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 0.1.23-35b68b2 [2018-04-06 21:18:41,142 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-04-06 21:18:41,144 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-04-06 21:18:41,159 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-04-06 21:18:41,160 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-04-06 21:18:41,161 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-04-06 21:18:41,162 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-04-06 21:18:41,163 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-04-06 21:18:41,165 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-04-06 21:18:41,166 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-04-06 21:18:41,167 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-04-06 21:18:41,167 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-04-06 21:18:41,168 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-04-06 21:18:41,169 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-04-06 21:18:41,170 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-04-06 21:18:41,172 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-04-06 21:18:41,174 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-04-06 21:18:41,176 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-04-06 21:18:41,177 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-04-06 21:18:41,178 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-04-06 21:18:41,181 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-04-06 21:18:41,181 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-04-06 21:18:41,181 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-04-06 21:18:41,182 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-04-06 21:18:41,183 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-04-06 21:18:41,184 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-04-06 21:18:41,185 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-04-06 21:18:41,185 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-04-06 21:18:41,186 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-04-06 21:18:41,186 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-04-06 21:18:41,187 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-04-06 21:18:41,187 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 [2018-04-06 21:18:41,211 INFO L110 SettingsManager]: Loading preferences was successful [2018-04-06 21:18:41,211 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-04-06 21:18:41,211 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-04-06 21:18:41,212 INFO L133 SettingsManager]: * ultimate.logging.details=de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation=DEBUG; [2018-04-06 21:18:41,212 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-04-06 21:18:41,212 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-04-06 21:18:41,213 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-04-06 21:18:41,213 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-04-06 21:18:41,213 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-04-06 21:18:41,213 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-04-06 21:18:41,214 INFO L131 SettingsManager]: Preferences of LTL2Aut differ from their defaults: [2018-04-06 21:18:41,214 INFO L133 SettingsManager]: * Property to check=[] a a: x > 42 [2018-04-06 21:18:41,214 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-04-06 21:18:41,214 INFO L133 SettingsManager]: * sizeof long=4 [2018-04-06 21:18:41,214 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-04-06 21:18:41,215 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-04-06 21:18:41,215 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-04-06 21:18:41,215 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-04-06 21:18:41,215 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-04-06 21:18:41,215 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-04-06 21:18:41,215 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-04-06 21:18:41,216 INFO L133 SettingsManager]: * sizeof long double=12 [2018-04-06 21:18:41,216 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-04-06 21:18:41,216 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-04-06 21:18:41,216 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-04-06 21:18:41,216 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-04-06 21:18:41,217 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-06 21:18:41,217 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-04-06 21:18:41,217 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-04-06 21:18:41,217 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-04-06 21:18:41,217 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-04-06 21:18:41,217 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-04-06 21:18:41,218 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-06 21:18:41,218 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-04-06 21:18:41,219 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-04-06 21:18:41,219 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-04-06 21:18:41,219 INFO L131 SettingsManager]: Preferences of Boogie Printer differ from their defaults: [2018-04-06 21:18:41,219 INFO L133 SettingsManager]: * Dump path:=C:\Users\alex\AppData\Local\Temp\ [2018-04-06 21:18:41,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-04-06 21:18:41,263 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-04-06 21:18:41,266 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-04-06 21:18:41,268 INFO L271 PluginConnector]: Initializing CDTParser... [2018-04-06 21:18:41,268 INFO L276 PluginConnector]: CDTParser initialized [2018-04-06 21:18:41,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-06 21:18:41,547 INFO L225 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGc66b64752 [2018-04-06 21:18:41,672 INFO L287 CDTParser]: IsIndexed: true [2018-04-06 21:18:41,672 INFO L288 CDTParser]: Found 1 translation units. [2018-04-06 21:18:41,673 INFO L168 CDTParser]: Scanning ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-06 21:18:41,673 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-04-06 21:18:41,674 INFO L215 ultiparseSymbolTable]: [2018-04-06 21:18:41,674 INFO L218 ultiparseSymbolTable]: Function table: [2018-04-06 21:18:41,674 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__foo ('foo') in ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-06 21:18:41,674 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-06 21:18:41,674 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-04-06 21:18:41,674 INFO L233 ultiparseSymbolTable]: [2018-04-06 21:18:41,691 INFO L330 CDTParser]: Deleted temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGc66b64752 [2018-04-06 21:18:41,695 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-04-06 21:18:41,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-04-06 21:18:41,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-04-06 21:18:41,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-04-06 21:18:41,705 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-04-06 21:18:41,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:18:41" (1/1) ... [2018-04-06 21:18:41,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b54e99a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41, skipping insertion in model container [2018-04-06 21:18:41,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:18:41" (1/1) ... [2018-04-06 21:18:41,721 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-06 21:18:41,733 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-06 21:18:41,879 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-06 21:18:41,901 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-06 21:18:41,906 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 9 non ball SCCs. Number of states in SCCs 9. [2018-04-06 21:18:41,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41 WrapperNode [2018-04-06 21:18:41,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-04-06 21:18:41,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-04-06 21:18:41,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-04-06 21:18:41,915 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-04-06 21:18:41,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41" (1/1) ... [2018-04-06 21:18:41,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41" (1/1) ... [2018-04-06 21:18:41,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41" (1/1) ... [2018-04-06 21:18:41,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41" (1/1) ... [2018-04-06 21:18:41,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41" (1/1) ... [2018-04-06 21:18:41,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41" (1/1) ... [2018-04-06 21:18:41,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41" (1/1) ... [2018-04-06 21:18:41,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-04-06 21:18:41,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-04-06 21:18:41,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-04-06 21:18:41,944 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-04-06 21:18:41,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41" (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 [2018-04-06 21:18:42,000 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-04-06 21:18:42,000 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-04-06 21:18:42,000 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__foo [2018-04-06 21:18:42,000 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-04-06 21:18:42,000 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_c__foo [2018-04-06 21:18:42,001 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-04-06 21:18:42,001 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-04-06 21:18:42,001 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-04-06 21:18:42,001 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-04-06 21:18:42,001 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-04-06 21:18:42,001 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-04-06 21:18:42,001 INFO L128 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-04-06 21:18:42,002 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-04-06 21:18:42,233 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-04-06 21:18:42,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:18:42 BoogieIcfgContainer [2018-04-06 21:18:42,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-04-06 21:18:42,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-04-06 21:18:42,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-04-06 21:18:42,237 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-04-06 21:18:42,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:18:41" (1/3) ... [2018-04-06 21:18:42,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16565841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:18:42, skipping insertion in model container [2018-04-06 21:18:42,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:18:41" (2/3) ... [2018-04-06 21:18:42,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16565841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:18:42, skipping insertion in model container [2018-04-06 21:18:42,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:18:42" (3/3) ... [2018-04-06 21:18:42,239 INFO L107 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5_true-valid-memsafety.c [2018-04-06 21:18:42,246 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-04-06 21:18:42,251 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-04-06 21:18:42,296 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-04-06 21:18:42,297 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-04-06 21:18:42,297 INFO L370 AbstractCegarLoop]: Hoare is true [2018-04-06 21:18:42,297 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-04-06 21:18:42,297 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-04-06 21:18:42,297 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-04-06 21:18:42,298 INFO L374 AbstractCegarLoop]: Difference is false [2018-04-06 21:18:42,298 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-04-06 21:18:42,298 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-04-06 21:18:42,298 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-04-06 21:18:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-04-06 21:18:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-04-06 21:18:42,316 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:42,316 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-06 21:18:42,316 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]=== [2018-04-06 21:18:42,320 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 [2018-04-06 21:18:42,334 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:42,378 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:42,420 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:42,462 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-06 21:18:42,463 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2018-04-06 21:18:42,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-06 21:18:42,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-06 21:18:42,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-06 21:18:42,476 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 4 states. [2018-04-06 21:18:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:42,599 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2018-04-06 21:18:42,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-06 21:18:42,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-04-06 21:18:42,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:42,608 INFO L225 Difference]: With dead ends: 141 [2018-04-06 21:18:42,608 INFO L226 Difference]: Without dead ends: 84 [2018-04-06 21:18:42,611 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 [2018-04-06 21:18:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-04-06 21:18:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2018-04-06 21:18:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-04-06 21:18:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2018-04-06 21:18:42,656 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 16 [2018-04-06 21:18:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:42,656 INFO L459 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2018-04-06 21:18:42,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-06 21:18:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2018-04-06 21:18:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-04-06 21:18:42,658 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:42,658 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] [2018-04-06 21:18:42,658 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]=== [2018-04-06 21:18:42,659 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 [2018-04-06 21:18:42,668 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:42,685 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:42,700 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:42,765 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-06 21:18:42,766 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2018-04-06 21:18:42,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-06 21:18:42,767 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-06 21:18:42,767 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-06 21:18:42,768 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 4 states. [2018-04-06 21:18:42,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:42,805 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2018-04-06 21:18:42,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-04-06 21:18:42,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-04-06 21:18:42,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:42,807 INFO L225 Difference]: With dead ends: 82 [2018-04-06 21:18:42,808 INFO L226 Difference]: Without dead ends: 81 [2018-04-06 21:18:42,808 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 [2018-04-06 21:18:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-04-06 21:18:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2018-04-06 21:18:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-04-06 21:18:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2018-04-06 21:18:42,815 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 25 [2018-04-06 21:18:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:42,815 INFO L459 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2018-04-06 21:18:42,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-06 21:18:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2018-04-06 21:18:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-04-06 21:18:42,816 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:42,816 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] [2018-04-06 21:18:42,817 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]=== [2018-04-06 21:18:42,817 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 [2018-04-06 21:18:42,833 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:42,855 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:42,884 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:42,957 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-06 21:18:42,957 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2018-04-06 21:18:42,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-06 21:18:42,958 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-06 21:18:42,959 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-04-06 21:18:42,959 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 7 states. [2018-04-06 21:18:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:43,078 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2018-04-06 21:18:43,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-04-06 21:18:43,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2018-04-06 21:18:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:43,080 INFO L225 Difference]: With dead ends: 150 [2018-04-06 21:18:43,080 INFO L226 Difference]: Without dead ends: 95 [2018-04-06 21:18:43,080 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-04-06 21:18:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-04-06 21:18:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2018-04-06 21:18:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-04-06 21:18:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2018-04-06 21:18:43,088 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 26 [2018-04-06 21:18:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:43,088 INFO L459 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2018-04-06 21:18:43,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-06 21:18:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2018-04-06 21:18:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-04-06 21:18:43,089 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:43,089 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] [2018-04-06 21:18:43,090 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]=== [2018-04-06 21:18:43,090 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 [2018-04-06 21:18:43,102 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:43,128 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:43,164 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:43,261 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-06 21:18:43,262 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-04-06 21:18:43,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-04-06 21:18:43,262 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-04-06 21:18:43,262 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-04-06 21:18:43,263 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 9 states. [2018-04-06 21:18:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:43,359 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2018-04-06 21:18:43,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-04-06 21:18:43,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-04-06 21:18:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:43,360 INFO L225 Difference]: With dead ends: 97 [2018-04-06 21:18:43,360 INFO L226 Difference]: Without dead ends: 96 [2018-04-06 21:18:43,361 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-04-06 21:18:43,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-04-06 21:18:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2018-04-06 21:18:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-04-06 21:18:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2018-04-06 21:18:43,368 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 37 [2018-04-06 21:18:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:43,368 INFO L459 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2018-04-06 21:18:43,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-04-06 21:18:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2018-04-06 21:18:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-04-06 21:18:43,369 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:43,370 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] [2018-04-06 21:18:43,370 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]=== [2018-04-06 21:18:43,370 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 [2018-04-06 21:18:43,378 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:43,408 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:43,429 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:43,480 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:43,481 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-04-06 21:18:43,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-06 21:18:43,481 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-06 21:18:43,481 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-04-06 21:18:43,482 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 8 states. [2018-04-06 21:18:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:43,593 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2018-04-06 21:18:43,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-06 21:18:43,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2018-04-06 21:18:43,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:43,595 INFO L225 Difference]: With dead ends: 130 [2018-04-06 21:18:43,595 INFO L226 Difference]: Without dead ends: 110 [2018-04-06 21:18:43,596 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 [2018-04-06 21:18:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-04-06 21:18:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2018-04-06 21:18:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-04-06 21:18:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2018-04-06 21:18:43,605 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 44 [2018-04-06 21:18:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:43,606 INFO L459 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2018-04-06 21:18:43,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-06 21:18:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2018-04-06 21:18:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-04-06 21:18:43,607 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:43,607 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] [2018-04-06 21:18:43,607 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]=== [2018-04-06 21:18:43,608 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 [2018-04-06 21:18:43,622 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:43,641 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:43,673 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-04-06 21:18:43,675 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-06 21:18:43,701 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-06 21:18:43,701 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-04-06 21:18:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-06 21:18:43,835 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-06 21:18:43,893 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:43,893 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2018-04-06 21:18:43,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-06 21:18:43,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-06 21:18:43,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-04-06 21:18:43,894 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 7 states. [2018-04-06 21:18:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:43,996 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2018-04-06 21:18:43,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-06 21:18:43,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2018-04-06 21:18:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:43,998 INFO L225 Difference]: With dead ends: 100 [2018-04-06 21:18:43,998 INFO L226 Difference]: Without dead ends: 99 [2018-04-06 21:18:43,999 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-04-06 21:18:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-04-06 21:18:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-04-06 21:18:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-04-06 21:18:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2018-04-06 21:18:44,010 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 47 [2018-04-06 21:18:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:44,011 INFO L459 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2018-04-06 21:18:44,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-06 21:18:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2018-04-06 21:18:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-04-06 21:18:44,013 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:44,013 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] [2018-04-06 21:18:44,013 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]=== [2018-04-06 21:18:44,013 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 [2018-04-06 21:18:44,029 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:44,052 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:44,068 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 [2018-04-06 21:18:44,068 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-06 21:18:44,072 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-06 21:18:44,072 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-06 21:18:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-06 21:18:44,128 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-06 21:18:44,204 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:44,204 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2018-04-06 21:18:44,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-04-06 21:18:44,205 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-04-06 21:18:44,205 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-04-06 21:18:44,205 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 13 states. [2018-04-06 21:18:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:44,319 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2018-04-06 21:18:44,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-06 21:18:44,319 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-04-06 21:18:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:44,320 INFO L225 Difference]: With dead ends: 108 [2018-04-06 21:18:44,321 INFO L226 Difference]: Without dead ends: 107 [2018-04-06 21:18:44,321 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 [2018-04-06 21:18:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-04-06 21:18:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-04-06 21:18:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-04-06 21:18:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2018-04-06 21:18:44,333 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 47 [2018-04-06 21:18:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:44,333 INFO L459 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2018-04-06 21:18:44,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-04-06 21:18:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2018-04-06 21:18:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-04-06 21:18:44,334 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:44,334 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] [2018-04-06 21:18:44,335 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]=== [2018-04-06 21:18:44,335 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 [2018-04-06 21:18:44,344 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:44,363 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:44,415 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-06 21:18:44,494 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:44,494 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-04-06 21:18:44,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-04-06 21:18:44,494 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-04-06 21:18:44,495 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-04-06 21:18:44,495 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 13 states. [2018-04-06 21:18:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:44,661 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2018-04-06 21:18:44,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-04-06 21:18:44,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-04-06 21:18:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:44,663 INFO L225 Difference]: With dead ends: 192 [2018-04-06 21:18:44,663 INFO L226 Difference]: Without dead ends: 130 [2018-04-06 21:18:44,664 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 [2018-04-06 21:18:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-04-06 21:18:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 119. [2018-04-06 21:18:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-04-06 21:18:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2018-04-06 21:18:44,674 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 55 [2018-04-06 21:18:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:44,674 INFO L459 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2018-04-06 21:18:44,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-04-06 21:18:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2018-04-06 21:18:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-04-06 21:18:44,676 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:44,676 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] [2018-04-06 21:18:44,676 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]=== [2018-04-06 21:18:44,677 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 [2018-04-06 21:18:44,683 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:44,710 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-04-06 21:18:44,760 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-04-06 21:18:44,868 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-06 21:18:44,869 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2018-04-06 21:18:44,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-04-06 21:18:44,869 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-04-06 21:18:44,869 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-04-06 21:18:44,870 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand 10 states. [2018-04-06 21:18:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:44,999 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2018-04-06 21:18:45,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-04-06 21:18:45,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2018-04-06 21:18:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:45,001 INFO L225 Difference]: With dead ends: 201 [2018-04-06 21:18:45,001 INFO L226 Difference]: Without dead ends: 133 [2018-04-06 21:18:45,001 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 [2018-04-06 21:18:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-04-06 21:18:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2018-04-06 21:18:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-04-06 21:18:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2018-04-06 21:18:45,009 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 76 [2018-04-06 21:18:45,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:45,009 INFO L459 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2018-04-06 21:18:45,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-04-06 21:18:45,010 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2018-04-06 21:18:45,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-04-06 21:18:45,011 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:45,011 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] [2018-04-06 21:18:45,011 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]=== [2018-04-06 21:18:45,011 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 [2018-04-06 21:18:45,020 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:45,043 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-04-06 21:18:45,056 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-04-06 21:18:45,103 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:45,103 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-04-06 21:18:45,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-06 21:18:45,104 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-06 21:18:45,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-04-06 21:18:45,104 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 8 states. [2018-04-06 21:18:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:45,180 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2018-04-06 21:18:45,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-06 21:18:45,181 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2018-04-06 21:18:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:45,182 INFO L225 Difference]: With dead ends: 150 [2018-04-06 21:18:45,182 INFO L226 Difference]: Without dead ends: 149 [2018-04-06 21:18:45,183 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 [2018-04-06 21:18:45,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-04-06 21:18:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2018-04-06 21:18:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-04-06 21:18:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2018-04-06 21:18:45,190 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 85 [2018-04-06 21:18:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:45,190 INFO L459 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2018-04-06 21:18:45,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-06 21:18:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2018-04-06 21:18:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-04-06 21:18:45,191 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:45,191 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] [2018-04-06 21:18:45,191 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]=== [2018-04-06 21:18:45,191 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 [2018-04-06 21:18:45,197 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:45,220 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:45,223 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 [2018-04-06 21:18:45,224 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-06 21:18:45,227 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-06 21:18:45,227 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-06 21:18:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-04-06 21:18:45,375 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-04-06 21:18:45,546 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:45,546 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2018-04-06 21:18:45,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-04-06 21:18:45,546 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-04-06 21:18:45,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-04-06 21:18:45,547 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 17 states. [2018-04-06 21:18:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:45,875 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2018-04-06 21:18:45,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-04-06 21:18:45,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 86 [2018-04-06 21:18:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:45,876 INFO L225 Difference]: With dead ends: 144 [2018-04-06 21:18:45,876 INFO L226 Difference]: Without dead ends: 143 [2018-04-06 21:18:45,876 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 [2018-04-06 21:18:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-04-06 21:18:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2018-04-06 21:18:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-04-06 21:18:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 142 transitions. [2018-04-06 21:18:45,885 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 142 transitions. Word has length 86 [2018-04-06 21:18:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:45,885 INFO L459 AbstractCegarLoop]: Abstraction has 137 states and 142 transitions. [2018-04-06 21:18:45,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-04-06 21:18:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 142 transitions. [2018-04-06 21:18:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-04-06 21:18:45,887 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:45,887 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] [2018-04-06 21:18:45,887 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]=== [2018-04-06 21:18:45,887 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 [2018-04-06 21:18:45,896 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:45,929 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 91 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-06 21:18:46,000 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 91 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-06 21:18:46,098 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:46,098 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-04-06 21:18:46,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-06 21:18:46,099 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-06 21:18:46,099 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-04-06 21:18:46,099 INFO L87 Difference]: Start difference. First operand 137 states and 142 transitions. Second operand 19 states. [2018-04-06 21:18:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:46,380 INFO L93 Difference]: Finished difference Result 256 states and 269 transitions. [2018-04-06 21:18:46,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-06 21:18:46,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 103 [2018-04-06 21:18:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:46,381 INFO L225 Difference]: With dead ends: 256 [2018-04-06 21:18:46,382 INFO L226 Difference]: Without dead ends: 184 [2018-04-06 21:18:46,383 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 [2018-04-06 21:18:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-04-06 21:18:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 168. [2018-04-06 21:18:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-04-06 21:18:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2018-04-06 21:18:46,391 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 103 [2018-04-06 21:18:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:46,391 INFO L459 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2018-04-06 21:18:46,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-06 21:18:46,391 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2018-04-06 21:18:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-04-06 21:18:46,392 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:46,392 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] [2018-04-06 21:18:46,392 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]=== [2018-04-06 21:18:46,392 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 [2018-04-06 21:18:46,398 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:46,424 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-04-06 21:18:46,493 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-04-06 21:18:46,612 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:46,613 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-04-06 21:18:46,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-06 21:18:46,613 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-06 21:18:46,613 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-04-06 21:18:46,614 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 16 states. [2018-04-06 21:18:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:46,852 INFO L93 Difference]: Finished difference Result 256 states and 266 transitions. [2018-04-06 21:18:46,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-04-06 21:18:46,852 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2018-04-06 21:18:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:46,853 INFO L225 Difference]: With dead ends: 256 [2018-04-06 21:18:46,853 INFO L226 Difference]: Without dead ends: 178 [2018-04-06 21:18:46,854 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 187 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2018-04-06 21:18:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-04-06 21:18:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2018-04-06 21:18:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-04-06 21:18:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2018-04-06 21:18:46,864 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 104 [2018-04-06 21:18:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:46,864 INFO L459 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2018-04-06 21:18:46,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-06 21:18:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2018-04-06 21:18:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-04-06 21:18:46,866 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:46,866 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] [2018-04-06 21:18:46,866 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]=== [2018-04-06 21:18:46,867 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 [2018-04-06 21:18:46,881 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:46,903 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-06 21:18:46,932 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-06 21:18:47,012 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:47,012 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-04-06 21:18:47,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-06 21:18:47,013 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-06 21:18:47,013 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-04-06 21:18:47,013 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 16 states. [2018-04-06 21:18:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:47,200 INFO L93 Difference]: Finished difference Result 239 states and 250 transitions. [2018-04-06 21:18:47,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-06 21:18:47,200 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 113 [2018-04-06 21:18:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:47,201 INFO L225 Difference]: With dead ends: 239 [2018-04-06 21:18:47,201 INFO L226 Difference]: Without dead ends: 219 [2018-04-06 21:18:47,202 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 [2018-04-06 21:18:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-04-06 21:18:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 209. [2018-04-06 21:18:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-04-06 21:18:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 216 transitions. [2018-04-06 21:18:47,210 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 216 transitions. Word has length 113 [2018-04-06 21:18:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:47,211 INFO L459 AbstractCegarLoop]: Abstraction has 209 states and 216 transitions. [2018-04-06 21:18:47,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-06 21:18:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 216 transitions. [2018-04-06 21:18:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-04-06 21:18:47,212 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:47,213 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] [2018-04-06 21:18:47,213 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]=== [2018-04-06 21:18:47,213 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 [2018-04-06 21:18:47,223 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:47,256 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 165 proven. 48 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-06 21:18:47,438 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 165 proven. 48 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-04-06 21:18:47,572 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:47,573 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2018-04-06 21:18:47,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-06 21:18:47,573 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-06 21:18:47,573 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-04-06 21:18:47,574 INFO L87 Difference]: Start difference. First operand 209 states and 216 transitions. Second operand 25 states. [2018-04-06 21:18:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:47,944 INFO L93 Difference]: Finished difference Result 359 states and 374 transitions. [2018-04-06 21:18:47,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-04-06 21:18:47,944 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 142 [2018-04-06 21:18:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:47,946 INFO L225 Difference]: With dead ends: 359 [2018-04-06 21:18:47,946 INFO L226 Difference]: Without dead ends: 257 [2018-04-06 21:18:47,947 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2018-04-06 21:18:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-04-06 21:18:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 246. [2018-04-06 21:18:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-04-06 21:18:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 253 transitions. [2018-04-06 21:18:47,960 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 253 transitions. Word has length 142 [2018-04-06 21:18:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:47,960 INFO L459 AbstractCegarLoop]: Abstraction has 246 states and 253 transitions. [2018-04-06 21:18:47,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-06 21:18:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 253 transitions. [2018-04-06 21:18:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-04-06 21:18:47,961 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:47,961 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] [2018-04-06 21:18:47,961 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]=== [2018-04-06 21:18:47,962 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 [2018-04-06 21:18:47,967 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:48,003 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 384 proven. 13 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-04-06 21:18:48,136 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 384 proven. 13 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-04-06 21:18:48,383 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:48,383 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-04-06 21:18:48,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-04-06 21:18:48,384 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-04-06 21:18:48,384 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-04-06 21:18:48,384 INFO L87 Difference]: Start difference. First operand 246 states and 253 transitions. Second operand 22 states. [2018-04-06 21:18:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:48,736 INFO L93 Difference]: Finished difference Result 368 states and 382 transitions. [2018-04-06 21:18:48,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-04-06 21:18:48,736 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 181 [2018-04-06 21:18:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:48,738 INFO L225 Difference]: With dead ends: 368 [2018-04-06 21:18:48,739 INFO L226 Difference]: Without dead ends: 260 [2018-04-06 21:18:48,740 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 [2018-04-06 21:18:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-04-06 21:18:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 246. [2018-04-06 21:18:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-04-06 21:18:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2018-04-06 21:18:48,752 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 181 [2018-04-06 21:18:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:48,753 INFO L459 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2018-04-06 21:18:48,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-04-06 21:18:48,753 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2018-04-06 21:18:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-04-06 21:18:48,754 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:48,754 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] [2018-04-06 21:18:48,754 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]=== [2018-04-06 21:18:48,754 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 [2018-04-06 21:18:48,763 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:48,804 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 212 proven. 36 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2018-04-06 21:18:48,844 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 212 proven. 36 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2018-04-06 21:18:48,951 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:48,951 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-04-06 21:18:48,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-06 21:18:48,952 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-06 21:18:48,952 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-04-06 21:18:48,952 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 16 states. [2018-04-06 21:18:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:49,257 INFO L93 Difference]: Finished difference Result 303 states and 323 transitions. [2018-04-06 21:18:49,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-06 21:18:49,257 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 190 [2018-04-06 21:18:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:49,260 INFO L225 Difference]: With dead ends: 303 [2018-04-06 21:18:49,260 INFO L226 Difference]: Without dead ends: 302 [2018-04-06 21:18:49,262 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 [2018-04-06 21:18:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-04-06 21:18:49,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 281. [2018-04-06 21:18:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-04-06 21:18:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 293 transitions. [2018-04-06 21:18:49,280 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 293 transitions. Word has length 190 [2018-04-06 21:18:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:49,280 INFO L459 AbstractCegarLoop]: Abstraction has 281 states and 293 transitions. [2018-04-06 21:18:49,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-06 21:18:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 293 transitions. [2018-04-06 21:18:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-04-06 21:18:49,282 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:49,282 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] [2018-04-06 21:18:49,282 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]=== [2018-04-06 21:18:49,282 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 [2018-04-06 21:18:49,291 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:49,347 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:49,352 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 [2018-04-06 21:18:49,352 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-06 21:18:49,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-06 21:18:49,367 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-06 21:18:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 238 proven. 47 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-04-06 21:18:49,684 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 238 proven. 47 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-04-06 21:18:50,024 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:50,024 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-04-06 21:18:50,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-06 21:18:50,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-06 21:18:50,025 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2018-04-06 21:18:50,025 INFO L87 Difference]: Start difference. First operand 281 states and 293 transitions. Second operand 25 states. [2018-04-06 21:18:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:50,925 INFO L93 Difference]: Finished difference Result 295 states and 315 transitions. [2018-04-06 21:18:50,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-04-06 21:18:50,925 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 191 [2018-04-06 21:18:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:50,926 INFO L225 Difference]: With dead ends: 295 [2018-04-06 21:18:50,926 INFO L226 Difference]: Without dead ends: 294 [2018-04-06 21:18:50,927 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 [2018-04-06 21:18:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-04-06 21:18:50,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 282. [2018-04-06 21:18:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-04-06 21:18:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 291 transitions. [2018-04-06 21:18:50,942 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 291 transitions. Word has length 191 [2018-04-06 21:18:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:50,943 INFO L459 AbstractCegarLoop]: Abstraction has 282 states and 291 transitions. [2018-04-06 21:18:50,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-06 21:18:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 291 transitions. [2018-04-06 21:18:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-04-06 21:18:50,944 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:50,945 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] [2018-04-06 21:18:50,945 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]=== [2018-04-06 21:18:50,945 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 [2018-04-06 21:18:50,956 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:51,003 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 660 proven. 86 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-04-06 21:18:51,289 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 660 proven. 86 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-04-06 21:18:51,492 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:51,501 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2018-04-06 21:18:51,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-04-06 21:18:51,502 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-04-06 21:18:51,502 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2018-04-06 21:18:51,502 INFO L87 Difference]: Start difference. First operand 282 states and 291 transitions. Second operand 31 states. [2018-04-06 21:18:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:51,985 INFO L93 Difference]: Finished difference Result 466 states and 485 transitions. [2018-04-06 21:18:51,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-04-06 21:18:51,985 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 226 [2018-04-06 21:18:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:51,988 INFO L225 Difference]: With dead ends: 466 [2018-04-06 21:18:51,988 INFO L226 Difference]: Without dead ends: 339 [2018-04-06 21:18:51,989 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 411 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2018-04-06 21:18:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-04-06 21:18:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-04-06 21:18:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-04-06 21:18:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 337 transitions. [2018-04-06 21:18:52,001 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 337 transitions. Word has length 226 [2018-04-06 21:18:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:52,001 INFO L459 AbstractCegarLoop]: Abstraction has 328 states and 337 transitions. [2018-04-06 21:18:52,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-04-06 21:18:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 337 transitions. [2018-04-06 21:18:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-04-06 21:18:52,003 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:52,003 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] [2018-04-06 21:18:52,003 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]=== [2018-04-06 21:18:52,003 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 [2018-04-06 21:18:52,010 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:52,064 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 1064 proven. 33 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-04-06 21:18:52,200 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 1064 proven. 33 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-04-06 21:18:52,427 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:52,427 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2018-04-06 21:18:52,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-04-06 21:18:52,428 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-04-06 21:18:52,428 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2018-04-06 21:18:52,428 INFO L87 Difference]: Start difference. First operand 328 states and 337 transitions. Second operand 28 states. [2018-04-06 21:18:52,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:52,744 INFO L93 Difference]: Finished difference Result 471 states and 488 transitions. [2018-04-06 21:18:52,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-04-06 21:18:52,745 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 274 [2018-04-06 21:18:52,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:52,746 INFO L225 Difference]: With dead ends: 471 [2018-04-06 21:18:52,746 INFO L226 Difference]: Without dead ends: 338 [2018-04-06 21:18:52,747 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 [2018-04-06 21:18:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-04-06 21:18:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 328. [2018-04-06 21:18:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-04-06 21:18:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 335 transitions. [2018-04-06 21:18:52,761 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 335 transitions. Word has length 274 [2018-04-06 21:18:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:52,762 INFO L459 AbstractCegarLoop]: Abstraction has 328 states and 335 transitions. [2018-04-06 21:18:52,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-04-06 21:18:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 335 transitions. [2018-04-06 21:18:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-04-06 21:18:52,764 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:52,764 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] [2018-04-06 21:18:52,764 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]=== [2018-04-06 21:18:52,765 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 [2018-04-06 21:18:52,771 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:52,822 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:53,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 964 proven. 135 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-04-06 21:18:53,037 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 964 proven. 135 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2018-04-06 21:18:53,309 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:53,309 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 37 [2018-04-06 21:18:53,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-04-06 21:18:53,310 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-04-06 21:18:53,310 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-04-06 21:18:53,310 INFO L87 Difference]: Start difference. First operand 328 states and 335 transitions. Second operand 37 states. [2018-04-06 21:18:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:53,976 INFO L93 Difference]: Finished difference Result 510 states and 525 transitions. [2018-04-06 21:18:53,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-04-06 21:18:53,977 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 283 [2018-04-06 21:18:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:53,978 INFO L225 Difference]: With dead ends: 510 [2018-04-06 21:18:53,978 INFO L226 Difference]: Without dead ends: 394 [2018-04-06 21:18:53,979 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 [2018-04-06 21:18:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-04-06 21:18:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 383. [2018-04-06 21:18:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-04-06 21:18:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 390 transitions. [2018-04-06 21:18:53,989 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 390 transitions. Word has length 283 [2018-04-06 21:18:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:53,990 INFO L459 AbstractCegarLoop]: Abstraction has 383 states and 390 transitions. [2018-04-06 21:18:53,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-04-06 21:18:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 390 transitions. [2018-04-06 21:18:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-04-06 21:18:53,992 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:53,992 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] [2018-04-06 21:18:53,992 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]=== [2018-04-06 21:18:53,992 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 [2018-04-06 21:18:53,999 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:54,064 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 1337 proven. 62 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2018-04-06 21:18:54,273 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 697 proven. 230 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2018-04-06 21:18:54,665 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:54,666 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2018-04-06 21:18:54,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-04-06 21:18:54,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-04-06 21:18:54,667 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2018-04-06 21:18:54,667 INFO L87 Difference]: Start difference. First operand 383 states and 390 transitions. Second operand 34 states. [2018-04-06 21:18:55,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:55,414 INFO L93 Difference]: Finished difference Result 515 states and 527 transitions. [2018-04-06 21:18:55,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-04-06 21:18:55,414 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 332 [2018-04-06 21:18:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:55,416 INFO L225 Difference]: With dead ends: 515 [2018-04-06 21:18:55,416 INFO L226 Difference]: Without dead ends: 393 [2018-04-06 21:18:55,417 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 [2018-04-06 21:18:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2018-04-06 21:18:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 383. [2018-04-06 21:18:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-04-06 21:18:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 388 transitions. [2018-04-06 21:18:55,428 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 388 transitions. Word has length 332 [2018-04-06 21:18:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:55,428 INFO L459 AbstractCegarLoop]: Abstraction has 383 states and 388 transitions. [2018-04-06 21:18:55,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-04-06 21:18:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 388 transitions. [2018-04-06 21:18:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-04-06 21:18:55,431 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:55,431 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] [2018-04-06 21:18:55,432 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]=== [2018-04-06 21:18:55,432 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 [2018-04-06 21:18:55,442 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:55,524 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2796 backedges. 1325 proven. 195 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-04-06 21:18:56,300 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2796 backedges. 1325 proven. 195 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-04-06 21:18:56,644 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:56,644 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 43 [2018-04-06 21:18:56,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-04-06 21:18:56,645 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-04-06 21:18:56,646 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2018-04-06 21:18:56,646 INFO L87 Difference]: Start difference. First operand 383 states and 388 transitions. Second operand 43 states. [2018-04-06 21:18:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:57,611 INFO L93 Difference]: Finished difference Result 574 states and 587 transitions. [2018-04-06 21:18:57,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-04-06 21:18:57,611 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 349 [2018-04-06 21:18:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:57,614 INFO L225 Difference]: With dead ends: 574 [2018-04-06 21:18:57,614 INFO L226 Difference]: Without dead ends: 466 [2018-04-06 21:18:57,616 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 [2018-04-06 21:18:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2018-04-06 21:18:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 450. [2018-04-06 21:18:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-04-06 21:18:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 456 transitions. [2018-04-06 21:18:57,633 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 456 transitions. Word has length 349 [2018-04-06 21:18:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:57,634 INFO L459 AbstractCegarLoop]: Abstraction has 450 states and 456 transitions. [2018-04-06 21:18:57,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-04-06 21:18:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 456 transitions. [2018-04-06 21:18:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-04-06 21:18:57,637 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:57,637 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] [2018-04-06 21:18:57,638 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]=== [2018-04-06 21:18:57,638 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 [2018-04-06 21:18:57,647 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:57,727 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 1058 proven. 100 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2018-04-06 21:18:58,023 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2445 backedges. 1058 proven. 100 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2018-04-06 21:18:58,464 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:58,464 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 40 [2018-04-06 21:18:58,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-04-06 21:18:58,465 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-04-06 21:18:58,466 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-04-06 21:18:58,466 INFO L87 Difference]: Start difference. First operand 450 states and 456 transitions. Second operand 40 states. [2018-04-06 21:18:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:18:58,992 INFO L93 Difference]: Finished difference Result 574 states and 584 transitions. [2018-04-06 21:18:58,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-06 21:18:58,993 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 350 [2018-04-06 21:18:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:18:58,994 INFO L225 Difference]: With dead ends: 574 [2018-04-06 21:18:58,994 INFO L226 Difference]: Without dead ends: 460 [2018-04-06 21:18:58,996 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 647 SyntacticMatches, 15 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=3904, Unknown=0, NotChecked=0, Total=4692 [2018-04-06 21:18:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2018-04-06 21:18:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2018-04-06 21:18:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-04-06 21:18:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 454 transitions. [2018-04-06 21:18:59,015 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 454 transitions. Word has length 350 [2018-04-06 21:18:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:18:59,015 INFO L459 AbstractCegarLoop]: Abstraction has 450 states and 454 transitions. [2018-04-06 21:18:59,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-04-06 21:18:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 454 transitions. [2018-04-06 21:18:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-04-06 21:18:59,018 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:18:59,018 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] [2018-04-06 21:18:59,018 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]=== [2018-04-06 21:18:59,019 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 [2018-04-06 21:18:59,028 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:18:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:18:59,127 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:18:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-04-06 21:18:59,404 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:18:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2639 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-04-06 21:18:59,645 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:18:59,646 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-04-06 21:18:59,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-04-06 21:18:59,646 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-04-06 21:18:59,646 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2018-04-06 21:18:59,647 INFO L87 Difference]: Start difference. First operand 450 states and 454 transitions. Second operand 32 states. [2018-04-06 21:19:00,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:00,069 INFO L93 Difference]: Finished difference Result 565 states and 584 transitions. [2018-04-06 21:19:00,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-06 21:19:00,070 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 359 [2018-04-06 21:19:00,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:00,072 INFO L225 Difference]: With dead ends: 565 [2018-04-06 21:19:00,072 INFO L226 Difference]: Without dead ends: 545 [2018-04-06 21:19:00,074 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1155, Invalid=2385, Unknown=0, NotChecked=0, Total=3540 [2018-04-06 21:19:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2018-04-06 21:19:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 535. [2018-04-06 21:19:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2018-04-06 21:19:00,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 546 transitions. [2018-04-06 21:19:00,096 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 546 transitions. Word has length 359 [2018-04-06 21:19:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:00,097 INFO L459 AbstractCegarLoop]: Abstraction has 535 states and 546 transitions. [2018-04-06 21:19:00,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-04-06 21:19:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 546 transitions. [2018-04-06 21:19:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2018-04-06 21:19:00,100 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:00,100 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] [2018-04-06 21:19:00,100 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]=== [2018-04-06 21:19:00,101 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 [2018-04-06 21:19:00,110 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:00,193 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4403 backedges. 1743 proven. 266 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-04-06 21:19:00,596 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4403 backedges. 1743 proven. 266 refuted. 0 times theorem prover too weak. 2394 trivial. 0 not checked. [2018-04-06 21:19:01,018 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:01,018 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 49 [2018-04-06 21:19:01,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-04-06 21:19:01,019 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-04-06 21:19:01,020 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2018-04-06 21:19:01,020 INFO L87 Difference]: Start difference. First operand 535 states and 546 transitions. Second operand 49 states. [2018-04-06 21:19:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:02,056 INFO L93 Difference]: Finished difference Result 801 states and 824 transitions. [2018-04-06 21:19:02,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-04-06 21:19:02,056 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 424 [2018-04-06 21:19:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:02,059 INFO L225 Difference]: With dead ends: 801 [2018-04-06 21:19:02,059 INFO L226 Difference]: Without dead ends: 619 [2018-04-06 21:19:02,061 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 783 SyntacticMatches, 17 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1347, Invalid=7209, Unknown=0, NotChecked=0, Total=8556 [2018-04-06 21:19:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2018-04-06 21:19:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 608. [2018-04-06 21:19:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-04-06 21:19:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 619 transitions. [2018-04-06 21:19:02,086 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 619 transitions. Word has length 424 [2018-04-06 21:19:02,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:02,087 INFO L459 AbstractCegarLoop]: Abstraction has 608 states and 619 transitions. [2018-04-06 21:19:02,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-04-06 21:19:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 619 transitions. [2018-04-06 21:19:02,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2018-04-06 21:19:02,091 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:02,091 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] [2018-04-06 21:19:02,091 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]=== [2018-04-06 21:19:02,092 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 [2018-04-06 21:19:02,101 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:02,206 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6379 backedges. 3614 proven. 147 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-04-06 21:19:02,657 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6379 backedges. 3614 proven. 147 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2018-04-06 21:19:03,337 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:03,337 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 46 [2018-04-06 21:19:03,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-04-06 21:19:03,338 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-04-06 21:19:03,338 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2018-04-06 21:19:03,339 INFO L87 Difference]: Start difference. First operand 608 states and 619 transitions. Second operand 46 states. [2018-04-06 21:19:04,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:04,046 INFO L93 Difference]: Finished difference Result 810 states and 836 transitions. [2018-04-06 21:19:04,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-04-06 21:19:04,046 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 499 [2018-04-06 21:19:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:04,048 INFO L225 Difference]: With dead ends: 810 [2018-04-06 21:19:04,048 INFO L226 Difference]: Without dead ends: 622 [2018-04-06 21:19:04,049 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 937 SyntacticMatches, 17 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1038, Invalid=5282, Unknown=0, NotChecked=0, Total=6320 [2018-04-06 21:19:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2018-04-06 21:19:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 608. [2018-04-06 21:19:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2018-04-06 21:19:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 617 transitions. [2018-04-06 21:19:04,063 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 617 transitions. Word has length 499 [2018-04-06 21:19:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:04,064 INFO L459 AbstractCegarLoop]: Abstraction has 608 states and 617 transitions. [2018-04-06 21:19:04,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-04-06 21:19:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 617 transitions. [2018-04-06 21:19:04,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-04-06 21:19:04,066 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:04,066 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] [2018-04-06 21:19:04,066 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]=== [2018-04-06 21:19:04,066 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 [2018-04-06 21:19:04,075 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:04,180 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6704 backedges. 1976 proven. 210 refuted. 0 times theorem prover too weak. 4518 trivial. 0 not checked. [2018-04-06 21:19:04,839 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6704 backedges. 1976 proven. 210 refuted. 0 times theorem prover too weak. 4518 trivial. 0 not checked. [2018-04-06 21:19:05,226 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:05,226 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-04-06 21:19:05,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-04-06 21:19:05,227 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-04-06 21:19:05,227 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2018-04-06 21:19:05,227 INFO L87 Difference]: Start difference. First operand 608 states and 617 transitions. Second operand 32 states. [2018-04-06 21:19:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:06,380 INFO L93 Difference]: Finished difference Result 717 states and 789 transitions. [2018-04-06 21:19:06,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-06 21:19:06,380 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 508 [2018-04-06 21:19:06,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:06,384 INFO L225 Difference]: With dead ends: 717 [2018-04-06 21:19:06,384 INFO L226 Difference]: Without dead ends: 716 [2018-04-06 21:19:06,385 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1096, Invalid=3194, Unknown=0, NotChecked=0, Total=4290 [2018-04-06 21:19:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2018-04-06 21:19:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 679. [2018-04-06 21:19:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2018-04-06 21:19:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 703 transitions. [2018-04-06 21:19:06,416 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 703 transitions. Word has length 508 [2018-04-06 21:19:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:06,417 INFO L459 AbstractCegarLoop]: Abstraction has 679 states and 703 transitions. [2018-04-06 21:19:06,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-04-06 21:19:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 703 transitions. [2018-04-06 21:19:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2018-04-06 21:19:06,420 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:06,421 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] [2018-04-06 21:19:06,421 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]=== [2018-04-06 21:19:06,421 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 [2018-04-06 21:19:06,427 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:06,540 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:06,542 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 [2018-04-06 21:19:06,543 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-06 21:19:06,547 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-06 21:19:06,547 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-06 21:19:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6739 backedges. 2044 proven. 233 refuted. 0 times theorem prover too weak. 4462 trivial. 0 not checked. [2018-04-06 21:19:07,445 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6739 backedges. 2044 proven. 233 refuted. 0 times theorem prover too weak. 4462 trivial. 0 not checked. [2018-04-06 21:19:08,110 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:08,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2018-04-06 21:19:08,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-04-06 21:19:08,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-04-06 21:19:08,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2018-04-06 21:19:08,112 INFO L87 Difference]: Start difference. First operand 679 states and 703 transitions. Second operand 41 states. [2018-04-06 21:19:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:10,556 INFO L93 Difference]: Finished difference Result 705 states and 777 transitions. [2018-04-06 21:19:10,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-04-06 21:19:10,556 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 509 [2018-04-06 21:19:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:10,559 INFO L225 Difference]: With dead ends: 705 [2018-04-06 21:19:10,559 INFO L226 Difference]: Without dead ends: 704 [2018-04-06 21:19:10,559 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1063 GetRequests, 964 SyntacticMatches, 15 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1587, Invalid=5723, Unknown=0, NotChecked=0, Total=7310 [2018-04-06 21:19:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2018-04-06 21:19:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 680. [2018-04-06 21:19:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2018-04-06 21:19:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 697 transitions. [2018-04-06 21:19:10,585 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 697 transitions. Word has length 509 [2018-04-06 21:19:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:10,586 INFO L459 AbstractCegarLoop]: Abstraction has 680 states and 697 transitions. [2018-04-06 21:19:10,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-04-06 21:19:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 697 transitions. [2018-04-06 21:19:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2018-04-06 21:19:10,591 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:10,591 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] [2018-04-06 21:19:10,591 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]=== [2018-04-06 21:19:10,591 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 [2018-04-06 21:19:10,603 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:10,748 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9628 backedges. 4954 proven. 348 refuted. 0 times theorem prover too weak. 4326 trivial. 0 not checked. [2018-04-06 21:19:11,362 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9628 backedges. 4954 proven. 348 refuted. 0 times theorem prover too weak. 4326 trivial. 0 not checked. [2018-04-06 21:19:11,945 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:11,945 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 55 [2018-04-06 21:19:11,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-04-06 21:19:11,947 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-04-06 21:19:11,947 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2573, Unknown=0, NotChecked=0, Total=2970 [2018-04-06 21:19:11,947 INFO L87 Difference]: Start difference. First operand 680 states and 697 transitions. Second operand 55 states. [2018-04-06 21:19:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:13,272 INFO L93 Difference]: Finished difference Result 1016 states and 1051 transitions. [2018-04-06 21:19:13,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-04-06 21:19:13,273 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 580 [2018-04-06 21:19:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:13,276 INFO L225 Difference]: With dead ends: 1016 [2018-04-06 21:19:13,276 INFO L226 Difference]: Without dead ends: 773 [2018-04-06 21:19:13,280 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1209 GetRequests, 1087 SyntacticMatches, 19 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1688, Invalid=9232, Unknown=0, NotChecked=0, Total=10920 [2018-04-06 21:19:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2018-04-06 21:19:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 762. [2018-04-06 21:19:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2018-04-06 21:19:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 779 transitions. [2018-04-06 21:19:13,306 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 779 transitions. Word has length 580 [2018-04-06 21:19:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:13,307 INFO L459 AbstractCegarLoop]: Abstraction has 762 states and 779 transitions. [2018-04-06 21:19:13,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-04-06 21:19:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 779 transitions. [2018-04-06 21:19:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2018-04-06 21:19:13,312 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:13,313 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] [2018-04-06 21:19:13,313 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]=== [2018-04-06 21:19:13,313 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 [2018-04-06 21:19:13,322 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:13,436 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12939 backedges. 7600 proven. 203 refuted. 0 times theorem prover too weak. 5136 trivial. 0 not checked. [2018-04-06 21:19:14,057 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12939 backedges. 7600 proven. 203 refuted. 0 times theorem prover too weak. 5136 trivial. 0 not checked. [2018-04-06 21:19:14,697 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:14,697 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 52 [2018-04-06 21:19:14,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-04-06 21:19:14,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-04-06 21:19:14,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2018-04-06 21:19:14,698 INFO L87 Difference]: Start difference. First operand 762 states and 779 transitions. Second operand 52 states. [2018-04-06 21:19:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:15,454 INFO L93 Difference]: Finished difference Result 1021 states and 1058 transitions. [2018-04-06 21:19:15,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-04-06 21:19:15,455 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 664 [2018-04-06 21:19:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:15,458 INFO L225 Difference]: With dead ends: 1021 [2018-04-06 21:19:15,458 INFO L226 Difference]: Without dead ends: 772 [2018-04-06 21:19:15,462 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 1259 SyntacticMatches, 19 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1322, Invalid=6868, Unknown=0, NotChecked=0, Total=8190 [2018-04-06 21:19:15,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2018-04-06 21:19:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 762. [2018-04-06 21:19:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2018-04-06 21:19:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 777 transitions. [2018-04-06 21:19:15,499 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 777 transitions. Word has length 664 [2018-04-06 21:19:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:15,500 INFO L459 AbstractCegarLoop]: Abstraction has 762 states and 777 transitions. [2018-04-06 21:19:15,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-04-06 21:19:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 777 transitions. [2018-04-06 21:19:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2018-04-06 21:19:15,505 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:15,505 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] [2018-04-06 21:19:15,506 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]=== [2018-04-06 21:19:15,506 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 [2018-04-06 21:19:15,514 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:15,664 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13410 backedges. 6150 proven. 441 refuted. 0 times theorem prover too weak. 6819 trivial. 0 not checked. [2018-04-06 21:19:16,273 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13410 backedges. 6150 proven. 441 refuted. 0 times theorem prover too weak. 6819 trivial. 0 not checked. [2018-04-06 21:19:16,963 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:16,963 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 61 [2018-04-06 21:19:16,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-04-06 21:19:16,964 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-04-06 21:19:16,965 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2018-04-06 21:19:16,965 INFO L87 Difference]: Start difference. First operand 762 states and 777 transitions. Second operand 61 states. [2018-04-06 21:19:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:18,409 INFO L93 Difference]: Finished difference Result 1096 states and 1127 transitions. [2018-04-06 21:19:18,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-04-06 21:19:18,447 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 673 [2018-04-06 21:19:18,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:18,449 INFO L225 Difference]: With dead ends: 1096 [2018-04-06 21:19:18,449 INFO L226 Difference]: Without dead ends: 864 [2018-04-06 21:19:18,452 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1401 GetRequests, 1265 SyntacticMatches, 21 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2067, Invalid=11505, Unknown=0, NotChecked=0, Total=13572 [2018-04-06 21:19:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2018-04-06 21:19:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 853. [2018-04-06 21:19:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2018-04-06 21:19:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 868 transitions. [2018-04-06 21:19:18,471 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 868 transitions. Word has length 673 [2018-04-06 21:19:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:18,472 INFO L459 AbstractCegarLoop]: Abstraction has 853 states and 868 transitions. [2018-04-06 21:19:18,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-04-06 21:19:18,472 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 868 transitions. [2018-04-06 21:19:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 767 [2018-04-06 21:19:18,476 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:18,477 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] [2018-04-06 21:19:18,477 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]=== [2018-04-06 21:19:18,477 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 [2018-04-06 21:19:18,483 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:18,612 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17821 backedges. 9867 proven. 268 refuted. 0 times theorem prover too weak. 7686 trivial. 0 not checked. [2018-04-06 21:19:19,228 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17821 backedges. 9867 proven. 268 refuted. 0 times theorem prover too weak. 7686 trivial. 0 not checked. [2018-04-06 21:19:20,031 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:20,032 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 58 [2018-04-06 21:19:20,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-04-06 21:19:20,033 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-04-06 21:19:20,033 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=2850, Unknown=0, NotChecked=0, Total=3306 [2018-04-06 21:19:20,033 INFO L87 Difference]: Start difference. First operand 853 states and 868 transitions. Second operand 58 states. [2018-04-06 21:19:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:21,055 INFO L93 Difference]: Finished difference Result 1101 states and 1133 transitions. [2018-04-06 21:19:21,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-04-06 21:19:21,055 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 766 [2018-04-06 21:19:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:21,057 INFO L225 Difference]: With dead ends: 1101 [2018-04-06 21:19:21,058 INFO L226 Difference]: Without dead ends: 863 [2018-04-06 21:19:21,060 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 [2018-04-06 21:19:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-04-06 21:19:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 853. [2018-04-06 21:19:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2018-04-06 21:19:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 866 transitions. [2018-04-06 21:19:21,078 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 866 transitions. Word has length 766 [2018-04-06 21:19:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:21,079 INFO L459 AbstractCegarLoop]: Abstraction has 853 states and 866 transitions. [2018-04-06 21:19:21,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-04-06 21:19:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 866 transitions. [2018-04-06 21:19:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2018-04-06 21:19:21,083 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:21,083 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] [2018-04-06 21:19:21,083 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]=== [2018-04-06 21:19:21,084 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 [2018-04-06 21:19:21,097 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:21,232 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18375 backedges. 7475 proven. 545 refuted. 0 times theorem prover too weak. 10355 trivial. 0 not checked. [2018-04-06 21:19:21,945 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18375 backedges. 7475 proven. 545 refuted. 0 times theorem prover too weak. 10355 trivial. 0 not checked. [2018-04-06 21:19:22,770 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:22,770 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 67 [2018-04-06 21:19:22,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-06 21:19:22,771 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-06 21:19:22,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2018-04-06 21:19:22,772 INFO L87 Difference]: Start difference. First operand 853 states and 866 transitions. Second operand 67 states. [2018-04-06 21:19:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:24,435 INFO L93 Difference]: Finished difference Result 1185 states and 1212 transitions. [2018-04-06 21:19:24,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-04-06 21:19:24,435 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 775 [2018-04-06 21:19:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:24,438 INFO L225 Difference]: With dead ends: 1185 [2018-04-06 21:19:24,438 INFO L226 Difference]: Without dead ends: 964 [2018-04-06 21:19:24,440 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 [2018-04-06 21:19:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2018-04-06 21:19:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 953. [2018-04-06 21:19:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-04-06 21:19:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 966 transitions. [2018-04-06 21:19:24,458 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 966 transitions. Word has length 775 [2018-04-06 21:19:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:24,458 INFO L459 AbstractCegarLoop]: Abstraction has 953 states and 966 transitions. [2018-04-06 21:19:24,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-06 21:19:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 966 transitions. [2018-04-06 21:19:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2018-04-06 21:19:24,463 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:24,464 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] [2018-04-06 21:19:24,464 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]=== [2018-04-06 21:19:24,464 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 [2018-04-06 21:19:24,471 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:24,614 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24126 backedges. 12514 proven. 342 refuted. 0 times theorem prover too weak. 11270 trivial. 0 not checked. [2018-04-06 21:19:25,358 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24126 backedges. 12514 proven. 342 refuted. 0 times theorem prover too weak. 11270 trivial. 0 not checked. [2018-04-06 21:19:26,322 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:26,322 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 64 [2018-04-06 21:19:26,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-06 21:19:26,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-06 21:19:26,324 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=3486, Unknown=0, NotChecked=0, Total=4032 [2018-04-06 21:19:26,324 INFO L87 Difference]: Start difference. First operand 953 states and 966 transitions. Second operand 64 states. [2018-04-06 21:19:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:27,397 INFO L93 Difference]: Finished difference Result 1190 states and 1217 transitions. [2018-04-06 21:19:27,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-04-06 21:19:27,397 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 877 [2018-04-06 21:19:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:27,400 INFO L225 Difference]: With dead ends: 1190 [2018-04-06 21:19:27,400 INFO L226 Difference]: Without dead ends: 963 [2018-04-06 21:19:27,402 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 [2018-04-06 21:19:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2018-04-06 21:19:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 953. [2018-04-06 21:19:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2018-04-06 21:19:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 964 transitions. [2018-04-06 21:19:27,418 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 964 transitions. Word has length 877 [2018-04-06 21:19:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:27,419 INFO L459 AbstractCegarLoop]: Abstraction has 953 states and 964 transitions. [2018-04-06 21:19:27,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-06 21:19:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 964 transitions. [2018-04-06 21:19:27,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2018-04-06 21:19:27,423 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:27,423 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] [2018-04-06 21:19:27,423 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]=== [2018-04-06 21:19:27,424 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 [2018-04-06 21:19:27,429 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:27,569 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24772 backedges. 8929 proven. 660 refuted. 0 times theorem prover too weak. 15183 trivial. 0 not checked. [2018-04-06 21:19:28,473 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24772 backedges. 8929 proven. 660 refuted. 0 times theorem prover too weak. 15183 trivial. 0 not checked. [2018-04-06 21:19:29,493 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:29,503 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 73 [2018-04-06 21:19:29,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-06 21:19:29,504 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-06 21:19:29,504 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=4583, Unknown=0, NotChecked=0, Total=5256 [2018-04-06 21:19:29,504 INFO L87 Difference]: Start difference. First operand 953 states and 964 transitions. Second operand 73 states. [2018-04-06 21:19:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:31,436 INFO L93 Difference]: Finished difference Result 1283 states and 1306 transitions. [2018-04-06 21:19:31,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-04-06 21:19:31,437 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 886 [2018-04-06 21:19:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:31,439 INFO L225 Difference]: With dead ends: 1283 [2018-04-06 21:19:31,439 INFO L226 Difference]: Without dead ends: 1073 [2018-04-06 21:19:31,441 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 [2018-04-06 21:19:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2018-04-06 21:19:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1062. [2018-04-06 21:19:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2018-04-06 21:19:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1073 transitions. [2018-04-06 21:19:31,460 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1073 transitions. Word has length 886 [2018-04-06 21:19:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:31,460 INFO L459 AbstractCegarLoop]: Abstraction has 1062 states and 1073 transitions. [2018-04-06 21:19:31,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-06 21:19:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1073 transitions. [2018-04-06 21:19:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2018-04-06 21:19:31,466 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:31,466 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] [2018-04-06 21:19:31,466 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]=== [2018-04-06 21:19:31,467 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 [2018-04-06 21:19:31,472 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:31,630 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32130 backedges. 15568 proven. 425 refuted. 0 times theorem prover too weak. 16137 trivial. 0 not checked. [2018-04-06 21:19:32,602 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 32130 backedges. 15568 proven. 425 refuted. 0 times theorem prover too weak. 16137 trivial. 0 not checked. [2018-04-06 21:19:33,757 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:33,757 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 70 [2018-04-06 21:19:33,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-04-06 21:19:33,758 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-04-06 21:19:33,759 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=4186, Unknown=0, NotChecked=0, Total=4830 [2018-04-06 21:19:33,759 INFO L87 Difference]: Start difference. First operand 1062 states and 1073 transitions. Second operand 70 states. [2018-04-06 21:19:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:34,869 INFO L93 Difference]: Finished difference Result 1288 states and 1310 transitions. [2018-04-06 21:19:34,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-04-06 21:19:34,869 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 997 [2018-04-06 21:19:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:34,872 INFO L225 Difference]: With dead ends: 1288 [2018-04-06 21:19:34,872 INFO L226 Difference]: Without dead ends: 1072 [2018-04-06 21:19:34,873 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2048 GetRequests, 1901 SyntacticMatches, 25 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5824 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2378, Invalid=12874, Unknown=0, NotChecked=0, Total=15252 [2018-04-06 21:19:34,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2018-04-06 21:19:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1062. [2018-04-06 21:19:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2018-04-06 21:19:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1071 transitions. [2018-04-06 21:19:34,893 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1071 transitions. Word has length 997 [2018-04-06 21:19:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:34,894 INFO L459 AbstractCegarLoop]: Abstraction has 1062 states and 1071 transitions. [2018-04-06 21:19:34,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-04-06 21:19:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1071 transitions. [2018-04-06 21:19:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2018-04-06 21:19:34,901 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:34,901 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] [2018-04-06 21:19:34,901 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]=== [2018-04-06 21:19:34,902 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 [2018-04-06 21:19:34,909 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:35,077 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 32877 backedges. 10512 proven. 786 refuted. 0 times theorem prover too weak. 21579 trivial. 0 not checked. [2018-04-06 21:19:36,112 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 32877 backedges. 10512 proven. 786 refuted. 0 times theorem prover too weak. 21579 trivial. 0 not checked. [2018-04-06 21:19:37,296 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:37,297 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 79 [2018-04-06 21:19:37,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-04-06 21:19:37,298 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-04-06 21:19:37,298 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=5381, Unknown=0, NotChecked=0, Total=6162 [2018-04-06 21:19:37,298 INFO L87 Difference]: Start difference. First operand 1062 states and 1071 transitions. Second operand 79 states. [2018-04-06 21:19:39,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:39,436 INFO L93 Difference]: Finished difference Result 1390 states and 1409 transitions. [2018-04-06 21:19:39,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-04-06 21:19:39,436 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 1006 [2018-04-06 21:19:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:39,439 INFO L225 Difference]: With dead ends: 1390 [2018-04-06 21:19:39,439 INFO L226 Difference]: Without dead ends: 1191 [2018-04-06 21:19:39,440 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2085 GetRequests, 1907 SyntacticMatches, 27 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6243 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3432, Invalid=19824, Unknown=0, NotChecked=0, Total=23256 [2018-04-06 21:19:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2018-04-06 21:19:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1180. [2018-04-06 21:19:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-04-06 21:19:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1189 transitions. [2018-04-06 21:19:39,461 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1189 transitions. Word has length 1006 [2018-04-06 21:19:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:39,462 INFO L459 AbstractCegarLoop]: Abstraction has 1180 states and 1189 transitions. [2018-04-06 21:19:39,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-04-06 21:19:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1189 transitions. [2018-04-06 21:19:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1127 [2018-04-06 21:19:39,473 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:39,474 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] [2018-04-06 21:19:39,474 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]=== [2018-04-06 21:19:39,475 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 [2018-04-06 21:19:39,484 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:39,667 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 42136 backedges. 19056 proven. 517 refuted. 0 times theorem prover too weak. 22563 trivial. 0 not checked. [2018-04-06 21:19:40,765 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 42136 backedges. 19056 proven. 517 refuted. 0 times theorem prover too weak. 22563 trivial. 0 not checked. [2018-04-06 21:19:42,271 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:42,271 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 76 [2018-04-06 21:19:42,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-04-06 21:19:42,272 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-04-06 21:19:42,273 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=4950, Unknown=0, NotChecked=0, Total=5700 [2018-04-06 21:19:42,273 INFO L87 Difference]: Start difference. First operand 1180 states and 1189 transitions. Second operand 76 states. [2018-04-06 21:19:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:43,624 INFO L93 Difference]: Finished difference Result 1395 states and 1412 transitions. [2018-04-06 21:19:43,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-04-06 21:19:43,625 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 1126 [2018-04-06 21:19:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:43,628 INFO L225 Difference]: With dead ends: 1395 [2018-04-06 21:19:43,628 INFO L226 Difference]: Without dead ends: 1190 [2018-04-06 21:19:43,629 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2311 GetRequests, 2151 SyntacticMatches, 27 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2798, Invalid=15292, Unknown=0, NotChecked=0, Total=18090 [2018-04-06 21:19:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2018-04-06 21:19:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1180. [2018-04-06 21:19:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1180 states. [2018-04-06 21:19:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1187 transitions. [2018-04-06 21:19:43,651 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1187 transitions. Word has length 1126 [2018-04-06 21:19:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:43,652 INFO L459 AbstractCegarLoop]: Abstraction has 1180 states and 1187 transitions. [2018-04-06 21:19:43,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-04-06 21:19:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1187 transitions. [2018-04-06 21:19:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2018-04-06 21:19:43,664 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:43,664 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] [2018-04-06 21:19:43,664 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]=== [2018-04-06 21:19:43,665 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 [2018-04-06 21:19:43,670 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:43,858 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42993 backedges. 12224 proven. 923 refuted. 0 times theorem prover too weak. 29846 trivial. 0 not checked. [2018-04-06 21:19:45,262 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42993 backedges. 12224 proven. 923 refuted. 0 times theorem prover too weak. 29846 trivial. 0 not checked. [2018-04-06 21:19:46,664 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:46,664 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 85 [2018-04-06 21:19:46,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-04-06 21:19:46,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-04-06 21:19:46,666 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=6243, Unknown=0, NotChecked=0, Total=7140 [2018-04-06 21:19:46,666 INFO L87 Difference]: Start difference. First operand 1180 states and 1187 transitions. Second operand 85 states. [2018-04-06 21:19:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:49,306 INFO L93 Difference]: Finished difference Result 1506 states and 1521 transitions. [2018-04-06 21:19:49,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-04-06 21:19:49,306 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 1135 [2018-04-06 21:19:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:49,310 INFO L225 Difference]: With dead ends: 1506 [2018-04-06 21:19:49,310 INFO L226 Difference]: Without dead ends: 1318 [2018-04-06 21:19:49,311 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2349 GetRequests, 2157 SyntacticMatches, 29 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7316 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3963, Invalid=23097, Unknown=0, NotChecked=0, Total=27060 [2018-04-06 21:19:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2018-04-06 21:19:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1307. [2018-04-06 21:19:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2018-04-06 21:19:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1314 transitions. [2018-04-06 21:19:49,333 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1314 transitions. Word has length 1135 [2018-04-06 21:19:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:49,334 INFO L459 AbstractCegarLoop]: Abstraction has 1307 states and 1314 transitions. [2018-04-06 21:19:49,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-04-06 21:19:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1314 transitions. [2018-04-06 21:19:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1257 [2018-04-06 21:19:49,342 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:49,342 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] [2018-04-06 21:19:49,342 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]=== [2018-04-06 21:19:49,343 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 [2018-04-06 21:19:49,348 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:49,547 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 51654 backedges. 20549 proven. 618 refuted. 0 times theorem prover too weak. 30487 trivial. 0 not checked. [2018-04-06 21:19:50,861 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 51654 backedges. 10173 proven. 1970 refuted. 0 times theorem prover too weak. 39511 trivial. 0 not checked. [2018-04-06 21:19:52,416 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:52,426 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 82 [2018-04-06 21:19:52,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-04-06 21:19:52,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-04-06 21:19:52,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=5778, Unknown=0, NotChecked=0, Total=6642 [2018-04-06 21:19:52,427 INFO L87 Difference]: Start difference. First operand 1307 states and 1314 transitions. Second operand 82 states. [2018-04-06 21:19:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:19:53,827 INFO L93 Difference]: Finished difference Result 1511 states and 1523 transitions. [2018-04-06 21:19:53,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-04-06 21:19:53,827 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 1256 [2018-04-06 21:19:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:19:53,830 INFO L225 Difference]: With dead ends: 1511 [2018-04-06 21:19:53,831 INFO L226 Difference]: Without dead ends: 1317 [2018-04-06 21:19:53,832 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 [2018-04-06 21:19:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2018-04-06 21:19:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1307. [2018-04-06 21:19:53,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2018-04-06 21:19:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 1312 transitions. [2018-04-06 21:19:53,854 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 1312 transitions. Word has length 1256 [2018-04-06 21:19:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:19:53,855 INFO L459 AbstractCegarLoop]: Abstraction has 1307 states and 1312 transitions. [2018-04-06 21:19:53,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-04-06 21:19:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 1312 transitions. [2018-04-06 21:19:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1274 [2018-04-06 21:19:53,863 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:19:53,864 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] [2018-04-06 21:19:53,864 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]=== [2018-04-06 21:19:53,864 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 [2018-04-06 21:19:53,869 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:19:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:19:54,093 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:19:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55450 backedges. 14065 proven. 1071 refuted. 0 times theorem prover too weak. 40314 trivial. 0 not checked. [2018-04-06 21:19:55,526 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:19:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 55450 backedges. 14065 proven. 1071 refuted. 0 times theorem prover too weak. 40314 trivial. 0 not checked. [2018-04-06 21:19:57,226 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:19:57,227 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 91 [2018-04-06 21:19:57,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-04-06 21:19:57,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-04-06 21:19:57,229 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=7169, Unknown=0, NotChecked=0, Total=8190 [2018-04-06 21:19:57,229 INFO L87 Difference]: Start difference. First operand 1307 states and 1312 transitions. Second operand 91 states. [2018-04-06 21:20:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:20:00,593 INFO L93 Difference]: Finished difference Result 1642 states and 1655 transitions. [2018-04-06 21:20:00,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-04-06 21:20:00,593 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 1273 [2018-04-06 21:20:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:20:00,597 INFO L225 Difference]: With dead ends: 1642 [2018-04-06 21:20:00,597 INFO L226 Difference]: Without dead ends: 1462 [2018-04-06 21:20:00,599 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2631 GetRequests, 2425 SyntacticMatches, 31 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8474 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4532, Invalid=26620, Unknown=0, NotChecked=0, Total=31152 [2018-04-06 21:20:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2018-04-06 21:20:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1446. [2018-04-06 21:20:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1446 states. [2018-04-06 21:20:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 1452 transitions. [2018-04-06 21:20:00,624 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 1452 transitions. Word has length 1273 [2018-04-06 21:20:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:20:00,625 INFO L459 AbstractCegarLoop]: Abstraction has 1446 states and 1452 transitions. [2018-04-06 21:20:00,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-04-06 21:20:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 1452 transitions. [2018-04-06 21:20:00,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2018-04-06 21:20:00,633 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:20:00,633 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] [2018-04-06 21:20:00,633 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]=== [2018-04-06 21:20:00,634 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 [2018-04-06 21:20:00,639 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:20:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:20:00,839 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:20:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 53559 backedges. 12490 proven. 728 refuted. 0 times theorem prover too weak. 40341 trivial. 0 not checked. [2018-04-06 21:20:02,290 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:20:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 53559 backedges. 12490 proven. 728 refuted. 0 times theorem prover too weak. 40341 trivial. 0 not checked. [2018-04-06 21:20:04,156 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:20:04,171 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 88 [2018-04-06 21:20:04,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-04-06 21:20:04,172 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-04-06 21:20:04,173 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=986, Invalid=6670, Unknown=0, NotChecked=0, Total=7656 [2018-04-06 21:20:04,173 INFO L87 Difference]: Start difference. First operand 1446 states and 1452 transitions. Second operand 88 states. [2018-04-06 21:20:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:20:05,673 INFO L93 Difference]: Finished difference Result 1642 states and 1652 transitions. [2018-04-06 21:20:05,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-04-06 21:20:05,673 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 1274 [2018-04-06 21:20:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:20:05,677 INFO L225 Difference]: With dead ends: 1642 [2018-04-06 21:20:05,677 INFO L226 Difference]: Without dead ends: 1456 [2018-04-06 21:20:05,679 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2617 GetRequests, 2431 SyntacticMatches, 31 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9574 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3740, Invalid=20752, Unknown=0, NotChecked=0, Total=24492 [2018-04-06 21:20:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2018-04-06 21:20:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1446. [2018-04-06 21:20:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1446 states. [2018-04-06 21:20:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 1450 transitions. [2018-04-06 21:20:05,704 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 1450 transitions. Word has length 1274 [2018-04-06 21:20:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:20:05,705 INFO L459 AbstractCegarLoop]: Abstraction has 1446 states and 1450 transitions. [2018-04-06 21:20:05,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-04-06 21:20:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 1450 transitions. [2018-04-06 21:20:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1284 [2018-04-06 21:20:05,713 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:20:05,714 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] [2018-04-06 21:20:05,714 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]=== [2018-04-06 21:20:05,714 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 [2018-04-06 21:20:05,719 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:20:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:20:05,935 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:20:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 54525 backedges. 0 proven. 1185 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-04-06 21:20:06,742 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:20:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 54525 backedges. 0 proven. 1185 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-04-06 21:20:07,892 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:20:07,893 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-04-06 21:20:07,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-06 21:20:07,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-06 21:20:07,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2018-04-06 21:20:07,895 INFO L87 Difference]: Start difference. First operand 1446 states and 1450 transitions. Second operand 64 states. [2018-04-06 21:20:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:20:09,194 INFO L93 Difference]: Finished difference Result 1649 states and 1684 transitions. [2018-04-06 21:20:09,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-04-06 21:20:09,227 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 1283 [2018-04-06 21:20:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:20:09,231 INFO L225 Difference]: With dead ends: 1649 [2018-04-06 21:20:09,231 INFO L226 Difference]: Without dead ends: 1629 [2018-04-06 21:20:09,232 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2625 GetRequests, 2503 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4867, Invalid=10385, Unknown=0, NotChecked=0, Total=15252 [2018-04-06 21:20:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2018-04-06 21:20:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1619. [2018-04-06 21:20:09,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2018-04-06 21:20:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1638 transitions. [2018-04-06 21:20:09,262 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1638 transitions. Word has length 1283 [2018-04-06 21:20:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:20:09,262 INFO L459 AbstractCegarLoop]: Abstraction has 1619 states and 1638 transitions. [2018-04-06 21:20:09,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-06 21:20:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1638 transitions. [2018-04-06 21:20:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1421 [2018-04-06 21:20:09,272 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:20:09,273 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] [2018-04-06 21:20:09,273 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]=== [2018-04-06 21:20:09,273 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 [2018-04-06 21:20:09,279 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:20:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:20:09,502 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:20:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 70605 backedges. 16035 proven. 1230 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-04-06 21:20:11,216 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:20:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 70605 backedges. 16035 proven. 1230 refuted. 0 times theorem prover too weak. 53340 trivial. 0 not checked. [2018-04-06 21:20:13,130 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:20:13,130 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 97 [2018-04-06 21:20:13,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-04-06 21:20:13,132 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-04-06 21:20:13,132 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=8159, Unknown=0, NotChecked=0, Total=9312 [2018-04-06 21:20:13,132 INFO L87 Difference]: Start difference. First operand 1619 states and 1638 transitions. Second operand 97 states. [2018-04-06 21:20:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:20:16,372 INFO L93 Difference]: Finished difference Result 2117 states and 2156 transitions. [2018-04-06 21:20:16,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-04-06 21:20:16,372 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 1420 [2018-04-06 21:20:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:20:16,377 INFO L225 Difference]: With dead ends: 2117 [2018-04-06 21:20:16,377 INFO L226 Difference]: Without dead ends: 1775 [2018-04-06 21:20:16,380 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2931 GetRequests, 2711 SyntacticMatches, 33 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9717 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5139, Invalid=30393, Unknown=0, NotChecked=0, Total=35532 [2018-04-06 21:20:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2018-04-06 21:20:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1764. [2018-04-06 21:20:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2018-04-06 21:20:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1783 transitions. [2018-04-06 21:20:16,412 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1783 transitions. Word has length 1420 [2018-04-06 21:20:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:20:16,413 INFO L459 AbstractCegarLoop]: Abstraction has 1764 states and 1783 transitions. [2018-04-06 21:20:16,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-04-06 21:20:16,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1783 transitions. [2018-04-06 21:20:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1568 [2018-04-06 21:20:16,426 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:20:16,426 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] [2018-04-06 21:20:16,427 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]=== [2018-04-06 21:20:16,427 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 [2018-04-06 21:20:16,434 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:20:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:20:16,694 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:20:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 87601 backedges. 32394 proven. 847 refuted. 0 times theorem prover too weak. 54360 trivial. 0 not checked. [2018-04-06 21:20:18,501 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:20:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 87601 backedges. 32394 proven. 847 refuted. 0 times theorem prover too weak. 54360 trivial. 0 not checked. [2018-04-06 21:20:20,650 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:20:20,650 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 94 [2018-04-06 21:20:20,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-04-06 21:20:20,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-04-06 21:20:20,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=7626, Unknown=0, NotChecked=0, Total=8742 [2018-04-06 21:20:20,652 INFO L87 Difference]: Start difference. First operand 1764 states and 1783 transitions. Second operand 94 states. [2018-04-06 21:20:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:20:22,552 INFO L93 Difference]: Finished difference Result 2126 states and 2176 transitions. [2018-04-06 21:20:22,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-04-06 21:20:22,552 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 1567 [2018-04-06 21:20:22,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:20:22,556 INFO L225 Difference]: With dead ends: 2126 [2018-04-06 21:20:22,557 INFO L226 Difference]: Without dead ends: 1778 [2018-04-06 21:20:22,560 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 [2018-04-06 21:20:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2018-04-06 21:20:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1764. [2018-04-06 21:20:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1764 states. [2018-04-06 21:20:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 1781 transitions. [2018-04-06 21:20:22,594 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 1781 transitions. Word has length 1567 [2018-04-06 21:20:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:20:22,595 INFO L459 AbstractCegarLoop]: Abstraction has 1764 states and 1781 transitions. [2018-04-06 21:20:22,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-04-06 21:20:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 1781 transitions. [2018-04-06 21:20:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1577 [2018-04-06 21:20:22,607 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:20:22,608 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] [2018-04-06 21:20:22,608 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]=== [2018-04-06 21:20:22,608 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 [2018-04-06 21:20:22,614 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:20:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:20:22,871 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:20:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 88842 backedges. 17072 proven. 990 refuted. 0 times theorem prover too weak. 70780 trivial. 0 not checked. [2018-04-06 21:20:23,936 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:20:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 88842 backedges. 17072 proven. 990 refuted. 0 times theorem prover too weak. 70780 trivial. 0 not checked. [2018-04-06 21:20:25,758 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:20:25,761 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-04-06 21:20:25,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-06 21:20:25,762 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-06 21:20:25,762 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2018-04-06 21:20:25,762 INFO L87 Difference]: Start difference. First operand 1764 states and 1781 transitions. Second operand 64 states. [2018-04-06 21:20:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:20:31,267 INFO L93 Difference]: Finished difference Result 1977 states and 2249 transitions. [2018-04-06 21:20:31,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-04-06 21:20:31,304 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 1576 [2018-04-06 21:20:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:20:31,312 INFO L225 Difference]: With dead ends: 1977 [2018-04-06 21:20:31,312 INFO L226 Difference]: Without dead ends: 1976 [2018-04-06 21:20:31,315 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3239 GetRequests, 3103 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3452 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4624, Invalid=14282, Unknown=0, NotChecked=0, Total=18906 [2018-04-06 21:20:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2018-04-06 21:20:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1907. [2018-04-06 21:20:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1907 states. [2018-04-06 21:20:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 1955 transitions. [2018-04-06 21:20:31,385 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 1955 transitions. Word has length 1576 [2018-04-06 21:20:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:20:31,387 INFO L459 AbstractCegarLoop]: Abstraction has 1907 states and 1955 transitions. [2018-04-06 21:20:31,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-06 21:20:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 1955 transitions. [2018-04-06 21:20:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2018-04-06 21:20:31,408 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:20:31,409 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] [2018-04-06 21:20:31,409 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]=== [2018-04-06 21:20:31,410 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 [2018-04-06 21:20:31,420 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:20:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:20:31,737 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:20:31,740 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 [2018-04-06 21:20:31,740 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-06 21:20:31,744 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-06 21:20:31,744 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-06 21:20:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 88977 backedges. 17272 proven. 1037 refuted. 0 times theorem prover too weak. 70668 trivial. 0 not checked. [2018-04-06 21:20:35,932 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:20:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 88977 backedges. 17272 proven. 1037 refuted. 0 times theorem prover too weak. 70668 trivial. 0 not checked. [2018-04-06 21:20:38,683 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:20:38,684 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 72 [2018-04-06 21:20:38,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-06 21:20:38,685 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-06 21:20:38,685 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=4531, Unknown=0, NotChecked=0, Total=5256 [2018-04-06 21:20:38,686 INFO L87 Difference]: Start difference. First operand 1907 states and 1955 transitions. Second operand 73 states. [2018-04-06 21:20:42,062 WARN L151 SmtUtils]: Spent 101ms on a formula simplification. DAG size of input: 124 DAG size of output 27 [2018-04-06 21:20:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:20:48,006 INFO L93 Difference]: Finished difference Result 1957 states and 2229 transitions. [2018-04-06 21:20:48,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-04-06 21:20:48,007 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 1577 [2018-04-06 21:20:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:20:48,013 INFO L225 Difference]: With dead ends: 1957 [2018-04-06 21:20:48,013 INFO L226 Difference]: Without dead ends: 1956 [2018-04-06 21:20:48,014 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3247 GetRequests, 3052 SyntacticMatches, 31 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6177 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=5731, Invalid=21659, Unknown=0, NotChecked=0, Total=27390 [2018-04-06 21:20:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2018-04-06 21:20:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1908. [2018-04-06 21:20:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1908 states. [2018-04-06 21:20:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 1941 transitions. [2018-04-06 21:20:48,079 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 1941 transitions. Word has length 1577 [2018-04-06 21:20:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:20:48,081 INFO L459 AbstractCegarLoop]: Abstraction has 1908 states and 1941 transitions. [2018-04-06 21:20:48,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-06 21:20:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 1941 transitions. [2018-04-06 21:20:48,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1721 [2018-04-06 21:20:48,101 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:20:48,102 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] [2018-04-06 21:20:48,102 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]=== [2018-04-06 21:20:48,102 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 [2018-04-06 21:20:48,108 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:20:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:20:48,388 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:20:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 109922 backedges. 38262 proven. 1400 refuted. 0 times theorem prover too weak. 70260 trivial. 0 not checked. [2018-04-06 21:20:50,506 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:20:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 109922 backedges. 38262 proven. 1400 refuted. 0 times theorem prover too weak. 70260 trivial. 0 not checked. [2018-04-06 21:20:52,816 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:20:52,817 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 103 [2018-04-06 21:20:52,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-04-06 21:20:52,818 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-04-06 21:20:52,819 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=9213, Unknown=0, NotChecked=0, Total=10506 [2018-04-06 21:20:52,819 INFO L87 Difference]: Start difference. First operand 1908 states and 1941 transitions. Second operand 103 states. [2018-04-06 21:20:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:20:56,357 INFO L93 Difference]: Finished difference Result 2548 states and 2615 transitions. [2018-04-06 21:20:56,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-04-06 21:20:56,357 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 1720 [2018-04-06 21:20:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:20:56,362 INFO L225 Difference]: With dead ends: 2548 [2018-04-06 21:20:56,363 INFO L226 Difference]: Without dead ends: 2073 [2018-04-06 21:20:56,368 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 [2018-04-06 21:20:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2018-04-06 21:20:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2062. [2018-04-06 21:20:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2018-04-06 21:20:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2095 transitions. [2018-04-06 21:20:56,407 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2095 transitions. Word has length 1720 [2018-04-06 21:20:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:20:56,408 INFO L459 AbstractCegarLoop]: Abstraction has 2062 states and 2095 transitions. [2018-04-06 21:20:56,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-04-06 21:20:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2095 transitions. [2018-04-06 21:20:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1877 [2018-04-06 21:20:56,425 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:20:56,426 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] [2018-04-06 21:20:56,426 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]=== [2018-04-06 21:20:56,426 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 [2018-04-06 21:20:56,432 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:20:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:20:56,772 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:20:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 132457 backedges. 57872 proven. 975 refuted. 0 times theorem prover too weak. 73610 trivial. 0 not checked. [2018-04-06 21:20:59,070 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:21:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 132457 backedges. 57872 proven. 975 refuted. 0 times theorem prover too weak. 73610 trivial. 0 not checked. [2018-04-06 21:21:01,623 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:21:01,640 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 100 [2018-04-06 21:21:01,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-04-06 21:21:01,642 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-04-06 21:21:01,642 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1254, Invalid=8646, Unknown=0, NotChecked=0, Total=9900 [2018-04-06 21:21:01,642 INFO L87 Difference]: Start difference. First operand 2062 states and 2095 transitions. Second operand 100 states. [2018-04-06 21:21:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:21:03,704 INFO L93 Difference]: Finished difference Result 2553 states and 2630 transitions. [2018-04-06 21:21:03,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-04-06 21:21:03,705 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 1876 [2018-04-06 21:21:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:21:03,709 INFO L225 Difference]: With dead ends: 2553 [2018-04-06 21:21:03,710 INFO L226 Difference]: Without dead ends: 2072 [2018-04-06 21:21:03,714 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 [2018-04-06 21:21:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2018-04-06 21:21:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2062. [2018-04-06 21:21:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2018-04-06 21:21:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2093 transitions. [2018-04-06 21:21:03,752 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2093 transitions. Word has length 1876 [2018-04-06 21:21:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:21:03,753 INFO L459 AbstractCegarLoop]: Abstraction has 2062 states and 2093 transitions. [2018-04-06 21:21:03,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-04-06 21:21:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2093 transitions. [2018-04-06 21:21:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1886 [2018-04-06 21:21:03,771 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:21:03,771 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] [2018-04-06 21:21:03,772 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]=== [2018-04-06 21:21:03,772 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 [2018-04-06 21:21:03,778 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:21:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:21:04,088 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:21:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 133988 backedges. 42970 proven. 1581 refuted. 0 times theorem prover too weak. 89437 trivial. 0 not checked. [2018-04-06 21:21:06,528 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:21:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 133988 backedges. 42970 proven. 1581 refuted. 0 times theorem prover too weak. 89437 trivial. 0 not checked. [2018-04-06 21:21:09,171 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:21:09,172 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 109 [2018-04-06 21:21:09,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-04-06 21:21:09,173 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-04-06 21:21:09,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1441, Invalid=10331, Unknown=0, NotChecked=0, Total=11772 [2018-04-06 21:21:09,174 INFO L87 Difference]: Start difference. First operand 2062 states and 2093 transitions. Second operand 109 states. [2018-04-06 21:21:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:21:13,309 INFO L93 Difference]: Finished difference Result 2700 states and 2763 transitions. [2018-04-06 21:21:13,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-04-06 21:21:13,341 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 1885 [2018-04-06 21:21:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:21:13,345 INFO L225 Difference]: With dead ends: 2700 [2018-04-06 21:21:13,345 INFO L226 Difference]: Without dead ends: 2236 [2018-04-06 21:21:13,350 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 [2018-04-06 21:21:13,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2018-04-06 21:21:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2225. [2018-04-06 21:21:13,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2225 states. [2018-04-06 21:21:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2256 transitions. [2018-04-06 21:21:13,391 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2256 transitions. Word has length 1885 [2018-04-06 21:21:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:21:13,392 INFO L459 AbstractCegarLoop]: Abstraction has 2225 states and 2256 transitions. [2018-04-06 21:21:13,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-04-06 21:21:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2256 transitions. [2018-04-06 21:21:13,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2051 [2018-04-06 21:21:13,412 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:21:13,413 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] [2018-04-06 21:21:13,413 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]=== [2018-04-06 21:21:13,413 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 [2018-04-06 21:21:13,421 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:21:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:21:13,757 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:21:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 160443 backedges. 66415 proven. 1112 refuted. 0 times theorem prover too weak. 92916 trivial. 0 not checked. [2018-04-06 21:21:16,354 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:21:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 160443 backedges. 66415 proven. 1112 refuted. 0 times theorem prover too weak. 92916 trivial. 0 not checked. [2018-04-06 21:21:19,352 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:21:19,363 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 106 [2018-04-06 21:21:19,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-04-06 21:21:19,365 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-04-06 21:21:19,365 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1400, Invalid=9730, Unknown=0, NotChecked=0, Total=11130 [2018-04-06 21:21:19,365 INFO L87 Difference]: Start difference. First operand 2225 states and 2256 transitions. Second operand 106 states. [2018-04-06 21:21:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:21:21,420 INFO L93 Difference]: Finished difference Result 2705 states and 2777 transitions. [2018-04-06 21:21:21,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-04-06 21:21:21,420 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 2050 [2018-04-06 21:21:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:21:21,424 INFO L225 Difference]: With dead ends: 2705 [2018-04-06 21:21:21,425 INFO L226 Difference]: Without dead ends: 2235 [2018-04-06 21:21:21,431 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 [2018-04-06 21:21:21,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2018-04-06 21:21:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2225. [2018-04-06 21:21:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2225 states. [2018-04-06 21:21:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2254 transitions. [2018-04-06 21:21:21,479 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2254 transitions. Word has length 2050 [2018-04-06 21:21:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:21:21,480 INFO L459 AbstractCegarLoop]: Abstraction has 2225 states and 2254 transitions. [2018-04-06 21:21:21,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-04-06 21:21:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2254 transitions. [2018-04-06 21:21:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2060 [2018-04-06 21:21:21,502 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:21:21,502 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] [2018-04-06 21:21:21,502 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]=== [2018-04-06 21:21:21,503 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 [2018-04-06 21:21:21,511 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:21:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:21:21,864 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:21:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 162129 backedges. 47951 proven. 1773 refuted. 0 times theorem prover too weak. 112405 trivial. 0 not checked. [2018-04-06 21:21:24,613 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:21:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 162129 backedges. 47951 proven. 1773 refuted. 0 times theorem prover too weak. 112405 trivial. 0 not checked. [2018-04-06 21:21:27,621 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:21:27,622 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 115 [2018-04-06 21:21:27,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-04-06 21:21:27,623 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-04-06 21:21:27,624 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1597, Invalid=11513, Unknown=0, NotChecked=0, Total=13110 [2018-04-06 21:21:27,624 INFO L87 Difference]: Start difference. First operand 2225 states and 2254 transitions. Second operand 115 states. [2018-04-06 21:21:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:21:32,102 INFO L93 Difference]: Finished difference Result 2861 states and 2920 transitions. [2018-04-06 21:21:32,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-04-06 21:21:32,102 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 2059 [2018-04-06 21:21:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:21:32,107 INFO L225 Difference]: With dead ends: 2861 [2018-04-06 21:21:32,107 INFO L226 Difference]: Without dead ends: 2408 [2018-04-06 21:21:32,112 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4227 GetRequests, 3965 SyntacticMatches, 39 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13956 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7188, Invalid=43212, Unknown=0, NotChecked=0, Total=50400 [2018-04-06 21:21:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2018-04-06 21:21:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2397. [2018-04-06 21:21:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2397 states. [2018-04-06 21:21:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 2426 transitions. [2018-04-06 21:21:32,180 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 2426 transitions. Word has length 2059 [2018-04-06 21:21:32,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:21:32,182 INFO L459 AbstractCegarLoop]: Abstraction has 2397 states and 2426 transitions. [2018-04-06 21:21:32,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-04-06 21:21:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 2426 transitions. [2018-04-06 21:21:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2234 [2018-04-06 21:21:32,220 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:21:32,221 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] [2018-04-06 21:21:32,221 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]=== [2018-04-06 21:21:32,221 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 [2018-04-06 21:21:32,234 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:21:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:21:32,620 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:21:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 192960 backedges. 75698 proven. 1258 refuted. 0 times theorem prover too weak. 116004 trivial. 0 not checked. [2018-04-06 21:21:35,574 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:21:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 192960 backedges. 75698 proven. 1258 refuted. 0 times theorem prover too weak. 116004 trivial. 0 not checked. [2018-04-06 21:21:39,003 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:21:39,004 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 112 [2018-04-06 21:21:39,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-04-06 21:21:39,006 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-04-06 21:21:39,006 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1554, Invalid=10878, Unknown=0, NotChecked=0, Total=12432 [2018-04-06 21:21:39,006 INFO L87 Difference]: Start difference. First operand 2397 states and 2426 transitions. Second operand 112 states. [2018-04-06 21:21:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:21:41,419 INFO L93 Difference]: Finished difference Result 2866 states and 2933 transitions. [2018-04-06 21:21:41,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-04-06 21:21:41,453 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 2233 [2018-04-06 21:21:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:21:41,458 INFO L225 Difference]: With dead ends: 2866 [2018-04-06 21:21:41,459 INFO L226 Difference]: Without dead ends: 2407 [2018-04-06 21:21:41,464 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 [2018-04-06 21:21:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2018-04-06 21:21:41,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2397. [2018-04-06 21:21:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2397 states. [2018-04-06 21:21:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 2424 transitions. [2018-04-06 21:21:41,509 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 2424 transitions. Word has length 2233 [2018-04-06 21:21:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:21:41,510 INFO L459 AbstractCegarLoop]: Abstraction has 2397 states and 2424 transitions. [2018-04-06 21:21:41,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-04-06 21:21:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 2424 transitions. [2018-04-06 21:21:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2243 [2018-04-06 21:21:41,535 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:21:41,535 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] [2018-04-06 21:21:41,535 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]=== [2018-04-06 21:21:41,536 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 [2018-04-06 21:21:41,544 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:21:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:21:41,921 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:21:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 194810 backedges. 53205 proven. 1976 refuted. 0 times theorem prover too weak. 139629 trivial. 0 not checked. [2018-04-06 21:21:45,074 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:21:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 194810 backedges. 53205 proven. 1976 refuted. 0 times theorem prover too weak. 139629 trivial. 0 not checked. [2018-04-06 21:21:48,494 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:21:48,494 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 121 [2018-04-06 21:21:48,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-04-06 21:21:48,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-04-06 21:21:48,496 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1761, Invalid=12759, Unknown=0, NotChecked=0, Total=14520 [2018-04-06 21:21:48,497 INFO L87 Difference]: Start difference. First operand 2397 states and 2424 transitions. Second operand 121 states. [2018-04-06 21:21:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:21:53,278 INFO L93 Difference]: Finished difference Result 3031 states and 3086 transitions. [2018-04-06 21:21:53,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-04-06 21:21:53,278 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 2242 [2018-04-06 21:21:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:21:53,282 INFO L225 Difference]: With dead ends: 3031 [2018-04-06 21:21:53,282 INFO L226 Difference]: Without dead ends: 2589 [2018-04-06 21:21:53,288 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4599 GetRequests, 4323 SyntacticMatches, 41 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15539 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=7947, Invalid=47985, Unknown=0, NotChecked=0, Total=55932 [2018-04-06 21:21:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2018-04-06 21:21:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2578. [2018-04-06 21:21:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2578 states. [2018-04-06 21:21:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 2605 transitions. [2018-04-06 21:21:53,333 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 2605 transitions. Word has length 2242 [2018-04-06 21:21:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:21:53,335 INFO L459 AbstractCegarLoop]: Abstraction has 2578 states and 2605 transitions. [2018-04-06 21:21:53,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-04-06 21:21:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 2605 transitions. [2018-04-06 21:21:53,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2426 [2018-04-06 21:21:53,362 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:21:53,363 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] [2018-04-06 21:21:53,363 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]=== [2018-04-06 21:21:53,363 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 [2018-04-06 21:21:53,370 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:21:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:21:53,781 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:21:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 230500 backedges. 85748 proven. 1413 refuted. 0 times theorem prover too weak. 143339 trivial. 0 not checked. [2018-04-06 21:21:57,199 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:22:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 230500 backedges. 85748 proven. 1413 refuted. 0 times theorem prover too weak. 143339 trivial. 0 not checked. [2018-04-06 21:22:01,042 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:22:01,042 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 118 [2018-04-06 21:22:01,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-04-06 21:22:01,044 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-04-06 21:22:01,044 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=12090, Unknown=0, NotChecked=0, Total=13806 [2018-04-06 21:22:01,045 INFO L87 Difference]: Start difference. First operand 2578 states and 2605 transitions. Second operand 118 states. [2018-04-06 21:22:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:22:03,795 INFO L93 Difference]: Finished difference Result 3036 states and 3098 transitions. [2018-04-06 21:22:03,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-04-06 21:22:03,796 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 2425 [2018-04-06 21:22:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:22:03,799 INFO L225 Difference]: With dead ends: 3036 [2018-04-06 21:22:03,799 INFO L226 Difference]: Without dead ends: 2588 [2018-04-06 21:22:03,805 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 [2018-04-06 21:22:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2018-04-06 21:22:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2578. [2018-04-06 21:22:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2578 states. [2018-04-06 21:22:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 2603 transitions. [2018-04-06 21:22:03,851 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 2603 transitions. Word has length 2425 [2018-04-06 21:22:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:22:03,853 INFO L459 AbstractCegarLoop]: Abstraction has 2578 states and 2603 transitions. [2018-04-06 21:22:03,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-04-06 21:22:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 2603 transitions. [2018-04-06 21:22:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2435 [2018-04-06 21:22:03,881 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:22:03,882 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] [2018-04-06 21:22:03,882 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]=== [2018-04-06 21:22:03,882 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 [2018-04-06 21:22:03,888 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:22:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:22:04,309 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:22:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 232523 backedges. 58732 proven. 2190 refuted. 0 times theorem prover too weak. 171601 trivial. 0 not checked. [2018-04-06 21:22:07,862 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:22:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 232523 backedges. 58732 proven. 2190 refuted. 0 times theorem prover too weak. 171601 trivial. 0 not checked. [2018-04-06 21:22:11,729 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:22:11,729 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 127 [2018-04-06 21:22:11,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-04-06 21:22:11,731 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-04-06 21:22:11,731 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1933, Invalid=14069, Unknown=0, NotChecked=0, Total=16002 [2018-04-06 21:22:11,732 INFO L87 Difference]: Start difference. First operand 2578 states and 2603 transitions. Second operand 127 states. [2018-04-06 21:22:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:22:16,808 INFO L93 Difference]: Finished difference Result 3210 states and 3261 transitions. [2018-04-06 21:22:16,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-04-06 21:22:16,843 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 2434 [2018-04-06 21:22:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:22:16,846 INFO L225 Difference]: With dead ends: 3210 [2018-04-06 21:22:16,847 INFO L226 Difference]: Without dead ends: 2779 [2018-04-06 21:22:16,851 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4989 GetRequests, 4699 SyntacticMatches, 43 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17207 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=8744, Invalid=53008, Unknown=0, NotChecked=0, Total=61752 [2018-04-06 21:22:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2018-04-06 21:22:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2768. [2018-04-06 21:22:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2768 states. [2018-04-06 21:22:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 2793 transitions. [2018-04-06 21:22:16,900 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 2793 transitions. Word has length 2434 [2018-04-06 21:22:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:22:16,901 INFO L459 AbstractCegarLoop]: Abstraction has 2768 states and 2793 transitions. [2018-04-06 21:22:16,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-04-06 21:22:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 2793 transitions. [2018-04-06 21:22:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2627 [2018-04-06 21:22:16,933 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:22:16,934 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] [2018-04-06 21:22:16,934 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]=== [2018-04-06 21:22:16,935 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 [2018-04-06 21:22:16,940 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:22:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:22:17,380 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-06 21:22:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 273582 backedges. 96592 proven. 1577 refuted. 0 times theorem prover too weak. 175413 trivial. 0 not checked. [2018-04-06 21:22:21,266 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:22:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 273582 backedges. 96592 proven. 1577 refuted. 0 times theorem prover too weak. 175413 trivial. 0 not checked. [2018-04-06 21:22:25,609 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-06 21:22:25,610 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 124 [2018-04-06 21:22:25,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-04-06 21:22:25,612 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-04-06 21:22:25,612 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1886, Invalid=13366, Unknown=0, NotChecked=0, Total=15252 [2018-04-06 21:22:25,613 INFO L87 Difference]: Start difference. First operand 2768 states and 2793 transitions. Second operand 124 states. [2018-04-06 21:22:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-06 21:22:28,096 INFO L93 Difference]: Finished difference Result 3215 states and 3272 transitions. [2018-04-06 21:22:28,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-04-06 21:22:28,096 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 2626 [2018-04-06 21:22:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-06 21:22:28,100 INFO L225 Difference]: With dead ends: 3215 [2018-04-06 21:22:28,100 INFO L226 Difference]: Without dead ends: 2778 [2018-04-06 21:22:28,106 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 5351 GetRequests, 5087 SyntacticMatches, 43 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19855 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7382, Invalid=42124, Unknown=0, NotChecked=0, Total=49506 [2018-04-06 21:22:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2018-04-06 21:22:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2768. [2018-04-06 21:22:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2768 states. [2018-04-06 21:22:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 2791 transitions. [2018-04-06 21:22:28,155 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 2791 transitions. Word has length 2626 [2018-04-06 21:22:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-06 21:22:28,156 INFO L459 AbstractCegarLoop]: Abstraction has 2768 states and 2791 transitions. [2018-04-06 21:22:28,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-04-06 21:22:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 2791 transitions. [2018-04-06 21:22:28,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2636 [2018-04-06 21:22:28,188 INFO L347 BasicCegarLoop]: Found error trace [2018-04-06 21:22:28,189 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] [2018-04-06 21:22:28,189 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]=== [2018-04-06 21:22:28,190 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 [2018-04-06 21:22:28,195 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-06 21:22:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-06 21:22:28,617 INFO L270 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-04-06 21:22:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 275787 backedges. 64532 proven. 2415 refuted. 0 times theorem prover too weak. 208840 trivial. 0 not checked. [2018-04-06 21:22:32,694 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-06 21:22:32,697 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-04-06 21:22:32,698 WARN L519 AbstractCegarLoop]: Verification canceled [2018-04-06 21:22:32,702 WARN L197 ceAbstractionStarter]: Timeout [2018-04-06 21:22:32,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:22:32 BoogieIcfgContainer [2018-04-06 21:22:32,702 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-04-06 21:22:32,703 INFO L168 Benchmark]: Toolchain (without parser) took 231007.26 ms. Allocated memory was 303.0 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 243.7 MB in the beginning and 286.4 MB in the end (delta: -42.7 MB). Peak memory consumption was 1.9 GB. Max. memory is 5.3 GB. [2018-04-06 21:22:32,704 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 303.0 MB. Free memory is still 263.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-04-06 21:22:32,704 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.97 ms. Allocated memory is still 303.0 MB. Free memory was 243.7 MB in the beginning and 233.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-04-06 21:22:32,704 INFO L168 Benchmark]: Boogie Preprocessor took 28.98 ms. Allocated memory is still 303.0 MB. Free memory was 233.7 MB in the beginning and 231.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-04-06 21:22:32,705 INFO L168 Benchmark]: RCFGBuilder took 290.09 ms. Allocated memory was 303.0 MB in the beginning and 459.3 MB in the end (delta: 156.2 MB). Free memory was 231.7 MB in the beginning and 424.0 MB in the end (delta: -192.4 MB). Peak memory consumption was 24.8 MB. Max. memory is 5.3 GB. [2018-04-06 21:22:32,705 INFO L168 Benchmark]: TraceAbstraction took 230467.66 ms. Allocated memory was 459.3 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 424.0 MB in the beginning and 286.4 MB in the end (delta: 137.7 MB). Peak memory consumption was 1.9 GB. Max. memory is 5.3 GB. [2018-04-06 21:22:32,707 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 303.0 MB. Free memory is still 263.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 215.97 ms. Allocated memory is still 303.0 MB. Free memory was 243.7 MB in the beginning and 233.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 28.98 ms. Allocated memory is still 303.0 MB. Free memory was 233.7 MB in the beginning and 231.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 290.09 ms. Allocated memory was 303.0 MB in the beginning and 459.3 MB in the end (delta: 156.2 MB). Free memory was 231.7 MB in the beginning and 424.0 MB in the end (delta: -192.4 MB). Peak memory consumption was 24.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 230467.66 ms. Allocated memory was 459.3 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 424.0 MB in the beginning and 286.4 MB in the end (delta: 137.7 MB). Peak memory consumption was 1.9 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 backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 90 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 backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 90 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 backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 90 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 backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 90 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 backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 90 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 backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 90 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 6 error locations. TIMEOUT Result, 230.4s 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, 23.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98615 GetRequests, 91789 SyntacticMatches, 1023 SemanticMatches, 5803 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280780 ImplicationChecksByTransitivity, 115.1s 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-0-2018-04-06_21-22-32-716.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-0-2018-04-06_21-22-32-716.csv Completed graceful shutdown