. [2018-03-28 13:14:19,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-03-28 13:14:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 173 transitions. [2018-03-28 13:14:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-03-28 13:14:19,952 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:19,952 INFO L355 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2018-03-28 13:14:19,952 INFO L408 AbstractCegarLoop]: === Iteration 16 === [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]=== [2018-03-28 13:14:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1151066240, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:19,958 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:19,988 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-03-28 13:14:20,076 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-03-28 13:14:20,193 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:20,193 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-03-28 13:14:20,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-28 13:14:20,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-28 13:14:20,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-03-28 13:14:20,194 INFO L87 Difference]: Start difference. First operand 166 states and 173 transitions. Second operand 16 states. [2018-03-28 13:14:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:20,448 INFO L93 Difference]: Finished difference Result 260 states and 272 transitions. [2018-03-28 13:14:20,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-03-28 13:14:20,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2018-03-28 13:14:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:20,535 INFO L225 Difference]: With dead ends: 260 [2018-03-28 13:14:20,535 INFO L226 Difference]: Without dead ends: 178 [2018-03-28 13:14:20,536 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 177 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2018-03-28 13:14:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-03-28 13:14:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2018-03-28 13:14:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-03-28 13:14:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 171 transitions. [2018-03-28 13:14:20,546 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 171 transitions. Word has length 99 [2018-03-28 13:14:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:20,547 INFO L459 AbstractCegarLoop]: Abstraction has 166 states and 171 transitions. [2018-03-28 13:14:20,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-28 13:14:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 171 transitions. [2018-03-28 13:14:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-03-28 13:14:20,548 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:20,549 INFO L355 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:20,549 INFO L408 AbstractCegarLoop]: === Iteration 17 === [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]=== [2018-03-28 13:14:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2046842569, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:20,558 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:20,592 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-03-28 13:14:20,629 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-03-28 13:14:20,715 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:20,715 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-03-28 13:14:20,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-28 13:14:20,716 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-28 13:14:20,716 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-03-28 13:14:20,716 INFO L87 Difference]: Start difference. First operand 166 states and 171 transitions. Second operand 16 states. [2018-03-28 13:14:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:20,872 INFO L93 Difference]: Finished difference Result 236 states and 248 transitions. [2018-03-28 13:14:20,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-28 13:14:20,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2018-03-28 13:14:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:20,874 INFO L225 Difference]: With dead ends: 236 [2018-03-28 13:14:20,874 INFO L226 Difference]: Without dead ends: 214 [2018-03-28 13:14:20,875 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2018-03-28 13:14:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-03-28 13:14:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 199. [2018-03-28 13:14:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-03-28 13:14:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 210 transitions. [2018-03-28 13:14:20,887 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 210 transitions. Word has length 108 [2018-03-28 13:14:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:20,888 INFO L459 AbstractCegarLoop]: Abstraction has 199 states and 210 transitions. [2018-03-28 13:14:20,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-28 13:14:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 210 transitions. [2018-03-28 13:14:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-03-28 13:14:20,889 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:20,889 INFO L355 BasicCegarLoop]: trace histogram [9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:20,889 INFO L408 AbstractCegarLoop]: === Iteration 18 === [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]=== [2018-03-28 13:14:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1908732634, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:20,899 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:20,945 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-03-28 13:14:21,062 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-03-28 13:14:21,187 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:21,187 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2018-03-28 13:14:21,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-03-28 13:14:21,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-03-28 13:14:21,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2018-03-28 13:14:21,188 INFO L87 Difference]: Start difference. First operand 199 states and 210 transitions. Second operand 21 states. [2018-03-28 13:14:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:21,581 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2018-03-28 13:14:21,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-28 13:14:21,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 126 [2018-03-28 13:14:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:21,585 INFO L225 Difference]: With dead ends: 219 [2018-03-28 13:14:21,585 INFO L226 Difference]: Without dead ends: 218 [2018-03-28 13:14:21,585 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 224 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2018-03-28 13:14:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-03-28 13:14:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 199. [2018-03-28 13:14:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-03-28 13:14:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 209 transitions. [2018-03-28 13:14:21,596 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 209 transitions. Word has length 126 [2018-03-28 13:14:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:21,596 INFO L459 AbstractCegarLoop]: Abstraction has 199 states and 209 transitions. [2018-03-28 13:14:21,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-03-28 13:14:21,596 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 209 transitions. [2018-03-28 13:14:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-03-28 13:14:21,597 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:21,597 INFO L355 BasicCegarLoop]: trace histogram [9, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:21,597 INFO L408 AbstractCegarLoop]: === Iteration 19 === [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]=== [2018-03-28 13:14:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1266987667, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:21,605 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:21,642 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 138 proven. 13 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-03-28 13:14:21,750 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 138 proven. 13 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-03-28 13:14:21,950 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:21,950 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-03-28 13:14:21,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-03-28 13:14:21,951 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-03-28 13:14:21,951 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-03-28 13:14:21,951 INFO L87 Difference]: Start difference. First operand 199 states and 209 transitions. Second operand 22 states. [2018-03-28 13:14:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:22,278 INFO L93 Difference]: Finished difference Result 318 states and 339 transitions. [2018-03-28 13:14:22,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-03-28 13:14:22,279 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 130 [2018-03-28 13:14:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:22,280 INFO L225 Difference]: With dead ends: 318 [2018-03-28 13:14:22,280 INFO L226 Difference]: Without dead ends: 215 [2018-03-28 13:14:22,281 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 231 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2018-03-28 13:14:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-03-28 13:14:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 199. [2018-03-28 13:14:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-03-28 13:14:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 208 transitions. [2018-03-28 13:14:22,289 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 208 transitions. Word has length 130 [2018-03-28 13:14:22,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:22,289 INFO L459 AbstractCegarLoop]: Abstraction has 199 states and 208 transitions. [2018-03-28 13:14:22,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-03-28 13:14:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 208 transitions. [2018-03-28 13:14:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-03-28 13:14:22,290 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:22,290 INFO L355 BasicCegarLoop]: trace histogram [10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:22,290 INFO L408 AbstractCegarLoop]: === Iteration 20 === [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]=== [2018-03-28 13:14:22,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1099979467, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:22,303 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:22,336 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 168 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-03-28 13:14:22,436 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 168 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-03-28 13:14:22,579 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:22,580 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2018-03-28 13:14:22,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-03-28 13:14:22,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-03-28 13:14:22,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-03-28 13:14:22,581 INFO L87 Difference]: Start difference. First operand 199 states and 208 transitions. Second operand 25 states. [2018-03-28 13:14:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:23,006 INFO L93 Difference]: Finished difference Result 348 states and 365 transitions. [2018-03-28 13:14:23,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-03-28 13:14:23,006 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 135 [2018-03-28 13:14:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:23,008 INFO L225 Difference]: With dead ends: 348 [2018-03-28 13:14:23,008 INFO L226 Difference]: Without dead ends: 248 [2018-03-28 13:14:23,011 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 237 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2018-03-28 13:14:23,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-03-28 13:14:23,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 237. [2018-03-28 13:14:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-03-28 13:14:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 245 transitions. [2018-03-28 13:14:23,028 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 245 transitions. Word has length 135 [2018-03-28 13:14:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:23,029 INFO L459 AbstractCegarLoop]: Abstraction has 237 states and 245 transitions. [2018-03-28 13:14:23,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-03-28 13:14:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 245 transitions. [2018-03-28 13:14:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-03-28 13:14:23,030 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:23,030 INFO L355 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:23,030 INFO L408 AbstractCegarLoop]: === Iteration 21 === [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]=== [2018-03-28 13:14:23,030 INFO L82 PathProgramCache]: Analyzing trace with hash -158811644, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:23,043 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:23,091 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:23,095 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 [2018-03-28 13:14:23,095 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:23,099 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:23,100 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:14:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-03-28 13:14:23,344 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-03-28 13:14:23,588 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:23,588 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-03-28 13:14:23,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-03-28 13:14:23,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-03-28 13:14:23,589 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2018-03-28 13:14:23,590 INFO L87 Difference]: Start difference. First operand 237 states and 245 transitions. Second operand 19 states. [2018-03-28 13:14:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:24,176 INFO L93 Difference]: Finished difference Result 249 states and 259 transitions. [2018-03-28 13:14:24,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-03-28 13:14:24,176 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 139 [2018-03-28 13:14:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:24,177 INFO L225 Difference]: With dead ends: 249 [2018-03-28 13:14:24,177 INFO L226 Difference]: Without dead ends: 248 [2018-03-28 13:14:24,178 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 253 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2018-03-28 13:14:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-03-28 13:14:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2018-03-28 13:14:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-03-28 13:14:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 246 transitions. [2018-03-28 13:14:24,194 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 246 transitions. Word has length 139 [2018-03-28 13:14:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:24,195 INFO L459 AbstractCegarLoop]: Abstraction has 240 states and 246 transitions. [2018-03-28 13:14:24,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-03-28 13:14:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 246 transitions. [2018-03-28 13:14:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-03-28 13:14:24,196 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:24,197 INFO L355 BasicCegarLoop]: trace histogram [14, 10, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:24,197 INFO L408 AbstractCegarLoop]: === Iteration 22 === [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]=== [2018-03-28 13:14:24,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1773837943, now seen corresponding path program 6 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:24,204 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:24,242 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 302 proven. 36 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-03-28 13:14:24,383 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 302 proven. 36 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-03-28 13:14:24,565 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:24,565 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2018-03-28 13:14:24,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-03-28 13:14:24,566 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-03-28 13:14:24,566 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2018-03-28 13:14:24,567 INFO L87 Difference]: Start difference. First operand 240 states and 246 transitions. Second operand 27 states. [2018-03-28 13:14:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:25,091 INFO L93 Difference]: Finished difference Result 270 states and 279 transitions. [2018-03-28 13:14:25,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-03-28 13:14:25,091 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 182 [2018-03-28 13:14:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:25,093 INFO L225 Difference]: With dead ends: 270 [2018-03-28 13:14:25,093 INFO L226 Difference]: Without dead ends: 269 [2018-03-28 13:14:25,094 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 329 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2018-03-28 13:14:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-03-28 13:14:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 248. [2018-03-28 13:14:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-03-28 13:14:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 255 transitions. [2018-03-28 13:14:25,113 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 255 transitions. Word has length 182 [2018-03-28 13:14:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:25,114 INFO L459 AbstractCegarLoop]: Abstraction has 248 states and 255 transitions. [2018-03-28 13:14:25,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-03-28 13:14:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 255 transitions. [2018-03-28 13:14:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-03-28 13:14:25,116 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:25,116 INFO L355 BasicCegarLoop]: trace histogram [14, 10, 10, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:25,116 INFO L408 AbstractCegarLoop]: === Iteration 23 === [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]=== [2018-03-28 13:14:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash -845598499, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:25,129 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:25,183 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:25,189 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 [2018-03-28 13:14:25,190 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:25,193 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:25,194 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:14:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 242 proven. 39 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-03-28 13:14:25,513 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 242 proven. 39 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-03-28 13:14:25,774 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:25,774 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-03-28 13:14:25,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-03-28 13:14:25,775 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-03-28 13:14:25,775 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2018-03-28 13:14:25,775 INFO L87 Difference]: Start difference. First operand 248 states and 255 transitions. Second operand 23 states. [2018-03-28 13:14:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:26,511 INFO L93 Difference]: Finished difference Result 292 states and 317 transitions. [2018-03-28 13:14:26,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-03-28 13:14:26,511 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 183 [2018-03-28 13:14:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:26,513 INFO L225 Difference]: With dead ends: 292 [2018-03-28 13:14:26,514 INFO L226 Difference]: Without dead ends: 291 [2018-03-28 13:14:26,515 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=462, Invalid=1344, Unknown=0, NotChecked=0, Total=1806 [2018-03-28 13:14:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-03-28 13:14:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 276. [2018-03-28 13:14:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-03-28 13:14:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 289 transitions. [2018-03-28 13:14:26,534 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 289 transitions. Word has length 183 [2018-03-28 13:14:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:26,535 INFO L459 AbstractCegarLoop]: Abstraction has 276 states and 289 transitions. [2018-03-28 13:14:26,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-03-28 13:14:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 289 transitions. [2018-03-28 13:14:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-03-28 13:14:26,537 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:26,537 INFO L355 BasicCegarLoop]: trace histogram [15, 11, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:26,537 INFO L408 AbstractCegarLoop]: === Iteration 24 === [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]=== [2018-03-28 13:14:26,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1289056206, now seen corresponding path program 7 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:26,544 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:26,585 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 364 proven. 66 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-03-28 13:14:26,730 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 364 proven. 66 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-03-28 13:14:26,914 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:26,914 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2018-03-28 13:14:26,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-03-28 13:14:26,915 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-03-28 13:14:26,915 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2018-03-28 13:14:26,915 INFO L87 Difference]: Start difference. First operand 276 states and 289 transitions. Second operand 31 states. [2018-03-28 13:14:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:27,472 INFO L93 Difference]: Finished difference Result 466 states and 493 transitions. [2018-03-28 13:14:27,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-03-28 13:14:27,472 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 191 [2018-03-28 13:14:27,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:27,473 INFO L225 Difference]: With dead ends: 466 [2018-03-28 13:14:27,473 INFO L226 Difference]: Without dead ends: 336 [2018-03-28 13:14:27,475 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 341 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2018-03-28 13:14:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-03-28 13:14:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 323. [2018-03-28 13:14:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-03-28 13:14:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 336 transitions. [2018-03-28 13:14:27,488 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 336 transitions. Word has length 191 [2018-03-28 13:14:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:27,488 INFO L459 AbstractCegarLoop]: Abstraction has 323 states and 336 transitions. [2018-03-28 13:14:27,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-03-28 13:14:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 336 transitions. [2018-03-28 13:14:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-03-28 13:14:27,489 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:27,490 INFO L355 BasicCegarLoop]: trace histogram [19, 14, 13, 13, 13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:27,490 INFO L408 AbstractCegarLoop]: === Iteration 25 === [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]=== [2018-03-28 13:14:27,490 INFO L82 PathProgramCache]: Analyzing trace with hash -321863814, now seen corresponding path program 8 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:27,503 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:27,564 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 766 proven. 33 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-03-28 13:14:27,710 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 766 proven. 33 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-03-28 13:14:27,947 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:27,948 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2018-03-28 13:14:27,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-03-28 13:14:27,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-03-28 13:14:27,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2018-03-28 13:14:27,949 INFO L87 Difference]: Start difference. First operand 323 states and 336 transitions. Second operand 28 states. [2018-03-28 13:14:28,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:28,303 INFO L93 Difference]: Finished difference Result 471 states and 497 transitions. [2018-03-28 13:14:28,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-03-28 13:14:28,304 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 238 [2018-03-28 13:14:28,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:28,306 INFO L225 Difference]: With dead ends: 471 [2018-03-28 13:14:28,307 INFO L226 Difference]: Without dead ends: 335 [2018-03-28 13:14:28,308 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 439 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2018-03-28 13:14:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-03-28 13:14:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 323. [2018-03-28 13:14:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-03-28 13:14:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 334 transitions. [2018-03-28 13:14:28,328 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 334 transitions. Word has length 238 [2018-03-28 13:14:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:28,329 INFO L459 AbstractCegarLoop]: Abstraction has 323 states and 334 transitions. [2018-03-28 13:14:28,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-03-28 13:14:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 334 transitions. [2018-03-28 13:14:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-03-28 13:14:28,331 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:28,331 INFO L355 BasicCegarLoop]: trace histogram [20, 15, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:28,331 INFO L408 AbstractCegarLoop]: === Iteration 26 === [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]=== [2018-03-28 13:14:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1519624145, now seen corresponding path program 9 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:28,340 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:28,422 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 575 proven. 66 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-03-28 13:14:28,923 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 575 proven. 66 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-03-28 13:14:29,559 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:29,560 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 32 [2018-03-28 13:14:29,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-03-28 13:14:29,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-03-28 13:14:29,561 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2018-03-28 13:14:29,561 INFO L87 Difference]: Start difference. First operand 323 states and 334 transitions. Second operand 33 states. [2018-03-28 13:14:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:30,210 INFO L93 Difference]: Finished difference Result 339 states and 350 transitions. [2018-03-28 13:14:30,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-03-28 13:14:30,210 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 247 [2018-03-28 13:14:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:30,212 INFO L225 Difference]: With dead ends: 339 [2018-03-28 13:14:30,212 INFO L226 Difference]: Without dead ends: 338 [2018-03-28 13:14:30,214 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 450 SyntacticMatches, 13 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=409, Invalid=2783, Unknown=0, NotChecked=0, Total=3192 [2018-03-28 13:14:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-03-28 13:14:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 323. [2018-03-28 13:14:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-03-28 13:14:30,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 333 transitions. [2018-03-28 13:14:30,234 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 333 transitions. Word has length 247 [2018-03-28 13:14:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:30,234 INFO L459 AbstractCegarLoop]: Abstraction has 323 states and 333 transitions. [2018-03-28 13:14:30,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-03-28 13:14:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 333 transitions. [2018-03-28 13:14:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-03-28 13:14:30,236 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:30,237 INFO L355 BasicCegarLoop]: trace histogram [21, 16, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:30,237 INFO L408 AbstractCegarLoop]: === Iteration 27 === [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]=== [2018-03-28 13:14:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1801409460, now seen corresponding path program 10 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:30,246 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:30,301 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 675 proven. 105 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-03-28 13:14:30,543 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 675 proven. 105 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-03-28 13:14:30,938 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:30,938 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 37 [2018-03-28 13:14:30,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-03-28 13:14:30,939 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-03-28 13:14:30,939 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-03-28 13:14:30,940 INFO L87 Difference]: Start difference. First operand 323 states and 333 transitions. Second operand 37 states. [2018-03-28 13:14:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:31,576 INFO L93 Difference]: Finished difference Result 513 states and 534 transitions. [2018-03-28 13:14:31,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-03-28 13:14:31,576 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 256 [2018-03-28 13:14:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:31,578 INFO L225 Difference]: With dead ends: 513 [2018-03-28 13:14:31,578 INFO L226 Difference]: Without dead ends: 392 [2018-03-28 13:14:31,580 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 463 SyntacticMatches, 13 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=779, Invalid=3913, Unknown=0, NotChecked=0, Total=4692 [2018-03-28 13:14:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2018-03-28 13:14:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 379. [2018-03-28 13:14:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-03-28 13:14:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 389 transitions. [2018-03-28 13:14:31,594 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 389 transitions. Word has length 256 [2018-03-28 13:14:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:31,595 INFO L459 AbstractCegarLoop]: Abstraction has 379 states and 389 transitions. [2018-03-28 13:14:31,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-03-28 13:14:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 389 transitions. [2018-03-28 13:14:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-03-28 13:14:31,597 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:31,597 INFO L355 BasicCegarLoop]: trace histogram [26, 20, 19, 19, 19, 19, 19, 19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:31,598 INFO L408 AbstractCegarLoop]: === Iteration 28 === [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]=== [2018-03-28 13:14:31,598 INFO L82 PathProgramCache]: Analyzing trace with hash 762690577, now seen corresponding path program 11 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:31,605 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:31,673 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 1393 proven. 62 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2018-03-28 13:14:32,006 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 1393 proven. 62 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2018-03-28 13:14:32,487 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:32,488 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2018-03-28 13:14:32,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-03-28 13:14:32,488 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-03-28 13:14:32,489 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2018-03-28 13:14:32,489 INFO L87 Difference]: Start difference. First operand 379 states and 389 transitions. Second operand 34 states. [2018-03-28 13:14:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:33,020 INFO L93 Difference]: Finished difference Result 518 states and 537 transitions. [2018-03-28 13:14:33,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-03-28 13:14:33,020 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 312 [2018-03-28 13:14:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:33,022 INFO L225 Difference]: With dead ends: 518 [2018-03-28 13:14:33,022 INFO L226 Difference]: Without dead ends: 391 [2018-03-28 13:14:33,024 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 579 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=572, Invalid=2734, Unknown=0, NotChecked=0, Total=3306 [2018-03-28 13:14:33,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-03-28 13:14:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 379. [2018-03-28 13:14:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-03-28 13:14:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 387 transitions. [2018-03-28 13:14:33,046 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 387 transitions. Word has length 312 [2018-03-28 13:14:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:33,047 INFO L459 AbstractCegarLoop]: Abstraction has 379 states and 387 transitions. [2018-03-28 13:14:33,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-03-28 13:14:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 387 transitions. [2018-03-28 13:14:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-03-28 13:14:33,049 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:33,049 INFO L355 BasicCegarLoop]: trace histogram [27, 21, 20, 20, 20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:33,049 INFO L408 AbstractCegarLoop]: === Iteration 29 === [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]=== [2018-03-28 13:14:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1918770318, now seen corresponding path program 12 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:33,060 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:33,159 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2376 backedges. 981 proven. 105 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-03-28 13:14:33,449 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2376 backedges. 981 proven. 105 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-03-28 13:14:33,830 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:33,830 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 38 [2018-03-28 13:14:33,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-03-28 13:14:33,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-03-28 13:14:33,831 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2018-03-28 13:14:33,831 INFO L87 Difference]: Start difference. First operand 379 states and 387 transitions. Second operand 39 states. [2018-03-28 13:14:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:34,744 INFO L93 Difference]: Finished difference Result 395 states and 402 transitions. [2018-03-28 13:14:34,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-03-28 13:14:34,744 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 321 [2018-03-28 13:14:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:34,746 INFO L225 Difference]: With dead ends: 395 [2018-03-28 13:14:34,746 INFO L226 Difference]: Without dead ends: 394 [2018-03-28 13:14:34,747 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 590 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=544, Invalid=4012, Unknown=0, NotChecked=0, Total=4556 [2018-03-28 13:14:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-03-28 13:14:34,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 379. [2018-03-28 13:14:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-03-28 13:14:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 386 transitions. [2018-03-28 13:14:34,773 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 386 transitions. Word has length 321 [2018-03-28 13:14:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:34,774 INFO L459 AbstractCegarLoop]: Abstraction has 379 states and 386 transitions. [2018-03-28 13:14:34,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-03-28 13:14:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 386 transitions. [2018-03-28 13:14:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-03-28 13:14:34,776 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:34,777 INFO L355 BasicCegarLoop]: trace histogram [28, 22, 21, 21, 21, 21, 21, 21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:34,777 INFO L408 AbstractCegarLoop]: === Iteration 30 === [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]=== [2018-03-28 13:14:34,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1675156375, now seen corresponding path program 13 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:34,785 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:34,857 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2571 backedges. 1128 proven. 153 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-03-28 13:14:35,149 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2571 backedges. 1128 proven. 153 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-03-28 13:14:35,476 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:35,477 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 43 [2018-03-28 13:14:35,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-03-28 13:14:35,477 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-03-28 13:14:35,478 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2018-03-28 13:14:35,478 INFO L87 Difference]: Start difference. First operand 379 states and 386 transitions. Second operand 43 states. [2018-03-28 13:14:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:36,249 INFO L93 Difference]: Finished difference Result 572 states and 587 transitions. [2018-03-28 13:14:36,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-03-28 13:14:36,323 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 330 [2018-03-28 13:14:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:36,325 INFO L225 Difference]: With dead ends: 572 [2018-03-28 13:14:36,325 INFO L226 Difference]: Without dead ends: 460 [2018-03-28 13:14:36,327 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 603 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1044, Invalid=5436, Unknown=0, NotChecked=0, Total=6480 [2018-03-28 13:14:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2018-03-28 13:14:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 444. [2018-03-28 13:14:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-03-28 13:14:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 451 transitions. [2018-03-28 13:14:36,351 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 451 transitions. Word has length 330 [2018-03-28 13:14:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:36,352 INFO L459 AbstractCegarLoop]: Abstraction has 444 states and 451 transitions. [2018-03-28 13:14:36,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-03-28 13:14:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 451 transitions. [2018-03-28 13:14:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-03-28 13:14:36,354 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:36,355 INFO L355 BasicCegarLoop]: trace histogram [27, 20, 20, 20, 20, 20, 20, 20, 20, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:36,355 INFO L408 AbstractCegarLoop]: === Iteration 31 === [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]=== [2018-03-28 13:14:36,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1121709856, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:36,363 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:36,469 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1016 proven. 100 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2018-03-28 13:14:36,792 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1016 proven. 100 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2018-03-28 13:14:37,186 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:37,186 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 40 [2018-03-28 13:14:37,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-03-28 13:14:37,187 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-03-28 13:14:37,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-03-28 13:14:37,188 INFO L87 Difference]: Start difference. First operand 444 states and 451 transitions. Second operand 40 states. [2018-03-28 13:14:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:37,800 INFO L93 Difference]: Finished difference Result 574 states and 586 transitions. [2018-03-28 13:14:37,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-28 13:14:37,801 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 341 [2018-03-28 13:14:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:37,802 INFO L225 Difference]: With dead ends: 574 [2018-03-28 13:14:37,802 INFO L226 Difference]: Without dead ends: 456 [2018-03-28 13:14:37,804 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 629 SyntacticMatches, 15 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=3904, Unknown=0, NotChecked=0, Total=4692 [2018-03-28 13:14:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2018-03-28 13:14:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 444. [2018-03-28 13:14:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-03-28 13:14:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 449 transitions. [2018-03-28 13:14:37,829 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 449 transitions. Word has length 341 [2018-03-28 13:14:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:37,830 INFO L459 AbstractCegarLoop]: Abstraction has 444 states and 449 transitions. [2018-03-28 13:14:37,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-03-28 13:14:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 449 transitions. [2018-03-28 13:14:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-03-28 13:14:37,832 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:37,833 INFO L355 BasicCegarLoop]: trace histogram [28, 21, 21, 21, 21, 21, 21, 21, 21, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:37,833 INFO L408 AbstractCegarLoop]: === Iteration 32 === [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]=== [2018-03-28 13:14:37,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1104547479, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:37,845 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:37,944 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2618 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-03-28 13:14:38,093 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2618 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-03-28 13:14:38,345 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:38,345 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-03-28 13:14:38,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-03-28 13:14:38,346 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-03-28 13:14:38,346 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2018-03-28 13:14:38,346 INFO L87 Difference]: Start difference. First operand 444 states and 449 transitions. Second operand 32 states. [2018-03-28 13:14:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:38,760 INFO L93 Difference]: Finished difference Result 554 states and 574 transitions. [2018-03-28 13:14:38,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-28 13:14:38,761 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 350 [2018-03-28 13:14:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:38,762 INFO L225 Difference]: With dead ends: 554 [2018-03-28 13:14:38,763 INFO L226 Difference]: Without dead ends: 532 [2018-03-28 13:14:38,764 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 669 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1155, Invalid=2385, Unknown=0, NotChecked=0, Total=3540 [2018-03-28 13:14:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2018-03-28 13:14:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 513. [2018-03-28 13:14:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-03-28 13:14:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 532 transitions. [2018-03-28 13:14:38,793 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 532 transitions. Word has length 350 [2018-03-28 13:14:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:38,793 INFO L459 AbstractCegarLoop]: Abstraction has 513 states and 532 transitions. [2018-03-28 13:14:38,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-03-28 13:14:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 532 transitions. [2018-03-28 13:14:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-03-28 13:14:38,796 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:38,797 INFO L355 BasicCegarLoop]: trace histogram [35, 28, 27, 27, 27, 27, 27, 27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:38,797 INFO L408 AbstractCegarLoop]: === Iteration 33 === [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]=== [2018-03-28 13:14:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1024297914, now seen corresponding path program 14 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:38,806 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:38,907 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4115 backedges. 1547 proven. 153 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-03-28 13:14:39,338 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4115 backedges. 1547 proven. 153 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-03-28 13:14:39,749 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:39,749 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 44 [2018-03-28 13:14:39,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-03-28 13:14:39,750 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-03-28 13:14:39,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1782, Unknown=0, NotChecked=0, Total=1980 [2018-03-28 13:14:39,750 INFO L87 Difference]: Start difference. First operand 513 states and 532 transitions. Second operand 45 states. [2018-03-28 13:14:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:40,874 INFO L93 Difference]: Finished difference Result 533 states and 557 transitions. [2018-03-28 13:14:40,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-28 13:14:40,874 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 404 [2018-03-28 13:14:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:40,877 INFO L225 Difference]: With dead ends: 533 [2018-03-28 13:14:40,877 INFO L226 Difference]: Without dead ends: 532 [2018-03-28 13:14:40,878 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 748 SyntacticMatches, 17 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=696, Invalid=5466, Unknown=0, NotChecked=0, Total=6162 [2018-03-28 13:14:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2018-03-28 13:14:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 513. [2018-03-28 13:14:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-03-28 13:14:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 531 transitions. [2018-03-28 13:14:40,897 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 531 transitions. Word has length 404 [2018-03-28 13:14:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:40,898 INFO L459 AbstractCegarLoop]: Abstraction has 513 states and 531 transitions. [2018-03-28 13:14:40,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-03-28 13:14:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 531 transitions. [2018-03-28 13:14:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-03-28 13:14:40,900 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:40,900 INFO L355 BasicCegarLoop]: trace histogram [35, 27, 27, 27, 27, 27, 27, 27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:40,900 INFO L408 AbstractCegarLoop]: === Iteration 34 === [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]=== [2018-03-28 13:14:40,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1659511949, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:40,908 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:41,003 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 1540 proven. 147 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2018-03-28 13:14:41,429 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 1540 proven. 147 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2018-03-28 13:14:41,957 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:41,957 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 46 [2018-03-28 13:14:41,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-03-28 13:14:41,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-03-28 13:14:41,958 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2018-03-28 13:14:41,958 INFO L87 Difference]: Start difference. First operand 513 states and 531 transitions. Second operand 46 states. [2018-03-28 13:14:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:42,607 INFO L93 Difference]: Finished difference Result 704 states and 745 transitions. [2018-03-28 13:14:42,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-03-28 13:14:42,607 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 408 [2018-03-28 13:14:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:42,609 INFO L225 Difference]: With dead ends: 704 [2018-03-28 13:14:42,609 INFO L226 Difference]: Without dead ends: 529 [2018-03-28 13:14:42,610 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 755 SyntacticMatches, 17 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1038, Invalid=5282, Unknown=0, NotChecked=0, Total=6320 [2018-03-28 13:14:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2018-03-28 13:14:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 513. [2018-03-28 13:14:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-03-28 13:14:42,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 530 transitions. [2018-03-28 13:14:42,628 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 530 transitions. Word has length 408 [2018-03-28 13:14:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:42,629 INFO L459 AbstractCegarLoop]: Abstraction has 513 states and 530 transitions. [2018-03-28 13:14:42,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-03-28 13:14:42,629 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 530 transitions. [2018-03-28 13:14:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-03-28 13:14:42,632 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:42,632 INFO L355 BasicCegarLoop]: trace histogram [36, 29, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:42,632 INFO L408 AbstractCegarLoop]: === Iteration 35 === [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]=== [2018-03-28 13:14:42,632 INFO L82 PathProgramCache]: Analyzing trace with hash 45465067, now seen corresponding path program 15 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:42,646 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:42,733 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 1750 proven. 210 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-03-28 13:14:43,155 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 1750 proven. 210 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-03-28 13:14:43,570 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:43,571 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 49 [2018-03-28 13:14:43,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-03-28 13:14:43,571 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-03-28 13:14:43,571 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2018-03-28 13:14:43,572 INFO L87 Difference]: Start difference. First operand 513 states and 530 transitions. Second operand 49 states. [2018-03-28 13:14:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:44,594 INFO L93 Difference]: Finished difference Result 770 states and 803 transitions. [2018-03-28 13:14:44,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-03-28 13:14:44,595 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 413 [2018-03-28 13:14:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:44,597 INFO L225 Difference]: With dead ends: 770 [2018-03-28 13:14:44,597 INFO L226 Difference]: Without dead ends: 598 [2018-03-28 13:14:44,599 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 761 SyntacticMatches, 17 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1347, Invalid=7209, Unknown=0, NotChecked=0, Total=8556 [2018-03-28 13:14:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2018-03-28 13:14:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 587. [2018-03-28 13:14:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2018-03-28 13:14:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 603 transitions. [2018-03-28 13:14:44,619 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 603 transitions. Word has length 413 [2018-03-28 13:14:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:44,619 INFO L459 AbstractCegarLoop]: Abstraction has 587 states and 603 transitions. [2018-03-28 13:14:44,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-03-28 13:14:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 603 transitions. [2018-03-28 13:14:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2018-03-28 13:14:44,621 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:44,621 INFO L355 BasicCegarLoop]: trace histogram [36, 28, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:44,621 INFO L408 AbstractCegarLoop]: === Iteration 36 === [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]=== [2018-03-28 13:14:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash 302484772, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:44,630 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:44,757 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:44,760 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 [2018-03-28 13:14:44,761 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:44,779 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:44,779 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:14:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-03-28 13:14:45,567 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-03-28 13:14:46,266 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:46,267 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2018-03-28 13:14:46,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-03-28 13:14:46,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-03-28 13:14:46,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2018-03-28 13:14:46,268 INFO L87 Difference]: Start difference. First operand 587 states and 603 transitions. Second operand 35 states. [2018-03-28 13:14:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:47,952 INFO L93 Difference]: Finished difference Result 599 states and 617 transitions. [2018-03-28 13:14:47,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-03-28 13:14:47,952 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 417 [2018-03-28 13:14:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:47,954 INFO L225 Difference]: With dead ends: 599 [2018-03-28 13:14:47,954 INFO L226 Difference]: Without dead ends: 598 [2018-03-28 13:14:47,954 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 785 SyntacticMatches, 15 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1299, Invalid=3531, Unknown=0, NotChecked=0, Total=4830 [2018-03-28 13:14:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2018-03-28 13:14:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 590. [2018-03-28 13:14:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2018-03-28 13:14:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 600 transitions. [2018-03-28 13:14:47,976 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 600 transitions. Word has length 417 [2018-03-28 13:14:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:47,977 INFO L459 AbstractCegarLoop]: Abstraction has 590 states and 600 transitions. [2018-03-28 13:14:47,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-03-28 13:14:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 600 transitions. [2018-03-28 13:14:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-03-28 13:14:47,980 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:47,981 INFO L355 BasicCegarLoop]: trace histogram [44, 36, 35, 35, 35, 35, 35, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:47,981 INFO L408 AbstractCegarLoop]: === Iteration 37 === [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]=== [2018-03-28 13:14:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash -814443753, now seen corresponding path program 16 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:47,993 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:48,098 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6668 backedges. 2300 proven. 210 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-03-28 13:14:48,540 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6668 backedges. 2300 proven. 210 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-03-28 13:14:49,065 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:49,066 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 50 [2018-03-28 13:14:49,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-03-28 13:14:49,066 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-03-28 13:14:49,067 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2018-03-28 13:14:49,067 INFO L87 Difference]: Start difference. First operand 590 states and 600 transitions. Second operand 51 states. [2018-03-28 13:14:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:50,459 INFO L93 Difference]: Finished difference Result 620 states and 637 transitions. [2018-03-28 13:14:50,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-03-28 13:14:50,459 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 496 [2018-03-28 13:14:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:50,461 INFO L225 Difference]: With dead ends: 620 [2018-03-28 13:14:50,462 INFO L226 Difference]: Without dead ends: 619 [2018-03-28 13:14:50,463 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 925 SyntacticMatches, 19 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=865, Invalid=7145, Unknown=0, NotChecked=0, Total=8010 [2018-03-28 13:14:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2018-03-28 13:14:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 598. [2018-03-28 13:14:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2018-03-28 13:14:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 609 transitions. [2018-03-28 13:14:50,487 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 609 transitions. Word has length 496 [2018-03-28 13:14:50,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:50,487 INFO L459 AbstractCegarLoop]: Abstraction has 598 states and 609 transitions. [2018-03-28 13:14:50,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-03-28 13:14:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 609 transitions. [2018-03-28 13:14:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-03-28 13:14:50,491 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:50,491 INFO L355 BasicCegarLoop]: trace histogram [44, 36, 36, 35, 35, 35, 35, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:50,491 INFO L408 AbstractCegarLoop]: === Iteration 38 === [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]=== [2018-03-28 13:14:50,491 INFO L82 PathProgramCache]: Analyzing trace with hash 522047549, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:50,503 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:50,620 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:50,625 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 [2018-03-28 13:14:50,626 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:14:50,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:14:50,630 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:14:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6703 backedges. 2052 proven. 217 refuted. 0 times theorem prover too weak. 4434 trivial. 0 not checked. [2018-03-28 13:14:51,304 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6703 backedges. 2052 proven. 217 refuted. 0 times theorem prover too weak. 4434 trivial. 0 not checked. [2018-03-28 13:14:51,911 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:51,911 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2018-03-28 13:14:51,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-03-28 13:14:51,912 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-03-28 13:14:51,912 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2018-03-28 13:14:51,912 INFO L87 Difference]: Start difference. First operand 598 states and 609 transitions. Second operand 39 states. [2018-03-28 13:14:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:54,166 INFO L93 Difference]: Finished difference Result 694 states and 775 transitions. [2018-03-28 13:14:54,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-03-28 13:14:54,167 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 497 [2018-03-28 13:14:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:54,169 INFO L225 Difference]: With dead ends: 694 [2018-03-28 13:14:54,169 INFO L226 Difference]: Without dead ends: 693 [2018-03-28 13:14:54,170 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 949 SyntacticMatches, 15 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1574, Invalid=5232, Unknown=0, NotChecked=0, Total=6806 [2018-03-28 13:14:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2018-03-28 13:14:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 662. [2018-03-28 13:14:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2018-03-28 13:14:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 687 transitions. [2018-03-28 13:14:54,198 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 687 transitions. Word has length 497 [2018-03-28 13:14:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:54,198 INFO L459 AbstractCegarLoop]: Abstraction has 662 states and 687 transitions. [2018-03-28 13:14:54,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-03-28 13:14:54,198 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 687 transitions. [2018-03-28 13:14:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2018-03-28 13:14:54,200 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:54,201 INFO L355 BasicCegarLoop]: trace histogram [45, 37, 36, 36, 36, 36, 36, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:54,201 INFO L408 AbstractCegarLoop]: === Iteration 39 === [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]=== [2018-03-28 13:14:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -185290962, now seen corresponding path program 17 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:54,227 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:54,325 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7002 backedges. 2568 proven. 276 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-03-28 13:14:54,766 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7002 backedges. 2568 proven. 276 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-03-28 13:14:55,274 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:55,274 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 55 [2018-03-28 13:14:55,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-03-28 13:14:55,275 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-03-28 13:14:55,275 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2573, Unknown=0, NotChecked=0, Total=2970 [2018-03-28 13:14:55,275 INFO L87 Difference]: Start difference. First operand 662 states and 687 transitions. Second operand 55 states. [2018-03-28 13:14:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:56,440 INFO L93 Difference]: Finished difference Result 996 states and 1047 transitions. [2018-03-28 13:14:56,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-03-28 13:14:56,441 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 505 [2018-03-28 13:14:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:56,443 INFO L225 Difference]: With dead ends: 996 [2018-03-28 13:14:56,443 INFO L226 Difference]: Without dead ends: 758 [2018-03-28 13:14:56,445 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 937 SyntacticMatches, 19 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1688, Invalid=9232, Unknown=0, NotChecked=0, Total=10920 [2018-03-28 13:14:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2018-03-28 13:14:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 745. [2018-03-28 13:14:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2018-03-28 13:14:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 770 transitions. [2018-03-28 13:14:56,468 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 770 transitions. Word has length 505 [2018-03-28 13:14:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:56,468 INFO L459 AbstractCegarLoop]: Abstraction has 745 states and 770 transitions. [2018-03-28 13:14:56,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-03-28 13:14:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 770 transitions. [2018-03-28 13:14:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2018-03-28 13:14:56,471 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:56,471 INFO L355 BasicCegarLoop]: trace histogram [53, 44, 43, 43, 43, 43, 43, 43, 43, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:56,471 INFO L408 AbstractCegarLoop]: === Iteration 40 === [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]=== [2018-03-28 13:14:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1981672026, now seen corresponding path program 18 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:56,477 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:56,579 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9849 backedges. 5188 proven. 203 refuted. 0 times theorem prover too weak. 4458 trivial. 0 not checked. [2018-03-28 13:14:57,042 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9849 backedges. 5188 proven. 203 refuted. 0 times theorem prover too weak. 4458 trivial. 0 not checked. [2018-03-28 13:14:57,637 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:57,638 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 52 [2018-03-28 13:14:57,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-03-28 13:14:57,639 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-03-28 13:14:57,639 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2018-03-28 13:14:57,639 INFO L87 Difference]: Start difference. First operand 745 states and 770 transitions. Second operand 52 states. [2018-03-28 13:14:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:58,361 INFO L93 Difference]: Finished difference Result 1001 states and 1055 transitions. [2018-03-28 13:14:58,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-03-28 13:14:58,361 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 588 [2018-03-28 13:14:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:58,363 INFO L225 Difference]: With dead ends: 1001 [2018-03-28 13:14:58,363 INFO L226 Difference]: Without dead ends: 757 [2018-03-28 13:14:58,365 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1107 SyntacticMatches, 19 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1322, Invalid=6868, Unknown=0, NotChecked=0, Total=8190 [2018-03-28 13:14:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2018-03-28 13:14:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 745. [2018-03-28 13:14:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2018-03-28 13:14:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 768 transitions. [2018-03-28 13:14:58,388 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 768 transitions. Word has length 588 [2018-03-28 13:14:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:58,389 INFO L459 AbstractCegarLoop]: Abstraction has 745 states and 768 transitions. [2018-03-28 13:14:58,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-03-28 13:14:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 768 transitions. [2018-03-28 13:14:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-03-28 13:14:58,392 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:58,392 INFO L355 BasicCegarLoop]: trace histogram [54, 45, 44, 44, 44, 44, 44, 44, 44, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:58,392 INFO L408 AbstractCegarLoop]: === Iteration 41 === [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]=== [2018-03-28 13:14:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1138665999, now seen corresponding path program 19 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:58,406 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:58,524 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10257 backedges. 3267 proven. 276 refuted. 0 times theorem prover too weak. 6714 trivial. 0 not checked. [2018-03-28 13:14:59,069 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10257 backedges. 3267 proven. 276 refuted. 0 times theorem prover too weak. 6714 trivial. 0 not checked. [2018-03-28 13:14:59,717 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:59,717 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 56 [2018-03-28 13:14:59,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-03-28 13:14:59,718 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-03-28 13:14:59,718 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2018-03-28 13:14:59,718 INFO L87 Difference]: Start difference. First operand 745 states and 768 transitions. Second operand 57 states. [2018-03-28 13:15:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:01,415 INFO L93 Difference]: Finished difference Result 761 states and 788 transitions. [2018-03-28 13:15:01,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-03-28 13:15:01,415 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 597 [2018-03-28 13:15:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:01,417 INFO L225 Difference]: With dead ends: 761 [2018-03-28 13:15:01,417 INFO L226 Difference]: Without dead ends: 760 [2018-03-28 13:15:01,418 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1238 GetRequests, 1118 SyntacticMatches, 21 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3022 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1051, Invalid=9049, Unknown=0, NotChecked=0, Total=10100 [2018-03-28 13:15:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2018-03-28 13:15:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 745. [2018-03-28 13:15:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2018-03-28 13:15:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 767 transitions. [2018-03-28 13:15:01,446 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 767 transitions. Word has length 597 [2018-03-28 13:15:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:01,446 INFO L459 AbstractCegarLoop]: Abstraction has 745 states and 767 transitions. [2018-03-28 13:15:01,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-03-28 13:15:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 767 transitions. [2018-03-28 13:15:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2018-03-28 13:15:01,449 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:01,449 INFO L355 BasicCegarLoop]: trace histogram [55, 46, 45, 45, 45, 45, 45, 45, 45, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:01,449 INFO L408 AbstractCegarLoop]: === Iteration 42 === [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]=== [2018-03-28 13:15:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash 940343700, now seen corresponding path program 20 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:01,455 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:01,556 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10674 backedges. 3609 proven. 351 refuted. 0 times theorem prover too weak. 6714 trivial. 0 not checked. [2018-03-28 13:15:02,124 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10674 backedges. 3609 proven. 351 refuted. 0 times theorem prover too weak. 6714 trivial. 0 not checked. [2018-03-28 13:15:02,787 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:02,788 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 61 [2018-03-28 13:15:02,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-03-28 13:15:02,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-03-28 13:15:02,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2018-03-28 13:15:02,790 INFO L87 Difference]: Start difference. First operand 745 states and 767 transitions. Second operand 61 states. [2018-03-28 13:15:04,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:04,407 INFO L93 Difference]: Finished difference Result 1079 states and 1124 transitions. [2018-03-28 13:15:04,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-03-28 13:15:04,408 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 606 [2018-03-28 13:15:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:04,411 INFO L225 Difference]: With dead ends: 1079 [2018-03-28 13:15:04,412 INFO L226 Difference]: Without dead ends: 850 [2018-03-28 13:15:04,414 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1267 GetRequests, 1131 SyntacticMatches, 21 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2067, Invalid=11505, Unknown=0, NotChecked=0, Total=13572 [2018-03-28 13:15:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2018-03-28 13:15:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 837. [2018-03-28 13:15:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2018-03-28 13:15:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 859 transitions. [2018-03-28 13:15:04,462 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 859 transitions. Word has length 606 [2018-03-28 13:15:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:04,463 INFO L459 AbstractCegarLoop]: Abstraction has 837 states and 859 transitions. [2018-03-28 13:15:04,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-03-28 13:15:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 859 transitions. [2018-03-28 13:15:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2018-03-28 13:15:04,466 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:04,466 INFO L355 BasicCegarLoop]: trace histogram [64, 54, 53, 53, 53, 53, 53, 53, 53, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:04,466 INFO L408 AbstractCegarLoop]: === Iteration 43 === [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]=== [2018-03-28 13:15:04,466 INFO L82 PathProgramCache]: Analyzing trace with hash -942309199, now seen corresponding path program 21 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:04,472 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:04,608 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14631 backedges. 7271 proven. 268 refuted. 0 times theorem prover too weak. 7092 trivial. 0 not checked. [2018-03-28 13:15:05,256 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14631 backedges. 7271 proven. 268 refuted. 0 times theorem prover too weak. 7092 trivial. 0 not checked. [2018-03-28 13:15:06,045 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:06,045 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 58 [2018-03-28 13:15:06,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-03-28 13:15:06,046 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-03-28 13:15:06,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=2850, Unknown=0, NotChecked=0, Total=3306 [2018-03-28 13:15:06,047 INFO L87 Difference]: Start difference. First operand 837 states and 859 transitions. Second operand 58 states. [2018-03-28 13:15:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:07,140 INFO L93 Difference]: Finished difference Result 1084 states and 1131 transitions. [2018-03-28 13:15:07,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-03-28 13:15:07,141 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 698 [2018-03-28 13:15:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:07,143 INFO L225 Difference]: With dead ends: 1084 [2018-03-28 13:15:07,143 INFO L226 Difference]: Without dead ends: 849 [2018-03-28 13:15:07,145 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1440 GetRequests, 1319 SyntacticMatches, 21 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1640, Invalid=8662, Unknown=0, NotChecked=0, Total=10302 [2018-03-28 13:15:07,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2018-03-28 13:15:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 837. [2018-03-28 13:15:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2018-03-28 13:15:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 857 transitions. [2018-03-28 13:15:07,178 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 857 transitions. Word has length 698 [2018-03-28 13:15:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:07,178 INFO L459 AbstractCegarLoop]: Abstraction has 837 states and 857 transitions. [2018-03-28 13:15:07,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-03-28 13:15:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 857 transitions. [2018-03-28 13:15:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2018-03-28 13:15:07,182 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:07,182 INFO L355 BasicCegarLoop]: trace histogram [65, 55, 54, 54, 54, 54, 54, 54, 54, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:07,182 INFO L408 AbstractCegarLoop]: === Iteration 44 === [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]=== [2018-03-28 13:15:07,182 INFO L82 PathProgramCache]: Analyzing trace with hash 786597614, now seen corresponding path program 22 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:07,195 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:07,344 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15131 backedges. 4475 proven. 351 refuted. 0 times theorem prover too weak. 10305 trivial. 0 not checked. [2018-03-28 13:15:08,029 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15131 backedges. 4475 proven. 351 refuted. 0 times theorem prover too weak. 10305 trivial. 0 not checked. [2018-03-28 13:15:08,841 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:08,841 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 62 [2018-03-28 13:15:08,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-03-28 13:15:08,842 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-03-28 13:15:08,842 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=3564, Unknown=0, NotChecked=0, Total=3906 [2018-03-28 13:15:08,842 INFO L87 Difference]: Start difference. First operand 837 states and 857 transitions. Second operand 63 states. [2018-03-28 13:15:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:10,887 INFO L93 Difference]: Finished difference Result 853 states and 876 transitions. [2018-03-28 13:15:10,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-03-28 13:15:10,887 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 707 [2018-03-28 13:15:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:10,889 INFO L225 Difference]: With dead ends: 853 [2018-03-28 13:15:10,889 INFO L226 Difference]: Without dead ends: 852 [2018-03-28 13:15:10,890 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1463 GetRequests, 1330 SyntacticMatches, 23 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1254, Invalid=11178, Unknown=0, NotChecked=0, Total=12432 [2018-03-28 13:15:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2018-03-28 13:15:10,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 837. [2018-03-28 13:15:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2018-03-28 13:15:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 856 transitions. [2018-03-28 13:15:10,916 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 856 transitions. Word has length 707 [2018-03-28 13:15:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:10,916 INFO L459 AbstractCegarLoop]: Abstraction has 837 states and 856 transitions. [2018-03-28 13:15:10,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-03-28 13:15:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 856 transitions. [2018-03-28 13:15:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2018-03-28 13:15:10,919 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:10,920 INFO L355 BasicCegarLoop]: trace histogram [66, 56, 55, 55, 55, 55, 55, 55, 55, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:10,920 INFO L408 AbstractCegarLoop]: === Iteration 45 === [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]=== [2018-03-28 13:15:10,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2143937225, now seen corresponding path program 23 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:10,925 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:11,045 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15640 backedges. 4900 proven. 435 refuted. 0 times theorem prover too weak. 10305 trivial. 0 not checked. [2018-03-28 13:15:11,726 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15640 backedges. 4900 proven. 435 refuted. 0 times theorem prover too weak. 10305 trivial. 0 not checked. [2018-03-28 13:15:12,513 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:12,513 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 67 [2018-03-28 13:15:12,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-03-28 13:15:12,514 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-03-28 13:15:12,514 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2018-03-28 13:15:12,514 INFO L87 Difference]: Start difference. First operand 837 states and 856 transitions. Second operand 67 states. [2018-03-28 13:15:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:14,085 INFO L93 Difference]: Finished difference Result 1171 states and 1210 transitions. [2018-03-28 13:15:14,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-03-28 13:15:14,086 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 716 [2018-03-28 13:15:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:14,088 INFO L225 Difference]: With dead ends: 1171 [2018-03-28 13:15:14,088 INFO L226 Difference]: Without dead ends: 951 [2018-03-28 13:15:14,090 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1343 SyntacticMatches, 23 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2484, Invalid=14028, Unknown=0, NotChecked=0, Total=16512 [2018-03-28 13:15:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2018-03-28 13:15:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 938. [2018-03-28 13:15:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2018-03-28 13:15:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 957 transitions. [2018-03-28 13:15:14,119 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 957 transitions. Word has length 716 [2018-03-28 13:15:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:14,119 INFO L459 AbstractCegarLoop]: Abstraction has 938 states and 957 transitions. [2018-03-28 13:15:14,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-03-28 13:15:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 957 transitions. [2018-03-28 13:15:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2018-03-28 13:15:14,123 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:14,124 INFO L355 BasicCegarLoop]: trace histogram [76, 65, 64, 64, 64, 64, 64, 64, 64, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:14,124 INFO L408 AbstractCegarLoop]: === Iteration 46 === [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]=== [2018-03-28 13:15:14,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2079259375, now seen corresponding path program 24 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:14,132 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:14,272 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20965 backedges. 9853 proven. 342 refuted. 0 times theorem prover too weak. 10770 trivial. 0 not checked. [2018-03-28 13:15:14,971 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20965 backedges. 9853 proven. 342 refuted. 0 times theorem prover too weak. 10770 trivial. 0 not checked. [2018-03-28 13:15:15,885 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:15,886 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 64 [2018-03-28 13:15:15,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-03-28 13:15:15,887 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-03-28 13:15:15,887 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=3486, Unknown=0, NotChecked=0, Total=4032 [2018-03-28 13:15:15,887 INFO L87 Difference]: Start difference. First operand 938 states and 957 transitions. Second operand 64 states. [2018-03-28 13:15:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:17,214 INFO L93 Difference]: Finished difference Result 1176 states and 1216 transitions. [2018-03-28 13:15:17,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-03-28 13:15:17,215 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 817 [2018-03-28 13:15:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:17,218 INFO L225 Difference]: With dead ends: 1176 [2018-03-28 13:15:17,218 INFO L226 Difference]: Without dead ends: 950 [2018-03-28 13:15:17,220 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1549 SyntacticMatches, 23 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4780 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1992, Invalid=10664, Unknown=0, NotChecked=0, Total=12656 [2018-03-28 13:15:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2018-03-28 13:15:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 938. [2018-03-28 13:15:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2018-03-28 13:15:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 955 transitions. [2018-03-28 13:15:17,271 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 955 transitions. Word has length 817 [2018-03-28 13:15:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:17,272 INFO L459 AbstractCegarLoop]: Abstraction has 938 states and 955 transitions. [2018-03-28 13:15:17,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-03-28 13:15:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 955 transitions. [2018-03-28 13:15:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2018-03-28 13:15:17,279 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:17,279 INFO L355 BasicCegarLoop]: trace histogram [77, 66, 65, 65, 65, 65, 65, 65, 65, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:17,279 INFO L408 AbstractCegarLoop]: === Iteration 47 === [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]=== [2018-03-28 13:15:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash 451558298, now seen corresponding path program 25 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:17,287 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:17,449 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21566 backedges. 5951 proven. 435 refuted. 0 times theorem prover too weak. 15180 trivial. 0 not checked. [2018-03-28 13:15:18,310 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21566 backedges. 5951 proven. 435 refuted. 0 times theorem prover too weak. 15180 trivial. 0 not checked. [2018-03-28 13:15:19,311 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:19,311 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 68 [2018-03-28 13:15:19,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-03-28 13:15:19,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-03-28 13:15:19,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=4294, Unknown=0, NotChecked=0, Total=4692 [2018-03-28 13:15:19,312 INFO L87 Difference]: Start difference. First operand 938 states and 955 transitions. Second operand 69 states. [2018-03-28 13:15:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:21,666 INFO L93 Difference]: Finished difference Result 954 states and 973 transitions. [2018-03-28 13:15:21,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-03-28 13:15:21,667 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 826 [2018-03-28 13:15:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:21,669 INFO L225 Difference]: With dead ends: 954 [2018-03-28 13:15:21,669 INFO L226 Difference]: Without dead ends: 953 [2018-03-28 13:15:21,670 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1706 GetRequests, 1560 SyntacticMatches, 25 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4583 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1474, Invalid=13532, Unknown=0, NotChecked=0, Total=15006 [2018-03-28 13:15:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2018-03-28 13:15:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 938. [2018-03-28 13:15:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2018-03-28 13:15:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 954 transitions. [2018-03-28 13:15:21,699 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 954 transitions. Word has length 826 [2018-03-28 13:15:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:21,699 INFO L459 AbstractCegarLoop]: Abstraction has 938 states and 954 transitions. [2018-03-28 13:15:21,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-03-28 13:15:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 954 transitions. [2018-03-28 13:15:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2018-03-28 13:15:21,703 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:21,704 INFO L355 BasicCegarLoop]: trace histogram [78, 67, 66, 66, 66, 66, 66, 66, 66, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:21,704 INFO L408 AbstractCegarLoop]: === Iteration 48 === [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]=== [2018-03-28 13:15:21,704 INFO L82 PathProgramCache]: Analyzing trace with hash -252646901, now seen corresponding path program 26 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:21,711 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:21,853 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 22176 backedges. 6468 proven. 528 refuted. 0 times theorem prover too weak. 15180 trivial. 0 not checked. [2018-03-28 13:15:22,662 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22176 backedges. 6468 proven. 528 refuted. 0 times theorem prover too weak. 15180 trivial. 0 not checked. [2018-03-28 13:15:23,641 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:23,642 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 73 [2018-03-28 13:15:23,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-03-28 13:15:23,642 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-03-28 13:15:23,643 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=4583, Unknown=0, NotChecked=0, Total=5256 [2018-03-28 13:15:23,643 INFO L87 Difference]: Start difference. First operand 938 states and 954 transitions. Second operand 73 states. [2018-03-28 13:15:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:25,684 INFO L93 Difference]: Finished difference Result 1272 states and 1305 transitions. [2018-03-28 13:15:25,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-03-28 13:15:25,684 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 835 [2018-03-28 13:15:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:25,687 INFO L225 Difference]: With dead ends: 1272 [2018-03-28 13:15:25,687 INFO L226 Difference]: Without dead ends: 1061 [2018-03-28 13:15:25,690 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1737 GetRequests, 1573 SyntacticMatches, 25 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5255 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2939, Invalid=16801, Unknown=0, NotChecked=0, Total=19740 [2018-03-28 13:15:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2018-03-28 13:15:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1048. [2018-03-28 13:15:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-03-28 13:15:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1064 transitions. [2018-03-28 13:15:25,737 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1064 transitions. Word has length 835 [2018-03-28 13:15:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:25,737 INFO L459 AbstractCegarLoop]: Abstraction has 1048 states and 1064 transitions. [2018-03-28 13:15:25,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-03-28 13:15:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1064 transitions. [2018-03-28 13:15:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2018-03-28 13:15:25,742 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:25,742 INFO L355 BasicCegarLoop]: trace histogram [89, 77, 76, 76, 76, 76, 76, 76, 76, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:25,743 INFO L408 AbstractCegarLoop]: === Iteration 49 === [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]=== [2018-03-28 13:15:25,743 INFO L82 PathProgramCache]: Analyzing trace with hash -5984184, now seen corresponding path program 27 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:25,758 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:25,917 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 29154 backedges. 12988 proven. 425 refuted. 0 times theorem prover too weak. 15741 trivial. 0 not checked. [2018-03-28 13:15:26,783 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 29154 backedges. 12988 proven. 425 refuted. 0 times theorem prover too weak. 15741 trivial. 0 not checked. [2018-03-28 13:15:27,839 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:27,839 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 70 [2018-03-28 13:15:27,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-03-28 13:15:27,840 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-03-28 13:15:27,840 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=4186, Unknown=0, NotChecked=0, Total=4830 [2018-03-28 13:15:27,840 INFO L87 Difference]: Start difference. First operand 1048 states and 1064 transitions. Second operand 70 states. [2018-03-28 13:15:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:29,102 INFO L93 Difference]: Finished difference Result 1277 states and 1310 transitions. [2018-03-28 13:15:29,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-03-28 13:15:29,102 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 945 [2018-03-28 13:15:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:29,105 INFO L225 Difference]: With dead ends: 1277 [2018-03-28 13:15:29,105 INFO L226 Difference]: Without dead ends: 1060 [2018-03-28 13:15:29,107 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1944 GetRequests, 1797 SyntacticMatches, 25 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5824 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2378, Invalid=12874, Unknown=0, NotChecked=0, Total=15252 [2018-03-28 13:15:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2018-03-28 13:15:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1048. [2018-03-28 13:15:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-03-28 13:15:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1062 transitions. [2018-03-28 13:15:29,139 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1062 transitions. Word has length 945 [2018-03-28 13:15:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:29,140 INFO L459 AbstractCegarLoop]: Abstraction has 1048 states and 1062 transitions. [2018-03-28 13:15:29,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-03-28 13:15:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1062 transitions. [2018-03-28 13:15:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2018-03-28 13:15:29,145 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:29,145 INFO L355 BasicCegarLoop]: trace histogram [90, 78, 77, 77, 77, 77, 77, 77, 77, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:29,145 INFO L408 AbstractCegarLoop]: === Iteration 50 === [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]=== [2018-03-28 13:15:29,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1308500297, now seen corresponding path program 28 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:29,152 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:29,312 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 29865 backedges. 7722 proven. 528 refuted. 0 times theorem prover too weak. 21615 trivial. 0 not checked. [2018-03-28 13:15:30,291 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 29865 backedges. 7722 proven. 528 refuted. 0 times theorem prover too weak. 21615 trivial. 0 not checked. [2018-03-28 13:15:31,540 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:31,540 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 74 [2018-03-28 13:15:31,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-03-28 13:15:31,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-03-28 13:15:31,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=5092, Unknown=0, NotChecked=0, Total=5550 [2018-03-28 13:15:31,542 INFO L87 Difference]: Start difference. First operand 1048 states and 1062 transitions. Second operand 75 states. [2018-03-28 13:15:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:34,120 INFO L93 Difference]: Finished difference Result 1064 states and 1079 transitions. [2018-03-28 13:15:34,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-03-28 13:15:34,121 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 954 [2018-03-28 13:15:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:34,123 INFO L225 Difference]: With dead ends: 1064 [2018-03-28 13:15:34,123 INFO L226 Difference]: Without dead ends: 1063 [2018-03-28 13:15:34,125 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1808 SyntacticMatches, 27 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5485 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1711, Invalid=16111, Unknown=0, NotChecked=0, Total=17822 [2018-03-28 13:15:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2018-03-28 13:15:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1048. [2018-03-28 13:15:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-03-28 13:15:34,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1061 transitions. [2018-03-28 13:15:34,158 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1061 transitions. Word has length 954 [2018-03-28 13:15:34,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:34,159 INFO L459 AbstractCegarLoop]: Abstraction has 1048 states and 1061 transitions. [2018-03-28 13:15:34,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-03-28 13:15:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1061 transitions. [2018-03-28 13:15:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2018-03-28 13:15:34,164 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:34,164 INFO L355 BasicCegarLoop]: trace histogram [91, 79, 78, 78, 78, 78, 78, 78, 78, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:34,164 INFO L408 AbstractCegarLoop]: === Iteration 51 === [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]=== [2018-03-28 13:15:34,165 INFO L82 PathProgramCache]: Analyzing trace with hash -753764466, now seen corresponding path program 29 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:34,170 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:34,326 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30585 backedges. 8340 proven. 630 refuted. 0 times theorem prover too weak. 21615 trivial. 0 not checked. [2018-03-28 13:15:35,311 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30585 backedges. 8340 proven. 630 refuted. 0 times theorem prover too weak. 21615 trivial. 0 not checked. [2018-03-28 13:15:36,565 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:36,565 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 79 [2018-03-28 13:15:36,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-03-28 13:15:36,566 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-03-28 13:15:36,567 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=5381, Unknown=0, NotChecked=0, Total=6162 [2018-03-28 13:15:36,567 INFO L87 Difference]: Start difference. First operand 1048 states and 1061 transitions. Second operand 79 states. [2018-03-28 13:15:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:38,736 INFO L93 Difference]: Finished difference Result 1382 states and 1409 transitions. [2018-03-28 13:15:38,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-03-28 13:15:38,736 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 963 [2018-03-28 13:15:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:38,739 INFO L225 Difference]: With dead ends: 1382 [2018-03-28 13:15:38,739 INFO L226 Difference]: Without dead ends: 1180 [2018-03-28 13:15:38,741 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1999 GetRequests, 1821 SyntacticMatches, 27 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6243 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3432, Invalid=19824, Unknown=0, NotChecked=0, Total=23256 [2018-03-28 13:15:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2018-03-28 13:15:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1167. [2018-03-28 13:15:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2018-03-28 13:15:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1180 transitions. [2018-03-28 13:15:38,778 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1180 transitions. Word has length 963 [2018-03-28 13:15:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:38,779 INFO L459 AbstractCegarLoop]: Abstraction has 1167 states and 1180 transitions. [2018-03-28 13:15:38,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-03-28 13:15:38,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1180 transitions. [2018-03-28 13:15:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1083 [2018-03-28 13:15:38,785 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:38,786 INFO L355 BasicCegarLoop]: trace histogram [103, 90, 89, 89, 89, 89, 89, 89, 89, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:38,786 INFO L408 AbstractCegarLoop]: === Iteration 52 === [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]=== [2018-03-28 13:15:38,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1792234438, now seen corresponding path program 30 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:38,791 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:38,970 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 39528 backedges. 16730 proven. 517 refuted. 0 times theorem prover too weak. 22281 trivial. 0 not checked. [2018-03-28 13:15:40,031 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 39528 backedges. 16730 proven. 517 refuted. 0 times theorem prover too weak. 22281 trivial. 0 not checked. [2018-03-28 13:15:41,319 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:41,319 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 76 [2018-03-28 13:15:41,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-03-28 13:15:41,320 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-03-28 13:15:41,321 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=4950, Unknown=0, NotChecked=0, Total=5700 [2018-03-28 13:15:41,321 INFO L87 Difference]: Start difference. First operand 1167 states and 1180 transitions. Second operand 76 states. [2018-03-28 13:15:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:42,606 INFO L93 Difference]: Finished difference Result 1387 states and 1413 transitions. [2018-03-28 13:15:42,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-03-28 13:15:42,606 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 1082 [2018-03-28 13:15:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:42,609 INFO L225 Difference]: With dead ends: 1387 [2018-03-28 13:15:42,609 INFO L226 Difference]: Without dead ends: 1179 [2018-03-28 13:15:42,611 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2223 GetRequests, 2063 SyntacticMatches, 27 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6971 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2798, Invalid=15292, Unknown=0, NotChecked=0, Total=18090 [2018-03-28 13:15:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2018-03-28 13:15:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1167. [2018-03-28 13:15:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2018-03-28 13:15:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1178 transitions. [2018-03-28 13:15:42,660 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1178 transitions. Word has length 1082 [2018-03-28 13:15:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:42,660 INFO L459 AbstractCegarLoop]: Abstraction has 1167 states and 1178 transitions. [2018-03-28 13:15:42,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-03-28 13:15:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1178 transitions. [2018-03-28 13:15:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1092 [2018-03-28 13:15:42,670 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:42,671 INFO L355 BasicCegarLoop]: trace histogram [104, 91, 90, 90, 90, 90, 90, 90, 90, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:42,671 INFO L408 AbstractCegarLoop]: === Iteration 53 === [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]=== [2018-03-28 13:15:42,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1511576849, now seen corresponding path program 31 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:42,677 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:42,855 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 40358 backedges. 9815 proven. 630 refuted. 0 times theorem prover too weak. 29913 trivial. 0 not checked. [2018-03-28 13:15:44,010 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 40358 backedges. 9815 proven. 630 refuted. 0 times theorem prover too weak. 29913 trivial. 0 not checked. [2018-03-28 13:15:45,418 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:45,447 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 80 [2018-03-28 13:15:45,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-03-28 13:15:45,448 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-03-28 13:15:45,448 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=5958, Unknown=0, NotChecked=0, Total=6480 [2018-03-28 13:15:45,448 INFO L87 Difference]: Start difference. First operand 1167 states and 1178 transitions. Second operand 81 states. [2018-03-28 13:15:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:48,385 INFO L93 Difference]: Finished difference Result 1183 states and 1194 transitions. [2018-03-28 13:15:48,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-03-28 13:15:48,385 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 1091 [2018-03-28 13:15:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:48,388 INFO L225 Difference]: With dead ends: 1183 [2018-03-28 13:15:48,388 INFO L226 Difference]: Without dead ends: 1182 [2018-03-28 13:15:48,390 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2246 GetRequests, 2074 SyntacticMatches, 29 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6468 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1965, Invalid=18915, Unknown=0, NotChecked=0, Total=20880 [2018-03-28 13:15:48,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2018-03-28 13:15:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1167. [2018-03-28 13:15:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2018-03-28 13:15:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1177 transitions. [2018-03-28 13:15:48,437 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1177 transitions. Word has length 1091 [2018-03-28 13:15:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:48,437 INFO L459 AbstractCegarLoop]: Abstraction has 1167 states and 1177 transitions. [2018-03-28 13:15:48,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-03-28 13:15:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1177 transitions. [2018-03-28 13:15:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1101 [2018-03-28 13:15:48,444 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:48,444 INFO L355 BasicCegarLoop]: trace histogram [105, 92, 91, 91, 91, 91, 91, 91, 91, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:48,444 INFO L408 AbstractCegarLoop]: === Iteration 54 === [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]=== [2018-03-28 13:15:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1480722036, now seen corresponding path program 32 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:48,450 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:48,634 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 41197 backedges. 10543 proven. 741 refuted. 0 times theorem prover too weak. 29913 trivial. 0 not checked. [2018-03-28 13:15:49,808 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41197 backedges. 10543 proven. 741 refuted. 0 times theorem prover too weak. 29913 trivial. 0 not checked. [2018-03-28 13:15:51,155 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:51,155 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 85 [2018-03-28 13:15:51,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-03-28 13:15:51,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-03-28 13:15:51,157 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=6243, Unknown=0, NotChecked=0, Total=7140 [2018-03-28 13:15:51,157 INFO L87 Difference]: Start difference. First operand 1167 states and 1177 transitions. Second operand 85 states. [2018-03-28 13:15:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:53,619 INFO L93 Difference]: Finished difference Result 1501 states and 1522 transitions. [2018-03-28 13:15:53,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-03-28 13:15:53,619 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 1100 [2018-03-28 13:15:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:53,622 INFO L225 Difference]: With dead ends: 1501 [2018-03-28 13:15:53,622 INFO L226 Difference]: Without dead ends: 1308 [2018-03-28 13:15:53,624 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2279 GetRequests, 2087 SyntacticMatches, 29 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7316 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3963, Invalid=23097, Unknown=0, NotChecked=0, Total=27060 [2018-03-28 13:15:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2018-03-28 13:15:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1295. [2018-03-28 13:15:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1295 states. [2018-03-28 13:15:53,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1305 transitions. [2018-03-28 13:15:53,667 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1305 transitions. Word has length 1100 [2018-03-28 13:15:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:53,667 INFO L459 AbstractCegarLoop]: Abstraction has 1295 states and 1305 transitions. [2018-03-28 13:15:53,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-03-28 13:15:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1305 transitions. [2018-03-28 13:15:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2018-03-28 13:15:53,675 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:53,676 INFO L355 BasicCegarLoop]: trace histogram [118, 104, 103, 103, 103, 103, 103, 103, 103, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:53,676 INFO L408 AbstractCegarLoop]: === Iteration 55 === [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]=== [2018-03-28 13:15:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash -869376943, now seen corresponding path program 33 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:53,682 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:53,887 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 52444 backedges. 21133 proven. 618 refuted. 0 times theorem prover too weak. 30693 trivial. 0 not checked. [2018-03-28 13:15:55,124 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:15:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 52444 backedges. 21133 proven. 618 refuted. 0 times theorem prover too weak. 30693 trivial. 0 not checked. [2018-03-28 13:15:56,597 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:15:56,671 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 82 [2018-03-28 13:15:56,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-03-28 13:15:56,673 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-03-28 13:15:56,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=5778, Unknown=0, NotChecked=0, Total=6642 [2018-03-28 13:15:56,673 INFO L87 Difference]: Start difference. First operand 1295 states and 1305 transitions. Second operand 82 states. [2018-03-28 13:15:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:15:58,003 INFO L93 Difference]: Finished difference Result 1506 states and 1525 transitions. [2018-03-28 13:15:58,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-03-28 13:15:58,003 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 1228 [2018-03-28 13:15:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:15:58,006 INFO L225 Difference]: With dead ends: 1506 [2018-03-28 13:15:58,006 INFO L226 Difference]: Without dead ends: 1307 [2018-03-28 13:15:58,008 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2520 GetRequests, 2347 SyntacticMatches, 29 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8221 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3252, Invalid=17918, Unknown=0, NotChecked=0, Total=21170 [2018-03-28 13:15:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2018-03-28 13:15:58,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1295. [2018-03-28 13:15:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1295 states. [2018-03-28 13:15:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1303 transitions. [2018-03-28 13:15:58,050 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1303 transitions. Word has length 1228 [2018-03-28 13:15:58,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:15:58,050 INFO L459 AbstractCegarLoop]: Abstraction has 1295 states and 1303 transitions. [2018-03-28 13:15:58,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-03-28 13:15:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1303 transitions. [2018-03-28 13:15:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1238 [2018-03-28 13:15:58,058 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:15:58,058 INFO L355 BasicCegarLoop]: trace histogram [119, 105, 104, 104, 104, 104, 104, 104, 104, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:15:58,058 INFO L408 AbstractCegarLoop]: === Iteration 56 === [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]=== [2018-03-28 13:15:58,059 INFO L82 PathProgramCache]: Analyzing trace with hash 253114958, now seen corresponding path program 34 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:15:58,064 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:15:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:15:58,266 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:15:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 53402 backedges. 12257 proven. 741 refuted. 0 times theorem prover too weak. 40404 trivial. 0 not checked. [2018-03-28 13:15:59,674 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:16:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 53402 backedges. 12257 proven. 741 refuted. 0 times theorem prover too weak. 40404 trivial. 0 not checked. [2018-03-28 13:16:01,314 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:16:01,315 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 86 [2018-03-28 13:16:01,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-03-28 13:16:01,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-03-28 13:16:01,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=6892, Unknown=0, NotChecked=0, Total=7482 [2018-03-28 13:16:01,316 INFO L87 Difference]: Start difference. First operand 1295 states and 1303 transitions. Second operand 87 states. [2018-03-28 13:16:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:16:04,513 INFO L93 Difference]: Finished difference Result 1311 states and 1318 transitions. [2018-03-28 13:16:04,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-03-28 13:16:04,513 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 1237 [2018-03-28 13:16:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:16:04,517 INFO L225 Difference]: With dead ends: 1311 [2018-03-28 13:16:04,517 INFO L226 Difference]: Without dead ends: 1310 [2018-03-28 13:16:04,518 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2543 GetRequests, 2358 SyntacticMatches, 31 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7532 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2236, Invalid=21944, Unknown=0, NotChecked=0, Total=24180 [2018-03-28 13:16:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2018-03-28 13:16:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1295. [2018-03-28 13:16:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1295 states. [2018-03-28 13:16:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1302 transitions. [2018-03-28 13:16:04,559 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1302 transitions. Word has length 1237 [2018-03-28 13:16:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:16:04,559 INFO L459 AbstractCegarLoop]: Abstraction has 1295 states and 1302 transitions. [2018-03-28 13:16:04,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-03-28 13:16:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1302 transitions. [2018-03-28 13:16:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1247 [2018-03-28 13:16:04,567 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:16:04,568 INFO L355 BasicCegarLoop]: trace histogram [120, 106, 105, 105, 105, 105, 105, 105, 105, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:16:04,568 INFO L408 AbstractCegarLoop]: === Iteration 57 === [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]=== [2018-03-28 13:16:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash 520500695, now seen corresponding path program 35 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:16:04,573 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:16:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:16:04,782 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:16:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 54369 backedges. 13104 proven. 861 refuted. 0 times theorem prover too weak. 40404 trivial. 0 not checked. [2018-03-28 13:16:06,163 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:16:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 54369 backedges. 13104 proven. 861 refuted. 0 times theorem prover too weak. 40404 trivial. 0 not checked. [2018-03-28 13:16:07,701 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:16:07,701 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 91 [2018-03-28 13:16:07,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-03-28 13:16:07,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-03-28 13:16:07,703 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=7169, Unknown=0, NotChecked=0, Total=8190 [2018-03-28 13:16:07,703 INFO L87 Difference]: Start difference. First operand 1295 states and 1302 transitions. Second operand 91 states. [2018-03-28 13:16:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:16:10,496 INFO L93 Difference]: Finished difference Result 1632 states and 1647 transitions. [2018-03-28 13:16:10,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-03-28 13:16:10,496 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 1246 [2018-03-28 13:16:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:16:10,499 INFO L225 Difference]: With dead ends: 1632 [2018-03-28 13:16:10,500 INFO L226 Difference]: Without dead ends: 1448 [2018-03-28 13:16:10,502 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2577 GetRequests, 2371 SyntacticMatches, 31 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8474 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4532, Invalid=26620, Unknown=0, NotChecked=0, Total=31152 [2018-03-28 13:16:10,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2018-03-28 13:16:10,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1432. [2018-03-28 13:16:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-03-28 13:16:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1439 transitions. [2018-03-28 13:16:10,549 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1439 transitions. Word has length 1246 [2018-03-28 13:16:10,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:16:10,549 INFO L459 AbstractCegarLoop]: Abstraction has 1432 states and 1439 transitions. [2018-03-28 13:16:10,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-03-28 13:16:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1439 transitions. [2018-03-28 13:16:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1258 [2018-03-28 13:16:10,557 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:16:10,557 INFO L355 BasicCegarLoop]: trace histogram [119, 104, 104, 104, 104, 104, 104, 104, 104, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:16:10,557 INFO L408 AbstractCegarLoop]: === Iteration 58 === [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]=== [2018-03-28 13:16:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1805398368, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:16:10,566 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:16:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:16:10,773 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:16:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 53454 backedges. 12280 proven. 728 refuted. 0 times theorem prover too weak. 40446 trivial. 0 not checked. [2018-03-28 13:16:12,144 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:16:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 53454 backedges. 12280 proven. 728 refuted. 0 times theorem prover too weak. 40446 trivial. 0 not checked. [2018-03-28 13:16:13,754 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:16:13,754 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 88 [2018-03-28 13:16:13,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-03-28 13:16:13,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-03-28 13:16:13,756 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=986, Invalid=6670, Unknown=0, NotChecked=0, Total=7656 [2018-03-28 13:16:13,756 INFO L87 Difference]: Start difference. First operand 1432 states and 1439 transitions. Second operand 88 states. [2018-03-28 13:16:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:16:15,435 INFO L93 Difference]: Finished difference Result 1634 states and 1646 transitions. [2018-03-28 13:16:15,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-03-28 13:16:15,435 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 1257 [2018-03-28 13:16:15,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:16:15,439 INFO L225 Difference]: With dead ends: 1634 [2018-03-28 13:16:15,439 INFO L226 Difference]: Without dead ends: 1444 [2018-03-28 13:16:15,440 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2583 GetRequests, 2397 SyntacticMatches, 31 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9574 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3740, Invalid=20752, Unknown=0, NotChecked=0, Total=24492 [2018-03-28 13:16:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2018-03-28 13:16:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1432. [2018-03-28 13:16:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-03-28 13:16:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1437 transitions. [2018-03-28 13:16:15,492 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1437 transitions. Word has length 1257 [2018-03-28 13:16:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:16:15,493 INFO L459 AbstractCegarLoop]: Abstraction has 1432 states and 1437 transitions. [2018-03-28 13:16:15,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-03-28 13:16:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1437 transitions. [2018-03-28 13:16:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2018-03-28 13:16:15,501 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:16:15,502 INFO L355 BasicCegarLoop]: trace histogram [120, 105, 105, 105, 105, 105, 105, 105, 105, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:16:15,502 INFO L408 AbstractCegarLoop]: === Iteration 59 === [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]=== [2018-03-28 13:16:15,502 INFO L82 PathProgramCache]: Analyzing trace with hash 224635817, now seen corresponding path program 6 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:16:15,509 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:16:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:16:15,759 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:16:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 54420 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 53445 trivial. 0 not checked. [2018-03-28 13:16:16,522 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:16:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 54420 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 53445 trivial. 0 not checked. [2018-03-28 13:16:17,555 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:16:17,555 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-03-28 13:16:17,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-03-28 13:16:17,556 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-03-28 13:16:17,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2018-03-28 13:16:17,556 INFO L87 Difference]: Start difference. First operand 1432 states and 1437 transitions. Second operand 64 states. Received shutdown request... [2018-03-28 13:16:18,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-03-28 13:16:18,664 WARN L519 AbstractCegarLoop]: Verification canceled [2018-03-28 13:16:18,667 WARN L197 ceAbstractionStarter]: Timeout [2018-03-28 13:16:18,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.03 01:16:18 BoogieIcfgContainer [2018-03-28 13:16:18,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-03-28 13:16:18,668 INFO L168 Benchmark]: Toolchain (without parser) took 124836.59 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 250.2 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 977.8 MB. Max. memory is 5.3 GB. [2018-03-28 13:16:18,669 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 306.7 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-03-28 13:16:18,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.83 ms. Allocated memory is still 306.7 MB. Free memory was 250.2 MB in the beginning and 240.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-03-28 13:16:18,670 INFO L168 Benchmark]: Boogie Preprocessor took 35.37 ms. Allocated memory is still 306.7 MB. Free memory was 240.2 MB in the beginning and 239.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-03-28 13:16:18,670 INFO L168 Benchmark]: RCFGBuilder took 360.19 ms. Allocated memory was 306.7 MB in the beginning and 464.5 MB in the end (delta: 157.8 MB). Free memory was 238.2 MB in the beginning and 430.2 MB in the end (delta: -192.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 5.3 GB. [2018-03-28 13:16:18,670 INFO L168 Benchmark]: TraceAbstraction took 124217.16 ms. Allocated memory was 464.5 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 430.2 MB in the beginning and 1.3 GB in the end (delta: -837.7 MB). Peak memory consumption was 999.9 MB. Max. memory is 5.3 GB. [2018-03-28 13:16:18,672 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 306.7 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 217.83 ms. Allocated memory is still 306.7 MB. Free memory was 250.2 MB in the beginning and 240.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 35.37 ms. Allocated memory is still 306.7 MB. Free memory was 240.2 MB in the beginning and 239.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 360.19 ms. Allocated memory was 306.7 MB in the beginning and 464.5 MB in the end (delta: 157.8 MB). Free memory was 238.2 MB in the beginning and 430.2 MB in the end (delta: -192.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 5.3 GB. * TraceAbstraction took 124217.16 ms. Allocated memory was 464.5 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 430.2 MB in the beginning and 1.3 GB in the end (delta: -837.7 MB). Peak memory consumption was 999.9 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 26). Cancelled while BasicCegarLoop was constructing difference of abstraction (1432states) and interpolant automaton (currently 82 states, 64 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (1432states) and interpolant automaton (currently 82 states, 64 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 26). Cancelled while BasicCegarLoop was constructing difference of abstraction (1432states) and interpolant automaton (currently 82 states, 64 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 20). Cancelled while BasicCegarLoop was constructing difference of abstraction (1432states) and interpolant automaton (currently 82 states, 64 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 23). Cancelled while BasicCegarLoop was constructing difference of abstraction (1432states) and interpolant automaton (currently 82 states, 64 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 15). Cancelled while BasicCegarLoop was constructing difference of abstraction (1432states) and interpolant automaton (currently 82 states, 64 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 15). Cancelled while BasicCegarLoop was constructing difference of abstraction (1432states) and interpolant automaton (currently 82 states, 64 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 15). Cancelled while BasicCegarLoop was constructing difference of abstraction (1432states) and interpolant automaton (currently 82 states, 64 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 117 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 8 error locations. TIMEOUT Result, 124.1s OverallTime, 59 OverallIterations, 120 TraceHistogramMax, 57.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4952 SDtfs, 13693 SDslu, 73532 SDs, 0 SdLazy, 67598 SolverSat, 3028 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54400 GetRequests, 49403 SyntacticMatches, 813 SemanticMatches, 4183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137706 ImplicationChecksByTransitivity, 63.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1432occurred in iteration=57, 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: 1.3s AutomataMinimizationTime, 58 MinimizatonAttempts, 785 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 57.3s InterpolantComputationTime, 26249 NumberOfCodeBlocks, 26249 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 52380 ConstructedInterpolants, 983 QuantifiedInterpolants, 84007490 SizeOfPredicates, 1423 NumberOfNonLiveVariables, 51360 ConjunctsInSsa, 1854 ConjunctsInUnsatCore, 118 InterpolantComputations, 18 PerfectInterpolantSequences, 1326472/1352794 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_true-valid-memsafety.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf_AutomizerC.xml/Csv-Benchmark-0-2018-03-28_13-16-18-678.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_true-valid-memsafety.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-03-28_13-16-18-678.csv Completed graceful shutdown