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/ArraysOfVariableLength5_true-valid-memsafety.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cf7e2d-m [2018-03-29 21:25:28,339 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-03-29 21:25:28,340 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-03-29 21:25:28,353 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-03-29 21:25:28,354 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-03-29 21:25:28,354 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-03-29 21:25:28,355 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-03-29 21:25:28,357 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-03-29 21:25:28,359 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-03-29 21:25:28,360 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-03-29 21:25:28,361 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-03-29 21:25:28,361 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-03-29 21:25:28,362 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-03-29 21:25:28,363 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-03-29 21:25:28,364 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-03-29 21:25:28,366 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-03-29 21:25:28,368 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-03-29 21:25:28,370 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-03-29 21:25:28,371 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-03-29 21:25:28,373 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-03-29 21:25:28,375 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-03-29 21:25:28,375 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-03-29 21:25:28,376 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-03-29 21:25:28,377 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-03-29 21:25:28,377 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-03-29 21:25:28,379 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-03-29 21:25:28,379 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-03-29 21:25:28,380 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-03-29 21:25:28,381 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-03-29 21:25:28,381 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-03-29 21:25:28,381 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-03-29 21:25:28,382 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 [2018-03-29 21:25:28,406 INFO L110 SettingsManager]: Loading preferences was successful [2018-03-29 21:25:28,406 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-03-29 21:25:28,406 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-03-29 21:25:28,407 INFO L133 SettingsManager]: * ultimate.logging.details=de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation=DEBUG; [2018-03-29 21:25:28,407 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-03-29 21:25:28,407 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-03-29 21:25:28,408 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-03-29 21:25:28,408 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-03-29 21:25:28,408 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-03-29 21:25:28,408 INFO L131 SettingsManager]: Preferences of LTL2Aut differ from their defaults: [2018-03-29 21:25:28,409 INFO L133 SettingsManager]: * Property to check=[] a a: x > 42 [2018-03-29 21:25:28,409 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-03-29 21:25:28,409 INFO L133 SettingsManager]: * sizeof long=4 [2018-03-29 21:25:28,409 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-03-29 21:25:28,409 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-03-29 21:25:28,409 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-03-29 21:25:28,409 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-03-29 21:25:28,410 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-03-29 21:25:28,410 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-03-29 21:25:28,410 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-03-29 21:25:28,410 INFO L133 SettingsManager]: * sizeof long double=12 [2018-03-29 21:25:28,410 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-03-29 21:25:28,410 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-03-29 21:25:28,411 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-03-29 21:25:28,411 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-03-29 21:25:28,411 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-03-29 21:25:28,411 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-03-29 21:25:28,411 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-03-29 21:25:28,412 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-03-29 21:25:28,412 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-03-29 21:25:28,412 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-03-29 21:25:28,412 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-29 21:25:28,412 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-03-29 21:25:28,413 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-03-29 21:25:28,413 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-03-29 21:25:28,413 INFO L131 SettingsManager]: Preferences of Boogie Printer differ from their defaults: [2018-03-29 21:25:28,413 INFO L133 SettingsManager]: * Dump path:=C:\Users\alex\AppData\Local\Temp\ [2018-03-29 21:25:28,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-03-29 21:25:28,456 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-03-29 21:25:28,458 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-03-29 21:25:28,460 INFO L271 PluginConnector]: Initializing CDTParser... [2018-03-29 21:25:28,460 INFO L276 PluginConnector]: CDTParser initialized [2018-03-29 21:25:28,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength5_true-valid-memsafety.c [2018-03-29 21:25:28,754 INFO L225 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG9a695d64b [2018-03-29 21:25:28,887 INFO L287 CDTParser]: IsIndexed: true [2018-03-29 21:25:28,887 INFO L288 CDTParser]: Found 1 translation units. [2018-03-29 21:25:28,887 INFO L168 CDTParser]: Scanning ArraysOfVariableLength5_true-valid-memsafety.c [2018-03-29 21:25:28,888 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-03-29 21:25:28,888 INFO L215 ultiparseSymbolTable]: [2018-03-29 21:25:28,888 INFO L218 ultiparseSymbolTable]: Function table: [2018-03-29 21:25:28,888 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__foo ('foo') in ArraysOfVariableLength5_true-valid-memsafety.c [2018-03-29 21:25:28,888 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in ArraysOfVariableLength5_true-valid-memsafety.c [2018-03-29 21:25:28,889 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-03-29 21:25:28,889 INFO L233 ultiparseSymbolTable]: [2018-03-29 21:25:28,905 INFO L330 CDTParser]: Deleted temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG9a695d64b [2018-03-29 21:25:28,908 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-03-29 21:25:28,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-03-29 21:25:28,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-03-29 21:25:28,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-03-29 21:25:28,918 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-03-29 21:25:28,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.03 09:25:28" (1/1) ... [2018-03-29 21:25:28,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25545638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:28, skipping insertion in model container [2018-03-29 21:25:28,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.03 09:25:28" (1/1) ... [2018-03-29 21:25:28,935 INFO L167 Dispatcher]: Using SV-COMP mode [2018-03-29 21:25:28,947 INFO L167 Dispatcher]: Using SV-COMP mode [2018-03-29 21:25:29,074 INFO L175 PostProcessor]: Settings: Checked method=main [2018-03-29 21:25:29,097 INFO L175 PostProcessor]: Settings: Checked method=main [2018-03-29 21:25:29,101 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 9 non ball SCCs. Number of states in SCCs 9. [2018-03-29 21:25:29,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29 WrapperNode [2018-03-29 21:25:29,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-03-29 21:25:29,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-03-29 21:25:29,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-03-29 21:25:29,112 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-03-29 21:25:29,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29" (1/1) ... [2018-03-29 21:25:29,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29" (1/1) ... [2018-03-29 21:25:29,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29" (1/1) ... [2018-03-29 21:25:29,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29" (1/1) ... [2018-03-29 21:25:29,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29" (1/1) ... [2018-03-29 21:25:29,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29" (1/1) ... [2018-03-29 21:25:29,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29" (1/1) ... [2018-03-29 21:25:29,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-03-29 21:25:29,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-03-29 21:25:29,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-03-29 21:25:29,147 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-03-29 21:25:29,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29" (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 [2018-03-29 21:25:29,212 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-03-29 21:25:29,212 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-03-29 21:25:29,212 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__foo [2018-03-29 21:25:29,212 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-03-29 21:25:29,212 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__foo [2018-03-29 21:25:29,212 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-03-29 21:25:29,212 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-03-29 21:25:29,213 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-03-29 21:25:29,213 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-03-29 21:25:29,213 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-03-29 21:25:29,213 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-03-29 21:25:29,213 INFO L128 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-03-29 21:25:29,213 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-03-29 21:25:29,488 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-03-29 21:25:29,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.03 09:25:29 BoogieIcfgContainer [2018-03-29 21:25:29,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-03-29 21:25:29,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-03-29 21:25:29,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-03-29 21:25:29,493 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-03-29 21:25:29,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.03 09:25:28" (1/3) ... [2018-03-29 21:25:29,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4838a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.03 09:25:29, skipping insertion in model container [2018-03-29 21:25:29,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.03 09:25:29" (2/3) ... [2018-03-29 21:25:29,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4838a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.03 09:25:29, skipping insertion in model container [2018-03-29 21:25:29,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.03 09:25:29" (3/3) ... [2018-03-29 21:25:29,495 INFO L107 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5_true-valid-memsafety.c [2018-03-29 21:25:29,502 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-03-29 21:25:29,509 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-03-29 21:25:29,560 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-03-29 21:25:29,561 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-03-29 21:25:29,561 INFO L370 AbstractCegarLoop]: Hoare is true [2018-03-29 21:25:29,561 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-03-29 21:25:29,561 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-03-29 21:25:29,561 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-03-29 21:25:29,562 INFO L374 AbstractCegarLoop]: Difference is false [2018-03-29 21:25:29,562 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-03-29 21:25:29,562 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-03-29 21:25:29,563 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-03-29 21:25:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-03-29 21:25:29,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-03-29 21:25:29,581 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:29,582 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:25:29,582 INFO L408 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:29,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1751798805, 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 [2018-03-29 21:25:29,599 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:29,639 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:29,687 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:29,726 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-29 21:25:29,726 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2018-03-29 21:25:29,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-03-29 21:25:29,738 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-03-29 21:25:29,738 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-29 21:25:29,740 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 4 states. [2018-03-29 21:25:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:29,875 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2018-03-29 21:25:29,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-03-29 21:25:29,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-03-29 21:25:29,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:29,888 INFO L225 Difference]: With dead ends: 141 [2018-03-29 21:25:29,888 INFO L226 Difference]: Without dead ends: 84 [2018-03-29 21:25:29,892 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-29 21:25:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-03-29 21:25:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2018-03-29 21:25:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-03-29 21:25:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2018-03-29 21:25:29,936 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 16 [2018-03-29 21:25:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:29,936 INFO L459 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2018-03-29 21:25:29,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-03-29 21:25:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2018-03-29 21:25:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-03-29 21:25:29,938 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:29,938 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] [2018-03-29 21:25:29,938 INFO L408 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:29,938 INFO L82 PathProgramCache]: Analyzing trace with hash -177512800, 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 [2018-03-29 21:25:29,950 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:29,974 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:29,985 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:30,061 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-29 21:25:30,061 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2018-03-29 21:25:30,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-03-29 21:25:30,063 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-03-29 21:25:30,064 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-29 21:25:30,064 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 4 states. [2018-03-29 21:25:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:30,109 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2018-03-29 21:25:30,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-03-29 21:25:30,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-03-29 21:25:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:30,112 INFO L225 Difference]: With dead ends: 82 [2018-03-29 21:25:30,112 INFO L226 Difference]: Without dead ends: 81 [2018-03-29 21:25:30,113 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-29 21:25:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-03-29 21:25:30,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2018-03-29 21:25:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-03-29 21:25:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2018-03-29 21:25:30,120 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 25 [2018-03-29 21:25:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:30,120 INFO L459 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2018-03-29 21:25:30,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-03-29 21:25:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2018-03-29 21:25:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-03-29 21:25:30,121 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:30,122 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, 1] [2018-03-29 21:25:30,122 INFO L408 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1207929453, 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 [2018-03-29 21:25:30,140 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:30,163 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:30,210 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:30,293 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-29 21:25:30,293 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2018-03-29 21:25:30,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-03-29 21:25:30,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-03-29 21:25:30,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-03-29 21:25:30,295 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 7 states. [2018-03-29 21:25:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:30,399 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2018-03-29 21:25:30,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-03-29 21:25:30,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-03-29 21:25:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:30,402 INFO L225 Difference]: With dead ends: 150 [2018-03-29 21:25:30,402 INFO L226 Difference]: Without dead ends: 95 [2018-03-29 21:25:30,403 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-03-29 21:25:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-03-29 21:25:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2018-03-29 21:25:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-03-29 21:25:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2018-03-29 21:25:30,414 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 26 [2018-03-29 21:25:30,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:30,415 INFO L459 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2018-03-29 21:25:30,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-03-29 21:25:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2018-03-29 21:25:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-03-29 21:25:30,417 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:30,417 INFO L355 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2018-03-29 21:25:30,417 INFO L408 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:30,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1833243520, 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 [2018-03-29 21:25:30,427 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:30,451 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:30,502 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:30,612 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-29 21:25:30,612 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-03-29 21:25:30,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-03-29 21:25:30,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-03-29 21:25:30,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-03-29 21:25:30,613 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 9 states. [2018-03-29 21:25:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:30,725 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2018-03-29 21:25:30,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-03-29 21:25:30,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-03-29 21:25:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:30,727 INFO L225 Difference]: With dead ends: 97 [2018-03-29 21:25:30,727 INFO L226 Difference]: Without dead ends: 96 [2018-03-29 21:25:30,728 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-03-29 21:25:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-03-29 21:25:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2018-03-29 21:25:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-03-29 21:25:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2018-03-29 21:25:30,738 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 37 [2018-03-29 21:25:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:30,739 INFO L459 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2018-03-29 21:25:30,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-03-29 21:25:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2018-03-29 21:25:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-03-29 21:25:30,741 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:30,741 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, 1, 1, 1] [2018-03-29 21:25:30,741 INFO L408 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash 936767290, 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 [2018-03-29 21:25:30,748 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:30,767 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:30,794 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:30,870 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:30,871 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-03-29 21:25:30,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-03-29 21:25:30,871 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-03-29 21:25:30,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-03-29 21:25:30,872 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 8 states. [2018-03-29 21:25:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:30,982 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2018-03-29 21:25:30,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-29 21:25:30,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2018-03-29 21:25:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:30,984 INFO L225 Difference]: With dead ends: 130 [2018-03-29 21:25:30,984 INFO L226 Difference]: Without dead ends: 110 [2018-03-29 21:25:30,985 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-03-29 21:25:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-03-29 21:25:30,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-03-29 21:25:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-03-29 21:25:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2018-03-29 21:25:30,995 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 44 [2018-03-29 21:25:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:30,995 INFO L459 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2018-03-29 21:25:30,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-03-29 21:25:30,995 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2018-03-29 21:25:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-03-29 21:25:30,997 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:30,997 INFO L355 BasicCegarLoop]: trace histogram [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, 1, 1] [2018-03-29 21:25:30,997 INFO L408 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1632518168, 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 [2018-03-29 21:25:31,005 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:31,028 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:31,053 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 [2018-03-29 21:25:31,055 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-29 21:25:31,056 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-29 21:25:31,057 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-03-29 21:25:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-29 21:25:31,125 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-29 21:25:31,178 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:31,178 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2018-03-29 21:25:31,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-03-29 21:25:31,179 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-03-29 21:25:31,179 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-03-29 21:25:31,179 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 7 states. [2018-03-29 21:25:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:31,291 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2018-03-29 21:25:31,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-03-29 21:25:31,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2018-03-29 21:25:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:31,293 INFO L225 Difference]: With dead ends: 100 [2018-03-29 21:25:31,293 INFO L226 Difference]: Without dead ends: 99 [2018-03-29 21:25:31,294 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-03-29 21:25:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-03-29 21:25:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-03-29 21:25:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-03-29 21:25:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2018-03-29 21:25:31,301 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 47 [2018-03-29 21:25:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:31,301 INFO L459 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2018-03-29 21:25:31,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-03-29 21:25:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2018-03-29 21:25:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-03-29 21:25:31,302 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:31,302 INFO L355 BasicCegarLoop]: trace histogram [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, 1, 1] [2018-03-29 21:25:31,302 INFO L408 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:31,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1632518167, 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 [2018-03-29 21:25:31,312 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:31,333 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:31,338 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 [2018-03-29 21:25:31,338 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-29 21:25:31,343 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-29 21:25:31,343 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-29 21:25:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-29 21:25:31,407 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-03-29 21:25:31,483 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:31,483 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2018-03-29 21:25:31,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-03-29 21:25:31,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-03-29 21:25:31,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-03-29 21:25:31,484 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 13 states. [2018-03-29 21:25:31,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:31,619 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2018-03-29 21:25:31,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-29 21:25:31,620 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-03-29 21:25:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:31,621 INFO L225 Difference]: With dead ends: 108 [2018-03-29 21:25:31,622 INFO L226 Difference]: Without dead ends: 107 [2018-03-29 21:25:31,622 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2018-03-29 21:25:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-03-29 21:25:31,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-03-29 21:25:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-03-29 21:25:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2018-03-29 21:25:31,633 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 47 [2018-03-29 21:25:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:31,633 INFO L459 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2018-03-29 21:25:31,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-03-29 21:25:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2018-03-29 21:25:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-03-29 21:25:31,634 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:31,634 INFO L355 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:25:31,635 INFO L408 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:31,635 INFO L82 PathProgramCache]: Analyzing trace with hash 275780314, 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 [2018-03-29 21:25:31,641 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:31,661 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:31,727 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-29 21:25:31,813 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:31,813 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-03-29 21:25:31,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-03-29 21:25:31,814 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-03-29 21:25:31,814 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-03-29 21:25:31,814 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 13 states. [2018-03-29 21:25:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:31,989 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2018-03-29 21:25:31,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-03-29 21:25:31,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-03-29 21:25:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:31,990 INFO L225 Difference]: With dead ends: 192 [2018-03-29 21:25:31,990 INFO L226 Difference]: Without dead ends: 130 [2018-03-29 21:25:31,991 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2018-03-29 21:25:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-03-29 21:25:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2018-03-29 21:25:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-03-29 21:25:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2018-03-29 21:25:32,000 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 55 [2018-03-29 21:25:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:32,000 INFO L459 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2018-03-29 21:25:32,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-03-29 21:25:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2018-03-29 21:25:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-03-29 21:25:32,002 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:32,002 INFO L355 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-03-29 21:25:32,002 INFO L408 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1236269915, now seen corresponding path program 2 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 [2018-03-29 21:25:32,008 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:32,037 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-03-29 21:25:32,086 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-03-29 21:25:32,209 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-29 21:25:32,210 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2018-03-29 21:25:32,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-03-29 21:25:32,211 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-03-29 21:25:32,211 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-03-29 21:25:32,211 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand 10 states. [2018-03-29 21:25:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:32,331 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2018-03-29 21:25:32,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-03-29 21:25:32,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2018-03-29 21:25:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:32,333 INFO L225 Difference]: With dead ends: 201 [2018-03-29 21:25:32,333 INFO L226 Difference]: Without dead ends: 133 [2018-03-29 21:25:32,334 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-03-29 21:25:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-03-29 21:25:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-03-29 21:25:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-03-29 21:25:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2018-03-29 21:25:32,345 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 76 [2018-03-29 21:25:32,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:32,345 INFO L459 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2018-03-29 21:25:32,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-03-29 21:25:32,345 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2018-03-29 21:25:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-03-29 21:25:32,347 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:32,347 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:25:32,347 INFO L408 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:32,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1979655572, now seen corresponding path program 3 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 [2018-03-29 21:25:32,365 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:32,388 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-03-29 21:25:32,404 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-03-29 21:25:32,461 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:32,461 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-03-29 21:25:32,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-03-29 21:25:32,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-03-29 21:25:32,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-03-29 21:25:32,462 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 8 states. [2018-03-29 21:25:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:32,539 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2018-03-29 21:25:32,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-29 21:25:32,540 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2018-03-29 21:25:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:32,541 INFO L225 Difference]: With dead ends: 150 [2018-03-29 21:25:32,541 INFO L226 Difference]: Without dead ends: 149 [2018-03-29 21:25:32,542 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-03-29 21:25:32,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-03-29 21:25:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2018-03-29 21:25:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-03-29 21:25:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2018-03-29 21:25:32,549 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 85 [2018-03-29 21:25:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:32,550 INFO L459 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2018-03-29 21:25:32,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-03-29 21:25:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2018-03-29 21:25:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-03-29 21:25:32,551 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:32,551 INFO L355 BasicCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1] [2018-03-29 21:25:32,551 INFO L408 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:32,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1239780640, 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 [2018-03-29 21:25:32,557 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:32,581 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:32,585 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 [2018-03-29 21:25:32,585 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-29 21:25:32,589 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-29 21:25:32,589 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-29 21:25:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-03-29 21:25:32,723 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-03-29 21:25:32,929 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:32,930 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2018-03-29 21:25:32,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-03-29 21:25:32,930 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-03-29 21:25:32,931 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-03-29 21:25:32,931 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 17 states. [2018-03-29 21:25:33,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:33,238 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2018-03-29 21:25:33,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-03-29 21:25:33,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 86 [2018-03-29 21:25:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:33,240 INFO L225 Difference]: With dead ends: 144 [2018-03-29 21:25:33,240 INFO L226 Difference]: Without dead ends: 143 [2018-03-29 21:25:33,241 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2018-03-29 21:25:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-03-29 21:25:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2018-03-29 21:25:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-03-29 21:25:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2018-03-29 21:25:33,250 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 86 [2018-03-29 21:25:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:33,250 INFO L459 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2018-03-29 21:25:33,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-03-29 21:25:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2018-03-29 21:25:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-03-29 21:25:33,252 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:33,252 INFO L355 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2018-03-29 21:25:33,252 INFO L408 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:33,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1009828404, now seen corresponding path program 4 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 [2018-03-29 21:25:33,260 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:33,288 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 91 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-03-29 21:25:33,403 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 91 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-03-29 21:25:33,522 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:33,522 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-03-29 21:25:33,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-03-29 21:25:33,522 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-03-29 21:25:33,523 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-03-29 21:25:33,523 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand 19 states. [2018-03-29 21:25:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:33,809 INFO L93 Difference]: Finished difference Result 256 states and 269 transitions. [2018-03-29 21:25:33,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-29 21:25:33,809 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 103 [2018-03-29 21:25:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:33,810 INFO L225 Difference]: With dead ends: 256 [2018-03-29 21:25:33,810 INFO L226 Difference]: Without dead ends: 184 [2018-03-29 21:25:33,811 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2018-03-29 21:25:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-03-29 21:25:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2018-03-29 21:25:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-03-29 21:25:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2018-03-29 21:25:33,823 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 103 [2018-03-29 21:25:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:33,823 INFO L459 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2018-03-29 21:25:33,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-03-29 21:25:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2018-03-29 21:25:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-03-29 21:25:33,825 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:33,825 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, 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, 1, 1] [2018-03-29 21:25:33,825 INFO L408 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1032799290, now seen corresponding path program 1 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 [2018-03-29 21:25:33,835 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:33,867 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-03-29 21:25:33,923 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-03-29 21:25:34,056 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:34,057 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-03-29 21:25:34,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-29 21:25:34,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-29 21:25:34,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-03-29 21:25:34,058 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 16 states. [2018-03-29 21:25:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:34,319 INFO L93 Difference]: Finished difference Result 256 states and 266 transitions. [2018-03-29 21:25:34,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-03-29 21:25:34,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2018-03-29 21:25:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:34,320 INFO L225 Difference]: With dead ends: 256 [2018-03-29 21:25:34,320 INFO L226 Difference]: Without dead ends: 178 [2018-03-29 21:25:34,321 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 187 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2018-03-29 21:25:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-03-29 21:25:34,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2018-03-29 21:25:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-03-29 21:25:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2018-03-29 21:25:34,329 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 104 [2018-03-29 21:25:34,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:34,329 INFO L459 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2018-03-29 21:25:34,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-29 21:25:34,330 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2018-03-29 21:25:34,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-03-29 21:25:34,330 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:34,331 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, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:25:34,331 INFO L408 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:34,331 INFO L82 PathProgramCache]: Analyzing trace with hash -395053783, now seen corresponding path program 2 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 [2018-03-29 21:25:34,338 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:34,363 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-03-29 21:25:34,407 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-03-29 21:25:34,511 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:34,511 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-03-29 21:25:34,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-29 21:25:34,512 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-29 21:25:34,512 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-03-29 21:25:34,512 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 16 states. [2018-03-29 21:25:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:34,704 INFO L93 Difference]: Finished difference Result 239 states and 250 transitions. [2018-03-29 21:25:34,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-29 21:25:34,705 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 113 [2018-03-29 21:25:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:34,706 INFO L225 Difference]: With dead ends: 239 [2018-03-29 21:25:34,706 INFO L226 Difference]: Without dead ends: 219 [2018-03-29 21:25:34,707 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2018-03-29 21:25:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-03-29 21:25:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 209. [2018-03-29 21:25:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-03-29 21:25:34,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 216 transitions. [2018-03-29 21:25:34,717 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 216 transitions. Word has length 113 [2018-03-29 21:25:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:34,717 INFO L459 AbstractCegarLoop]: Abstraction has 209 states and 216 transitions. [2018-03-29 21:25:34,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-29 21:25:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 216 transitions. [2018-03-29 21:25:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-03-29 21:25:34,719 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:34,719 INFO L355 BasicCegarLoop]: trace histogram [10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 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, 1, 1, 1] [2018-03-29 21:25:34,720 INFO L408 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:34,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1348959851, now seen corresponding path program 5 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 [2018-03-29 21:25:34,729 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:34,764 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 165 proven. 48 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-03-29 21:25:34,906 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 165 proven. 48 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-03-29 21:25:35,044 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:35,044 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2018-03-29 21:25:35,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-03-29 21:25:35,045 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-03-29 21:25:35,045 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-03-29 21:25:35,045 INFO L87 Difference]: Start difference. First operand 209 states and 216 transitions. Second operand 25 states. [2018-03-29 21:25:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:35,426 INFO L93 Difference]: Finished difference Result 359 states and 374 transitions. [2018-03-29 21:25:35,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-03-29 21:25:35,427 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 142 [2018-03-29 21:25:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:35,429 INFO L225 Difference]: With dead ends: 359 [2018-03-29 21:25:35,429 INFO L226 Difference]: Without dead ends: 257 [2018-03-29 21:25:35,431 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2018-03-29 21:25:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-03-29 21:25:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 246. [2018-03-29 21:25:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-03-29 21:25:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 253 transitions. [2018-03-29 21:25:35,444 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 253 transitions. Word has length 142 [2018-03-29 21:25:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:35,445 INFO L459 AbstractCegarLoop]: Abstraction has 246 states and 253 transitions. [2018-03-29 21:25:35,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-03-29 21:25:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 253 transitions. [2018-03-29 21:25:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-03-29 21:25:35,446 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:35,446 INFO L355 BasicCegarLoop]: trace histogram [13, 9, 8, 8, 8, 8, 8, 8, 8, 5, 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, 1, 1, 1] [2018-03-29 21:25:35,446 INFO L408 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:35,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1069810260, now seen corresponding path program 6 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 [2018-03-29 21:25:35,453 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:35,489 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 384 proven. 13 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-03-29 21:25:35,639 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 384 proven. 13 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-03-29 21:25:35,907 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:35,907 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-03-29 21:25:35,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-03-29 21:25:35,908 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-03-29 21:25:35,908 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-03-29 21:25:35,908 INFO L87 Difference]: Start difference. First operand 246 states and 253 transitions. Second operand 22 states. [2018-03-29 21:25:36,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:36,327 INFO L93 Difference]: Finished difference Result 368 states and 382 transitions. [2018-03-29 21:25:36,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-03-29 21:25:36,327 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 181 [2018-03-29 21:25:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:36,328 INFO L225 Difference]: With dead ends: 368 [2018-03-29 21:25:36,328 INFO L226 Difference]: Without dead ends: 260 [2018-03-29 21:25:36,330 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 333 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2018-03-29 21:25:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-03-29 21:25:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 246. [2018-03-29 21:25:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-03-29 21:25:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2018-03-29 21:25:36,343 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 181 [2018-03-29 21:25:36,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:36,343 INFO L459 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2018-03-29 21:25:36,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-03-29 21:25:36,344 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2018-03-29 21:25:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-03-29 21:25:36,345 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:36,345 INFO L355 BasicCegarLoop]: trace histogram [14, 10, 9, 9, 9, 9, 9, 9, 9, 5, 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, 1, 1, 1] [2018-03-29 21:25:36,345 INFO L408 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:36,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1383491525, now seen corresponding path program 7 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 [2018-03-29 21:25:36,354 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:36,394 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 212 proven. 36 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2018-03-29 21:25:36,432 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 212 proven. 36 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2018-03-29 21:25:36,540 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:36,540 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-03-29 21:25:36,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-29 21:25:36,541 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-29 21:25:36,541 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-03-29 21:25:36,541 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 16 states. [2018-03-29 21:25:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:36,838 INFO L93 Difference]: Finished difference Result 303 states and 323 transitions. [2018-03-29 21:25:36,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-29 21:25:36,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 190 [2018-03-29 21:25:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:36,841 INFO L225 Difference]: With dead ends: 303 [2018-03-29 21:25:36,841 INFO L226 Difference]: Without dead ends: 302 [2018-03-29 21:25:36,843 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2018-03-29 21:25:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-03-29 21:25:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 281. [2018-03-29 21:25:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-03-29 21:25:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 293 transitions. [2018-03-29 21:25:36,860 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 293 transitions. Word has length 190 [2018-03-29 21:25:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:36,860 INFO L459 AbstractCegarLoop]: Abstraction has 281 states and 293 transitions. [2018-03-29 21:25:36,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-29 21:25:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 293 transitions. [2018-03-29 21:25:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-03-29 21:25:36,862 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:36,862 INFO L355 BasicCegarLoop]: trace histogram [14, 10, 10, 9, 9, 9, 9, 9, 9, 5, 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, 1, 1, 1] [2018-03-29 21:25:36,862 INFO L408 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:36,862 INFO L82 PathProgramCache]: Analyzing trace with hash -61435633, now seen corresponding path program 2 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 [2018-03-29 21:25:36,872 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:36,929 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:36,936 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 [2018-03-29 21:25:36,937 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-29 21:25:36,962 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-29 21:25:36,962 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-29 21:25:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 238 proven. 47 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-03-29 21:25:37,380 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 238 proven. 47 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-03-29 21:25:37,690 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:37,690 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-03-29 21:25:37,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-03-29 21:25:37,690 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-03-29 21:25:37,691 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2018-03-29 21:25:37,691 INFO L87 Difference]: Start difference. First operand 281 states and 293 transitions. Second operand 25 states. [2018-03-29 21:25:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:38,551 INFO L93 Difference]: Finished difference Result 295 states and 315 transitions. [2018-03-29 21:25:38,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-03-29 21:25:38,551 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 191 [2018-03-29 21:25:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:38,552 INFO L225 Difference]: With dead ends: 295 [2018-03-29 21:25:38,553 INFO L226 Difference]: Without dead ends: 294 [2018-03-29 21:25:38,553 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 352 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2018-03-29 21:25:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-03-29 21:25:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 282. [2018-03-29 21:25:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-03-29 21:25:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 291 transitions. [2018-03-29 21:25:38,567 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 291 transitions. Word has length 191 [2018-03-29 21:25:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:38,568 INFO L459 AbstractCegarLoop]: Abstraction has 282 states and 291 transitions. [2018-03-29 21:25:38,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-03-29 21:25:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 291 transitions. [2018-03-29 21:25:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-03-29 21:25:38,570 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:38,570 INFO L355 BasicCegarLoop]: trace histogram [18, 14, 13, 13, 13, 13, 13, 13, 13, 5, 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, 1, 1, 1] [2018-03-29 21:25:38,570 INFO L408 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:38,570 INFO L82 PathProgramCache]: Analyzing trace with hash -892455803, now seen corresponding path program 8 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 [2018-03-29 21:25:38,579 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:38,622 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 660 proven. 86 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-03-29 21:25:38,820 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 660 proven. 86 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-03-29 21:25:39,066 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:39,066 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2018-03-29 21:25:39,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-03-29 21:25:39,067 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-03-29 21:25:39,067 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2018-03-29 21:25:39,068 INFO L87 Difference]: Start difference. First operand 282 states and 291 transitions. Second operand 31 states. [2018-03-29 21:25:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:39,597 INFO L93 Difference]: Finished difference Result 466 states and 485 transitions. [2018-03-29 21:25:39,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-03-29 21:25:39,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 226 [2018-03-29 21:25:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:39,601 INFO L225 Difference]: With dead ends: 466 [2018-03-29 21:25:39,601 INFO L226 Difference]: Without dead ends: 339 [2018-03-29 21:25:39,603 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 411 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2018-03-29 21:25:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-03-29 21:25:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-03-29 21:25:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-03-29 21:25:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 337 transitions. [2018-03-29 21:25:39,620 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 337 transitions. Word has length 226 [2018-03-29 21:25:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:39,620 INFO L459 AbstractCegarLoop]: Abstraction has 328 states and 337 transitions. [2018-03-29 21:25:39,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-03-29 21:25:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 337 transitions. [2018-03-29 21:25:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-03-29 21:25:39,622 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:39,623 INFO L355 BasicCegarLoop]: trace histogram [22, 17, 16, 16, 16, 16, 16, 16, 16, 6, 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, 1, 1, 1] [2018-03-29 21:25:39,623 INFO L408 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1566237473, now seen corresponding path program 9 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 [2018-03-29 21:25:39,632 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:39,695 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 1064 proven. 33 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-03-29 21:25:39,900 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 1064 proven. 33 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-03-29 21:25:40,142 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:40,142 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2018-03-29 21:25:40,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-03-29 21:25:40,143 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-03-29 21:25:40,144 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2018-03-29 21:25:40,144 INFO L87 Difference]: Start difference. First operand 328 states and 337 transitions. Second operand 28 states. [2018-03-29 21:25:40,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:40,494 INFO L93 Difference]: Finished difference Result 471 states and 488 transitions. [2018-03-29 21:25:40,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-03-29 21:25:40,495 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 274 [2018-03-29 21:25:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:40,496 INFO L225 Difference]: With dead ends: 471 [2018-03-29 21:25:40,496 INFO L226 Difference]: Without dead ends: 338 [2018-03-29 21:25:40,497 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 511 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2018-03-29 21:25:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-03-29 21:25:40,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-03-29 21:25:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-03-29 21:25:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 335 transitions. [2018-03-29 21:25:40,513 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 335 transitions. Word has length 274 [2018-03-29 21:25:40,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:40,513 INFO L459 AbstractCegarLoop]: Abstraction has 328 states and 335 transitions. [2018-03-29 21:25:40,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-03-29 21:25:40,513 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 335 transitions. [2018-03-29 21:25:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-03-29 21:25:40,516 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:40,516 INFO L355 BasicCegarLoop]: trace histogram [23, 18, 17, 17, 17, 17, 17, 17, 17, 6, 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, 1, 1, 1] [2018-03-29 21:25:40,516 INFO L408 AbstractCegarLoop]: === Iteration 21 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:40,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2092871782, now seen corresponding path program 10 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 [2018-03-29 21:25:40,528 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:40,588 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 964 proven. 135 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-03-29 21:25:40,842 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 964 proven. 135 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-03-29 21:25:41,181 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:41,181 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 37 [2018-03-29 21:25:41,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-03-29 21:25:41,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-03-29 21:25:41,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-03-29 21:25:41,183 INFO L87 Difference]: Start difference. First operand 328 states and 335 transitions. Second operand 37 states. [2018-03-29 21:25:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:41,938 INFO L93 Difference]: Finished difference Result 510 states and 525 transitions. [2018-03-29 21:25:41,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-03-29 21:25:41,938 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 283 [2018-03-29 21:25:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:41,940 INFO L225 Difference]: With dead ends: 510 [2018-03-29 21:25:41,940 INFO L226 Difference]: Without dead ends: 394 [2018-03-29 21:25:41,941 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 517 SyntacticMatches, 13 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=779, Invalid=3913, Unknown=0, NotChecked=0, Total=4692 [2018-03-29 21:25:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-03-29 21:25:41,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 383. [2018-03-29 21:25:41,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-03-29 21:25:41,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 390 transitions. [2018-03-29 21:25:41,951 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 390 transitions. Word has length 283 [2018-03-29 21:25:41,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:41,951 INFO L459 AbstractCegarLoop]: Abstraction has 383 states and 390 transitions. [2018-03-29 21:25:41,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-03-29 21:25:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 390 transitions. [2018-03-29 21:25:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-03-29 21:25:41,953 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:41,953 INFO L355 BasicCegarLoop]: trace histogram [25, 18, 18, 18, 18, 18, 18, 18, 18, 8, 7, 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, 1, 1] [2018-03-29 21:25:41,953 INFO L408 AbstractCegarLoop]: === Iteration 22 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:41,954 INFO L82 PathProgramCache]: Analyzing trace with hash -506340998, now seen corresponding path program 3 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 [2018-03-29 21:25:41,961 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:42,023 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 1337 proven. 62 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-03-29 21:25:42,272 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 697 proven. 230 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2018-03-29 21:25:42,625 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:42,625 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2018-03-29 21:25:42,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-03-29 21:25:42,626 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-03-29 21:25:42,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2018-03-29 21:25:42,626 INFO L87 Difference]: Start difference. First operand 383 states and 390 transitions. Second operand 34 states. [2018-03-29 21:25:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:43,486 INFO L93 Difference]: Finished difference Result 515 states and 527 transitions. [2018-03-29 21:25:43,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-03-29 21:25:43,487 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 332 [2018-03-29 21:25:43,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:43,489 INFO L225 Difference]: With dead ends: 515 [2018-03-29 21:25:43,489 INFO L226 Difference]: Without dead ends: 393 [2018-03-29 21:25:43,490 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 619 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=572, Invalid=2734, Unknown=0, NotChecked=0, Total=3306 [2018-03-29 21:25:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-03-29 21:25:43,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 383. [2018-03-29 21:25:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-03-29 21:25:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 388 transitions. [2018-03-29 21:25:43,501 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 388 transitions. Word has length 332 [2018-03-29 21:25:43,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:43,501 INFO L459 AbstractCegarLoop]: Abstraction has 383 states and 388 transitions. [2018-03-29 21:25:43,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-03-29 21:25:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 388 transitions. [2018-03-29 21:25:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-03-29 21:25:43,503 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:43,503 INFO L355 BasicCegarLoop]: trace histogram [29, 23, 22, 22, 22, 22, 22, 22, 22, 7, 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, 1, 1, 1] [2018-03-29 21:25:43,503 INFO L408 AbstractCegarLoop]: === Iteration 23 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:43,503 INFO L82 PathProgramCache]: Analyzing trace with hash 444760340, now seen corresponding path program 11 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 [2018-03-29 21:25:43,509 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:43,584 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2796 backedges. 1325 proven. 195 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-03-29 21:25:44,384 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2796 backedges. 1325 proven. 195 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-03-29 21:25:44,793 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:44,793 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 43 [2018-03-29 21:25:44,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-03-29 21:25:44,794 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-03-29 21:25:44,794 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2018-03-29 21:25:44,794 INFO L87 Difference]: Start difference. First operand 383 states and 388 transitions. Second operand 43 states. [2018-03-29 21:25:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:45,802 INFO L93 Difference]: Finished difference Result 574 states and 587 transitions. [2018-03-29 21:25:45,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-03-29 21:25:45,802 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 349 [2018-03-29 21:25:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:45,806 INFO L225 Difference]: With dead ends: 574 [2018-03-29 21:25:45,806 INFO L226 Difference]: Without dead ends: 466 [2018-03-29 21:25:45,808 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 641 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1044, Invalid=5436, Unknown=0, NotChecked=0, Total=6480 [2018-03-29 21:25:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2018-03-29 21:25:45,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 450. [2018-03-29 21:25:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-03-29 21:25:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 456 transitions. [2018-03-29 21:25:45,826 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 456 transitions. Word has length 349 [2018-03-29 21:25:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:45,826 INFO L459 AbstractCegarLoop]: Abstraction has 450 states and 456 transitions. [2018-03-29 21:25:45,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-03-29 21:25:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 456 transitions. [2018-03-29 21:25:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-03-29 21:25:45,829 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:45,830 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, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:25:45,830 INFO L408 AbstractCegarLoop]: === Iteration 24 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:45,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1370040090, now seen corresponding path program 4 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 [2018-03-29 21:25:45,839 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:45,924 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 1058 proven. 100 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2018-03-29 21:25:46,204 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 1058 proven. 100 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2018-03-29 21:25:46,618 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:46,619 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 40 [2018-03-29 21:25:46,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-03-29 21:25:46,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-03-29 21:25:46,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-03-29 21:25:46,621 INFO L87 Difference]: Start difference. First operand 450 states and 456 transitions. Second operand 40 states. [2018-03-29 21:25:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:47,122 INFO L93 Difference]: Finished difference Result 574 states and 584 transitions. [2018-03-29 21:25:47,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-29 21:25:47,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 350 [2018-03-29 21:25:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:47,124 INFO L225 Difference]: With dead ends: 574 [2018-03-29 21:25:47,124 INFO L226 Difference]: Without dead ends: 460 [2018-03-29 21:25:47,125 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 647 SyntacticMatches, 15 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=3904, Unknown=0, NotChecked=0, Total=4692 [2018-03-29 21:25:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2018-03-29 21:25:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2018-03-29 21:25:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-03-29 21:25:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 454 transitions. [2018-03-29 21:25:47,141 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 454 transitions. Word has length 350 [2018-03-29 21:25:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:47,141 INFO L459 AbstractCegarLoop]: Abstraction has 450 states and 454 transitions. [2018-03-29 21:25:47,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-03-29 21:25:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 454 transitions. [2018-03-29 21:25:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-03-29 21:25:47,144 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:47,144 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, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:25:47,145 INFO L408 AbstractCegarLoop]: === Iteration 25 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -632513527, now seen corresponding path program 5 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 [2018-03-29 21:25:47,154 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:47,217 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-03-29 21:25:47,393 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-03-29 21:25:47,619 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:47,619 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-03-29 21:25:47,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-03-29 21:25:47,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-03-29 21:25:47,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2018-03-29 21:25:47,621 INFO L87 Difference]: Start difference. First operand 450 states and 454 transitions. Second operand 32 states. [2018-03-29 21:25:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:48,020 INFO L93 Difference]: Finished difference Result 565 states and 584 transitions. [2018-03-29 21:25:48,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-29 21:25:48,021 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 359 [2018-03-29 21:25:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:48,023 INFO L225 Difference]: With dead ends: 565 [2018-03-29 21:25:48,023 INFO L226 Difference]: Without dead ends: 545 [2018-03-29 21:25:48,024 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1155, Invalid=2385, Unknown=0, NotChecked=0, Total=3540 [2018-03-29 21:25:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2018-03-29 21:25:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 535. [2018-03-29 21:25:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2018-03-29 21:25:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 546 transitions. [2018-03-29 21:25:48,038 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 546 transitions. Word has length 359 [2018-03-29 21:25:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:48,038 INFO L459 AbstractCegarLoop]: Abstraction has 535 states and 546 transitions. [2018-03-29 21:25:48,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-03-29 21:25:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 546 transitions. [2018-03-29 21:25:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-03-29 21:25:48,040 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:48,041 INFO L355 BasicCegarLoop]: trace histogram [36, 29, 28, 28, 28, 28, 28, 28, 28, 8, 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, 1, 1, 1] [2018-03-29 21:25:48,041 INFO L408 AbstractCegarLoop]: === Iteration 26 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:48,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1413653835, now seen corresponding path program 12 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 [2018-03-29 21:25:48,048 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:48,125 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4403 backedges. 1743 proven. 266 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-03-29 21:25:48,534 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4403 backedges. 1743 proven. 266 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-03-29 21:25:48,961 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:48,961 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 49 [2018-03-29 21:25:48,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-03-29 21:25:48,962 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-03-29 21:25:48,962 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2018-03-29 21:25:48,962 INFO L87 Difference]: Start difference. First operand 535 states and 546 transitions. Second operand 49 states. [2018-03-29 21:25:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:49,994 INFO L93 Difference]: Finished difference Result 801 states and 824 transitions. [2018-03-29 21:25:49,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-03-29 21:25:49,995 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 424 [2018-03-29 21:25:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:49,998 INFO L225 Difference]: With dead ends: 801 [2018-03-29 21:25:49,998 INFO L226 Difference]: Without dead ends: 619 [2018-03-29 21:25:50,000 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 783 SyntacticMatches, 17 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1347, Invalid=7209, Unknown=0, NotChecked=0, Total=8556 [2018-03-29 21:25:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2018-03-29 21:25:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 608. [2018-03-29 21:25:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-03-29 21:25:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 619 transitions. [2018-03-29 21:25:50,025 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 619 transitions. Word has length 424 [2018-03-29 21:25:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:50,025 INFO L459 AbstractCegarLoop]: Abstraction has 608 states and 619 transitions. [2018-03-29 21:25:50,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-03-29 21:25:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 619 transitions. [2018-03-29 21:25:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-03-29 21:25:50,029 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:50,029 INFO L355 BasicCegarLoop]: trace histogram [43, 35, 34, 34, 34, 34, 34, 34, 34, 9, 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, 1, 1, 1] [2018-03-29 21:25:50,030 INFO L408 AbstractCegarLoop]: === Iteration 27 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash -136396620, now seen corresponding path program 13 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 [2018-03-29 21:25:50,039 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:50,174 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6379 backedges. 3614 proven. 147 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-03-29 21:25:50,707 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6379 backedges. 3614 proven. 147 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-03-29 21:25:51,400 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:51,400 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 46 [2018-03-29 21:25:51,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-03-29 21:25:51,401 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-03-29 21:25:51,401 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2018-03-29 21:25:51,401 INFO L87 Difference]: Start difference. First operand 608 states and 619 transitions. Second operand 46 states. [2018-03-29 21:25:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:52,102 INFO L93 Difference]: Finished difference Result 810 states and 836 transitions. [2018-03-29 21:25:52,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-03-29 21:25:52,102 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 499 [2018-03-29 21:25:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:52,104 INFO L225 Difference]: With dead ends: 810 [2018-03-29 21:25:52,104 INFO L226 Difference]: Without dead ends: 622 [2018-03-29 21:25:52,105 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 937 SyntacticMatches, 17 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1038, Invalid=5282, Unknown=0, NotChecked=0, Total=6320 [2018-03-29 21:25:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2018-03-29 21:25:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 608. [2018-03-29 21:25:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-03-29 21:25:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 617 transitions. [2018-03-29 21:25:52,119 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 617 transitions. Word has length 499 [2018-03-29 21:25:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:52,120 INFO L459 AbstractCegarLoop]: Abstraction has 608 states and 617 transitions. [2018-03-29 21:25:52,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-03-29 21:25:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 617 transitions. [2018-03-29 21:25:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-03-29 21:25:52,122 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:52,122 INFO L355 BasicCegarLoop]: trace histogram [44, 36, 35, 35, 35, 35, 35, 35, 35, 9, 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, 1, 1, 1] [2018-03-29 21:25:52,122 INFO L408 AbstractCegarLoop]: === Iteration 28 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:52,123 INFO L82 PathProgramCache]: Analyzing trace with hash 38415205, now seen corresponding path program 14 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 [2018-03-29 21:25:52,132 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:52,252 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6704 backedges. 1976 proven. 210 refuted. 0 times theorem prover too weak. 4518 trivial. 0 not checked. [2018-03-29 21:25:52,438 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6704 backedges. 1976 proven. 210 refuted. 0 times theorem prover too weak. 4518 trivial. 0 not checked. [2018-03-29 21:25:52,870 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:52,870 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-03-29 21:25:52,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-03-29 21:25:52,871 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-03-29 21:25:52,871 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2018-03-29 21:25:52,871 INFO L87 Difference]: Start difference. First operand 608 states and 617 transitions. Second operand 32 states. [2018-03-29 21:25:54,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:54,035 INFO L93 Difference]: Finished difference Result 717 states and 789 transitions. [2018-03-29 21:25:54,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-29 21:25:54,035 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 508 [2018-03-29 21:25:54,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:54,039 INFO L225 Difference]: With dead ends: 717 [2018-03-29 21:25:54,039 INFO L226 Difference]: Without dead ends: 716 [2018-03-29 21:25:54,040 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1096, Invalid=3194, Unknown=0, NotChecked=0, Total=4290 [2018-03-29 21:25:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2018-03-29 21:25:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 679. [2018-03-29 21:25:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2018-03-29 21:25:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 703 transitions. [2018-03-29 21:25:54,071 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 703 transitions. Word has length 508 [2018-03-29 21:25:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:54,072 INFO L459 AbstractCegarLoop]: Abstraction has 679 states and 703 transitions. [2018-03-29 21:25:54,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-03-29 21:25:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 703 transitions. [2018-03-29 21:25:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2018-03-29 21:25:54,076 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:54,076 INFO L355 BasicCegarLoop]: trace histogram [44, 36, 36, 35, 35, 35, 35, 35, 35, 9, 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, 1, 1, 1] [2018-03-29 21:25:54,076 INFO L408 AbstractCegarLoop]: === Iteration 29 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:54,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1190871407, now seen corresponding path program 3 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 [2018-03-29 21:25:54,088 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:54,227 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:54,233 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 [2018-03-29 21:25:54,234 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-29 21:25:54,238 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-29 21:25:54,238 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-29 21:25:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6739 backedges. 2044 proven. 233 refuted. 0 times theorem prover too weak. 4462 trivial. 0 not checked. [2018-03-29 21:25:55,027 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6739 backedges. 2044 proven. 233 refuted. 0 times theorem prover too weak. 4462 trivial. 0 not checked. [2018-03-29 21:25:55,646 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:55,646 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2018-03-29 21:25:55,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-03-29 21:25:55,647 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-03-29 21:25:55,647 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2018-03-29 21:25:55,647 INFO L87 Difference]: Start difference. First operand 679 states and 703 transitions. Second operand 41 states. [2018-03-29 21:25:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:25:58,017 INFO L93 Difference]: Finished difference Result 705 states and 777 transitions. [2018-03-29 21:25:58,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-03-29 21:25:58,018 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 509 [2018-03-29 21:25:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:25:58,020 INFO L225 Difference]: With dead ends: 705 [2018-03-29 21:25:58,020 INFO L226 Difference]: Without dead ends: 704 [2018-03-29 21:25:58,020 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1063 GetRequests, 964 SyntacticMatches, 15 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1587, Invalid=5723, Unknown=0, NotChecked=0, Total=7310 [2018-03-29 21:25:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2018-03-29 21:25:58,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 680. [2018-03-29 21:25:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2018-03-29 21:25:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 697 transitions. [2018-03-29 21:25:58,049 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 697 transitions. Word has length 509 [2018-03-29 21:25:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:25:58,049 INFO L459 AbstractCegarLoop]: Abstraction has 680 states and 697 transitions. [2018-03-29 21:25:58,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-03-29 21:25:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 697 transitions. [2018-03-29 21:25:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-03-29 21:25:58,054 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:25:58,055 INFO L355 BasicCegarLoop]: trace histogram [52, 44, 43, 43, 43, 43, 43, 43, 43, 9, 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, 1, 1, 1] [2018-03-29 21:25:58,055 INFO L408 AbstractCegarLoop]: === Iteration 30 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:25:58,055 INFO L82 PathProgramCache]: Analyzing trace with hash 726123749, now seen corresponding path program 15 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 [2018-03-29 21:25:58,063 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:25:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:25:58,220 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:25:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9628 backedges. 4954 proven. 348 refuted. 0 times theorem prover too weak. 4326 trivial. 0 not checked. [2018-03-29 21:25:59,107 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:25:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9628 backedges. 4954 proven. 348 refuted. 0 times theorem prover too weak. 4326 trivial. 0 not checked. [2018-03-29 21:25:59,947 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:25:59,948 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 55 [2018-03-29 21:25:59,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-03-29 21:25:59,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-03-29 21:25:59,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2573, Unknown=0, NotChecked=0, Total=2970 [2018-03-29 21:25:59,949 INFO L87 Difference]: Start difference. First operand 680 states and 697 transitions. Second operand 55 states. [2018-03-29 21:26:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:01,283 INFO L93 Difference]: Finished difference Result 1016 states and 1051 transitions. [2018-03-29 21:26:01,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-03-29 21:26:01,283 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 580 [2018-03-29 21:26:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:01,287 INFO L225 Difference]: With dead ends: 1016 [2018-03-29 21:26:01,287 INFO L226 Difference]: Without dead ends: 773 [2018-03-29 21:26:01,291 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1209 GetRequests, 1087 SyntacticMatches, 19 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1688, Invalid=9232, Unknown=0, NotChecked=0, Total=10920 [2018-03-29 21:26:01,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2018-03-29 21:26:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 762. [2018-03-29 21:26:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2018-03-29 21:26:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 779 transitions. [2018-03-29 21:26:01,317 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 779 transitions. Word has length 580 [2018-03-29 21:26:01,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:01,318 INFO L459 AbstractCegarLoop]: Abstraction has 762 states and 779 transitions. [2018-03-29 21:26:01,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-03-29 21:26:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 779 transitions. [2018-03-29 21:26:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2018-03-29 21:26:01,324 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:01,325 INFO L355 BasicCegarLoop]: trace histogram [60, 51, 50, 50, 50, 50, 50, 50, 50, 10, 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, 1, 1, 1] [2018-03-29 21:26:01,325 INFO L408 AbstractCegarLoop]: === Iteration 31 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:01,325 INFO L82 PathProgramCache]: Analyzing trace with hash -952377345, now seen corresponding path program 16 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 [2018-03-29 21:26:01,334 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:01,486 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12939 backedges. 7600 proven. 203 refuted. 0 times theorem prover too weak. 5136 trivial. 0 not checked. [2018-03-29 21:26:02,082 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12939 backedges. 7600 proven. 203 refuted. 0 times theorem prover too weak. 5136 trivial. 0 not checked. [2018-03-29 21:26:02,740 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:02,740 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 52 [2018-03-29 21:26:02,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-03-29 21:26:02,741 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-03-29 21:26:02,741 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2018-03-29 21:26:02,741 INFO L87 Difference]: Start difference. First operand 762 states and 779 transitions. Second operand 52 states. [2018-03-29 21:26:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:03,506 INFO L93 Difference]: Finished difference Result 1021 states and 1058 transitions. [2018-03-29 21:26:03,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-03-29 21:26:03,506 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 664 [2018-03-29 21:26:03,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:03,509 INFO L225 Difference]: With dead ends: 1021 [2018-03-29 21:26:03,509 INFO L226 Difference]: Without dead ends: 772 [2018-03-29 21:26:03,511 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1259 SyntacticMatches, 19 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1322, Invalid=6868, Unknown=0, NotChecked=0, Total=8190 [2018-03-29 21:26:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2018-03-29 21:26:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 762. [2018-03-29 21:26:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2018-03-29 21:26:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 777 transitions. [2018-03-29 21:26:03,533 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 777 transitions. Word has length 664 [2018-03-29 21:26:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:03,534 INFO L459 AbstractCegarLoop]: Abstraction has 762 states and 777 transitions. [2018-03-29 21:26:03,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-03-29 21:26:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 777 transitions. [2018-03-29 21:26:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2018-03-29 21:26:03,540 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:03,540 INFO L355 BasicCegarLoop]: trace histogram [61, 52, 51, 51, 51, 51, 51, 51, 51, 10, 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, 1, 1, 1] [2018-03-29 21:26:03,541 INFO L408 AbstractCegarLoop]: === Iteration 32 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1614300038, now seen corresponding path program 17 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 [2018-03-29 21:26:03,550 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:03,696 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13410 backedges. 6150 proven. 441 refuted. 0 times theorem prover too weak. 6819 trivial. 0 not checked. [2018-03-29 21:26:04,411 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13410 backedges. 6150 proven. 441 refuted. 0 times theorem prover too weak. 6819 trivial. 0 not checked. [2018-03-29 21:26:05,107 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:05,107 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 61 [2018-03-29 21:26:05,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-03-29 21:26:05,108 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-03-29 21:26:05,108 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2018-03-29 21:26:05,109 INFO L87 Difference]: Start difference. First operand 762 states and 777 transitions. Second operand 61 states. [2018-03-29 21:26:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:06,576 INFO L93 Difference]: Finished difference Result 1096 states and 1127 transitions. [2018-03-29 21:26:06,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-03-29 21:26:06,576 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 673 [2018-03-29 21:26:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:06,578 INFO L225 Difference]: With dead ends: 1096 [2018-03-29 21:26:06,579 INFO L226 Difference]: Without dead ends: 864 [2018-03-29 21:26:06,581 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1401 GetRequests, 1265 SyntacticMatches, 21 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2067, Invalid=11505, Unknown=0, NotChecked=0, Total=13572 [2018-03-29 21:26:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2018-03-29 21:26:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 853. [2018-03-29 21:26:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2018-03-29 21:26:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 868 transitions. [2018-03-29 21:26:06,600 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 868 transitions. Word has length 673 [2018-03-29 21:26:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:06,600 INFO L459 AbstractCegarLoop]: Abstraction has 853 states and 868 transitions. [2018-03-29 21:26:06,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-03-29 21:26:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 868 transitions. [2018-03-29 21:26:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2018-03-29 21:26:06,605 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:06,605 INFO L355 BasicCegarLoop]: trace histogram [70, 60, 59, 59, 59, 59, 59, 59, 59, 11, 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, 1, 1, 1] [2018-03-29 21:26:06,605 INFO L408 AbstractCegarLoop]: === Iteration 33 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:06,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1537920763, now seen corresponding path program 18 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 [2018-03-29 21:26:06,613 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:06,760 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17821 backedges. 9867 proven. 268 refuted. 0 times theorem prover too weak. 7686 trivial. 0 not checked. [2018-03-29 21:26:07,429 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17821 backedges. 9867 proven. 268 refuted. 0 times theorem prover too weak. 7686 trivial. 0 not checked. [2018-03-29 21:26:08,223 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:08,224 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 58 [2018-03-29 21:26:08,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-03-29 21:26:08,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-03-29 21:26:08,225 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=2850, Unknown=0, NotChecked=0, Total=3306 [2018-03-29 21:26:08,226 INFO L87 Difference]: Start difference. First operand 853 states and 868 transitions. Second operand 58 states. [2018-03-29 21:26:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:09,288 INFO L93 Difference]: Finished difference Result 1101 states and 1133 transitions. [2018-03-29 21:26:09,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-03-29 21:26:09,320 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 766 [2018-03-29 21:26:09,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:09,323 INFO L225 Difference]: With dead ends: 1101 [2018-03-29 21:26:09,323 INFO L226 Difference]: Without dead ends: 863 [2018-03-29 21:26:09,325 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1455 SyntacticMatches, 21 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1640, Invalid=8662, Unknown=0, NotChecked=0, Total=10302 [2018-03-29 21:26:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-03-29 21:26:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 853. [2018-03-29 21:26:09,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2018-03-29 21:26:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 866 transitions. [2018-03-29 21:26:09,342 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 866 transitions. Word has length 766 [2018-03-29 21:26:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:09,343 INFO L459 AbstractCegarLoop]: Abstraction has 853 states and 866 transitions. [2018-03-29 21:26:09,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-03-29 21:26:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 866 transitions. [2018-03-29 21:26:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2018-03-29 21:26:09,348 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:09,348 INFO L355 BasicCegarLoop]: trace histogram [71, 61, 60, 60, 60, 60, 60, 60, 60, 11, 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, 1, 1, 1] [2018-03-29 21:26:09,348 INFO L408 AbstractCegarLoop]: === Iteration 34 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1699885620, now seen corresponding path program 19 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 [2018-03-29 21:26:09,354 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:09,494 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18375 backedges. 7475 proven. 545 refuted. 0 times theorem prover too weak. 10355 trivial. 0 not checked. [2018-03-29 21:26:10,208 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18375 backedges. 7475 proven. 545 refuted. 0 times theorem prover too weak. 10355 trivial. 0 not checked. [2018-03-29 21:26:11,045 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:11,045 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 67 [2018-03-29 21:26:11,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-03-29 21:26:11,046 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-03-29 21:26:11,046 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2018-03-29 21:26:11,046 INFO L87 Difference]: Start difference. First operand 853 states and 866 transitions. Second operand 67 states. [2018-03-29 21:26:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:12,737 INFO L93 Difference]: Finished difference Result 1185 states and 1212 transitions. [2018-03-29 21:26:12,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-03-29 21:26:12,737 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 775 [2018-03-29 21:26:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:12,740 INFO L225 Difference]: With dead ends: 1185 [2018-03-29 21:26:12,740 INFO L226 Difference]: Without dead ends: 964 [2018-03-29 21:26:12,742 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1611 GetRequests, 1461 SyntacticMatches, 23 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2484, Invalid=14028, Unknown=0, NotChecked=0, Total=16512 [2018-03-29 21:26:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2018-03-29 21:26:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 953. [2018-03-29 21:26:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-03-29 21:26:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 966 transitions. [2018-03-29 21:26:12,758 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 966 transitions. Word has length 775 [2018-03-29 21:26:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:12,759 INFO L459 AbstractCegarLoop]: Abstraction has 953 states and 966 transitions. [2018-03-29 21:26:12,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-03-29 21:26:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 966 transitions. [2018-03-29 21:26:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2018-03-29 21:26:12,765 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:12,765 INFO L355 BasicCegarLoop]: trace histogram [81, 70, 69, 69, 69, 69, 69, 69, 69, 12, 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, 1, 1, 1] [2018-03-29 21:26:12,765 INFO L408 AbstractCegarLoop]: === Iteration 35 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash 748797038, now seen corresponding path program 20 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 [2018-03-29 21:26:12,774 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:12,931 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24126 backedges. 12514 proven. 342 refuted. 0 times theorem prover too weak. 11270 trivial. 0 not checked. [2018-03-29 21:26:13,700 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24126 backedges. 12514 proven. 342 refuted. 0 times theorem prover too weak. 11270 trivial. 0 not checked. [2018-03-29 21:26:14,646 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:14,647 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 64 [2018-03-29 21:26:14,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-03-29 21:26:14,648 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-03-29 21:26:14,648 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=3486, Unknown=0, NotChecked=0, Total=4032 [2018-03-29 21:26:14,648 INFO L87 Difference]: Start difference. First operand 953 states and 966 transitions. Second operand 64 states. [2018-03-29 21:26:15,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:15,730 INFO L93 Difference]: Finished difference Result 1190 states and 1217 transitions. [2018-03-29 21:26:15,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-03-29 21:26:15,730 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 877 [2018-03-29 21:26:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:15,733 INFO L225 Difference]: With dead ends: 1190 [2018-03-29 21:26:15,733 INFO L226 Difference]: Without dead ends: 963 [2018-03-29 21:26:15,734 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1803 GetRequests, 1669 SyntacticMatches, 23 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4780 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1992, Invalid=10664, Unknown=0, NotChecked=0, Total=12656 [2018-03-29 21:26:15,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2018-03-29 21:26:15,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 953. [2018-03-29 21:26:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-03-29 21:26:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 964 transitions. [2018-03-29 21:26:15,751 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 964 transitions. Word has length 877 [2018-03-29 21:26:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:15,751 INFO L459 AbstractCegarLoop]: Abstraction has 953 states and 964 transitions. [2018-03-29 21:26:15,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-03-29 21:26:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 964 transitions. [2018-03-29 21:26:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2018-03-29 21:26:15,756 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:15,757 INFO L355 BasicCegarLoop]: trace histogram [82, 71, 70, 70, 70, 70, 70, 70, 70, 12, 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, 1, 1, 1] [2018-03-29 21:26:15,757 INFO L408 AbstractCegarLoop]: === Iteration 36 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:15,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2062455573, now seen corresponding path program 21 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 [2018-03-29 21:26:15,763 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:15,921 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24772 backedges. 8929 proven. 660 refuted. 0 times theorem prover too weak. 15183 trivial. 0 not checked. [2018-03-29 21:26:16,789 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24772 backedges. 8929 proven. 660 refuted. 0 times theorem prover too weak. 15183 trivial. 0 not checked. [2018-03-29 21:26:17,771 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:17,771 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 73 [2018-03-29 21:26:17,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-03-29 21:26:17,772 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-03-29 21:26:17,772 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=4583, Unknown=0, NotChecked=0, Total=5256 [2018-03-29 21:26:17,772 INFO L87 Difference]: Start difference. First operand 953 states and 964 transitions. Second operand 73 states. [2018-03-29 21:26:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:19,718 INFO L93 Difference]: Finished difference Result 1283 states and 1306 transitions. [2018-03-29 21:26:19,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-03-29 21:26:19,754 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 886 [2018-03-29 21:26:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:19,757 INFO L225 Difference]: With dead ends: 1283 [2018-03-29 21:26:19,757 INFO L226 Difference]: Without dead ends: 1073 [2018-03-29 21:26:19,758 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1839 GetRequests, 1675 SyntacticMatches, 25 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5255 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2939, Invalid=16801, Unknown=0, NotChecked=0, Total=19740 [2018-03-29 21:26:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2018-03-29 21:26:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1062. [2018-03-29 21:26:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2018-03-29 21:26:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1073 transitions. [2018-03-29 21:26:19,776 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1073 transitions. Word has length 886 [2018-03-29 21:26:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:19,777 INFO L459 AbstractCegarLoop]: Abstraction has 1062 states and 1073 transitions. [2018-03-29 21:26:19,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-03-29 21:26:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1073 transitions. [2018-03-29 21:26:19,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2018-03-29 21:26:19,783 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:19,784 INFO L355 BasicCegarLoop]: trace histogram [93, 81, 80, 80, 80, 80, 80, 80, 80, 13, 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, 1, 1, 1] [2018-03-29 21:26:19,784 INFO L408 AbstractCegarLoop]: === Iteration 37 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1885281964, now seen corresponding path program 22 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 [2018-03-29 21:26:19,789 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:19,949 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32130 backedges. 15568 proven. 425 refuted. 0 times theorem prover too weak. 16137 trivial. 0 not checked. [2018-03-29 21:26:20,915 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32130 backedges. 15568 proven. 425 refuted. 0 times theorem prover too weak. 16137 trivial. 0 not checked. [2018-03-29 21:26:22,059 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:22,060 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 70 [2018-03-29 21:26:22,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-03-29 21:26:22,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-03-29 21:26:22,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=4186, Unknown=0, NotChecked=0, Total=4830 [2018-03-29 21:26:22,061 INFO L87 Difference]: Start difference. First operand 1062 states and 1073 transitions. Second operand 70 states. [2018-03-29 21:26:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:23,171 INFO L93 Difference]: Finished difference Result 1288 states and 1310 transitions. [2018-03-29 21:26:23,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-03-29 21:26:23,172 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 997 [2018-03-29 21:26:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:23,174 INFO L225 Difference]: With dead ends: 1288 [2018-03-29 21:26:23,174 INFO L226 Difference]: Without dead ends: 1072 [2018-03-29 21:26:23,176 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2048 GetRequests, 1901 SyntacticMatches, 25 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5824 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2378, Invalid=12874, Unknown=0, NotChecked=0, Total=15252 [2018-03-29 21:26:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2018-03-29 21:26:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1062. [2018-03-29 21:26:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2018-03-29 21:26:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1071 transitions. [2018-03-29 21:26:23,201 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1071 transitions. Word has length 997 [2018-03-29 21:26:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:23,201 INFO L459 AbstractCegarLoop]: Abstraction has 1062 states and 1071 transitions. [2018-03-29 21:26:23,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-03-29 21:26:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1071 transitions. [2018-03-29 21:26:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2018-03-29 21:26:23,207 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:23,208 INFO L355 BasicCegarLoop]: trace histogram [94, 82, 81, 81, 81, 81, 81, 81, 81, 13, 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, 1, 1, 1] [2018-03-29 21:26:23,208 INFO L408 AbstractCegarLoop]: === Iteration 38 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash -556373307, now seen corresponding path program 23 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 [2018-03-29 21:26:23,227 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:23,388 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32877 backedges. 10512 proven. 786 refuted. 0 times theorem prover too weak. 21579 trivial. 0 not checked. [2018-03-29 21:26:24,425 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32877 backedges. 10512 proven. 786 refuted. 0 times theorem prover too weak. 21579 trivial. 0 not checked. [2018-03-29 21:26:25,596 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:25,597 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 79 [2018-03-29 21:26:25,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-03-29 21:26:25,598 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-03-29 21:26:25,598 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=5381, Unknown=0, NotChecked=0, Total=6162 [2018-03-29 21:26:25,598 INFO L87 Difference]: Start difference. First operand 1062 states and 1071 transitions. Second operand 79 states. [2018-03-29 21:26:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:27,743 INFO L93 Difference]: Finished difference Result 1390 states and 1409 transitions. [2018-03-29 21:26:27,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-03-29 21:26:27,744 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 1006 [2018-03-29 21:26:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:27,747 INFO L225 Difference]: With dead ends: 1390 [2018-03-29 21:26:27,747 INFO L226 Difference]: Without dead ends: 1191 [2018-03-29 21:26:27,749 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2085 GetRequests, 1907 SyntacticMatches, 27 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6243 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3432, Invalid=19824, Unknown=0, NotChecked=0, Total=23256 [2018-03-29 21:26:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2018-03-29 21:26:27,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1180. [2018-03-29 21:26:27,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-03-29 21:26:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1189 transitions. [2018-03-29 21:26:27,770 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1189 transitions. Word has length 1006 [2018-03-29 21:26:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:27,771 INFO L459 AbstractCegarLoop]: Abstraction has 1180 states and 1189 transitions. [2018-03-29 21:26:27,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-03-29 21:26:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1189 transitions. [2018-03-29 21:26:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2018-03-29 21:26:27,783 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:27,783 INFO L355 BasicCegarLoop]: trace histogram [106, 93, 92, 92, 92, 92, 92, 92, 92, 14, 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, 1, 1, 1] [2018-03-29 21:26:27,783 INFO L408 AbstractCegarLoop]: === Iteration 39 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1038369439, now seen corresponding path program 24 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 [2018-03-29 21:26:27,792 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:27,981 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42136 backedges. 19056 proven. 517 refuted. 0 times theorem prover too weak. 22563 trivial. 0 not checked. [2018-03-29 21:26:29,084 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42136 backedges. 19056 proven. 517 refuted. 0 times theorem prover too weak. 22563 trivial. 0 not checked. [2018-03-29 21:26:30,671 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:30,671 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 76 [2018-03-29 21:26:30,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-03-29 21:26:30,673 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-03-29 21:26:30,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=4950, Unknown=0, NotChecked=0, Total=5700 [2018-03-29 21:26:30,673 INFO L87 Difference]: Start difference. First operand 1180 states and 1189 transitions. Second operand 76 states. [2018-03-29 21:26:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:32,044 INFO L93 Difference]: Finished difference Result 1395 states and 1412 transitions. [2018-03-29 21:26:32,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-03-29 21:26:32,044 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 1126 [2018-03-29 21:26:32,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:32,047 INFO L225 Difference]: With dead ends: 1395 [2018-03-29 21:26:32,047 INFO L226 Difference]: Without dead ends: 1190 [2018-03-29 21:26:32,049 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2311 GetRequests, 2151 SyntacticMatches, 27 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6971 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2798, Invalid=15292, Unknown=0, NotChecked=0, Total=18090 [2018-03-29 21:26:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2018-03-29 21:26:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1180. [2018-03-29 21:26:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-03-29 21:26:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1187 transitions. [2018-03-29 21:26:32,070 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1187 transitions. Word has length 1126 [2018-03-29 21:26:32,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:32,070 INFO L459 AbstractCegarLoop]: Abstraction has 1180 states and 1187 transitions. [2018-03-29 21:26:32,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-03-29 21:26:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1187 transitions. [2018-03-29 21:26:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2018-03-29 21:26:32,078 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:32,078 INFO L355 BasicCegarLoop]: trace histogram [107, 94, 93, 93, 93, 93, 93, 93, 93, 14, 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, 1, 1, 1] [2018-03-29 21:26:32,078 INFO L408 AbstractCegarLoop]: === Iteration 40 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:32,078 INFO L82 PathProgramCache]: Analyzing trace with hash -246133286, now seen corresponding path program 25 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 [2018-03-29 21:26:32,086 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:32,269 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42993 backedges. 12224 proven. 923 refuted. 0 times theorem prover too weak. 29846 trivial. 0 not checked. [2018-03-29 21:26:33,639 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42993 backedges. 12224 proven. 923 refuted. 0 times theorem prover too weak. 29846 trivial. 0 not checked. [2018-03-29 21:26:35,048 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:35,048 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 85 [2018-03-29 21:26:35,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-03-29 21:26:35,050 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-03-29 21:26:35,050 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=6243, Unknown=0, NotChecked=0, Total=7140 [2018-03-29 21:26:35,051 INFO L87 Difference]: Start difference. First operand 1180 states and 1187 transitions. Second operand 85 states. [2018-03-29 21:26:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:37,660 INFO L93 Difference]: Finished difference Result 1506 states and 1521 transitions. [2018-03-29 21:26:37,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-03-29 21:26:37,660 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 1135 [2018-03-29 21:26:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:37,664 INFO L225 Difference]: With dead ends: 1506 [2018-03-29 21:26:37,664 INFO L226 Difference]: Without dead ends: 1318 [2018-03-29 21:26:37,665 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2349 GetRequests, 2157 SyntacticMatches, 29 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7316 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3963, Invalid=23097, Unknown=0, NotChecked=0, Total=27060 [2018-03-29 21:26:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2018-03-29 21:26:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1307. [2018-03-29 21:26:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2018-03-29 21:26:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1314 transitions. [2018-03-29 21:26:37,687 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1314 transitions. Word has length 1135 [2018-03-29 21:26:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:37,688 INFO L459 AbstractCegarLoop]: Abstraction has 1307 states and 1314 transitions. [2018-03-29 21:26:37,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-03-29 21:26:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1314 transitions. [2018-03-29 21:26:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1257 [2018-03-29 21:26:37,696 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:37,697 INFO L355 BasicCegarLoop]: trace histogram [117, 102, 102, 102, 102, 102, 102, 102, 102, 16, 15, 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, 1, 1] [2018-03-29 21:26:37,697 INFO L408 AbstractCegarLoop]: === Iteration 41 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:37,697 INFO L82 PathProgramCache]: Analyzing trace with hash 126270650, now seen corresponding path program 6 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 [2018-03-29 21:26:37,703 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:37,901 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 51654 backedges. 20549 proven. 618 refuted. 0 times theorem prover too weak. 30487 trivial. 0 not checked. [2018-03-29 21:26:39,198 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 51654 backedges. 10173 proven. 1970 refuted. 0 times theorem prover too weak. 39511 trivial. 0 not checked. [2018-03-29 21:26:40,763 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:40,764 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 82 [2018-03-29 21:26:40,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-03-29 21:26:40,765 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-03-29 21:26:40,765 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=5778, Unknown=0, NotChecked=0, Total=6642 [2018-03-29 21:26:40,765 INFO L87 Difference]: Start difference. First operand 1307 states and 1314 transitions. Second operand 82 states. [2018-03-29 21:26:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:42,165 INFO L93 Difference]: Finished difference Result 1511 states and 1523 transitions. [2018-03-29 21:26:42,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-03-29 21:26:42,166 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 1256 [2018-03-29 21:26:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:42,169 INFO L225 Difference]: With dead ends: 1511 [2018-03-29 21:26:42,169 INFO L226 Difference]: Without dead ends: 1317 [2018-03-29 21:26:42,171 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2576 GetRequests, 2403 SyntacticMatches, 29 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8221 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3252, Invalid=17918, Unknown=0, NotChecked=0, Total=21170 [2018-03-29 21:26:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2018-03-29 21:26:42,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1307. [2018-03-29 21:26:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2018-03-29 21:26:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1312 transitions. [2018-03-29 21:26:42,195 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1312 transitions. Word has length 1256 [2018-03-29 21:26:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:42,196 INFO L459 AbstractCegarLoop]: Abstraction has 1307 states and 1312 transitions. [2018-03-29 21:26:42,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-03-29 21:26:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1312 transitions. [2018-03-29 21:26:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1274 [2018-03-29 21:26:42,204 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:42,205 INFO L355 BasicCegarLoop]: trace histogram [121, 107, 106, 106, 106, 106, 106, 106, 106, 15, 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, 1, 1, 1] [2018-03-29 21:26:42,205 INFO L408 AbstractCegarLoop]: === Iteration 42 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:42,205 INFO L82 PathProgramCache]: Analyzing trace with hash 290206164, now seen corresponding path program 26 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 [2018-03-29 21:26:42,211 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:42,408 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55450 backedges. 14065 proven. 1071 refuted. 0 times theorem prover too weak. 40314 trivial. 0 not checked. [2018-03-29 21:26:43,862 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 55450 backedges. 14065 proven. 1071 refuted. 0 times theorem prover too weak. 40314 trivial. 0 not checked. [2018-03-29 21:26:45,605 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:45,606 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 91 [2018-03-29 21:26:45,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-03-29 21:26:45,607 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-03-29 21:26:45,607 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=7169, Unknown=0, NotChecked=0, Total=8190 [2018-03-29 21:26:45,607 INFO L87 Difference]: Start difference. First operand 1307 states and 1312 transitions. Second operand 91 states. [2018-03-29 21:26:48,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:48,573 INFO L93 Difference]: Finished difference Result 1642 states and 1655 transitions. [2018-03-29 21:26:48,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-03-29 21:26:48,573 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 1273 [2018-03-29 21:26:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:48,577 INFO L225 Difference]: With dead ends: 1642 [2018-03-29 21:26:48,577 INFO L226 Difference]: Without dead ends: 1462 [2018-03-29 21:26:48,579 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2631 GetRequests, 2425 SyntacticMatches, 31 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8474 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4532, Invalid=26620, Unknown=0, NotChecked=0, Total=31152 [2018-03-29 21:26:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2018-03-29 21:26:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1446. [2018-03-29 21:26:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1446 states. [2018-03-29 21:26:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 1452 transitions. [2018-03-29 21:26:48,608 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 1452 transitions. Word has length 1273 [2018-03-29 21:26:48,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:48,608 INFO L459 AbstractCegarLoop]: Abstraction has 1446 states and 1452 transitions. [2018-03-29 21:26:48,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-03-29 21:26:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 1452 transitions. [2018-03-29 21:26:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2018-03-29 21:26:48,618 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:48,618 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, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:26:48,618 INFO L408 AbstractCegarLoop]: === Iteration 43 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:48,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1866252250, now seen corresponding path program 7 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 [2018-03-29 21:26:48,624 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:48,841 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 53559 backedges. 12490 proven. 728 refuted. 0 times theorem prover too weak. 40341 trivial. 0 not checked. [2018-03-29 21:26:50,282 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 53559 backedges. 12490 proven. 728 refuted. 0 times theorem prover too weak. 40341 trivial. 0 not checked. [2018-03-29 21:26:52,069 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:52,069 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 88 [2018-03-29 21:26:52,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-03-29 21:26:52,071 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-03-29 21:26:52,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=986, Invalid=6670, Unknown=0, NotChecked=0, Total=7656 [2018-03-29 21:26:52,071 INFO L87 Difference]: Start difference. First operand 1446 states and 1452 transitions. Second operand 88 states. [2018-03-29 21:26:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:53,602 INFO L93 Difference]: Finished difference Result 1642 states and 1652 transitions. [2018-03-29 21:26:53,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-03-29 21:26:53,603 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 1274 [2018-03-29 21:26:53,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:53,607 INFO L225 Difference]: With dead ends: 1642 [2018-03-29 21:26:53,607 INFO L226 Difference]: Without dead ends: 1456 [2018-03-29 21:26:53,609 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2617 GetRequests, 2431 SyntacticMatches, 31 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9574 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3740, Invalid=20752, Unknown=0, NotChecked=0, Total=24492 [2018-03-29 21:26:53,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2018-03-29 21:26:53,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1446. [2018-03-29 21:26:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1446 states. [2018-03-29 21:26:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 1450 transitions. [2018-03-29 21:26:53,637 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 1450 transitions. Word has length 1274 [2018-03-29 21:26:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:53,637 INFO L459 AbstractCegarLoop]: Abstraction has 1446 states and 1450 transitions. [2018-03-29 21:26:53,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-03-29 21:26:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 1450 transitions. [2018-03-29 21:26:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1284 [2018-03-29 21:26:53,647 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:53,647 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, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:26:53,647 INFO L408 AbstractCegarLoop]: === Iteration 44 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1874830135, now seen corresponding path program 8 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 [2018-03-29 21:26:53,653 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:53,879 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 54525 backedges. 0 proven. 1185 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-03-29 21:26:54,643 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:26:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 54525 backedges. 0 proven. 1185 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-03-29 21:26:55,756 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:26:55,756 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-03-29 21:26:55,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-03-29 21:26:55,758 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-03-29 21:26:55,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2018-03-29 21:26:55,758 INFO L87 Difference]: Start difference. First operand 1446 states and 1450 transitions. Second operand 64 states. [2018-03-29 21:26:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:26:57,068 INFO L93 Difference]: Finished difference Result 1649 states and 1684 transitions. [2018-03-29 21:26:57,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-03-29 21:26:57,068 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 1283 [2018-03-29 21:26:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:26:57,073 INFO L225 Difference]: With dead ends: 1649 [2018-03-29 21:26:57,073 INFO L226 Difference]: Without dead ends: 1629 [2018-03-29 21:26:57,075 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2625 GetRequests, 2503 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4867, Invalid=10385, Unknown=0, NotChecked=0, Total=15252 [2018-03-29 21:26:57,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2018-03-29 21:26:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1619. [2018-03-29 21:26:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2018-03-29 21:26:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1638 transitions. [2018-03-29 21:26:57,107 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1638 transitions. Word has length 1283 [2018-03-29 21:26:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:26:57,107 INFO L459 AbstractCegarLoop]: Abstraction has 1619 states and 1638 transitions. [2018-03-29 21:26:57,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-03-29 21:26:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1638 transitions. [2018-03-29 21:26:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1421 [2018-03-29 21:26:57,119 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:26:57,119 INFO L355 BasicCegarLoop]: trace histogram [136, 121, 120, 120, 120, 120, 120, 120, 120, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:26:57,119 INFO L408 AbstractCegarLoop]: === Iteration 45 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:26:57,119 INFO L82 PathProgramCache]: Analyzing trace with hash -658120693, now seen corresponding path program 27 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 [2018-03-29 21:26:57,126 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:26:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:26:57,362 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:26:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 70605 backedges. 16035 proven. 1230 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-03-29 21:26:59,065 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:27:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 70605 backedges. 16035 proven. 1230 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-03-29 21:27:00,982 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:27:00,982 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 97 [2018-03-29 21:27:00,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-03-29 21:27:00,983 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-03-29 21:27:00,984 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=8159, Unknown=0, NotChecked=0, Total=9312 [2018-03-29 21:27:00,984 INFO L87 Difference]: Start difference. First operand 1619 states and 1638 transitions. Second operand 97 states. [2018-03-29 21:27:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:27:04,181 INFO L93 Difference]: Finished difference Result 2117 states and 2156 transitions. [2018-03-29 21:27:04,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-03-29 21:27:04,181 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 1420 [2018-03-29 21:27:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:27:04,186 INFO L225 Difference]: With dead ends: 2117 [2018-03-29 21:27:04,186 INFO L226 Difference]: Without dead ends: 1775 [2018-03-29 21:27:04,189 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2931 GetRequests, 2711 SyntacticMatches, 33 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9717 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5139, Invalid=30393, Unknown=0, NotChecked=0, Total=35532 [2018-03-29 21:27:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2018-03-29 21:27:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1764. [2018-03-29 21:27:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2018-03-29 21:27:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1783 transitions. [2018-03-29 21:27:04,243 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1783 transitions. Word has length 1420 [2018-03-29 21:27:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:27:04,244 INFO L459 AbstractCegarLoop]: Abstraction has 1764 states and 1783 transitions. [2018-03-29 21:27:04,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-03-29 21:27:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1783 transitions. [2018-03-29 21:27:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1568 [2018-03-29 21:27:04,264 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:27:04,265 INFO L355 BasicCegarLoop]: trace histogram [151, 135, 134, 134, 134, 134, 134, 134, 134, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:27:04,265 INFO L408 AbstractCegarLoop]: === Iteration 46 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:27:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2022248332, now seen corresponding path program 28 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 [2018-03-29 21:27:04,277 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:27:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:27:04,524 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:27:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 87601 backedges. 32394 proven. 847 refuted. 0 times theorem prover too weak. 54360 trivial. 0 not checked. [2018-03-29 21:27:06,361 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:27:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 87601 backedges. 32394 proven. 847 refuted. 0 times theorem prover too weak. 54360 trivial. 0 not checked. [2018-03-29 21:27:08,437 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:27:08,437 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 94 [2018-03-29 21:27:08,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-03-29 21:27:08,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-03-29 21:27:08,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=7626, Unknown=0, NotChecked=0, Total=8742 [2018-03-29 21:27:08,439 INFO L87 Difference]: Start difference. First operand 1764 states and 1783 transitions. Second operand 94 states. [2018-03-29 21:27:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:27:10,349 INFO L93 Difference]: Finished difference Result 2126 states and 2176 transitions. [2018-03-29 21:27:10,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-03-29 21:27:10,349 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 1567 [2018-03-29 21:27:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:27:10,354 INFO L225 Difference]: With dead ends: 2126 [2018-03-29 21:27:10,354 INFO L226 Difference]: Without dead ends: 1778 [2018-03-29 21:27:10,358 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3208 GetRequests, 3009 SyntacticMatches, 33 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11030 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4262, Invalid=23794, Unknown=0, NotChecked=0, Total=28056 [2018-03-29 21:27:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2018-03-29 21:27:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1764. [2018-03-29 21:27:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2018-03-29 21:27:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1781 transitions. [2018-03-29 21:27:10,393 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1781 transitions. Word has length 1567 [2018-03-29 21:27:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:27:10,394 INFO L459 AbstractCegarLoop]: Abstraction has 1764 states and 1781 transitions. [2018-03-29 21:27:10,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-03-29 21:27:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1781 transitions. [2018-03-29 21:27:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1577 [2018-03-29 21:27:10,407 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:27:10,408 INFO L355 BasicCegarLoop]: trace histogram [152, 136, 135, 135, 135, 135, 135, 135, 135, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:27:10,408 INFO L408 AbstractCegarLoop]: === Iteration 47 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:27:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash 781148069, now seen corresponding path program 29 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 [2018-03-29 21:27:10,430 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:27:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:27:10,692 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:27:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 88842 backedges. 17072 proven. 990 refuted. 0 times theorem prover too weak. 70780 trivial. 0 not checked. [2018-03-29 21:27:11,743 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:27:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 88842 backedges. 17072 proven. 990 refuted. 0 times theorem prover too weak. 70780 trivial. 0 not checked. [2018-03-29 21:27:13,618 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:27:13,618 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-03-29 21:27:13,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-03-29 21:27:13,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-03-29 21:27:13,620 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2018-03-29 21:27:13,620 INFO L87 Difference]: Start difference. First operand 1764 states and 1781 transitions. Second operand 64 states. [2018-03-29 21:27:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-29 21:27:19,173 INFO L93 Difference]: Finished difference Result 1977 states and 2249 transitions. [2018-03-29 21:27:19,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-03-29 21:27:19,174 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 1576 [2018-03-29 21:27:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-29 21:27:19,181 INFO L225 Difference]: With dead ends: 1977 [2018-03-29 21:27:19,181 INFO L226 Difference]: Without dead ends: 1976 [2018-03-29 21:27:19,183 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3239 GetRequests, 3103 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3452 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4624, Invalid=14282, Unknown=0, NotChecked=0, Total=18906 [2018-03-29 21:27:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2018-03-29 21:27:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1907. [2018-03-29 21:27:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1907 states. [2018-03-29 21:27:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 1955 transitions. [2018-03-29 21:27:19,234 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 1955 transitions. Word has length 1576 [2018-03-29 21:27:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-29 21:27:19,235 INFO L459 AbstractCegarLoop]: Abstraction has 1907 states and 1955 transitions. [2018-03-29 21:27:19,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-03-29 21:27:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 1955 transitions. [2018-03-29 21:27:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2018-03-29 21:27:19,249 INFO L347 BasicCegarLoop]: Found error trace [2018-03-29 21:27:19,250 INFO L355 BasicCegarLoop]: trace histogram [152, 136, 136, 135, 135, 135, 135, 135, 135, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-29 21:27:19,250 INFO L408 AbstractCegarLoop]: === Iteration 48 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__fooErr2RequiresViolation, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-29 21:27:19,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1554213585, now seen corresponding path program 4 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 [2018-03-29 21:27:19,256 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-29 21:27:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-29 21:27:19,565 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-29 21:27:19,567 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 [2018-03-29 21:27:19,568 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-29 21:27:19,572 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-29 21:27:19,572 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-29 21:27:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 88977 backedges. 17272 proven. 1037 refuted. 0 times theorem prover too weak. 70668 trivial. 0 not checked. [2018-03-29 21:27:23,978 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-29 21:27:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 88977 backedges. 17272 proven. 1037 refuted. 0 times theorem prover too weak. 70668 trivial. 0 not checked. [2018-03-29 21:27:26,724 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-29 21:27:26,724 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 72 [2018-03-29 21:27:26,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-03-29 21:27:26,725 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-03-29 21:27:26,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=4531, Unknown=0, NotChecked=0, Total=5256 [2018-03-29 21:27:26,726 INFO L87 Difference]: Start difference. First operand 1907 states and 1955 transitions. Second operand 73 states. [2018-03-29 21:27:30,131 WARN L151 SmtUtils]: Spent 102ms on a formula simplification. DAG size of input: 124 DAG size of output 27 [2018-03-29 21:27:30,485 WARN L151 SmtUtils]: Spent 100ms on a formula simplification. DAG size of input: 120 DAG size of output 26 Received shutdown request... [2018-03-29 21:27:33,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-03-29 21:27:33,562 WARN L519 AbstractCegarLoop]: Verification canceled [2018-03-29 21:27:33,566 WARN L197 ceAbstractionStarter]: Timeout [2018-03-29 21:27:33,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.03 09:27:33 BoogieIcfgContainer [2018-03-29 21:27:33,566 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-03-29 21:27:33,567 INFO L168 Benchmark]: Toolchain (without parser) took 124658.46 ms. Allocated memory was 297.3 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 240.4 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 542.2 MB. Max. memory is 5.3 GB. [2018-03-29 21:27:33,569 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 297.3 MB. Free memory is still 259.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-03-29 21:27:33,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.30 ms. Allocated memory is still 297.3 MB. Free memory was 239.4 MB in the beginning and 230.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 5.3 GB. [2018-03-29 21:27:33,569 INFO L168 Benchmark]: Boogie Preprocessor took 34.54 ms. Allocated memory is still 297.3 MB. Free memory was 230.4 MB in the beginning and 228.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-03-29 21:27:33,570 INFO L168 Benchmark]: RCFGBuilder took 343.02 ms. Allocated memory was 297.3 MB in the beginning and 455.1 MB in the end (delta: 157.8 MB). Free memory was 228.4 MB in the beginning and 421.4 MB in the end (delta: -193.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 5.3 GB. [2018-03-29 21:27:33,570 INFO L168 Benchmark]: TraceAbstraction took 124076.44 ms. Allocated memory was 455.1 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 420.0 MB in the beginning and 1.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 564.0 MB. Max. memory is 5.3 GB. [2018-03-29 21:27:33,573 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 297.3 MB. Free memory is still 259.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 198.30 ms. Allocated memory is still 297.3 MB. Free memory was 239.4 MB in the beginning and 230.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 34.54 ms. Allocated memory is still 297.3 MB. Free memory was 230.4 MB in the beginning and 228.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 343.02 ms. Allocated memory was 297.3 MB in the beginning and 455.1 MB in the end (delta: 157.8 MB). Free memory was 228.4 MB in the beginning and 421.4 MB in the end (delta: -193.0 MB). Peak memory consumption was 24.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 124076.44 ms. Allocated memory was 455.1 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 420.0 MB in the beginning and 1.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 564.0 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 16). Cancelled while BasicCegarLoop was constructing difference of abstraction (1907states) and interpolant automaton (currently 74 states, 73 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 143 known predicates. - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 16). Cancelled while BasicCegarLoop was constructing difference of abstraction (1907states) and interpolant automaton (currently 74 states, 73 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 143 known predicates. - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 16). Cancelled while BasicCegarLoop was constructing difference of abstraction (1907states) and interpolant automaton (currently 74 states, 73 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 143 known predicates. - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 30). Cancelled while BasicCegarLoop was constructing difference of abstraction (1907states) and interpolant automaton (currently 74 states, 73 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 143 known predicates. - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 21). Cancelled while BasicCegarLoop was constructing difference of abstraction (1907states) and interpolant automaton (currently 74 states, 73 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 143 known predicates. - TimeoutResultAtElement [Line: 27]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 27). Cancelled while BasicCegarLoop was constructing difference of abstraction (1907states) and interpolant automaton (currently 74 states, 73 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 143 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 6 error locations. TIMEOUT Result, 124.0s OverallTime, 48 OverallIterations, 152 TraceHistogramMax, 55.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4019 SDtfs, 14223 SDslu, 49546 SDs, 0 SdLazy, 46074 SolverSat, 3439 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54502 GetRequests, 50198 SyntacticMatches, 633 SemanticMatches, 3670 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128004 ImplicationChecksByTransitivity, 66.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1907occurred in iteration=47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 47 MinimizatonAttempts, 629 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 61.0s InterpolantComputationTime, 26392 NumberOfCodeBlocks, 26392 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 52688 ConstructedInterpolants, 1715 QuantifiedInterpolants, 113202381 SizeOfPredicates, 1212 NumberOfNonLiveVariables, 49104 ConjunctsInSsa, 1474 ConjunctsInUnsatCore, 96 InterpolantComputations, 10 PerfectInterpolantSequences, 1695220/1726948 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/ArraysOfVariableLength5_true-valid-memsafety.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf_AutomizerC.xml/Csv-Benchmark-0-2018-03-29_21-27-33-582.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength5_true-valid-memsafety.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-03-29_21-27-33-582.csv Completed graceful shutdown