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 0.1.23-8168ed2-m [2018-04-11 22:21:52,122 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-04-11 22:21:52,124 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-04-11 22:21:52,137 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-04-11 22:21:52,137 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-04-11 22:21:52,138 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-04-11 22:21:52,139 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-04-11 22:21:52,141 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-04-11 22:21:52,143 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-04-11 22:21:52,144 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-04-11 22:21:52,145 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-04-11 22:21:52,145 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-04-11 22:21:52,146 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-04-11 22:21:52,147 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-04-11 22:21:52,148 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-04-11 22:21:52,150 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-04-11 22:21:52,152 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-04-11 22:21:52,154 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-04-11 22:21:52,155 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-04-11 22:21:52,156 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-04-11 22:21:52,159 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-04-11 22:21:52,159 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-04-11 22:21:52,159 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-04-11 22:21:52,160 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-04-11 22:21:52,161 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-04-11 22:21:52,163 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-04-11 22:21:52,163 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-04-11 22:21:52,164 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-04-11 22:21:52,164 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-04-11 22:21:52,165 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-04-11 22:21:52,165 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-04-11 22:21:52,166 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 [2018-04-11 22:21:52,188 INFO L110 SettingsManager]: Loading preferences was successful [2018-04-11 22:21:52,188 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-04-11 22:21:52,188 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-04-11 22:21:52,189 INFO L133 SettingsManager]: * ultimate.logging.details=de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation=DEBUG; [2018-04-11 22:21:52,189 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-04-11 22:21:52,189 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-04-11 22:21:52,190 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-04-11 22:21:52,190 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-04-11 22:21:52,190 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-04-11 22:21:52,190 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-04-11 22:21:52,190 INFO L131 SettingsManager]: Preferences of LTL2Aut differ from their defaults: [2018-04-11 22:21:52,190 INFO L133 SettingsManager]: * Property to check=[] a a: x > 42 [2018-04-11 22:21:52,191 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-04-11 22:21:52,191 INFO L133 SettingsManager]: * sizeof long=4 [2018-04-11 22:21:52,191 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-04-11 22:21:52,191 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-04-11 22:21:52,191 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-04-11 22:21:52,191 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-04-11 22:21:52,192 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-04-11 22:21:52,192 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-04-11 22:21:52,192 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-04-11 22:21:52,192 INFO L133 SettingsManager]: * sizeof long double=12 [2018-04-11 22:21:52,192 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-04-11 22:21:52,193 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-04-11 22:21:52,193 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-04-11 22:21:52,193 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-04-11 22:21:52,193 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-11 22:21:52,193 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-04-11 22:21:52,194 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-04-11 22:21:52,194 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-04-11 22:21:52,194 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-04-11 22:21:52,194 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-04-11 22:21:52,194 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:21:52,194 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-04-11 22:21:52,195 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-04-11 22:21:52,195 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-04-11 22:21:52,195 INFO L131 SettingsManager]: Preferences of Boogie Printer differ from their defaults: [2018-04-11 22:21:52,196 INFO L133 SettingsManager]: * Dump path:=C:\Users\alex\AppData\Local\Temp\ [2018-04-11 22:21:52,228 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-04-11 22:21:52,238 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-04-11 22:21:52,241 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-04-11 22:21:52,242 INFO L271 PluginConnector]: Initializing CDTParser... [2018-04-11 22:21:52,242 INFO L276 PluginConnector]: CDTParser initialized [2018-04-11 22:21:52,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-11 22:21:52,525 INFO L225 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG098446dd6 [2018-04-11 22:21:52,655 INFO L287 CDTParser]: IsIndexed: true [2018-04-11 22:21:52,655 INFO L288 CDTParser]: Found 1 translation units. [2018-04-11 22:21:52,656 INFO L168 CDTParser]: Scanning ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-11 22:21:52,656 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-04-11 22:21:52,657 INFO L215 ultiparseSymbolTable]: [2018-04-11 22:21:52,657 INFO L218 ultiparseSymbolTable]: Function table: [2018-04-11 22:21:52,657 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__foo ('foo') in ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-11 22:21:52,657 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-11 22:21:52,657 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-04-11 22:21:52,657 INFO L233 ultiparseSymbolTable]: [2018-04-11 22:21:52,673 INFO L330 CDTParser]: Deleted temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG098446dd6 [2018-04-11 22:21:52,678 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-04-11 22:21:52,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-04-11 22:21:52,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-04-11 22:21:52,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-04-11 22:21:52,686 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-04-11 22:21:52,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.04 10:21:52" (1/1) ... [2018-04-11 22:21:52,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c8c263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52, skipping insertion in model container [2018-04-11 22:21:52,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.04 10:21:52" (1/1) ... [2018-04-11 22:21:52,703 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-11 22:21:52,715 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-11 22:21:52,839 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-11 22:21:52,863 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-11 22:21:52,868 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 9 non ball SCCs. Number of states in SCCs 9. [2018-04-11 22:21:52,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52 WrapperNode [2018-04-11 22:21:52,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-04-11 22:21:52,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-04-11 22:21:52,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-04-11 22:21:52,878 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-04-11 22:21:52,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52" (1/1) ... [2018-04-11 22:21:52,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52" (1/1) ... [2018-04-11 22:21:52,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52" (1/1) ... [2018-04-11 22:21:52,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52" (1/1) ... [2018-04-11 22:21:52,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52" (1/1) ... [2018-04-11 22:21:52,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52" (1/1) ... [2018-04-11 22:21:52,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52" (1/1) ... [2018-04-11 22:21:52,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-04-11 22:21:52,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-04-11 22:21:52,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-04-11 22:21:52,912 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-04-11 22:21:52,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52" (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 [2018-04-11 22:21:52,967 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-04-11 22:21:52,967 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-04-11 22:21:52,968 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__foo [2018-04-11 22:21:52,968 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-04-11 22:21:52,968 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__foo [2018-04-11 22:21:52,968 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-04-11 22:21:52,968 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-04-11 22:21:52,968 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-04-11 22:21:52,969 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-04-11 22:21:52,969 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-04-11 22:21:52,969 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-04-11 22:21:52,969 INFO L128 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-04-11 22:21:52,969 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-04-11 22:21:53,264 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-04-11 22:21:53,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.04 10:21:53 BoogieIcfgContainer [2018-04-11 22:21:53,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-04-11 22:21:53,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-04-11 22:21:53,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-04-11 22:21:53,269 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-04-11 22:21:53,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.04 10:21:52" (1/3) ... [2018-04-11 22:21:53,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38194bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.04 10:21:53, skipping insertion in model container [2018-04-11 22:21:53,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:21:52" (2/3) ... [2018-04-11 22:21:53,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38194bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.04 10:21:53, skipping insertion in model container [2018-04-11 22:21:53,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.04 10:21:53" (3/3) ... [2018-04-11 22:21:53,272 INFO L107 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-11 22:21:53,279 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-04-11 22:21:53,289 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-04-11 22:21:53,328 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-04-11 22:21:53,328 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-04-11 22:21:53,328 INFO L370 AbstractCegarLoop]: Hoare is true [2018-04-11 22:21:53,328 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-04-11 22:21:53,329 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-04-11 22:21:53,329 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-04-11 22:21:53,329 INFO L374 AbstractCegarLoop]: Difference is false [2018-04-11 22:21:53,329 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-04-11 22:21:53,329 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-04-11 22:21:53,330 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-04-11 22:21:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-04-11 22:21:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-04-11 22:21:53,349 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:53,350 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:21:53,350 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]=== [2018-04-11 22:21:53,356 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 [2018-04-11 22:21:53,377 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:53,413 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:53,470 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:53,516 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-11 22:21:53,516 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2018-04-11 22:21:53,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-11 22:21:53,528 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-11 22:21:53,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-11 22:21:53,530 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 4 states. [2018-04-11 22:21:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:53,655 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2018-04-11 22:21:53,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-11 22:21:53,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-04-11 22:21:53,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:53,669 INFO L225 Difference]: With dead ends: 141 [2018-04-11 22:21:53,670 INFO L226 Difference]: Without dead ends: 84 [2018-04-11 22:21:53,674 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 [2018-04-11 22:21:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-04-11 22:21:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2018-04-11 22:21:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-04-11 22:21:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2018-04-11 22:21:53,721 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 16 [2018-04-11 22:21:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:53,722 INFO L459 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2018-04-11 22:21:53,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-11 22:21:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2018-04-11 22:21:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-04-11 22:21:53,723 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:53,723 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] [2018-04-11 22:21:53,723 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]=== [2018-04-11 22:21:53,723 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 [2018-04-11 22:21:53,735 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:53,758 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:53,779 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:53,835 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-11 22:21:53,835 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2018-04-11 22:21:53,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-11 22:21:53,837 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-11 22:21:53,837 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-11 22:21:53,837 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 4 states. [2018-04-11 22:21:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:53,875 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2018-04-11 22:21:53,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-04-11 22:21:53,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-04-11 22:21:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:53,878 INFO L225 Difference]: With dead ends: 82 [2018-04-11 22:21:53,878 INFO L226 Difference]: Without dead ends: 81 [2018-04-11 22:21:53,879 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 [2018-04-11 22:21:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-04-11 22:21:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2018-04-11 22:21:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-04-11 22:21:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2018-04-11 22:21:53,887 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 25 [2018-04-11 22:21:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:53,888 INFO L459 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2018-04-11 22:21:53,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-11 22:21:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2018-04-11 22:21:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-04-11 22:21:53,889 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:53,889 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] [2018-04-11 22:21:53,889 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]=== [2018-04-11 22:21:53,889 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 [2018-04-11 22:21:53,900 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:53,918 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:54,000 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:54,077 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-11 22:21:54,078 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2018-04-11 22:21:54,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-11 22:21:54,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-11 22:21:54,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-04-11 22:21:54,079 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 7 states. [2018-04-11 22:21:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:54,175 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2018-04-11 22:21:54,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-04-11 22:21:54,176 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-04-11 22:21:54,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:54,178 INFO L225 Difference]: With dead ends: 150 [2018-04-11 22:21:54,178 INFO L226 Difference]: Without dead ends: 95 [2018-04-11 22:21:54,179 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-04-11 22:21:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-04-11 22:21:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2018-04-11 22:21:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-04-11 22:21:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2018-04-11 22:21:54,190 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 26 [2018-04-11 22:21:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:54,190 INFO L459 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2018-04-11 22:21:54,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-11 22:21:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2018-04-11 22:21:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-04-11 22:21:54,192 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:54,192 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] [2018-04-11 22:21:54,193 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]=== [2018-04-11 22:21:54,193 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 [2018-04-11 22:21:54,201 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:54,222 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:54,274 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:54,367 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-11 22:21:54,368 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-04-11 22:21:54,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-04-11 22:21:54,369 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-04-11 22:21:54,369 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-04-11 22:21:54,369 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 9 states. [2018-04-11 22:21:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:54,474 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2018-04-11 22:21:54,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-04-11 22:21:54,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-04-11 22:21:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:54,476 INFO L225 Difference]: With dead ends: 97 [2018-04-11 22:21:54,476 INFO L226 Difference]: Without dead ends: 96 [2018-04-11 22:21:54,477 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 [2018-04-11 22:21:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-04-11 22:21:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2018-04-11 22:21:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-04-11 22:21:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2018-04-11 22:21:54,487 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 37 [2018-04-11 22:21:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:54,487 INFO L459 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2018-04-11 22:21:54,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-04-11 22:21:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2018-04-11 22:21:54,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-04-11 22:21:54,489 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:54,489 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] [2018-04-11 22:21:54,490 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]=== [2018-04-11 22:21:54,490 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 [2018-04-11 22:21:54,506 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:54,525 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:54,547 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:54,624 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:54,624 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-04-11 22:21:54,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-11 22:21:54,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-11 22:21:54,625 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-04-11 22:21:54,625 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 8 states. [2018-04-11 22:21:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:54,754 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2018-04-11 22:21:54,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-11 22:21:54,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2018-04-11 22:21:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:54,756 INFO L225 Difference]: With dead ends: 130 [2018-04-11 22:21:54,756 INFO L226 Difference]: Without dead ends: 110 [2018-04-11 22:21:54,757 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 [2018-04-11 22:21:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-04-11 22:21:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-04-11 22:21:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-04-11 22:21:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2018-04-11 22:21:54,767 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 44 [2018-04-11 22:21:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:54,768 INFO L459 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2018-04-11 22:21:54,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-11 22:21:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2018-04-11 22:21:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-04-11 22:21:54,770 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:54,770 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] [2018-04-11 22:21:54,771 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]=== [2018-04-11 22:21:54,771 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 [2018-04-11 22:21:54,780 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:54,801 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:54,824 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-04-11 22:21:54,826 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-11 22:21:54,827 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-11 22:21:54,828 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-04-11 22:21:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-11 22:21:54,881 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-11 22:21:54,924 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:54,924 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2018-04-11 22:21:54,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-11 22:21:54,925 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-11 22:21:54,925 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-04-11 22:21:54,925 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 7 states. [2018-04-11 22:21:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:55,033 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2018-04-11 22:21:55,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-11 22:21:55,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2018-04-11 22:21:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:55,035 INFO L225 Difference]: With dead ends: 100 [2018-04-11 22:21:55,036 INFO L226 Difference]: Without dead ends: 99 [2018-04-11 22:21:55,036 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 [2018-04-11 22:21:55,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-04-11 22:21:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-04-11 22:21:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-04-11 22:21:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2018-04-11 22:21:55,045 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 47 [2018-04-11 22:21:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:55,046 INFO L459 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2018-04-11 22:21:55,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-11 22:21:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2018-04-11 22:21:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-04-11 22:21:55,047 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:55,048 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] [2018-04-11 22:21:55,048 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]=== [2018-04-11 22:21:55,048 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 [2018-04-11 22:21:55,058 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:55,080 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:55,097 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-04-11 22:21:55,098 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-11 22:21:55,103 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-11 22:21:55,103 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-11 22:21:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-11 22:21:55,160 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-11 22:21:55,234 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:55,234 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2018-04-11 22:21:55,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-04-11 22:21:55,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-04-11 22:21:55,234 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-04-11 22:21:55,235 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 13 states. [2018-04-11 22:21:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:55,363 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2018-04-11 22:21:55,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-11 22:21:55,363 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-04-11 22:21:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:55,364 INFO L225 Difference]: With dead ends: 108 [2018-04-11 22:21:55,364 INFO L226 Difference]: Without dead ends: 107 [2018-04-11 22:21:55,365 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 [2018-04-11 22:21:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-04-11 22:21:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-04-11 22:21:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-04-11 22:21:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2018-04-11 22:21:55,376 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 47 [2018-04-11 22:21:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:55,376 INFO L459 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2018-04-11 22:21:55,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-04-11 22:21:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2018-04-11 22:21:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-04-11 22:21:55,378 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:55,378 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] [2018-04-11 22:21:55,378 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]=== [2018-04-11 22:21:55,378 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 [2018-04-11 22:21:55,387 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:55,409 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:55,472 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 22:21:55,542 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:55,543 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-04-11 22:21:55,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-04-11 22:21:55,543 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-04-11 22:21:55,543 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-04-11 22:21:55,544 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 13 states. [2018-04-11 22:21:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:55,695 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2018-04-11 22:21:55,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-04-11 22:21:55,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-04-11 22:21:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:55,696 INFO L225 Difference]: With dead ends: 192 [2018-04-11 22:21:55,696 INFO L226 Difference]: Without dead ends: 130 [2018-04-11 22:21:55,697 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 [2018-04-11 22:21:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-04-11 22:21:55,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2018-04-11 22:21:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-04-11 22:21:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2018-04-11 22:21:55,705 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 55 [2018-04-11 22:21:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:55,706 INFO L459 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2018-04-11 22:21:55,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-04-11 22:21:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2018-04-11 22:21:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-04-11 22:21:55,707 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:55,707 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] [2018-04-11 22:21:55,707 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]=== [2018-04-11 22:21:55,707 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 [2018-04-11 22:21:55,713 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:55,740 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-04-11 22:21:55,778 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-04-11 22:21:55,907 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-11 22:21:55,907 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2018-04-11 22:21:55,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-04-11 22:21:55,908 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-04-11 22:21:55,908 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-04-11 22:21:55,908 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand 10 states. [2018-04-11 22:21:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:56,041 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2018-04-11 22:21:56,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-04-11 22:21:56,041 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2018-04-11 22:21:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:56,042 INFO L225 Difference]: With dead ends: 201 [2018-04-11 22:21:56,042 INFO L226 Difference]: Without dead ends: 133 [2018-04-11 22:21:56,043 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 [2018-04-11 22:21:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-04-11 22:21:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-04-11 22:21:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-04-11 22:21:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2018-04-11 22:21:56,050 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 76 [2018-04-11 22:21:56,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:56,050 INFO L459 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2018-04-11 22:21:56,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-04-11 22:21:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2018-04-11 22:21:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-04-11 22:21:56,052 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:56,052 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] [2018-04-11 22:21:56,052 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]=== [2018-04-11 22:21:56,052 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 [2018-04-11 22:21:56,062 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:56,085 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-04-11 22:21:56,100 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-04-11 22:21:56,159 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:56,159 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-04-11 22:21:56,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-11 22:21:56,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-11 22:21:56,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-04-11 22:21:56,160 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 8 states. [2018-04-11 22:21:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:56,248 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2018-04-11 22:21:56,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-11 22:21:56,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2018-04-11 22:21:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:56,250 INFO L225 Difference]: With dead ends: 150 [2018-04-11 22:21:56,250 INFO L226 Difference]: Without dead ends: 149 [2018-04-11 22:21:56,250 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 [2018-04-11 22:21:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-04-11 22:21:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2018-04-11 22:21:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-04-11 22:21:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2018-04-11 22:21:56,256 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 85 [2018-04-11 22:21:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:56,257 INFO L459 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2018-04-11 22:21:56,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-11 22:21:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2018-04-11 22:21:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-04-11 22:21:56,258 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:56,258 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] [2018-04-11 22:21:56,258 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]=== [2018-04-11 22:21:56,258 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 [2018-04-11 22:21:56,264 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:56,285 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:56,291 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-04-11 22:21:56,292 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-11 22:21:56,296 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-11 22:21:56,296 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-11 22:21:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-04-11 22:21:56,446 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-04-11 22:21:56,609 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:56,609 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2018-04-11 22:21:56,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-04-11 22:21:56,609 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-04-11 22:21:56,610 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-04-11 22:21:56,610 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 17 states. [2018-04-11 22:21:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:56,875 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2018-04-11 22:21:56,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-04-11 22:21:56,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 86 [2018-04-11 22:21:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:56,877 INFO L225 Difference]: With dead ends: 144 [2018-04-11 22:21:56,877 INFO L226 Difference]: Without dead ends: 143 [2018-04-11 22:21:56,877 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 [2018-04-11 22:21:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-04-11 22:21:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2018-04-11 22:21:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-04-11 22:21:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2018-04-11 22:21:56,885 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 86 [2018-04-11 22:21:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:56,886 INFO L459 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2018-04-11 22:21:56,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-04-11 22:21:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2018-04-11 22:21:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-04-11 22:21:56,887 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:56,888 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] [2018-04-11 22:21:56,888 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]=== [2018-04-11 22:21:56,888 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 [2018-04-11 22:21:56,898 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:56,925 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 91 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-11 22:21:57,007 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 91 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-11 22:21:57,106 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:57,106 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-04-11 22:21:57,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-11 22:21:57,107 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-11 22:21:57,107 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-04-11 22:21:57,107 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand 19 states. [2018-04-11 22:21:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:57,391 INFO L93 Difference]: Finished difference Result 256 states and 269 transitions. [2018-04-11 22:21:57,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-11 22:21:57,392 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 103 [2018-04-11 22:21:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:57,394 INFO L225 Difference]: With dead ends: 256 [2018-04-11 22:21:57,394 INFO L226 Difference]: Without dead ends: 184 [2018-04-11 22:21:57,395 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 [2018-04-11 22:21:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-04-11 22:21:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2018-04-11 22:21:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-04-11 22:21:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2018-04-11 22:21:57,407 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 103 [2018-04-11 22:21:57,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:57,408 INFO L459 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2018-04-11 22:21:57,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-11 22:21:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2018-04-11 22:21:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-04-11 22:21:57,409 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:57,409 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] [2018-04-11 22:21:57,409 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]=== [2018-04-11 22:21:57,410 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 [2018-04-11 22:21:57,418 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:57,444 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-04-11 22:21:57,504 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-04-11 22:21:57,661 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:57,662 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-04-11 22:21:57,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-11 22:21:57,662 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-11 22:21:57,663 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-04-11 22:21:57,663 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 16 states. [2018-04-11 22:21:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:58,029 INFO L93 Difference]: Finished difference Result 256 states and 266 transitions. [2018-04-11 22:21:58,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-04-11 22:21:58,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2018-04-11 22:21:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:58,030 INFO L225 Difference]: With dead ends: 256 [2018-04-11 22:21:58,030 INFO L226 Difference]: Without dead ends: 178 [2018-04-11 22:21:58,031 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 187 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2018-04-11 22:21:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-04-11 22:21:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2018-04-11 22:21:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-04-11 22:21:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2018-04-11 22:21:58,039 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 104 [2018-04-11 22:21:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:58,039 INFO L459 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2018-04-11 22:21:58,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-11 22:21:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2018-04-11 22:21:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-04-11 22:21:58,040 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:58,040 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] [2018-04-11 22:21:58,040 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]=== [2018-04-11 22:21:58,040 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 [2018-04-11 22:21:58,049 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:58,086 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-11 22:21:58,125 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-11 22:21:58,222 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:58,223 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-04-11 22:21:58,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-11 22:21:58,223 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-11 22:21:58,223 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-04-11 22:21:58,223 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 16 states. [2018-04-11 22:21:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:58,376 INFO L93 Difference]: Finished difference Result 239 states and 250 transitions. [2018-04-11 22:21:58,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-11 22:21:58,377 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 113 [2018-04-11 22:21:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:58,378 INFO L225 Difference]: With dead ends: 239 [2018-04-11 22:21:58,378 INFO L226 Difference]: Without dead ends: 219 [2018-04-11 22:21:58,379 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 [2018-04-11 22:21:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-04-11 22:21:58,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 209. [2018-04-11 22:21:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-04-11 22:21:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 216 transitions. [2018-04-11 22:21:58,388 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 216 transitions. Word has length 113 [2018-04-11 22:21:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:58,389 INFO L459 AbstractCegarLoop]: Abstraction has 209 states and 216 transitions. [2018-04-11 22:21:58,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-11 22:21:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 216 transitions. [2018-04-11 22:21:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-04-11 22:21:58,391 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:58,391 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] [2018-04-11 22:21:58,391 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]=== [2018-04-11 22:21:58,392 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 [2018-04-11 22:21:58,404 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:58,442 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 165 proven. 48 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-11 22:21:58,568 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 165 proven. 48 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-11 22:21:58,710 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:58,711 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2018-04-11 22:21:58,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-11 22:21:58,711 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-11 22:21:58,712 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-04-11 22:21:58,712 INFO L87 Difference]: Start difference. First operand 209 states and 216 transitions. Second operand 25 states. [2018-04-11 22:21:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:59,098 INFO L93 Difference]: Finished difference Result 359 states and 374 transitions. [2018-04-11 22:21:59,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-04-11 22:21:59,099 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 142 [2018-04-11 22:21:59,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:59,101 INFO L225 Difference]: With dead ends: 359 [2018-04-11 22:21:59,101 INFO L226 Difference]: Without dead ends: 257 [2018-04-11 22:21:59,103 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 [2018-04-11 22:21:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-04-11 22:21:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 246. [2018-04-11 22:21:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-04-11 22:21:59,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 253 transitions. [2018-04-11 22:21:59,118 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 253 transitions. Word has length 142 [2018-04-11 22:21:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:59,118 INFO L459 AbstractCegarLoop]: Abstraction has 246 states and 253 transitions. [2018-04-11 22:21:59,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-11 22:21:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 253 transitions. [2018-04-11 22:21:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-04-11 22:21:59,120 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:59,120 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] [2018-04-11 22:21:59,120 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]=== [2018-04-11 22:21:59,121 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 [2018-04-11 22:21:59,130 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:59,176 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:21:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 384 proven. 13 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-04-11 22:21:59,309 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:21:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 384 proven. 13 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-04-11 22:21:59,539 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:21:59,539 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-04-11 22:21:59,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-04-11 22:21:59,539 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-04-11 22:21:59,540 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-04-11 22:21:59,540 INFO L87 Difference]: Start difference. First operand 246 states and 253 transitions. Second operand 22 states. [2018-04-11 22:21:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:21:59,885 INFO L93 Difference]: Finished difference Result 368 states and 382 transitions. [2018-04-11 22:21:59,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-04-11 22:21:59,885 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 181 [2018-04-11 22:21:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:21:59,887 INFO L225 Difference]: With dead ends: 368 [2018-04-11 22:21:59,887 INFO L226 Difference]: Without dead ends: 260 [2018-04-11 22:21:59,888 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 [2018-04-11 22:21:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-04-11 22:21:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 246. [2018-04-11 22:21:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-04-11 22:21:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2018-04-11 22:21:59,897 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 181 [2018-04-11 22:21:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:21:59,898 INFO L459 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2018-04-11 22:21:59,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-04-11 22:21:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2018-04-11 22:21:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-04-11 22:21:59,898 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:21:59,899 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] [2018-04-11 22:21:59,899 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]=== [2018-04-11 22:21:59,899 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 [2018-04-11 22:21:59,906 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:21:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:21:59,959 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 212 proven. 36 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2018-04-11 22:22:00,011 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 212 proven. 36 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2018-04-11 22:22:00,124 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:00,124 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-04-11 22:22:00,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-11 22:22:00,125 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-11 22:22:00,125 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-04-11 22:22:00,125 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 16 states. [2018-04-11 22:22:00,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:00,406 INFO L93 Difference]: Finished difference Result 303 states and 323 transitions. [2018-04-11 22:22:00,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-11 22:22:00,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 190 [2018-04-11 22:22:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:00,409 INFO L225 Difference]: With dead ends: 303 [2018-04-11 22:22:00,409 INFO L226 Difference]: Without dead ends: 302 [2018-04-11 22:22:00,410 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 [2018-04-11 22:22:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-04-11 22:22:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 281. [2018-04-11 22:22:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-04-11 22:22:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 293 transitions. [2018-04-11 22:22:00,425 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 293 transitions. Word has length 190 [2018-04-11 22:22:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:00,426 INFO L459 AbstractCegarLoop]: Abstraction has 281 states and 293 transitions. [2018-04-11 22:22:00,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-11 22:22:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 293 transitions. [2018-04-11 22:22:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-04-11 22:22:00,428 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:00,428 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] [2018-04-11 22:22:00,428 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]=== [2018-04-11 22:22:00,428 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 [2018-04-11 22:22:00,441 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:00,503 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:00,508 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-04-11 22:22:00,509 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-11 22:22:00,530 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-11 22:22:00,530 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-11 22:22:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 238 proven. 47 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-04-11 22:22:00,970 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 238 proven. 47 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-04-11 22:22:01,289 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:01,289 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-04-11 22:22:01,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-11 22:22:01,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-11 22:22:01,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2018-04-11 22:22:01,290 INFO L87 Difference]: Start difference. First operand 281 states and 293 transitions. Second operand 25 states. [2018-04-11 22:22:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:02,103 INFO L93 Difference]: Finished difference Result 295 states and 315 transitions. [2018-04-11 22:22:02,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-04-11 22:22:02,103 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 191 [2018-04-11 22:22:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:02,105 INFO L225 Difference]: With dead ends: 295 [2018-04-11 22:22:02,105 INFO L226 Difference]: Without dead ends: 294 [2018-04-11 22:22:02,106 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 [2018-04-11 22:22:02,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-04-11 22:22:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 282. [2018-04-11 22:22:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-04-11 22:22:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 291 transitions. [2018-04-11 22:22:02,117 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 291 transitions. Word has length 191 [2018-04-11 22:22:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:02,117 INFO L459 AbstractCegarLoop]: Abstraction has 282 states and 291 transitions. [2018-04-11 22:22:02,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-11 22:22:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 291 transitions. [2018-04-11 22:22:02,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-04-11 22:22:02,118 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:02,118 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] [2018-04-11 22:22:02,118 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]=== [2018-04-11 22:22:02,119 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 [2018-04-11 22:22:02,134 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:02,177 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 660 proven. 86 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-04-11 22:22:02,374 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 660 proven. 86 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-04-11 22:22:02,614 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:02,626 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2018-04-11 22:22:02,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-04-11 22:22:02,627 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-04-11 22:22:02,627 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2018-04-11 22:22:02,628 INFO L87 Difference]: Start difference. First operand 282 states and 291 transitions. Second operand 31 states. [2018-04-11 22:22:03,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:03,113 INFO L93 Difference]: Finished difference Result 466 states and 485 transitions. [2018-04-11 22:22:03,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-04-11 22:22:03,114 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 226 [2018-04-11 22:22:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:03,117 INFO L225 Difference]: With dead ends: 466 [2018-04-11 22:22:03,117 INFO L226 Difference]: Without dead ends: 339 [2018-04-11 22:22:03,119 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 411 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2018-04-11 22:22:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-04-11 22:22:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-04-11 22:22:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-04-11 22:22:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 337 transitions. [2018-04-11 22:22:03,137 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 337 transitions. Word has length 226 [2018-04-11 22:22:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:03,138 INFO L459 AbstractCegarLoop]: Abstraction has 328 states and 337 transitions. [2018-04-11 22:22:03,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-04-11 22:22:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 337 transitions. [2018-04-11 22:22:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-04-11 22:22:03,140 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:03,140 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] [2018-04-11 22:22:03,140 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]=== [2018-04-11 22:22:03,141 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 [2018-04-11 22:22:03,153 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:03,231 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 1064 proven. 33 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-04-11 22:22:03,427 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 1064 proven. 33 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-04-11 22:22:03,671 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:03,671 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2018-04-11 22:22:03,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-04-11 22:22:03,672 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-04-11 22:22:03,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2018-04-11 22:22:03,673 INFO L87 Difference]: Start difference. First operand 328 states and 337 transitions. Second operand 28 states. [2018-04-11 22:22:04,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:04,024 INFO L93 Difference]: Finished difference Result 471 states and 488 transitions. [2018-04-11 22:22:04,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-04-11 22:22:04,025 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 274 [2018-04-11 22:22:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:04,026 INFO L225 Difference]: With dead ends: 471 [2018-04-11 22:22:04,026 INFO L226 Difference]: Without dead ends: 338 [2018-04-11 22:22:04,027 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 [2018-04-11 22:22:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-04-11 22:22:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-04-11 22:22:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-04-11 22:22:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 335 transitions. [2018-04-11 22:22:04,037 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 335 transitions. Word has length 274 [2018-04-11 22:22:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:04,037 INFO L459 AbstractCegarLoop]: Abstraction has 328 states and 335 transitions. [2018-04-11 22:22:04,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-04-11 22:22:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 335 transitions. [2018-04-11 22:22:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-04-11 22:22:04,038 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:04,039 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] [2018-04-11 22:22:04,039 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]=== [2018-04-11 22:22:04,039 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 [2018-04-11 22:22:04,046 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:04,101 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 964 proven. 135 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-04-11 22:22:04,309 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 964 proven. 135 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-04-11 22:22:04,617 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:04,617 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 37 [2018-04-11 22:22:04,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-04-11 22:22:04,618 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-04-11 22:22:04,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-04-11 22:22:04,619 INFO L87 Difference]: Start difference. First operand 328 states and 335 transitions. Second operand 37 states. [2018-04-11 22:22:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:05,312 INFO L93 Difference]: Finished difference Result 510 states and 525 transitions. [2018-04-11 22:22:05,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-04-11 22:22:05,313 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 283 [2018-04-11 22:22:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:05,315 INFO L225 Difference]: With dead ends: 510 [2018-04-11 22:22:05,315 INFO L226 Difference]: Without dead ends: 394 [2018-04-11 22:22:05,316 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 517 SyntacticMatches, 13 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=779, Invalid=3913, Unknown=0, NotChecked=0, Total=4692 [2018-04-11 22:22:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-04-11 22:22:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 383. [2018-04-11 22:22:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-04-11 22:22:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 390 transitions. [2018-04-11 22:22:05,330 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 390 transitions. Word has length 283 [2018-04-11 22:22:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:05,331 INFO L459 AbstractCegarLoop]: Abstraction has 383 states and 390 transitions. [2018-04-11 22:22:05,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-04-11 22:22:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 390 transitions. [2018-04-11 22:22:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-04-11 22:22:05,333 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:05,334 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] [2018-04-11 22:22:05,334 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]=== [2018-04-11 22:22:05,334 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 [2018-04-11 22:22:05,343 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:05,420 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 1337 proven. 62 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-04-11 22:22:05,640 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 697 proven. 230 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2018-04-11 22:22:05,975 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:05,975 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2018-04-11 22:22:05,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-04-11 22:22:05,976 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-04-11 22:22:05,976 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2018-04-11 22:22:05,977 INFO L87 Difference]: Start difference. First operand 383 states and 390 transitions. Second operand 34 states. [2018-04-11 22:22:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:06,718 INFO L93 Difference]: Finished difference Result 515 states and 527 transitions. [2018-04-11 22:22:06,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-04-11 22:22:06,718 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 332 [2018-04-11 22:22:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:06,720 INFO L225 Difference]: With dead ends: 515 [2018-04-11 22:22:06,720 INFO L226 Difference]: Without dead ends: 393 [2018-04-11 22:22:06,722 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 619 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=572, Invalid=2734, Unknown=0, NotChecked=0, Total=3306 [2018-04-11 22:22:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-04-11 22:22:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 383. [2018-04-11 22:22:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-04-11 22:22:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 388 transitions. [2018-04-11 22:22:06,732 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 388 transitions. Word has length 332 [2018-04-11 22:22:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:06,733 INFO L459 AbstractCegarLoop]: Abstraction has 383 states and 388 transitions. [2018-04-11 22:22:06,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-04-11 22:22:06,733 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 388 transitions. [2018-04-11 22:22:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-04-11 22:22:06,735 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:06,735 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] [2018-04-11 22:22:06,735 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]=== [2018-04-11 22:22:06,735 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 [2018-04-11 22:22:06,741 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:06,821 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2796 backedges. 1325 proven. 195 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-04-11 22:22:07,543 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2796 backedges. 1325 proven. 195 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-04-11 22:22:07,945 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:07,949 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 43 [2018-04-11 22:22:07,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-04-11 22:22:07,950 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-04-11 22:22:07,950 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2018-04-11 22:22:07,951 INFO L87 Difference]: Start difference. First operand 383 states and 388 transitions. Second operand 43 states. [2018-04-11 22:22:08,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:08,873 INFO L93 Difference]: Finished difference Result 574 states and 587 transitions. [2018-04-11 22:22:08,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-04-11 22:22:08,873 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 349 [2018-04-11 22:22:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:08,875 INFO L225 Difference]: With dead ends: 574 [2018-04-11 22:22:08,875 INFO L226 Difference]: Without dead ends: 466 [2018-04-11 22:22:08,877 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 641 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1044, Invalid=5436, Unknown=0, NotChecked=0, Total=6480 [2018-04-11 22:22:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2018-04-11 22:22:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 450. [2018-04-11 22:22:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-04-11 22:22:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 456 transitions. [2018-04-11 22:22:08,888 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 456 transitions. Word has length 349 [2018-04-11 22:22:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:08,889 INFO L459 AbstractCegarLoop]: Abstraction has 450 states and 456 transitions. [2018-04-11 22:22:08,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-04-11 22:22:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 456 transitions. [2018-04-11 22:22:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-04-11 22:22:08,890 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:08,890 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] [2018-04-11 22:22:08,891 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]=== [2018-04-11 22:22:08,891 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 [2018-04-11 22:22:08,906 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:08,983 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 1058 proven. 100 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2018-04-11 22:22:09,375 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 1058 proven. 100 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2018-04-11 22:22:09,806 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:09,806 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 40 [2018-04-11 22:22:09,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-04-11 22:22:09,807 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-04-11 22:22:09,807 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-04-11 22:22:09,807 INFO L87 Difference]: Start difference. First operand 450 states and 456 transitions. Second operand 40 states. [2018-04-11 22:22:10,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:10,312 INFO L93 Difference]: Finished difference Result 574 states and 584 transitions. [2018-04-11 22:22:10,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-11 22:22:10,313 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 350 [2018-04-11 22:22:10,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:10,315 INFO L225 Difference]: With dead ends: 574 [2018-04-11 22:22:10,315 INFO L226 Difference]: Without dead ends: 460 [2018-04-11 22:22:10,316 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 647 SyntacticMatches, 15 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=3904, Unknown=0, NotChecked=0, Total=4692 [2018-04-11 22:22:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2018-04-11 22:22:10,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2018-04-11 22:22:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-04-11 22:22:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 454 transitions. [2018-04-11 22:22:10,327 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 454 transitions. Word has length 350 [2018-04-11 22:22:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:10,328 INFO L459 AbstractCegarLoop]: Abstraction has 450 states and 454 transitions. [2018-04-11 22:22:10,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-04-11 22:22:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 454 transitions. [2018-04-11 22:22:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-04-11 22:22:10,330 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:10,330 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] [2018-04-11 22:22:10,330 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]=== [2018-04-11 22:22:10,330 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 [2018-04-11 22:22:10,339 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:10,408 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-04-11 22:22:10,534 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-04-11 22:22:10,816 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:10,817 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-04-11 22:22:10,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-04-11 22:22:10,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-04-11 22:22:10,817 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2018-04-11 22:22:10,818 INFO L87 Difference]: Start difference. First operand 450 states and 454 transitions. Second operand 32 states. [2018-04-11 22:22:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:11,233 INFO L93 Difference]: Finished difference Result 565 states and 584 transitions. [2018-04-11 22:22:11,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-11 22:22:11,233 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 359 [2018-04-11 22:22:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:11,237 INFO L225 Difference]: With dead ends: 565 [2018-04-11 22:22:11,237 INFO L226 Difference]: Without dead ends: 545 [2018-04-11 22:22:11,238 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 [2018-04-11 22:22:11,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2018-04-11 22:22:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 535. [2018-04-11 22:22:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2018-04-11 22:22:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 546 transitions. [2018-04-11 22:22:11,262 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 546 transitions. Word has length 359 [2018-04-11 22:22:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:11,263 INFO L459 AbstractCegarLoop]: Abstraction has 535 states and 546 transitions. [2018-04-11 22:22:11,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-04-11 22:22:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 546 transitions. [2018-04-11 22:22:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-04-11 22:22:11,266 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:11,266 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] [2018-04-11 22:22:11,266 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]=== [2018-04-11 22:22:11,267 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 [2018-04-11 22:22:11,276 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:11,369 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4403 backedges. 1743 proven. 266 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-04-11 22:22:11,800 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4403 backedges. 1743 proven. 266 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-04-11 22:22:12,218 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:12,219 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 49 [2018-04-11 22:22:12,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-04-11 22:22:12,219 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-04-11 22:22:12,220 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2018-04-11 22:22:12,220 INFO L87 Difference]: Start difference. First operand 535 states and 546 transitions. Second operand 49 states. [2018-04-11 22:22:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:13,249 INFO L93 Difference]: Finished difference Result 801 states and 824 transitions. [2018-04-11 22:22:13,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-04-11 22:22:13,271 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 424 [2018-04-11 22:22:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:13,273 INFO L225 Difference]: With dead ends: 801 [2018-04-11 22:22:13,273 INFO L226 Difference]: Without dead ends: 619 [2018-04-11 22:22:13,276 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 783 SyntacticMatches, 17 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1347, Invalid=7209, Unknown=0, NotChecked=0, Total=8556 [2018-04-11 22:22:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2018-04-11 22:22:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 608. [2018-04-11 22:22:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-04-11 22:22:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 619 transitions. [2018-04-11 22:22:13,301 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 619 transitions. Word has length 424 [2018-04-11 22:22:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:13,302 INFO L459 AbstractCegarLoop]: Abstraction has 608 states and 619 transitions. [2018-04-11 22:22:13,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-04-11 22:22:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 619 transitions. [2018-04-11 22:22:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-04-11 22:22:13,306 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:13,306 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] [2018-04-11 22:22:13,307 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]=== [2018-04-11 22:22:13,307 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 [2018-04-11 22:22:13,315 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:13,458 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6379 backedges. 3614 proven. 147 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-04-11 22:22:13,895 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6379 backedges. 3614 proven. 147 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-04-11 22:22:14,536 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:14,536 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 46 [2018-04-11 22:22:14,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-04-11 22:22:14,537 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-04-11 22:22:14,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2018-04-11 22:22:14,537 INFO L87 Difference]: Start difference. First operand 608 states and 619 transitions. Second operand 46 states. [2018-04-11 22:22:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:15,241 INFO L93 Difference]: Finished difference Result 810 states and 836 transitions. [2018-04-11 22:22:15,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-04-11 22:22:15,241 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 499 [2018-04-11 22:22:15,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:15,244 INFO L225 Difference]: With dead ends: 810 [2018-04-11 22:22:15,244 INFO L226 Difference]: Without dead ends: 622 [2018-04-11 22:22:15,245 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 937 SyntacticMatches, 17 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1038, Invalid=5282, Unknown=0, NotChecked=0, Total=6320 [2018-04-11 22:22:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2018-04-11 22:22:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 608. [2018-04-11 22:22:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-04-11 22:22:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 617 transitions. [2018-04-11 22:22:15,268 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 617 transitions. Word has length 499 [2018-04-11 22:22:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:15,268 INFO L459 AbstractCegarLoop]: Abstraction has 608 states and 617 transitions. [2018-04-11 22:22:15,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-04-11 22:22:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 617 transitions. [2018-04-11 22:22:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-04-11 22:22:15,273 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:15,273 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] [2018-04-11 22:22:15,273 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]=== [2018-04-11 22:22:15,274 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 [2018-04-11 22:22:15,283 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:15,394 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6704 backedges. 1976 proven. 210 refuted. 0 times theorem prover too weak. 4518 trivial. 0 not checked. [2018-04-11 22:22:16,067 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6704 backedges. 1976 proven. 210 refuted. 0 times theorem prover too weak. 4518 trivial. 0 not checked. [2018-04-11 22:22:16,449 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:16,450 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-04-11 22:22:16,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-04-11 22:22:16,450 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-04-11 22:22:16,451 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2018-04-11 22:22:16,451 INFO L87 Difference]: Start difference. First operand 608 states and 617 transitions. Second operand 32 states. [2018-04-11 22:22:17,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:17,640 INFO L93 Difference]: Finished difference Result 717 states and 789 transitions. [2018-04-11 22:22:17,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-11 22:22:17,641 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 508 [2018-04-11 22:22:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:17,644 INFO L225 Difference]: With dead ends: 717 [2018-04-11 22:22:17,645 INFO L226 Difference]: Without dead ends: 716 [2018-04-11 22:22:17,645 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1096, Invalid=3194, Unknown=0, NotChecked=0, Total=4290 [2018-04-11 22:22:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2018-04-11 22:22:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 679. [2018-04-11 22:22:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2018-04-11 22:22:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 703 transitions. [2018-04-11 22:22:17,673 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 703 transitions. Word has length 508 [2018-04-11 22:22:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:17,674 INFO L459 AbstractCegarLoop]: Abstraction has 679 states and 703 transitions. [2018-04-11 22:22:17,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-04-11 22:22:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 703 transitions. [2018-04-11 22:22:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2018-04-11 22:22:17,678 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:17,678 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] [2018-04-11 22:22:17,678 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]=== [2018-04-11 22:22:17,679 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 [2018-04-11 22:22:17,688 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:17,795 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:17,799 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-04-11 22:22:17,800 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-11 22:22:17,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-11 22:22:17,807 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-11 22:22:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6739 backedges. 2044 proven. 233 refuted. 0 times theorem prover too weak. 4462 trivial. 0 not checked. [2018-04-11 22:22:18,603 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6739 backedges. 2044 proven. 233 refuted. 0 times theorem prover too weak. 4462 trivial. 0 not checked. [2018-04-11 22:22:19,259 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:19,259 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2018-04-11 22:22:19,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-04-11 22:22:19,260 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-04-11 22:22:19,260 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2018-04-11 22:22:19,260 INFO L87 Difference]: Start difference. First operand 679 states and 703 transitions. Second operand 41 states. [2018-04-11 22:22:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:21,616 INFO L93 Difference]: Finished difference Result 705 states and 777 transitions. [2018-04-11 22:22:21,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-04-11 22:22:21,617 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 509 [2018-04-11 22:22:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:21,620 INFO L225 Difference]: With dead ends: 705 [2018-04-11 22:22:21,621 INFO L226 Difference]: Without dead ends: 704 [2018-04-11 22:22:21,622 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 [2018-04-11 22:22:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2018-04-11 22:22:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 680. [2018-04-11 22:22:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2018-04-11 22:22:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 697 transitions. [2018-04-11 22:22:21,648 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 697 transitions. Word has length 509 [2018-04-11 22:22:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:21,648 INFO L459 AbstractCegarLoop]: Abstraction has 680 states and 697 transitions. [2018-04-11 22:22:21,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-04-11 22:22:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 697 transitions. [2018-04-11 22:22:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-04-11 22:22:21,653 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:21,654 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] [2018-04-11 22:22:21,654 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]=== [2018-04-11 22:22:21,654 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 [2018-04-11 22:22:21,663 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:21,817 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9628 backedges. 4954 proven. 348 refuted. 0 times theorem prover too weak. 4326 trivial. 0 not checked. [2018-04-11 22:22:22,401 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9628 backedges. 4954 proven. 348 refuted. 0 times theorem prover too weak. 4326 trivial. 0 not checked. [2018-04-11 22:22:23,298 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:23,298 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 55 [2018-04-11 22:22:23,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-04-11 22:22:23,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-04-11 22:22:23,300 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2573, Unknown=0, NotChecked=0, Total=2970 [2018-04-11 22:22:23,300 INFO L87 Difference]: Start difference. First operand 680 states and 697 transitions. Second operand 55 states. [2018-04-11 22:22:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:24,638 INFO L93 Difference]: Finished difference Result 1016 states and 1051 transitions. [2018-04-11 22:22:24,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-04-11 22:22:24,638 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 580 [2018-04-11 22:22:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:24,642 INFO L225 Difference]: With dead ends: 1016 [2018-04-11 22:22:24,642 INFO L226 Difference]: Without dead ends: 773 [2018-04-11 22:22:24,645 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1209 GetRequests, 1087 SyntacticMatches, 19 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1688, Invalid=9232, Unknown=0, NotChecked=0, Total=10920 [2018-04-11 22:22:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2018-04-11 22:22:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 762. [2018-04-11 22:22:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2018-04-11 22:22:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 779 transitions. [2018-04-11 22:22:24,671 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 779 transitions. Word has length 580 [2018-04-11 22:22:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:24,671 INFO L459 AbstractCegarLoop]: Abstraction has 762 states and 779 transitions. [2018-04-11 22:22:24,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-04-11 22:22:24,671 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 779 transitions. [2018-04-11 22:22:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2018-04-11 22:22:24,677 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:24,677 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] [2018-04-11 22:22:24,678 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]=== [2018-04-11 22:22:24,678 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 [2018-04-11 22:22:24,687 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:24,832 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12939 backedges. 7600 proven. 203 refuted. 0 times theorem prover too weak. 5136 trivial. 0 not checked. [2018-04-11 22:22:25,521 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12939 backedges. 7600 proven. 203 refuted. 0 times theorem prover too weak. 5136 trivial. 0 not checked. [2018-04-11 22:22:26,270 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:26,270 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 52 [2018-04-11 22:22:26,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-04-11 22:22:26,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-04-11 22:22:26,271 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2018-04-11 22:22:26,271 INFO L87 Difference]: Start difference. First operand 762 states and 779 transitions. Second operand 52 states. [2018-04-11 22:22:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:27,059 INFO L93 Difference]: Finished difference Result 1021 states and 1058 transitions. [2018-04-11 22:22:27,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-04-11 22:22:27,059 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 664 [2018-04-11 22:22:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:27,063 INFO L225 Difference]: With dead ends: 1021 [2018-04-11 22:22:27,063 INFO L226 Difference]: Without dead ends: 772 [2018-04-11 22:22:27,066 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1259 SyntacticMatches, 19 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1322, Invalid=6868, Unknown=0, NotChecked=0, Total=8190 [2018-04-11 22:22:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2018-04-11 22:22:27,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 762. [2018-04-11 22:22:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2018-04-11 22:22:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 777 transitions. [2018-04-11 22:22:27,090 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 777 transitions. Word has length 664 [2018-04-11 22:22:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:27,090 INFO L459 AbstractCegarLoop]: Abstraction has 762 states and 777 transitions. [2018-04-11 22:22:27,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-04-11 22:22:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 777 transitions. [2018-04-11 22:22:27,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2018-04-11 22:22:27,096 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:27,097 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] [2018-04-11 22:22:27,097 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]=== [2018-04-11 22:22:27,097 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 [2018-04-11 22:22:27,108 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:27,269 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13410 backedges. 6150 proven. 441 refuted. 0 times theorem prover too weak. 6819 trivial. 0 not checked. [2018-04-11 22:22:28,029 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13410 backedges. 6150 proven. 441 refuted. 0 times theorem prover too weak. 6819 trivial. 0 not checked. [2018-04-11 22:22:28,767 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:28,767 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 61 [2018-04-11 22:22:28,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-04-11 22:22:28,768 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-04-11 22:22:28,768 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2018-04-11 22:22:28,768 INFO L87 Difference]: Start difference. First operand 762 states and 777 transitions. Second operand 61 states. [2018-04-11 22:22:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:30,287 INFO L93 Difference]: Finished difference Result 1096 states and 1127 transitions. [2018-04-11 22:22:30,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-04-11 22:22:30,288 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 673 [2018-04-11 22:22:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:30,290 INFO L225 Difference]: With dead ends: 1096 [2018-04-11 22:22:30,290 INFO L226 Difference]: Without dead ends: 864 [2018-04-11 22:22:30,294 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1401 GetRequests, 1265 SyntacticMatches, 21 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2067, Invalid=11505, Unknown=0, NotChecked=0, Total=13572 [2018-04-11 22:22:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2018-04-11 22:22:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 853. [2018-04-11 22:22:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2018-04-11 22:22:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 868 transitions. [2018-04-11 22:22:30,321 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 868 transitions. Word has length 673 [2018-04-11 22:22:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:30,322 INFO L459 AbstractCegarLoop]: Abstraction has 853 states and 868 transitions. [2018-04-11 22:22:30,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-04-11 22:22:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 868 transitions. [2018-04-11 22:22:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2018-04-11 22:22:30,329 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:30,329 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] [2018-04-11 22:22:30,329 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]=== [2018-04-11 22:22:30,330 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 [2018-04-11 22:22:30,338 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:30,470 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17821 backedges. 9867 proven. 268 refuted. 0 times theorem prover too weak. 7686 trivial. 0 not checked. [2018-04-11 22:22:31,072 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17821 backedges. 9867 proven. 268 refuted. 0 times theorem prover too weak. 7686 trivial. 0 not checked. [2018-04-11 22:22:31,865 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:31,866 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 58 [2018-04-11 22:22:31,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-04-11 22:22:31,867 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-04-11 22:22:31,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=2850, Unknown=0, NotChecked=0, Total=3306 [2018-04-11 22:22:31,867 INFO L87 Difference]: Start difference. First operand 853 states and 868 transitions. Second operand 58 states. [2018-04-11 22:22:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:32,924 INFO L93 Difference]: Finished difference Result 1101 states and 1133 transitions. [2018-04-11 22:22:32,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-04-11 22:22:32,924 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 766 [2018-04-11 22:22:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:32,927 INFO L225 Difference]: With dead ends: 1101 [2018-04-11 22:22:32,927 INFO L226 Difference]: Without dead ends: 863 [2018-04-11 22:22:32,929 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 [2018-04-11 22:22:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-04-11 22:22:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 853. [2018-04-11 22:22:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2018-04-11 22:22:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 866 transitions. [2018-04-11 22:22:32,948 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 866 transitions. Word has length 766 [2018-04-11 22:22:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:32,949 INFO L459 AbstractCegarLoop]: Abstraction has 853 states and 866 transitions. [2018-04-11 22:22:32,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-04-11 22:22:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 866 transitions. [2018-04-11 22:22:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2018-04-11 22:22:32,953 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:32,954 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] [2018-04-11 22:22:32,954 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]=== [2018-04-11 22:22:32,954 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 [2018-04-11 22:22:32,970 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:33,102 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18375 backedges. 7475 proven. 545 refuted. 0 times theorem prover too weak. 10355 trivial. 0 not checked. [2018-04-11 22:22:33,837 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18375 backedges. 7475 proven. 545 refuted. 0 times theorem prover too weak. 10355 trivial. 0 not checked. [2018-04-11 22:22:34,681 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:34,681 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 67 [2018-04-11 22:22:34,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-11 22:22:34,682 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-11 22:22:34,682 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2018-04-11 22:22:34,683 INFO L87 Difference]: Start difference. First operand 853 states and 866 transitions. Second operand 67 states. [2018-04-11 22:22:36,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:36,367 INFO L93 Difference]: Finished difference Result 1185 states and 1212 transitions. [2018-04-11 22:22:36,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-04-11 22:22:36,405 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 775 [2018-04-11 22:22:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:36,408 INFO L225 Difference]: With dead ends: 1185 [2018-04-11 22:22:36,408 INFO L226 Difference]: Without dead ends: 964 [2018-04-11 22:22:36,409 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 [2018-04-11 22:22:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2018-04-11 22:22:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 953. [2018-04-11 22:22:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-04-11 22:22:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 966 transitions. [2018-04-11 22:22:36,427 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 966 transitions. Word has length 775 [2018-04-11 22:22:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:36,427 INFO L459 AbstractCegarLoop]: Abstraction has 953 states and 966 transitions. [2018-04-11 22:22:36,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-11 22:22:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 966 transitions. [2018-04-11 22:22:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2018-04-11 22:22:36,434 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:36,435 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] [2018-04-11 22:22:36,435 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]=== [2018-04-11 22:22:36,435 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 [2018-04-11 22:22:36,441 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:36,595 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24126 backedges. 12514 proven. 342 refuted. 0 times theorem prover too weak. 11270 trivial. 0 not checked. [2018-04-11 22:22:37,349 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24126 backedges. 12514 proven. 342 refuted. 0 times theorem prover too weak. 11270 trivial. 0 not checked. [2018-04-11 22:22:38,301 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:38,301 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 64 [2018-04-11 22:22:38,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-11 22:22:38,302 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-11 22:22:38,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=3486, Unknown=0, NotChecked=0, Total=4032 [2018-04-11 22:22:38,302 INFO L87 Difference]: Start difference. First operand 953 states and 966 transitions. Second operand 64 states. [2018-04-11 22:22:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:39,386 INFO L93 Difference]: Finished difference Result 1190 states and 1217 transitions. [2018-04-11 22:22:39,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-04-11 22:22:39,386 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 877 [2018-04-11 22:22:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:39,389 INFO L225 Difference]: With dead ends: 1190 [2018-04-11 22:22:39,389 INFO L226 Difference]: Without dead ends: 963 [2018-04-11 22:22:39,391 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 [2018-04-11 22:22:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2018-04-11 22:22:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 953. [2018-04-11 22:22:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-04-11 22:22:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 964 transitions. [2018-04-11 22:22:39,409 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 964 transitions. Word has length 877 [2018-04-11 22:22:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:39,410 INFO L459 AbstractCegarLoop]: Abstraction has 953 states and 964 transitions. [2018-04-11 22:22:39,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-11 22:22:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 964 transitions. [2018-04-11 22:22:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2018-04-11 22:22:39,415 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:39,415 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] [2018-04-11 22:22:39,415 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]=== [2018-04-11 22:22:39,416 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 [2018-04-11 22:22:39,422 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:39,580 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24772 backedges. 8929 proven. 660 refuted. 0 times theorem prover too weak. 15183 trivial. 0 not checked. [2018-04-11 22:22:40,452 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24772 backedges. 8929 proven. 660 refuted. 0 times theorem prover too weak. 15183 trivial. 0 not checked. [2018-04-11 22:22:41,447 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:41,461 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 73 [2018-04-11 22:22:41,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-11 22:22:41,462 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-11 22:22:41,462 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=4583, Unknown=0, NotChecked=0, Total=5256 [2018-04-11 22:22:41,463 INFO L87 Difference]: Start difference. First operand 953 states and 964 transitions. Second operand 73 states. [2018-04-11 22:22:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:43,387 INFO L93 Difference]: Finished difference Result 1283 states and 1306 transitions. [2018-04-11 22:22:43,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-04-11 22:22:43,387 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 886 [2018-04-11 22:22:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:43,390 INFO L225 Difference]: With dead ends: 1283 [2018-04-11 22:22:43,390 INFO L226 Difference]: Without dead ends: 1073 [2018-04-11 22:22:43,392 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 [2018-04-11 22:22:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2018-04-11 22:22:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1062. [2018-04-11 22:22:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2018-04-11 22:22:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1073 transitions. [2018-04-11 22:22:43,412 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1073 transitions. Word has length 886 [2018-04-11 22:22:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:43,413 INFO L459 AbstractCegarLoop]: Abstraction has 1062 states and 1073 transitions. [2018-04-11 22:22:43,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-11 22:22:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1073 transitions. [2018-04-11 22:22:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2018-04-11 22:22:43,419 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:43,419 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] [2018-04-11 22:22:43,419 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]=== [2018-04-11 22:22:43,419 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 [2018-04-11 22:22:43,437 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:43,607 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32130 backedges. 15568 proven. 425 refuted. 0 times theorem prover too weak. 16137 trivial. 0 not checked. [2018-04-11 22:22:44,550 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 32130 backedges. 15568 proven. 425 refuted. 0 times theorem prover too weak. 16137 trivial. 0 not checked. [2018-04-11 22:22:45,715 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:45,715 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 70 [2018-04-11 22:22:45,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-04-11 22:22:45,717 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-04-11 22:22:45,717 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=4186, Unknown=0, NotChecked=0, Total=4830 [2018-04-11 22:22:45,717 INFO L87 Difference]: Start difference. First operand 1062 states and 1073 transitions. Second operand 70 states. [2018-04-11 22:22:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:46,817 INFO L93 Difference]: Finished difference Result 1288 states and 1310 transitions. [2018-04-11 22:22:46,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-04-11 22:22:46,850 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 997 [2018-04-11 22:22:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:46,853 INFO L225 Difference]: With dead ends: 1288 [2018-04-11 22:22:46,853 INFO L226 Difference]: Without dead ends: 1072 [2018-04-11 22:22:46,855 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2048 GetRequests, 1901 SyntacticMatches, 25 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5824 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2378, Invalid=12874, Unknown=0, NotChecked=0, Total=15252 [2018-04-11 22:22:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2018-04-11 22:22:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1062. [2018-04-11 22:22:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2018-04-11 22:22:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1071 transitions. [2018-04-11 22:22:46,875 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1071 transitions. Word has length 997 [2018-04-11 22:22:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:46,876 INFO L459 AbstractCegarLoop]: Abstraction has 1062 states and 1071 transitions. [2018-04-11 22:22:46,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-04-11 22:22:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1071 transitions. [2018-04-11 22:22:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2018-04-11 22:22:46,886 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:46,886 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] [2018-04-11 22:22:46,887 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]=== [2018-04-11 22:22:46,887 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 [2018-04-11 22:22:46,893 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:47,060 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32877 backedges. 10512 proven. 786 refuted. 0 times theorem prover too weak. 21579 trivial. 0 not checked. [2018-04-11 22:22:48,102 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 32877 backedges. 10512 proven. 786 refuted. 0 times theorem prover too weak. 21579 trivial. 0 not checked. [2018-04-11 22:22:49,263 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:49,264 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 79 [2018-04-11 22:22:49,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-04-11 22:22:49,265 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-04-11 22:22:49,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=5381, Unknown=0, NotChecked=0, Total=6162 [2018-04-11 22:22:49,265 INFO L87 Difference]: Start difference. First operand 1062 states and 1071 transitions. Second operand 79 states. [2018-04-11 22:22:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:51,385 INFO L93 Difference]: Finished difference Result 1390 states and 1409 transitions. [2018-04-11 22:22:51,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-04-11 22:22:51,386 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 1006 [2018-04-11 22:22:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:51,388 INFO L225 Difference]: With dead ends: 1390 [2018-04-11 22:22:51,389 INFO L226 Difference]: Without dead ends: 1191 [2018-04-11 22:22:51,390 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2085 GetRequests, 1907 SyntacticMatches, 27 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6243 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3432, Invalid=19824, Unknown=0, NotChecked=0, Total=23256 [2018-04-11 22:22:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2018-04-11 22:22:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1180. [2018-04-11 22:22:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-04-11 22:22:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1189 transitions. [2018-04-11 22:22:51,411 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1189 transitions. Word has length 1006 [2018-04-11 22:22:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:51,412 INFO L459 AbstractCegarLoop]: Abstraction has 1180 states and 1189 transitions. [2018-04-11 22:22:51,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-04-11 22:22:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1189 transitions. [2018-04-11 22:22:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2018-04-11 22:22:51,419 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:51,420 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] [2018-04-11 22:22:51,420 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]=== [2018-04-11 22:22:51,420 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 [2018-04-11 22:22:51,440 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:51,628 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 42136 backedges. 19056 proven. 517 refuted. 0 times theorem prover too weak. 22563 trivial. 0 not checked. [2018-04-11 22:22:52,720 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 42136 backedges. 19056 proven. 517 refuted. 0 times theorem prover too weak. 22563 trivial. 0 not checked. [2018-04-11 22:22:54,217 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:54,218 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 76 [2018-04-11 22:22:54,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-04-11 22:22:54,219 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-04-11 22:22:54,219 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=4950, Unknown=0, NotChecked=0, Total=5700 [2018-04-11 22:22:54,219 INFO L87 Difference]: Start difference. First operand 1180 states and 1189 transitions. Second operand 76 states. [2018-04-11 22:22:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:22:55,585 INFO L93 Difference]: Finished difference Result 1395 states and 1412 transitions. [2018-04-11 22:22:55,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-04-11 22:22:55,585 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 1126 [2018-04-11 22:22:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:22:55,588 INFO L225 Difference]: With dead ends: 1395 [2018-04-11 22:22:55,588 INFO L226 Difference]: Without dead ends: 1190 [2018-04-11 22:22:55,590 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2311 GetRequests, 2151 SyntacticMatches, 27 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6971 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2798, Invalid=15292, Unknown=0, NotChecked=0, Total=18090 [2018-04-11 22:22:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2018-04-11 22:22:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1180. [2018-04-11 22:22:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-04-11 22:22:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1187 transitions. [2018-04-11 22:22:55,612 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1187 transitions. Word has length 1126 [2018-04-11 22:22:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:22:55,613 INFO L459 AbstractCegarLoop]: Abstraction has 1180 states and 1187 transitions. [2018-04-11 22:22:55,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-04-11 22:22:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1187 transitions. [2018-04-11 22:22:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2018-04-11 22:22:55,621 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:22:55,621 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] [2018-04-11 22:22:55,621 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]=== [2018-04-11 22:22:55,621 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 [2018-04-11 22:22:55,627 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:22:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:22:55,822 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:22:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42993 backedges. 12224 proven. 923 refuted. 0 times theorem prover too weak. 29846 trivial. 0 not checked. [2018-04-11 22:22:57,121 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:22:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 42993 backedges. 12224 proven. 923 refuted. 0 times theorem prover too weak. 29846 trivial. 0 not checked. [2018-04-11 22:22:58,549 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:22:58,550 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 85 [2018-04-11 22:22:58,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-04-11 22:22:58,551 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-04-11 22:22:58,552 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=6243, Unknown=0, NotChecked=0, Total=7140 [2018-04-11 22:22:58,552 INFO L87 Difference]: Start difference. First operand 1180 states and 1187 transitions. Second operand 85 states. [2018-04-11 22:23:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:23:01,099 INFO L93 Difference]: Finished difference Result 1506 states and 1521 transitions. [2018-04-11 22:23:01,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-04-11 22:23:01,100 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 1135 [2018-04-11 22:23:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:23:01,103 INFO L225 Difference]: With dead ends: 1506 [2018-04-11 22:23:01,103 INFO L226 Difference]: Without dead ends: 1318 [2018-04-11 22:23:01,105 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2349 GetRequests, 2157 SyntacticMatches, 29 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7316 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3963, Invalid=23097, Unknown=0, NotChecked=0, Total=27060 [2018-04-11 22:23:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2018-04-11 22:23:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1307. [2018-04-11 22:23:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2018-04-11 22:23:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1314 transitions. [2018-04-11 22:23:01,128 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1314 transitions. Word has length 1135 [2018-04-11 22:23:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:23:01,128 INFO L459 AbstractCegarLoop]: Abstraction has 1307 states and 1314 transitions. [2018-04-11 22:23:01,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-04-11 22:23:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1314 transitions. [2018-04-11 22:23:01,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1257 [2018-04-11 22:23:01,137 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:23:01,137 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] [2018-04-11 22:23:01,137 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]=== [2018-04-11 22:23:01,137 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 [2018-04-11 22:23:01,143 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:23:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:23:01,342 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:23:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 51654 backedges. 20549 proven. 618 refuted. 0 times theorem prover too weak. 30487 trivial. 0 not checked. [2018-04-11 22:23:02,651 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:23:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 51654 backedges. 10173 proven. 1970 refuted. 0 times theorem prover too weak. 39511 trivial. 0 not checked. [2018-04-11 22:23:04,217 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:23:04,239 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 82 [2018-04-11 22:23:04,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-04-11 22:23:04,241 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-04-11 22:23:04,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=5778, Unknown=0, NotChecked=0, Total=6642 [2018-04-11 22:23:04,241 INFO L87 Difference]: Start difference. First operand 1307 states and 1314 transitions. Second operand 82 states. [2018-04-11 22:23:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:23:05,649 INFO L93 Difference]: Finished difference Result 1511 states and 1523 transitions. [2018-04-11 22:23:05,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-04-11 22:23:05,650 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 1256 [2018-04-11 22:23:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:23:05,653 INFO L225 Difference]: With dead ends: 1511 [2018-04-11 22:23:05,653 INFO L226 Difference]: Without dead ends: 1317 [2018-04-11 22:23:05,655 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 [2018-04-11 22:23:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2018-04-11 22:23:05,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1307. [2018-04-11 22:23:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2018-04-11 22:23:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1312 transitions. [2018-04-11 22:23:05,677 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1312 transitions. Word has length 1256 [2018-04-11 22:23:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:23:05,678 INFO L459 AbstractCegarLoop]: Abstraction has 1307 states and 1312 transitions. [2018-04-11 22:23:05,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-04-11 22:23:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1312 transitions. [2018-04-11 22:23:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1274 [2018-04-11 22:23:05,686 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:23:05,687 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] [2018-04-11 22:23:05,687 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]=== [2018-04-11 22:23:05,687 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 [2018-04-11 22:23:05,693 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:23:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:23:05,906 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:23:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 55450 backedges. 14065 proven. 1071 refuted. 0 times theorem prover too weak. 40314 trivial. 0 not checked. [2018-04-11 22:23:07,343 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:23:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55450 backedges. 14065 proven. 1071 refuted. 0 times theorem prover too weak. 40314 trivial. 0 not checked. [2018-04-11 22:23:08,986 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:23:08,987 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 91 [2018-04-11 22:23:08,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-04-11 22:23:08,988 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-04-11 22:23:08,988 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=7169, Unknown=0, NotChecked=0, Total=8190 [2018-04-11 22:23:08,989 INFO L87 Difference]: Start difference. First operand 1307 states and 1312 transitions. Second operand 91 states. [2018-04-11 22:23:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:23:12,233 INFO L93 Difference]: Finished difference Result 1642 states and 1655 transitions. [2018-04-11 22:23:12,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-04-11 22:23:12,233 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 1273 [2018-04-11 22:23:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:23:12,237 INFO L225 Difference]: With dead ends: 1642 [2018-04-11 22:23:12,237 INFO L226 Difference]: Without dead ends: 1462 [2018-04-11 22:23:12,238 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2631 GetRequests, 2425 SyntacticMatches, 31 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8474 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4532, Invalid=26620, Unknown=0, NotChecked=0, Total=31152 [2018-04-11 22:23:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2018-04-11 22:23:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1446. [2018-04-11 22:23:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1446 states. [2018-04-11 22:23:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 1452 transitions. [2018-04-11 22:23:12,264 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 1452 transitions. Word has length 1273 [2018-04-11 22:23:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:23:12,264 INFO L459 AbstractCegarLoop]: Abstraction has 1446 states and 1452 transitions. [2018-04-11 22:23:12,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-04-11 22:23:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 1452 transitions. [2018-04-11 22:23:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2018-04-11 22:23:12,273 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:23:12,273 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] [2018-04-11 22:23:12,273 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]=== [2018-04-11 22:23:12,274 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 [2018-04-11 22:23:12,279 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:23:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:23:12,483 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:23:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 53559 backedges. 12490 proven. 728 refuted. 0 times theorem prover too weak. 40341 trivial. 0 not checked. [2018-04-11 22:23:13,891 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:23:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 53559 backedges. 12490 proven. 728 refuted. 0 times theorem prover too weak. 40341 trivial. 0 not checked. [2018-04-11 22:23:15,734 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:23:15,735 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 88 [2018-04-11 22:23:15,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-04-11 22:23:15,737 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-04-11 22:23:15,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=986, Invalid=6670, Unknown=0, NotChecked=0, Total=7656 [2018-04-11 22:23:15,737 INFO L87 Difference]: Start difference. First operand 1446 states and 1452 transitions. Second operand 88 states. [2018-04-11 22:23:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:23:17,238 INFO L93 Difference]: Finished difference Result 1642 states and 1652 transitions. [2018-04-11 22:23:17,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-04-11 22:23:17,238 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 1274 [2018-04-11 22:23:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:23:17,242 INFO L225 Difference]: With dead ends: 1642 [2018-04-11 22:23:17,242 INFO L226 Difference]: Without dead ends: 1456 [2018-04-11 22:23:17,245 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 [2018-04-11 22:23:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2018-04-11 22:23:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1446. [2018-04-11 22:23:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1446 states. [2018-04-11 22:23:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 1450 transitions. [2018-04-11 22:23:17,272 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 1450 transitions. Word has length 1274 [2018-04-11 22:23:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:23:17,272 INFO L459 AbstractCegarLoop]: Abstraction has 1446 states and 1450 transitions. [2018-04-11 22:23:17,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-04-11 22:23:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 1450 transitions. [2018-04-11 22:23:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1284 [2018-04-11 22:23:17,281 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:23:17,282 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] [2018-04-11 22:23:17,282 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]=== [2018-04-11 22:23:17,282 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 [2018-04-11 22:23:17,288 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:23:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:23:17,493 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:23:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 54525 backedges. 0 proven. 1185 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-04-11 22:23:18,247 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:23:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54525 backedges. 0 proven. 1185 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-04-11 22:23:19,375 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:23:19,376 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-04-11 22:23:19,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-11 22:23:19,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-11 22:23:19,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2018-04-11 22:23:19,378 INFO L87 Difference]: Start difference. First operand 1446 states and 1450 transitions. Second operand 64 states. [2018-04-11 22:23:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:23:20,689 INFO L93 Difference]: Finished difference Result 1649 states and 1684 transitions. [2018-04-11 22:23:20,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-04-11 22:23:20,689 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 1283 [2018-04-11 22:23:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:23:20,694 INFO L225 Difference]: With dead ends: 1649 [2018-04-11 22:23:20,694 INFO L226 Difference]: Without dead ends: 1629 [2018-04-11 22:23:20,695 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 [2018-04-11 22:23:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2018-04-11 22:23:20,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1619. [2018-04-11 22:23:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2018-04-11 22:23:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1638 transitions. [2018-04-11 22:23:20,728 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1638 transitions. Word has length 1283 [2018-04-11 22:23:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:23:20,728 INFO L459 AbstractCegarLoop]: Abstraction has 1619 states and 1638 transitions. [2018-04-11 22:23:20,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-11 22:23:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1638 transitions. [2018-04-11 22:23:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1421 [2018-04-11 22:23:20,739 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:23:20,740 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] [2018-04-11 22:23:20,740 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]=== [2018-04-11 22:23:20,740 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 [2018-04-11 22:23:20,746 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:23:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:23:20,979 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:23:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 70605 backedges. 16035 proven. 1230 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-04-11 22:23:22,682 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:23:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 70605 backedges. 16035 proven. 1230 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-04-11 22:23:24,610 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:23:24,611 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 97 [2018-04-11 22:23:24,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-04-11 22:23:24,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-04-11 22:23:24,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=8159, Unknown=0, NotChecked=0, Total=9312 [2018-04-11 22:23:24,613 INFO L87 Difference]: Start difference. First operand 1619 states and 1638 transitions. Second operand 97 states. [2018-04-11 22:23:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:23:27,841 INFO L93 Difference]: Finished difference Result 2117 states and 2156 transitions. [2018-04-11 22:23:27,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-04-11 22:23:27,841 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 1420 [2018-04-11 22:23:27,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:23:27,845 INFO L225 Difference]: With dead ends: 2117 [2018-04-11 22:23:27,845 INFO L226 Difference]: Without dead ends: 1775 [2018-04-11 22:23:27,848 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 [2018-04-11 22:23:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2018-04-11 22:23:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1764. [2018-04-11 22:23:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2018-04-11 22:23:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1783 transitions. [2018-04-11 22:23:27,883 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1783 transitions. Word has length 1420 [2018-04-11 22:23:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:23:27,884 INFO L459 AbstractCegarLoop]: Abstraction has 1764 states and 1783 transitions. [2018-04-11 22:23:27,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-04-11 22:23:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1783 transitions. [2018-04-11 22:23:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1568 [2018-04-11 22:23:27,897 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:23:27,897 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] [2018-04-11 22:23:27,897 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]=== [2018-04-11 22:23:27,898 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 [2018-04-11 22:23:27,904 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:23:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:23:28,169 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:23:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 87601 backedges. 32394 proven. 847 refuted. 0 times theorem prover too weak. 54360 trivial. 0 not checked. [2018-04-11 22:23:29,983 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:23:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 87601 backedges. 32394 proven. 847 refuted. 0 times theorem prover too weak. 54360 trivial. 0 not checked. [2018-04-11 22:23:32,134 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:23:32,134 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 94 [2018-04-11 22:23:32,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-04-11 22:23:32,135 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-04-11 22:23:32,136 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=7626, Unknown=0, NotChecked=0, Total=8742 [2018-04-11 22:23:32,136 INFO L87 Difference]: Start difference. First operand 1764 states and 1783 transitions. Second operand 94 states. [2018-04-11 22:23:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:23:33,947 INFO L93 Difference]: Finished difference Result 2126 states and 2176 transitions. [2018-04-11 22:23:33,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-04-11 22:23:33,947 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 1567 [2018-04-11 22:23:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:23:33,952 INFO L225 Difference]: With dead ends: 2126 [2018-04-11 22:23:33,952 INFO L226 Difference]: Without dead ends: 1778 [2018-04-11 22:23:33,955 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 [2018-04-11 22:23:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2018-04-11 22:23:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1764. [2018-04-11 22:23:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2018-04-11 22:23:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1781 transitions. [2018-04-11 22:23:33,990 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1781 transitions. Word has length 1567 [2018-04-11 22:23:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:23:33,990 INFO L459 AbstractCegarLoop]: Abstraction has 1764 states and 1781 transitions. [2018-04-11 22:23:33,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-04-11 22:23:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1781 transitions. [2018-04-11 22:23:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1577 [2018-04-11 22:23:34,003 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:23:34,003 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] [2018-04-11 22:23:34,004 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]=== [2018-04-11 22:23:34,004 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 [2018-04-11 22:23:34,009 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:23:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:23:34,268 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:23:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 88842 backedges. 17072 proven. 990 refuted. 0 times theorem prover too weak. 70780 trivial. 0 not checked. [2018-04-11 22:23:35,303 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:23:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 88842 backedges. 17072 proven. 990 refuted. 0 times theorem prover too weak. 70780 trivial. 0 not checked. [2018-04-11 22:23:37,130 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:23:37,131 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-04-11 22:23:37,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-11 22:23:37,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-11 22:23:37,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2018-04-11 22:23:37,132 INFO L87 Difference]: Start difference. First operand 1764 states and 1781 transitions. Second operand 64 states. [2018-04-11 22:23:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:23:42,738 INFO L93 Difference]: Finished difference Result 1977 states and 2249 transitions. [2018-04-11 22:23:42,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-04-11 22:23:42,738 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 1576 [2018-04-11 22:23:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:23:42,745 INFO L225 Difference]: With dead ends: 1977 [2018-04-11 22:23:42,745 INFO L226 Difference]: Without dead ends: 1976 [2018-04-11 22:23:42,747 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 [2018-04-11 22:23:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2018-04-11 22:23:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1907. [2018-04-11 22:23:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1907 states. [2018-04-11 22:23:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 1955 transitions. [2018-04-11 22:23:42,800 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 1955 transitions. Word has length 1576 [2018-04-11 22:23:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:23:42,801 INFO L459 AbstractCegarLoop]: Abstraction has 1907 states and 1955 transitions. [2018-04-11 22:23:42,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-11 22:23:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 1955 transitions. [2018-04-11 22:23:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2018-04-11 22:23:42,813 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:23:42,813 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] [2018-04-11 22:23:42,813 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]=== [2018-04-11 22:23:42,814 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 [2018-04-11 22:23:42,819 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:23:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:23:43,076 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:23:43,078 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-04-11 22:23:43,078 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-11 22:23:43,087 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-11 22:23:43,087 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-11 22:23:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 88977 backedges. 17272 proven. 1037 refuted. 0 times theorem prover too weak. 70668 trivial. 0 not checked. [2018-04-11 22:23:47,417 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:23:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 88977 backedges. 17272 proven. 1037 refuted. 0 times theorem prover too weak. 70668 trivial. 0 not checked. [2018-04-11 22:23:50,146 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:23:50,147 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 72 [2018-04-11 22:23:50,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-11 22:23:50,148 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-11 22:23:50,148 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=4531, Unknown=0, NotChecked=0, Total=5256 [2018-04-11 22:23:50,148 INFO L87 Difference]: Start difference. First operand 1907 states and 1955 transitions. Second operand 73 states. [2018-04-11 22:23:53,583 WARN L151 SmtUtils]: Spent 105ms on a formula simplification. DAG size of input: 124 DAG size of output 27 [2018-04-11 22:23:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:23:59,550 INFO L93 Difference]: Finished difference Result 1957 states and 2229 transitions. [2018-04-11 22:23:59,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-04-11 22:23:59,551 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 1577 [2018-04-11 22:23:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:23:59,556 INFO L225 Difference]: With dead ends: 1957 [2018-04-11 22:23:59,556 INFO L226 Difference]: Without dead ends: 1956 [2018-04-11 22:23:59,558 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3247 GetRequests, 3052 SyntacticMatches, 31 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6177 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=5731, Invalid=21659, Unknown=0, NotChecked=0, Total=27390 [2018-04-11 22:23:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2018-04-11 22:23:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1908. [2018-04-11 22:23:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1908 states. [2018-04-11 22:23:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 1941 transitions. [2018-04-11 22:23:59,623 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 1941 transitions. Word has length 1577 [2018-04-11 22:23:59,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:23:59,624 INFO L459 AbstractCegarLoop]: Abstraction has 1908 states and 1941 transitions. [2018-04-11 22:23:59,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-11 22:23:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 1941 transitions. [2018-04-11 22:23:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1721 [2018-04-11 22:23:59,643 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:23:59,643 INFO L355 BasicCegarLoop]: trace histogram [168, 152, 151, 151, 151, 151, 151, 151, 151, 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] [2018-04-11 22:23:59,643 INFO L408 AbstractCegarLoop]: === Iteration 49 === [__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]=== [2018-04-11 22:23:59,644 INFO L82 PathProgramCache]: Analyzing trace with hash -526871899, now seen corresponding path program 30 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:23:59,649 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:23:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:23:59,921 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:24:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 109922 backedges. 38262 proven. 1400 refuted. 0 times theorem prover too weak. 70260 trivial. 0 not checked. [2018-04-11 22:24:01,968 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:24:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 109922 backedges. 38262 proven. 1400 refuted. 0 times theorem prover too weak. 70260 trivial. 0 not checked. [2018-04-11 22:24:04,209 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:24:04,210 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 103 [2018-04-11 22:24:04,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-04-11 22:24:04,211 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-04-11 22:24:04,212 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=9213, Unknown=0, NotChecked=0, Total=10506 [2018-04-11 22:24:04,212 INFO L87 Difference]: Start difference. First operand 1908 states and 1941 transitions. Second operand 103 states. [2018-04-11 22:24:07,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:24:07,778 INFO L93 Difference]: Finished difference Result 2548 states and 2615 transitions. [2018-04-11 22:24:07,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-04-11 22:24:07,779 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 1720 [2018-04-11 22:24:07,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:24:07,783 INFO L225 Difference]: With dead ends: 2548 [2018-04-11 22:24:07,783 INFO L226 Difference]: Without dead ends: 2073 [2018-04-11 22:24:07,789 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3537 GetRequests, 3303 SyntacticMatches, 35 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11045 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5784, Invalid=34416, Unknown=0, NotChecked=0, Total=40200 [2018-04-11 22:24:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2018-04-11 22:24:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2062. [2018-04-11 22:24:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2018-04-11 22:24:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2095 transitions. [2018-04-11 22:24:07,828 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2095 transitions. Word has length 1720 [2018-04-11 22:24:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:24:07,829 INFO L459 AbstractCegarLoop]: Abstraction has 2062 states and 2095 transitions. [2018-04-11 22:24:07,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-04-11 22:24:07,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2095 transitions. [2018-04-11 22:24:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1877 [2018-04-11 22:24:07,846 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:24:07,846 INFO L355 BasicCegarLoop]: trace histogram [184, 167, 166, 166, 166, 166, 166, 166, 166, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:24:07,846 INFO L408 AbstractCegarLoop]: === Iteration 50 === [__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]=== [2018-04-11 22:24:07,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1915923649, now seen corresponding path program 31 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:24:07,853 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:24:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:24:08,183 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:24:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 132457 backedges. 57872 proven. 975 refuted. 0 times theorem prover too weak. 73610 trivial. 0 not checked. [2018-04-11 22:24:10,359 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:24:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 132457 backedges. 57872 proven. 975 refuted. 0 times theorem prover too weak. 73610 trivial. 0 not checked. [2018-04-11 22:24:12,889 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:24:12,890 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 100 [2018-04-11 22:24:12,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-04-11 22:24:12,891 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-04-11 22:24:12,891 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1254, Invalid=8646, Unknown=0, NotChecked=0, Total=9900 [2018-04-11 22:24:12,892 INFO L87 Difference]: Start difference. First operand 2062 states and 2095 transitions. Second operand 100 states. [2018-04-11 22:24:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:24:14,838 INFO L93 Difference]: Finished difference Result 2553 states and 2630 transitions. [2018-04-11 22:24:14,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-04-11 22:24:14,838 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 1876 [2018-04-11 22:24:14,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:24:14,843 INFO L225 Difference]: With dead ends: 2553 [2018-04-11 22:24:14,843 INFO L226 Difference]: Without dead ends: 2072 [2018-04-11 22:24:14,848 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3831 GetRequests, 3619 SyntacticMatches, 35 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12589 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4818, Invalid=27044, Unknown=0, NotChecked=0, Total=31862 [2018-04-11 22:24:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2018-04-11 22:24:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2062. [2018-04-11 22:24:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2018-04-11 22:24:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2093 transitions. [2018-04-11 22:24:14,888 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2093 transitions. Word has length 1876 [2018-04-11 22:24:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:24:14,889 INFO L459 AbstractCegarLoop]: Abstraction has 2062 states and 2093 transitions. [2018-04-11 22:24:14,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-04-11 22:24:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2093 transitions. [2018-04-11 22:24:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1886 [2018-04-11 22:24:14,906 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:24:14,906 INFO L355 BasicCegarLoop]: trace histogram [185, 168, 167, 167, 167, 167, 167, 167, 167, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:24:14,906 INFO L408 AbstractCegarLoop]: === Iteration 51 === [__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]=== [2018-04-11 22:24:14,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1054389958, now seen corresponding path program 32 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:24:14,912 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:24:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:24:15,237 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:24:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 133988 backedges. 42970 proven. 1581 refuted. 0 times theorem prover too weak. 89437 trivial. 0 not checked. [2018-04-11 22:24:17,596 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:24:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 133988 backedges. 42970 proven. 1581 refuted. 0 times theorem prover too weak. 89437 trivial. 0 not checked. [2018-04-11 22:24:20,188 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:24:20,188 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 109 [2018-04-11 22:24:20,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-04-11 22:24:20,190 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-04-11 22:24:20,190 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1441, Invalid=10331, Unknown=0, NotChecked=0, Total=11772 [2018-04-11 22:24:20,190 INFO L87 Difference]: Start difference. First operand 2062 states and 2093 transitions. Second operand 109 states. [2018-04-11 22:24:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:24:24,347 INFO L93 Difference]: Finished difference Result 2700 states and 2763 transitions. [2018-04-11 22:24:24,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-04-11 22:24:24,347 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 1885 [2018-04-11 22:24:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:24:24,351 INFO L225 Difference]: With dead ends: 2700 [2018-04-11 22:24:24,352 INFO L226 Difference]: Without dead ends: 2236 [2018-04-11 22:24:24,356 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3873 GetRequests, 3625 SyntacticMatches, 37 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12458 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6467, Invalid=38689, Unknown=0, NotChecked=0, Total=45156 [2018-04-11 22:24:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2018-04-11 22:24:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2225. [2018-04-11 22:24:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2225 states. [2018-04-11 22:24:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2256 transitions. [2018-04-11 22:24:24,396 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2256 transitions. Word has length 1885 [2018-04-11 22:24:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:24:24,397 INFO L459 AbstractCegarLoop]: Abstraction has 2225 states and 2256 transitions. [2018-04-11 22:24:24,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-04-11 22:24:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2256 transitions. [2018-04-11 22:24:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2051 [2018-04-11 22:24:24,418 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:24:24,419 INFO L355 BasicCegarLoop]: trace histogram [202, 184, 183, 183, 183, 183, 183, 183, 183, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:24:24,419 INFO L408 AbstractCegarLoop]: === Iteration 52 === [__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]=== [2018-04-11 22:24:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash 357813189, now seen corresponding path program 33 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:24:24,425 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:24:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:24:24,752 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:24:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 160443 backedges. 66415 proven. 1112 refuted. 0 times theorem prover too weak. 92916 trivial. 0 not checked. [2018-04-11 22:24:27,281 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:24:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 160443 backedges. 66415 proven. 1112 refuted. 0 times theorem prover too weak. 92916 trivial. 0 not checked. [2018-04-11 22:24:30,186 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:24:30,186 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 106 [2018-04-11 22:24:30,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-04-11 22:24:30,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-04-11 22:24:30,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1400, Invalid=9730, Unknown=0, NotChecked=0, Total=11130 [2018-04-11 22:24:30,189 INFO L87 Difference]: Start difference. First operand 2225 states and 2256 transitions. Second operand 106 states. [2018-04-11 22:24:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:24:32,226 INFO L93 Difference]: Finished difference Result 2705 states and 2777 transitions. [2018-04-11 22:24:32,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-04-11 22:24:32,227 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 2050 [2018-04-11 22:24:32,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:24:32,230 INFO L225 Difference]: With dead ends: 2705 [2018-04-11 22:24:32,230 INFO L226 Difference]: Without dead ends: 2235 [2018-04-11 22:24:32,234 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4184 GetRequests, 3959 SyntacticMatches, 37 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14251 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5408, Invalid=30502, Unknown=0, NotChecked=0, Total=35910 [2018-04-11 22:24:32,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2018-04-11 22:24:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2225. [2018-04-11 22:24:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2225 states. [2018-04-11 22:24:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2254 transitions. [2018-04-11 22:24:32,276 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2254 transitions. Word has length 2050 [2018-04-11 22:24:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:24:32,277 INFO L459 AbstractCegarLoop]: Abstraction has 2225 states and 2254 transitions. [2018-04-11 22:24:32,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-04-11 22:24:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2254 transitions. [2018-04-11 22:24:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2060 [2018-04-11 22:24:32,298 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:24:32,299 INFO L355 BasicCegarLoop]: trace histogram [203, 185, 184, 184, 184, 184, 184, 184, 184, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:24:32,299 INFO L408 AbstractCegarLoop]: === Iteration 53 === [__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]=== [2018-04-11 22:24:32,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1680275596, now seen corresponding path program 34 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:24:32,305 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:24:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:24:32,645 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:24:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 162129 backedges. 47951 proven. 1773 refuted. 0 times theorem prover too weak. 112405 trivial. 0 not checked. [2018-04-11 22:24:35,324 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:24:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 162129 backedges. 47951 proven. 1773 refuted. 0 times theorem prover too weak. 112405 trivial. 0 not checked. [2018-04-11 22:24:38,300 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:24:38,301 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 115 [2018-04-11 22:24:38,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-04-11 22:24:38,304 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-04-11 22:24:38,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1597, Invalid=11513, Unknown=0, NotChecked=0, Total=13110 [2018-04-11 22:24:38,305 INFO L87 Difference]: Start difference. First operand 2225 states and 2254 transitions. Second operand 115 states. [2018-04-11 22:24:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:24:42,821 INFO L93 Difference]: Finished difference Result 2861 states and 2920 transitions. [2018-04-11 22:24:42,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-04-11 22:24:42,822 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 2059 [2018-04-11 22:24:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:24:42,827 INFO L225 Difference]: With dead ends: 2861 [2018-04-11 22:24:42,827 INFO L226 Difference]: Without dead ends: 2408 [2018-04-11 22:24:42,832 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4227 GetRequests, 3965 SyntacticMatches, 39 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13956 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=7188, Invalid=43212, Unknown=0, NotChecked=0, Total=50400 [2018-04-11 22:24:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2018-04-11 22:24:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2397. [2018-04-11 22:24:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2397 states. [2018-04-11 22:24:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 2426 transitions. [2018-04-11 22:24:42,903 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 2426 transitions. Word has length 2059 [2018-04-11 22:24:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:24:42,904 INFO L459 AbstractCegarLoop]: Abstraction has 2397 states and 2426 transitions. [2018-04-11 22:24:42,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-04-11 22:24:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 2426 transitions. [2018-04-11 22:24:42,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2234 [2018-04-11 22:24:42,943 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:24:42,944 INFO L355 BasicCegarLoop]: trace histogram [221, 202, 201, 201, 201, 201, 201, 201, 201, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:24:42,944 INFO L408 AbstractCegarLoop]: === Iteration 54 === [__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]=== [2018-04-11 22:24:42,945 INFO L82 PathProgramCache]: Analyzing trace with hash 555044910, now seen corresponding path program 35 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:24:42,956 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:24:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:24:43,361 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:24:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 192960 backedges. 75698 proven. 1258 refuted. 0 times theorem prover too weak. 116004 trivial. 0 not checked. [2018-04-11 22:24:46,264 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:24:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 192960 backedges. 75698 proven. 1258 refuted. 0 times theorem prover too weak. 116004 trivial. 0 not checked. [2018-04-11 22:24:49,568 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:24:49,568 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 112 [2018-04-11 22:24:49,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-04-11 22:24:49,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-04-11 22:24:49,571 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1554, Invalid=10878, Unknown=0, NotChecked=0, Total=12432 [2018-04-11 22:24:49,571 INFO L87 Difference]: Start difference. First operand 2397 states and 2426 transitions. Second operand 112 states. [2018-04-11 22:24:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:24:52,039 INFO L93 Difference]: Finished difference Result 2866 states and 2933 transitions. [2018-04-11 22:24:52,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-04-11 22:24:52,040 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 2233 [2018-04-11 22:24:52,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:24:52,044 INFO L225 Difference]: With dead ends: 2866 [2018-04-11 22:24:52,044 INFO L226 Difference]: Without dead ends: 2407 [2018-04-11 22:24:52,048 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4555 GetRequests, 4317 SyntacticMatches, 39 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16016 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6032, Invalid=34168, Unknown=0, NotChecked=0, Total=40200 [2018-04-11 22:24:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2018-04-11 22:24:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2397. [2018-04-11 22:24:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2397 states. [2018-04-11 22:24:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 2424 transitions. [2018-04-11 22:24:52,120 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 2424 transitions. Word has length 2233 [2018-04-11 22:24:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:24:52,122 INFO L459 AbstractCegarLoop]: Abstraction has 2397 states and 2424 transitions. [2018-04-11 22:24:52,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-04-11 22:24:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 2424 transitions. [2018-04-11 22:24:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2243 [2018-04-11 22:24:52,155 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:24:52,156 INFO L355 BasicCegarLoop]: trace histogram [222, 203, 202, 202, 202, 202, 202, 202, 202, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:24:52,156 INFO L408 AbstractCegarLoop]: === Iteration 55 === [__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]=== [2018-04-11 22:24:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1235970347, now seen corresponding path program 36 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:24:52,165 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:24:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:24:52,559 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:24:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 194810 backedges. 53205 proven. 1976 refuted. 0 times theorem prover too weak. 139629 trivial. 0 not checked. [2018-04-11 22:24:55,726 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:24:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 194810 backedges. 53205 proven. 1976 refuted. 0 times theorem prover too weak. 139629 trivial. 0 not checked. [2018-04-11 22:24:59,215 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:24:59,215 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 121 [2018-04-11 22:24:59,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-04-11 22:24:59,217 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-04-11 22:24:59,218 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1761, Invalid=12759, Unknown=0, NotChecked=0, Total=14520 [2018-04-11 22:24:59,218 INFO L87 Difference]: Start difference. First operand 2397 states and 2424 transitions. Second operand 121 states. [2018-04-11 22:25:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:25:04,087 INFO L93 Difference]: Finished difference Result 3031 states and 3086 transitions. [2018-04-11 22:25:04,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-04-11 22:25:04,088 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 2242 [2018-04-11 22:25:04,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:25:04,092 INFO L225 Difference]: With dead ends: 3031 [2018-04-11 22:25:04,092 INFO L226 Difference]: Without dead ends: 2589 [2018-04-11 22:25:04,098 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4599 GetRequests, 4323 SyntacticMatches, 41 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15539 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7947, Invalid=47985, Unknown=0, NotChecked=0, Total=55932 [2018-04-11 22:25:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2018-04-11 22:25:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2578. [2018-04-11 22:25:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2578 states. [2018-04-11 22:25:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 2605 transitions. [2018-04-11 22:25:04,153 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 2605 transitions. Word has length 2242 [2018-04-11 22:25:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:25:04,154 INFO L459 AbstractCegarLoop]: Abstraction has 2578 states and 2605 transitions. [2018-04-11 22:25:04,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-04-11 22:25:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 2605 transitions. [2018-04-11 22:25:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2426 [2018-04-11 22:25:04,183 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:25:04,183 INFO L355 BasicCegarLoop]: trace histogram [241, 221, 220, 220, 220, 220, 220, 220, 220, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:25:04,183 INFO L408 AbstractCegarLoop]: === Iteration 56 === [__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]=== [2018-04-11 22:25:04,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2087032212, now seen corresponding path program 37 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:25:04,190 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:25:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:25:04,610 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:25:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 230500 backedges. 85748 proven. 1413 refuted. 0 times theorem prover too weak. 143339 trivial. 0 not checked. [2018-04-11 22:25:08,143 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:25:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 230500 backedges. 85748 proven. 1413 refuted. 0 times theorem prover too weak. 143339 trivial. 0 not checked. [2018-04-11 22:25:11,936 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:25:11,936 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 118 [2018-04-11 22:25:11,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-04-11 22:25:11,938 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-04-11 22:25:11,939 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=12090, Unknown=0, NotChecked=0, Total=13806 [2018-04-11 22:25:11,939 INFO L87 Difference]: Start difference. First operand 2578 states and 2605 transitions. Second operand 118 states. [2018-04-11 22:25:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:25:14,657 INFO L93 Difference]: Finished difference Result 3036 states and 3098 transitions. [2018-04-11 22:25:14,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-04-11 22:25:14,658 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 2425 [2018-04-11 22:25:14,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:25:14,661 INFO L225 Difference]: With dead ends: 3036 [2018-04-11 22:25:14,662 INFO L226 Difference]: Without dead ends: 2588 [2018-04-11 22:25:14,667 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4944 GetRequests, 4693 SyntacticMatches, 41 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17884 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6690, Invalid=38042, Unknown=0, NotChecked=0, Total=44732 [2018-04-11 22:25:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2018-04-11 22:25:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2578. [2018-04-11 22:25:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2578 states. [2018-04-11 22:25:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 2603 transitions. [2018-04-11 22:25:14,723 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 2603 transitions. Word has length 2425 [2018-04-11 22:25:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:25:14,724 INFO L459 AbstractCegarLoop]: Abstraction has 2578 states and 2603 transitions. [2018-04-11 22:25:14,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-04-11 22:25:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 2603 transitions. [2018-04-11 22:25:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2435 [2018-04-11 22:25:14,756 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:25:14,756 INFO L355 BasicCegarLoop]: trace histogram [242, 222, 221, 221, 221, 221, 221, 221, 221, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:25:14,756 INFO L408 AbstractCegarLoop]: === Iteration 57 === [__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]=== [2018-04-11 22:25:14,757 INFO L82 PathProgramCache]: Analyzing trace with hash -920922491, now seen corresponding path program 38 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:25:14,763 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:25:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:25:15,174 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:25:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 232523 backedges. 58732 proven. 2190 refuted. 0 times theorem prover too weak. 171601 trivial. 0 not checked. [2018-04-11 22:25:18,784 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:25:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 232523 backedges. 58732 proven. 2190 refuted. 0 times theorem prover too weak. 171601 trivial. 0 not checked. [2018-04-11 22:25:22,699 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:25:22,700 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 127 [2018-04-11 22:25:22,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-04-11 22:25:22,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-04-11 22:25:22,703 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1933, Invalid=14069, Unknown=0, NotChecked=0, Total=16002 [2018-04-11 22:25:22,703 INFO L87 Difference]: Start difference. First operand 2578 states and 2603 transitions. Second operand 127 states. [2018-04-11 22:25:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:25:27,763 INFO L93 Difference]: Finished difference Result 3210 states and 3261 transitions. [2018-04-11 22:25:27,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-04-11 22:25:27,763 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 2434 [2018-04-11 22:25:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:25:27,766 INFO L225 Difference]: With dead ends: 3210 [2018-04-11 22:25:27,766 INFO L226 Difference]: Without dead ends: 2779 [2018-04-11 22:25:27,771 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4989 GetRequests, 4699 SyntacticMatches, 43 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17207 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=8744, Invalid=53008, Unknown=0, NotChecked=0, Total=61752 [2018-04-11 22:25:27,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2018-04-11 22:25:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2768. [2018-04-11 22:25:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2768 states. [2018-04-11 22:25:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 2793 transitions. [2018-04-11 22:25:27,821 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 2793 transitions. Word has length 2434 [2018-04-11 22:25:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:25:27,823 INFO L459 AbstractCegarLoop]: Abstraction has 2768 states and 2793 transitions. [2018-04-11 22:25:27,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-04-11 22:25:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 2793 transitions. [2018-04-11 22:25:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2627 [2018-04-11 22:25:27,856 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:25:27,857 INFO L355 BasicCegarLoop]: trace histogram [262, 241, 240, 240, 240, 240, 240, 240, 240, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:25:27,857 INFO L408 AbstractCegarLoop]: === Iteration 58 === [__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]=== [2018-04-11 22:25:27,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1313133535, now seen corresponding path program 39 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:25:27,865 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:25:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:25:28,299 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 22:25:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 273582 backedges. 96592 proven. 1577 refuted. 0 times theorem prover too weak. 175413 trivial. 0 not checked. [2018-04-11 22:25:32,199 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-11 22:25:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 273582 backedges. 96592 proven. 1577 refuted. 0 times theorem prover too weak. 175413 trivial. 0 not checked. [2018-04-11 22:25:36,575 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 22:25:36,575 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 124 [2018-04-11 22:25:36,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-04-11 22:25:36,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-04-11 22:25:36,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1886, Invalid=13366, Unknown=0, NotChecked=0, Total=15252 [2018-04-11 22:25:36,578 INFO L87 Difference]: Start difference. First operand 2768 states and 2793 transitions. Second operand 124 states. [2018-04-11 22:25:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 22:25:39,109 INFO L93 Difference]: Finished difference Result 3215 states and 3272 transitions. [2018-04-11 22:25:39,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-04-11 22:25:39,109 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 2626 [2018-04-11 22:25:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 22:25:39,113 INFO L225 Difference]: With dead ends: 3215 [2018-04-11 22:25:39,113 INFO L226 Difference]: Without dead ends: 2778 [2018-04-11 22:25:39,119 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 5351 GetRequests, 5087 SyntacticMatches, 43 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19855 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7382, Invalid=42124, Unknown=0, NotChecked=0, Total=49506 [2018-04-11 22:25:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2018-04-11 22:25:39,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2768. [2018-04-11 22:25:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2768 states. [2018-04-11 22:25:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 2791 transitions. [2018-04-11 22:25:39,172 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 2791 transitions. Word has length 2626 [2018-04-11 22:25:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 22:25:39,173 INFO L459 AbstractCegarLoop]: Abstraction has 2768 states and 2791 transitions. [2018-04-11 22:25:39,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-04-11 22:25:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 2791 transitions. [2018-04-11 22:25:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2636 [2018-04-11 22:25:39,208 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 22:25:39,208 INFO L355 BasicCegarLoop]: trace histogram [263, 242, 241, 241, 241, 241, 241, 241, 241, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 22:25:39,208 INFO L408 AbstractCegarLoop]: === Iteration 59 === [__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]=== [2018-04-11 22:25:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash -49906534, now seen corresponding path program 40 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-11 22:25:39,215 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-11 22:25:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 22:25:39,668 INFO L270 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-04-11 22:25:40,433 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-04-11 22:25:40,434 WARN L519 AbstractCegarLoop]: Verification canceled [2018-04-11 22:25:40,438 WARN L197 ceAbstractionStarter]: Timeout [2018-04-11 22:25:40,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.04 10:25:40 BoogieIcfgContainer [2018-04-11 22:25:40,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-04-11 22:25:40,439 INFO L168 Benchmark]: Toolchain (without parser) took 227760.84 ms. Allocated memory was 306.7 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 249.3 MB in the beginning and 783.7 MB in the end (delta: -534.4 MB). Peak memory consumption was 1.5 GB. Max. memory is 5.3 GB. [2018-04-11 22:25:40,440 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 306.7 MB. Free memory is still 268.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-04-11 22:25:40,441 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.25 ms. Allocated memory is still 306.7 MB. Free memory was 249.3 MB in the beginning and 239.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. [2018-04-11 22:25:40,441 INFO L168 Benchmark]: Boogie Preprocessor took 33.41 ms. Allocated memory is still 306.7 MB. Free memory was 239.2 MB in the beginning and 237.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-04-11 22:25:40,441 INFO L168 Benchmark]: RCFGBuilder took 353.73 ms. Allocated memory was 306.7 MB in the beginning and 470.3 MB in the end (delta: 163.6 MB). Free memory was 237.2 MB in the beginning and 436.2 MB in the end (delta: -199.0 MB). Peak memory consumption was 23.8 MB. Max. memory is 5.3 GB. [2018-04-11 22:25:40,442 INFO L168 Benchmark]: TraceAbstraction took 227172.71 ms. Allocated memory was 470.3 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 436.2 MB in the beginning and 783.7 MB in the end (delta: -347.5 MB). Peak memory consumption was 1.5 GB. Max. memory is 5.3 GB. [2018-04-11 22:25:40,444 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 306.7 MB. Free memory is still 268.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 196.25 ms. Allocated memory is still 306.7 MB. Free memory was 249.3 MB in the beginning and 239.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 33.41 ms. Allocated memory is still 306.7 MB. Free memory was 239.2 MB in the beginning and 237.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 353.73 ms. Allocated memory was 306.7 MB in the beginning and 470.3 MB in the end (delta: 163.6 MB). Free memory was 237.2 MB in the beginning and 436.2 MB in the end (delta: -199.0 MB). Peak memory consumption was 23.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 227172.71 ms. Allocated memory was 470.3 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 436.2 MB in the beginning and 783.7 MB in the end (delta: -347.5 MB). Peak memory consumption was 1.5 GB. 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 analyzing trace of length 2636 with TraceHistMax 263, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 60 known predicates. - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 2636 with TraceHistMax 263, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 60 known predicates. - TimeoutResultAtElement [Line: 16]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 16). Cancelled while BasicCegarLoop was analyzing trace of length 2636 with TraceHistMax 263, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 60 known predicates. - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 30). Cancelled while BasicCegarLoop was analyzing trace of length 2636 with TraceHistMax 263, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 60 known predicates. - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 21). Cancelled while BasicCegarLoop was analyzing trace of length 2636 with TraceHistMax 263, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 60 known predicates. - TimeoutResultAtElement [Line: 27]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 27). Cancelled while BasicCegarLoop was analyzing trace of length 2636 with TraceHistMax 263, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 60 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 6 error locations. TIMEOUT Result, 227.1s OverallTime, 59 OverallIterations, 263 TraceHistogramMax, 91.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5547 SDtfs, 20036 SDslu, 74899 SDs, 0 SdLazy, 73595 SolverSat, 5317 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98615 GetRequests, 91789 SyntacticMatches, 1023 SemanticMatches, 5803 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280780 ImplicationChecksByTransitivity, 115.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2768occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 58 MinimizatonAttempts, 782 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 121.9s InterpolantComputationTime, 47942 NumberOfCodeBlocks, 47942 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 95768 ConstructedInterpolants, 1715 QuantifiedInterpolants, 267283095 SizeOfPredicates, 1952 NumberOfNonLiveVariables, 88309 ConjunctsInSsa, 2234 ConjunctsInUnsatCore, 116 InterpolantComputations, 10 PerfectInterpolantSequences, 5311338/5373576 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-0-2018-04-11_22-25-40-453.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-0-2018-04-11_22-25-40-453.csv Completed graceful shutdown