java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_true-valid-memsafety.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-453dfda-m [2018-04-09 22:08:39,694 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-04-09 22:08:39,696 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-04-09 22:08:39,710 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-04-09 22:08:39,711 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-04-09 22:08:39,712 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-04-09 22:08:39,712 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-04-09 22:08:39,714 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-04-09 22:08:39,717 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-04-09 22:08:39,718 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-04-09 22:08:39,719 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-04-09 22:08:39,719 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-04-09 22:08:39,720 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-04-09 22:08:39,722 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-04-09 22:08:39,723 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-04-09 22:08:39,725 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-04-09 22:08:39,727 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-04-09 22:08:39,729 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-04-09 22:08:39,731 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-04-09 22:08:39,732 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-04-09 22:08:39,735 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-04-09 22:08:39,735 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-04-09 22:08:39,735 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-04-09 22:08:39,737 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-04-09 22:08:39,738 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-04-09 22:08:39,739 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-04-09 22:08:39,739 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-04-09 22:08:39,740 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-04-09 22:08:39,741 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-04-09 22:08:39,741 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-04-09 22:08:39,742 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-04-09 22:08:39,742 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 [2018-04-09 22:08:39,767 INFO L110 SettingsManager]: Loading preferences was successful [2018-04-09 22:08:39,767 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-04-09 22:08:39,768 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-04-09 22:08:39,768 INFO L133 SettingsManager]: * ultimate.logging.details=de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation=DEBUG; [2018-04-09 22:08:39,768 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-04-09 22:08:39,769 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-04-09 22:08:39,769 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-04-09 22:08:39,769 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-04-09 22:08:39,769 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-04-09 22:08:39,769 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-04-09 22:08:39,770 INFO L131 SettingsManager]: Preferences of LTL2Aut differ from their defaults: [2018-04-09 22:08:39,770 INFO L133 SettingsManager]: * Property to check=[] a a: x > 42 [2018-04-09 22:08:39,770 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-04-09 22:08:39,770 INFO L133 SettingsManager]: * sizeof long=4 [2018-04-09 22:08:39,770 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-04-09 22:08:39,770 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-04-09 22:08:39,771 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-04-09 22:08:39,771 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-04-09 22:08:39,771 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-04-09 22:08:39,771 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-04-09 22:08:39,771 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-04-09 22:08:39,771 INFO L133 SettingsManager]: * sizeof long double=12 [2018-04-09 22:08:39,772 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-04-09 22:08:39,772 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-04-09 22:08:39,772 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-04-09 22:08:39,772 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-04-09 22:08:39,773 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-09 22:08:39,773 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-04-09 22:08:39,773 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-04-09 22:08:39,773 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-04-09 22:08:39,773 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-04-09 22:08:39,773 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-04-09 22:08:39,773 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:39,774 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-04-09 22:08:39,774 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-04-09 22:08:39,775 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-04-09 22:08:39,775 INFO L131 SettingsManager]: Preferences of Boogie Printer differ from their defaults: [2018-04-09 22:08:39,775 INFO L133 SettingsManager]: * Dump path:=C:\Users\alex\AppData\Local\Temp\ [2018-04-09 22:08:39,809 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-04-09 22:08:39,820 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-04-09 22:08:39,824 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-04-09 22:08:39,825 INFO L271 PluginConnector]: Initializing CDTParser... [2018-04-09 22:08:39,825 INFO L276 PluginConnector]: CDTParser initialized [2018-04-09 22:08:39,826 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength_true-valid-memsafety.c [2018-04-09 22:08:40,156 INFO L225 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG1aa7c3a5b [2018-04-09 22:08:40,280 INFO L287 CDTParser]: IsIndexed: true [2018-04-09 22:08:40,280 INFO L288 CDTParser]: Found 1 translation units. [2018-04-09 22:08:40,281 INFO L168 CDTParser]: Scanning ArraysOfVariableLength_true-valid-memsafety.c [2018-04-09 22:08:40,281 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-04-09 22:08:40,282 INFO L215 ultiparseSymbolTable]: [2018-04-09 22:08:40,282 INFO L218 ultiparseSymbolTable]: Function table: [2018-04-09 22:08:40,282 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in ArraysOfVariableLength_true-valid-memsafety.c [2018-04-09 22:08:40,282 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo ('foo') in ArraysOfVariableLength_true-valid-memsafety.c [2018-04-09 22:08:40,282 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-04-09 22:08:40,282 INFO L233 ultiparseSymbolTable]: [2018-04-09 22:08:40,298 INFO L330 CDTParser]: Deleted temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG1aa7c3a5b [2018-04-09 22:08:40,303 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-04-09 22:08:40,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-04-09 22:08:40,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-04-09 22:08:40,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-04-09 22:08:40,314 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-04-09 22:08:40,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.04 10:08:40" (1/1) ... [2018-04-09 22:08:40,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c995471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40, skipping insertion in model container [2018-04-09 22:08:40,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.04 10:08:40" (1/1) ... [2018-04-09 22:08:40,333 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-09 22:08:40,347 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-09 22:08:40,485 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-09 22:08:40,508 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-09 22:08:40,515 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 9 non ball SCCs. Number of states in SCCs 9. [2018-04-09 22:08:40,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40 WrapperNode [2018-04-09 22:08:40,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-04-09 22:08:40,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-04-09 22:08:40,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-04-09 22:08:40,528 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-04-09 22:08:40,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40" (1/1) ... [2018-04-09 22:08:40,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40" (1/1) ... [2018-04-09 22:08:40,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40" (1/1) ... [2018-04-09 22:08:40,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40" (1/1) ... [2018-04-09 22:08:40,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40" (1/1) ... [2018-04-09 22:08:40,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40" (1/1) ... [2018-04-09 22:08:40,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40" (1/1) ... [2018-04-09 22:08:40,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-04-09 22:08:40,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-04-09 22:08:40,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-04-09 22:08:40,566 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-04-09 22:08:40,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40" (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 [2018-04-09 22:08:40,629 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-04-09 22:08:40,629 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-04-09 22:08:40,629 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo [2018-04-09 22:08:40,630 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-04-09 22:08:40,630 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__foo [2018-04-09 22:08:40,630 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-04-09 22:08:40,630 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-04-09 22:08:40,630 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-04-09 22:08:40,630 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-04-09 22:08:40,631 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-04-09 22:08:40,631 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-04-09 22:08:40,631 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-04-09 22:08:40,631 INFO L128 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-04-09 22:08:40,916 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-04-09 22:08:40,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.04 10:08:40 BoogieIcfgContainer [2018-04-09 22:08:40,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-04-09 22:08:40,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-04-09 22:08:40,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-04-09 22:08:40,921 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-04-09 22:08:40,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.04 10:08:40" (1/3) ... [2018-04-09 22:08:40,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ca5bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.04 10:08:40, skipping insertion in model container [2018-04-09 22:08:40,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.04 10:08:40" (2/3) ... [2018-04-09 22:08:40,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ca5bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.04 10:08:40, skipping insertion in model container [2018-04-09 22:08:40,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.04 10:08:40" (3/3) ... [2018-04-09 22:08:40,925 INFO L107 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength_true-valid-memsafety.c [2018-04-09 22:08:40,935 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-04-09 22:08:40,942 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-04-09 22:08:40,981 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-04-09 22:08:40,982 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-04-09 22:08:40,982 INFO L370 AbstractCegarLoop]: Hoare is true [2018-04-09 22:08:40,983 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-04-09 22:08:40,983 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-04-09 22:08:40,983 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-04-09 22:08:40,983 INFO L374 AbstractCegarLoop]: Difference is false [2018-04-09 22:08:40,983 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-04-09 22:08:40,984 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-04-09 22:08:40,985 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-04-09 22:08:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-04-09 22:08:41,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-04-09 22:08:41,010 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:41,011 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:41,011 INFO L408 AbstractCegarLoop]: === Iteration 1 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash -338374626, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:41,029 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:41,067 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:41,083 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:41,126 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-09 22:08:41,127 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2018-04-09 22:08:41,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-04-09 22:08:41,138 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-04-09 22:08:41,139 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-04-09 22:08:41,141 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 2 states. [2018-04-09 22:08:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:41,167 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2018-04-09 22:08:41,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-04-09 22:08:41,168 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-04-09 22:08:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:41,176 INFO L225 Difference]: With dead ends: 119 [2018-04-09 22:08:41,176 INFO L226 Difference]: Without dead ends: 61 [2018-04-09 22:08:41,181 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-04-09 22:08:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-04-09 22:08:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-04-09 22:08:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-04-09 22:08:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2018-04-09 22:08:41,217 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 14 [2018-04-09 22:08:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:41,217 INFO L459 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2018-04-09 22:08:41,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-04-09 22:08:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2018-04-09 22:08:41,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-04-09 22:08:41,218 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:41,219 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:41,219 INFO L408 AbstractCegarLoop]: === Iteration 2 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:41,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1893692590, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:41,236 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:41,258 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:41,288 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:41,341 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-09 22:08:41,342 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-04-09 22:08:41,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-09 22:08:41,343 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-09 22:08:41,344 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-09 22:08:41,344 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 4 states. [2018-04-09 22:08:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:41,452 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2018-04-09 22:08:41,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-09 22:08:41,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-04-09 22:08:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:41,457 INFO L225 Difference]: With dead ends: 108 [2018-04-09 22:08:41,457 INFO L226 Difference]: Without dead ends: 88 [2018-04-09 22:08:41,458 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-09 22:08:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-04-09 22:08:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2018-04-09 22:08:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-04-09 22:08:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2018-04-09 22:08:41,472 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 15 [2018-04-09 22:08:41,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:41,472 INFO L459 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2018-04-09 22:08:41,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-09 22:08:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2018-04-09 22:08:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-04-09 22:08:41,473 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:41,474 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:41,474 INFO L408 AbstractCegarLoop]: === Iteration 3 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:41,474 INFO L82 PathProgramCache]: Analyzing trace with hash 217610606, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:41,483 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:41,510 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:41,573 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:41,650 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-09 22:08:41,650 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2018-04-09 22:08:41,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-09 22:08:41,651 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-09 22:08:41,651 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-04-09 22:08:41,651 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 7 states. [2018-04-09 22:08:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:41,828 INFO L93 Difference]: Finished difference Result 151 states and 159 transitions. [2018-04-09 22:08:41,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-04-09 22:08:41,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-04-09 22:08:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:41,829 INFO L225 Difference]: With dead ends: 151 [2018-04-09 22:08:41,829 INFO L226 Difference]: Without dead ends: 97 [2018-04-09 22:08:41,830 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-04-09 22:08:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-04-09 22:08:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2018-04-09 22:08:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-04-09 22:08:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2018-04-09 22:08:41,837 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 21 [2018-04-09 22:08:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:41,838 INFO L459 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2018-04-09 22:08:41,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-09 22:08:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2018-04-09 22:08:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-04-09 22:08:41,839 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:41,839 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] [2018-04-09 22:08:41,839 INFO L408 AbstractCegarLoop]: === Iteration 4 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:41,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2108346150, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:41,846 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:41,863 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:41,886 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 [2018-04-09 22:08:41,887 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:08:41,890 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:08:41,890 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-04-09 22:08:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:41,923 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:41,973 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-09 22:08:41,974 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 3 [2018-04-09 22:08:41,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-09 22:08:41,975 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-09 22:08:41,975 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-09 22:08:41,975 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 4 states. [2018-04-09 22:08:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:42,014 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2018-04-09 22:08:42,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-09 22:08:42,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-04-09 22:08:42,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:42,018 INFO L225 Difference]: With dead ends: 77 [2018-04-09 22:08:42,019 INFO L226 Difference]: Without dead ends: 75 [2018-04-09 22:08:42,019 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-09 22:08:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-04-09 22:08:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-04-09 22:08:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-04-09 22:08:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2018-04-09 22:08:42,029 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 25 [2018-04-09 22:08:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:42,029 INFO L459 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2018-04-09 22:08:42,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-09 22:08:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2018-04-09 22:08:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-04-09 22:08:42,030 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:42,030 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] [2018-04-09 22:08:42,031 INFO L408 AbstractCegarLoop]: === Iteration 5 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:42,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2108346151, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:42,044 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:42,065 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:42,073 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 [2018-04-09 22:08:42,073 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:08:42,082 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:08:42,082 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:08:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:42,163 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:42,280 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-09 22:08:42,280 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2018-04-09 22:08:42,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-04-09 22:08:42,281 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-04-09 22:08:42,281 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-04-09 22:08:42,281 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 9 states. [2018-04-09 22:08:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:42,461 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-04-09 22:08:42,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-09 22:08:42,462 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-04-09 22:08:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:42,463 INFO L225 Difference]: With dead ends: 80 [2018-04-09 22:08:42,463 INFO L226 Difference]: Without dead ends: 78 [2018-04-09 22:08:42,464 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-04-09 22:08:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-04-09 22:08:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-04-09 22:08:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-04-09 22:08:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2018-04-09 22:08:42,473 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 25 [2018-04-09 22:08:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:42,475 INFO L459 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2018-04-09 22:08:42,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-04-09 22:08:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2018-04-09 22:08:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-04-09 22:08:42,477 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:42,477 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:42,477 INFO L408 AbstractCegarLoop]: === Iteration 6 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:42,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1601375567, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:42,501 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:42,522 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:42,659 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:42,746 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-09 22:08:42,746 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2018-04-09 22:08:42,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-04-09 22:08:42,747 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-04-09 22:08:42,747 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-04-09 22:08:42,747 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 9 states. [2018-04-09 22:08:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:42,945 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2018-04-09 22:08:42,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-09 22:08:42,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2018-04-09 22:08:42,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:42,947 INFO L225 Difference]: With dead ends: 107 [2018-04-09 22:08:42,947 INFO L226 Difference]: Without dead ends: 106 [2018-04-09 22:08:42,947 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-04-09 22:08:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-04-09 22:08:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2018-04-09 22:08:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-04-09 22:08:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2018-04-09 22:08:42,958 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 41 [2018-04-09 22:08:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:42,959 INFO L459 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2018-04-09 22:08:42,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-04-09 22:08:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2018-04-09 22:08:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-04-09 22:08:42,960 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:42,960 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:42,961 INFO L408 AbstractCegarLoop]: === Iteration 7 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1896965090, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:42,967 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:42,984 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:42,987 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 [2018-04-09 22:08:42,987 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:08:42,989 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:08:42,989 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-04-09 22:08:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-09 22:08:43,016 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-09 22:08:43,048 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-09 22:08:43,048 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2018-04-09 22:08:43,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-04-09 22:08:43,049 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-04-09 22:08:43,049 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-04-09 22:08:43,049 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 6 states. [2018-04-09 22:08:43,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:43,118 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-04-09 22:08:43,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-04-09 22:08:43,118 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2018-04-09 22:08:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:43,120 INFO L225 Difference]: With dead ends: 81 [2018-04-09 22:08:43,120 INFO L226 Difference]: Without dead ends: 80 [2018-04-09 22:08:43,120 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-04-09 22:08:43,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-04-09 22:08:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-04-09 22:08:43,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-04-09 22:08:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2018-04-09 22:08:43,130 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 42 [2018-04-09 22:08:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:43,130 INFO L459 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2018-04-09 22:08:43,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-04-09 22:08:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2018-04-09 22:08:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-04-09 22:08:43,132 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:43,132 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:43,132 INFO L408 AbstractCegarLoop]: === Iteration 8 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:43,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1896965091, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:43,149 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:43,174 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:43,181 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 [2018-04-09 22:08:43,182 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:08:43,185 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:08:43,186 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:08:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-09 22:08:43,242 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-09 22:08:43,311 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-09 22:08:43,311 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2018-04-09 22:08:43,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-04-09 22:08:43,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-04-09 22:08:43,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-04-09 22:08:43,312 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 11 states. [2018-04-09 22:08:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:43,415 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-04-09 22:08:43,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-04-09 22:08:43,415 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2018-04-09 22:08:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:43,416 INFO L225 Difference]: With dead ends: 89 [2018-04-09 22:08:43,416 INFO L226 Difference]: Without dead ends: 88 [2018-04-09 22:08:43,417 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-04-09 22:08:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-04-09 22:08:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2018-04-09 22:08:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-04-09 22:08:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2018-04-09 22:08:43,423 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 42 [2018-04-09 22:08:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:43,424 INFO L459 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2018-04-09 22:08:43,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-04-09 22:08:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2018-04-09 22:08:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-04-09 22:08:43,425 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:43,425 INFO L355 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:43,425 INFO L408 AbstractCegarLoop]: === Iteration 9 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:43,426 INFO L82 PathProgramCache]: Analyzing trace with hash 80690624, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:43,432 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:43,449 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:43,471 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:43,538 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:43,538 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-04-09 22:08:43,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-09 22:08:43,539 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-09 22:08:43,539 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-04-09 22:08:43,539 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 8 states. [2018-04-09 22:08:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:43,654 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2018-04-09 22:08:43,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-09 22:08:43,655 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2018-04-09 22:08:43,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:43,657 INFO L225 Difference]: With dead ends: 131 [2018-04-09 22:08:43,657 INFO L226 Difference]: Without dead ends: 109 [2018-04-09 22:08:43,658 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-04-09 22:08:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-04-09 22:08:43,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2018-04-09 22:08:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-04-09 22:08:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2018-04-09 22:08:43,667 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 41 [2018-04-09 22:08:43,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:43,667 INFO L459 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2018-04-09 22:08:43,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-09 22:08:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2018-04-09 22:08:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-04-09 22:08:43,670 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:43,670 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:43,670 INFO L408 AbstractCegarLoop]: === Iteration 10 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:43,670 INFO L82 PathProgramCache]: Analyzing trace with hash -737480982, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:43,682 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:43,704 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-09 22:08:43,745 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-09 22:08:43,823 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-04-09 22:08:43,823 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2018-04-09 22:08:43,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-04-09 22:08:43,824 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-04-09 22:08:43,824 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-04-09 22:08:43,824 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 10 states. [2018-04-09 22:08:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:43,925 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2018-04-09 22:08:43,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-04-09 22:08:43,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2018-04-09 22:08:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:43,927 INFO L225 Difference]: With dead ends: 179 [2018-04-09 22:08:43,927 INFO L226 Difference]: Without dead ends: 112 [2018-04-09 22:08:43,928 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-04-09 22:08:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-04-09 22:08:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 96. [2018-04-09 22:08:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-04-09 22:08:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2018-04-09 22:08:43,937 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 45 [2018-04-09 22:08:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:43,937 INFO L459 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2018-04-09 22:08:43,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-04-09 22:08:43,937 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2018-04-09 22:08:43,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-04-09 22:08:43,938 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:43,939 INFO L355 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:43,939 INFO L408 AbstractCegarLoop]: === Iteration 11 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:43,939 INFO L82 PathProgramCache]: Analyzing trace with hash 335887572, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:43,946 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:43,963 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:44,019 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-09 22:08:44,083 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:44,083 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-04-09 22:08:44,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-04-09 22:08:44,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-04-09 22:08:44,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-04-09 22:08:44,084 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 13 states. [2018-04-09 22:08:44,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:44,322 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2018-04-09 22:08:44,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-04-09 22:08:44,323 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2018-04-09 22:08:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:44,324 INFO L225 Difference]: With dead ends: 191 [2018-04-09 22:08:44,324 INFO L226 Difference]: Without dead ends: 127 [2018-04-09 22:08:44,325 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2018-04-09 22:08:44,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-04-09 22:08:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2018-04-09 22:08:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-04-09 22:08:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2018-04-09 22:08:44,334 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 50 [2018-04-09 22:08:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:44,335 INFO L459 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2018-04-09 22:08:44,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-04-09 22:08:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2018-04-09 22:08:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-04-09 22:08:44,336 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:44,336 INFO L355 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:44,336 INFO L408 AbstractCegarLoop]: === Iteration 12 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:44,337 INFO L82 PathProgramCache]: Analyzing trace with hash -532975731, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:44,344 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:44,365 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:44,368 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 [2018-04-09 22:08:44,368 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:08:44,372 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:08:44,372 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:08:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-09 22:08:44,466 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-09 22:08:44,569 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:44,569 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2018-04-09 22:08:44,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-04-09 22:08:44,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-04-09 22:08:44,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-04-09 22:08:44,570 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 11 states. [2018-04-09 22:08:44,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:44,736 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2018-04-09 22:08:44,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-04-09 22:08:44,737 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2018-04-09 22:08:44,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:44,738 INFO L225 Difference]: With dead ends: 128 [2018-04-09 22:08:44,739 INFO L226 Difference]: Without dead ends: 127 [2018-04-09 22:08:44,739 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-04-09 22:08:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-04-09 22:08:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2018-04-09 22:08:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-04-09 22:08:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2018-04-09 22:08:44,750 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 54 [2018-04-09 22:08:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:44,750 INFO L459 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2018-04-09 22:08:44,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-04-09 22:08:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2018-04-09 22:08:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-04-09 22:08:44,751 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:44,751 INFO L355 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:44,751 INFO L408 AbstractCegarLoop]: === Iteration 13 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833070, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:44,757 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:44,790 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-09 22:08:44,893 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-09 22:08:44,997 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:44,998 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2018-04-09 22:08:44,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-04-09 22:08:44,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-04-09 22:08:44,998 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-04-09 22:08:44,999 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand 15 states. [2018-04-09 22:08:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:45,270 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2018-04-09 22:08:45,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-04-09 22:08:45,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2018-04-09 22:08:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:45,272 INFO L225 Difference]: With dead ends: 149 [2018-04-09 22:08:45,272 INFO L226 Difference]: Without dead ends: 148 [2018-04-09 22:08:45,273 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2018-04-09 22:08:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-04-09 22:08:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 127. [2018-04-09 22:08:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-04-09 22:08:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2018-04-09 22:08:45,282 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 79 [2018-04-09 22:08:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:45,282 INFO L459 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2018-04-09 22:08:45,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-04-09 22:08:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2018-04-09 22:08:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-04-09 22:08:45,284 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:45,284 INFO L355 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:45,284 INFO L408 AbstractCegarLoop]: === Iteration 14 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1006086918, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:45,290 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:45,314 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:45,318 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 [2018-04-09 22:08:45,318 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:08:45,321 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:08:45,321 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:08:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-04-09 22:08:45,422 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-04-09 22:08:45,569 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:45,569 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2018-04-09 22:08:45,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-04-09 22:08:45,570 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-04-09 22:08:45,570 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-04-09 22:08:45,570 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 15 states. [2018-04-09 22:08:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:45,840 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2018-04-09 22:08:45,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-04-09 22:08:45,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2018-04-09 22:08:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:45,842 INFO L225 Difference]: With dead ends: 145 [2018-04-09 22:08:45,842 INFO L226 Difference]: Without dead ends: 144 [2018-04-09 22:08:45,843 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2018-04-09 22:08:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-04-09 22:08:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2018-04-09 22:08:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-04-09 22:08:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2018-04-09 22:08:45,855 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 80 [2018-04-09 22:08:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:45,855 INFO L459 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2018-04-09 22:08:45,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-04-09 22:08:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2018-04-09 22:08:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-04-09 22:08:45,856 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:45,857 INFO L355 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:45,857 INFO L408 AbstractCegarLoop]: === Iteration 15 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash -653283081, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:45,864 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:45,897 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-09 22:08:45,995 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-04-09 22:08:46,095 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:46,095 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-04-09 22:08:46,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-09 22:08:46,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-09 22:08:46,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-04-09 22:08:46,096 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand 19 states. [2018-04-09 22:08:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:46,385 INFO L93 Difference]: Finished difference Result 258 states and 273 transitions. [2018-04-09 22:08:46,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-09 22:08:46,386 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2018-04-09 22:08:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:46,387 INFO L225 Difference]: With dead ends: 258 [2018-04-09 22:08:46,387 INFO L226 Difference]: Without dead ends: 182 [2018-04-09 22:08:46,388 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 151 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2018-04-09 22:08:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-04-09 22:08:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2018-04-09 22:08:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-04-09 22:08:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 173 transitions. [2018-04-09 22:08:46,397 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 173 transitions. Word has length 88 [2018-04-09 22:08:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:46,397 INFO L459 AbstractCegarLoop]: Abstraction has 166 states and 173 transitions. [2018-04-09 22:08:46,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-09 22:08:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 173 transitions. [2018-04-09 22:08:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-04-09 22:08:46,398 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:46,398 INFO L355 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:46,398 INFO L408 AbstractCegarLoop]: === Iteration 16 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:46,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1151066240, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:46,405 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:46,430 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-04-09 22:08:46,499 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-04-09 22:08:46,615 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:46,615 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-04-09 22:08:46,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-09 22:08:46,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-09 22:08:46,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-04-09 22:08:46,616 INFO L87 Difference]: Start difference. First operand 166 states and 173 transitions. Second operand 16 states. [2018-04-09 22:08:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:46,886 INFO L93 Difference]: Finished difference Result 260 states and 272 transitions. [2018-04-09 22:08:46,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-04-09 22:08:46,886 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2018-04-09 22:08:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:46,888 INFO L225 Difference]: With dead ends: 260 [2018-04-09 22:08:46,888 INFO L226 Difference]: Without dead ends: 178 [2018-04-09 22:08:46,889 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 177 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2018-04-09 22:08:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-04-09 22:08:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2018-04-09 22:08:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-04-09 22:08:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 171 transitions. [2018-04-09 22:08:46,901 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 171 transitions. Word has length 99 [2018-04-09 22:08:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:46,901 INFO L459 AbstractCegarLoop]: Abstraction has 166 states and 171 transitions. [2018-04-09 22:08:46,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-09 22:08:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 171 transitions. [2018-04-09 22:08:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-04-09 22:08:46,903 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:46,903 INFO L355 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:46,903 INFO L408 AbstractCegarLoop]: === Iteration 17 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:46,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2046842569, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:46,914 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:46,953 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-04-09 22:08:46,990 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-04-09 22:08:47,079 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:47,079 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-04-09 22:08:47,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-04-09 22:08:47,080 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-04-09 22:08:47,080 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-04-09 22:08:47,080 INFO L87 Difference]: Start difference. First operand 166 states and 171 transitions. Second operand 16 states. [2018-04-09 22:08:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:47,238 INFO L93 Difference]: Finished difference Result 236 states and 248 transitions. [2018-04-09 22:08:47,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-09 22:08:47,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2018-04-09 22:08:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:47,240 INFO L225 Difference]: With dead ends: 236 [2018-04-09 22:08:47,240 INFO L226 Difference]: Without dead ends: 214 [2018-04-09 22:08:47,241 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2018-04-09 22:08:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-04-09 22:08:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 199. [2018-04-09 22:08:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-04-09 22:08:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 210 transitions. [2018-04-09 22:08:47,256 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 210 transitions. Word has length 108 [2018-04-09 22:08:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:47,256 INFO L459 AbstractCegarLoop]: Abstraction has 199 states and 210 transitions. [2018-04-09 22:08:47,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-04-09 22:08:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 210 transitions. [2018-04-09 22:08:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-04-09 22:08:47,258 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:47,258 INFO L355 BasicCegarLoop]: trace histogram [9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:47,258 INFO L408 AbstractCegarLoop]: === Iteration 18 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1908732634, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:47,266 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:47,300 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-04-09 22:08:47,440 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-04-09 22:08:47,568 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:47,568 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2018-04-09 22:08:47,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-04-09 22:08:47,569 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-04-09 22:08:47,569 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2018-04-09 22:08:47,569 INFO L87 Difference]: Start difference. First operand 199 states and 210 transitions. Second operand 21 states. [2018-04-09 22:08:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:47,951 INFO L93 Difference]: Finished difference Result 219 states and 231 transitions. [2018-04-09 22:08:47,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-09 22:08:47,951 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 126 [2018-04-09 22:08:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:47,954 INFO L225 Difference]: With dead ends: 219 [2018-04-09 22:08:47,954 INFO L226 Difference]: Without dead ends: 218 [2018-04-09 22:08:47,955 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 224 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2018-04-09 22:08:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-04-09 22:08:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 199. [2018-04-09 22:08:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-04-09 22:08:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 209 transitions. [2018-04-09 22:08:47,966 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 209 transitions. Word has length 126 [2018-04-09 22:08:47,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:47,966 INFO L459 AbstractCegarLoop]: Abstraction has 199 states and 209 transitions. [2018-04-09 22:08:47,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-04-09 22:08:47,966 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 209 transitions. [2018-04-09 22:08:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-04-09 22:08:47,967 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:47,967 INFO L355 BasicCegarLoop]: trace histogram [9, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:47,967 INFO L408 AbstractCegarLoop]: === Iteration 19 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:47,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1266987667, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:47,976 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:48,004 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 138 proven. 13 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-04-09 22:08:48,090 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 138 proven. 13 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-04-09 22:08:48,251 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:48,251 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-04-09 22:08:48,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-04-09 22:08:48,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-04-09 22:08:48,252 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2018-04-09 22:08:48,252 INFO L87 Difference]: Start difference. First operand 199 states and 209 transitions. Second operand 22 states. [2018-04-09 22:08:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:48,549 INFO L93 Difference]: Finished difference Result 318 states and 339 transitions. [2018-04-09 22:08:48,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-04-09 22:08:48,549 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 130 [2018-04-09 22:08:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:48,551 INFO L225 Difference]: With dead ends: 318 [2018-04-09 22:08:48,551 INFO L226 Difference]: Without dead ends: 215 [2018-04-09 22:08:48,552 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 231 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2018-04-09 22:08:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-04-09 22:08:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 199. [2018-04-09 22:08:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-04-09 22:08:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 208 transitions. [2018-04-09 22:08:48,564 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 208 transitions. Word has length 130 [2018-04-09 22:08:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:48,565 INFO L459 AbstractCegarLoop]: Abstraction has 199 states and 208 transitions. [2018-04-09 22:08:48,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-04-09 22:08:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 208 transitions. [2018-04-09 22:08:48,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-04-09 22:08:48,567 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:48,567 INFO L355 BasicCegarLoop]: trace histogram [10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:48,567 INFO L408 AbstractCegarLoop]: === Iteration 20 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1099979467, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:48,581 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:48,620 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 168 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-04-09 22:08:48,753 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 168 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-04-09 22:08:48,922 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:48,922 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2018-04-09 22:08:48,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-09 22:08:48,923 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-09 22:08:48,923 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2018-04-09 22:08:48,924 INFO L87 Difference]: Start difference. First operand 199 states and 208 transitions. Second operand 25 states. [2018-04-09 22:08:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:49,356 INFO L93 Difference]: Finished difference Result 348 states and 365 transitions. [2018-04-09 22:08:49,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-04-09 22:08:49,356 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 135 [2018-04-09 22:08:49,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:49,357 INFO L225 Difference]: With dead ends: 348 [2018-04-09 22:08:49,358 INFO L226 Difference]: Without dead ends: 248 [2018-04-09 22:08:49,359 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 237 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2018-04-09 22:08:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-04-09 22:08:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 237. [2018-04-09 22:08:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-04-09 22:08:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 245 transitions. [2018-04-09 22:08:49,369 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 245 transitions. Word has length 135 [2018-04-09 22:08:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:49,369 INFO L459 AbstractCegarLoop]: Abstraction has 237 states and 245 transitions. [2018-04-09 22:08:49,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-09 22:08:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 245 transitions. [2018-04-09 22:08:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-04-09 22:08:49,370 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:49,370 INFO L355 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:49,370 INFO L408 AbstractCegarLoop]: === Iteration 21 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:49,370 INFO L82 PathProgramCache]: Analyzing trace with hash -158811644, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:49,391 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:49,429 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:49,448 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 [2018-04-09 22:08:49,449 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:08:49,489 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:08:49,490 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:08:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-04-09 22:08:50,272 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-04-09 22:08:50,546 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:50,546 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-04-09 22:08:50,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-09 22:08:50,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-09 22:08:50,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2018-04-09 22:08:50,547 INFO L87 Difference]: Start difference. First operand 237 states and 245 transitions. Second operand 19 states. [2018-04-09 22:08:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:51,039 INFO L93 Difference]: Finished difference Result 249 states and 259 transitions. [2018-04-09 22:08:51,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-04-09 22:08:51,040 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 139 [2018-04-09 22:08:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:51,042 INFO L225 Difference]: With dead ends: 249 [2018-04-09 22:08:51,042 INFO L226 Difference]: Without dead ends: 248 [2018-04-09 22:08:51,043 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 253 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=339, Invalid=783, Unknown=0, NotChecked=0, Total=1122 [2018-04-09 22:08:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-04-09 22:08:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2018-04-09 22:08:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-04-09 22:08:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 246 transitions. [2018-04-09 22:08:51,058 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 246 transitions. Word has length 139 [2018-04-09 22:08:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:51,058 INFO L459 AbstractCegarLoop]: Abstraction has 240 states and 246 transitions. [2018-04-09 22:08:51,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-09 22:08:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 246 transitions. [2018-04-09 22:08:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-04-09 22:08:51,060 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:51,060 INFO L355 BasicCegarLoop]: trace histogram [14, 10, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:51,060 INFO L408 AbstractCegarLoop]: === Iteration 22 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:51,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1773837943, now seen corresponding path program 6 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:51,069 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:51,111 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 302 proven. 36 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-04-09 22:08:51,253 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 302 proven. 36 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-04-09 22:08:51,438 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:51,438 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2018-04-09 22:08:51,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-04-09 22:08:51,439 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-04-09 22:08:51,439 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2018-04-09 22:08:51,440 INFO L87 Difference]: Start difference. First operand 240 states and 246 transitions. Second operand 27 states. [2018-04-09 22:08:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:52,043 INFO L93 Difference]: Finished difference Result 270 states and 279 transitions. [2018-04-09 22:08:52,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-04-09 22:08:52,043 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 182 [2018-04-09 22:08:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:52,045 INFO L225 Difference]: With dead ends: 270 [2018-04-09 22:08:52,045 INFO L226 Difference]: Without dead ends: 269 [2018-04-09 22:08:52,046 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 329 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2018-04-09 22:08:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-04-09 22:08:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 248. [2018-04-09 22:08:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-04-09 22:08:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 255 transitions. [2018-04-09 22:08:52,066 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 255 transitions. Word has length 182 [2018-04-09 22:08:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:52,066 INFO L459 AbstractCegarLoop]: Abstraction has 248 states and 255 transitions. [2018-04-09 22:08:52,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-04-09 22:08:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 255 transitions. [2018-04-09 22:08:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-04-09 22:08:52,068 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:52,068 INFO L355 BasicCegarLoop]: trace histogram [14, 10, 10, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:52,068 INFO L408 AbstractCegarLoop]: === Iteration 23 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash -845598499, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:52,079 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:52,131 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:52,134 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 [2018-04-09 22:08:52,134 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:08:52,137 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:08:52,137 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:08:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 242 proven. 39 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-04-09 22:08:52,347 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 242 proven. 39 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2018-04-09 22:08:52,531 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:52,532 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-04-09 22:08:52,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-04-09 22:08:52,532 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-04-09 22:08:52,532 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2018-04-09 22:08:52,532 INFO L87 Difference]: Start difference. First operand 248 states and 255 transitions. Second operand 23 states. [2018-04-09 22:08:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:53,279 INFO L93 Difference]: Finished difference Result 292 states and 317 transitions. [2018-04-09 22:08:53,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-04-09 22:08:53,279 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 183 [2018-04-09 22:08:53,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:53,281 INFO L225 Difference]: With dead ends: 292 [2018-04-09 22:08:53,281 INFO L226 Difference]: Without dead ends: 291 [2018-04-09 22:08:53,282 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 341 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1344, Unknown=0, NotChecked=0, Total=1806 [2018-04-09 22:08:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-04-09 22:08:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 276. [2018-04-09 22:08:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-04-09 22:08:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 289 transitions. [2018-04-09 22:08:53,297 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 289 transitions. Word has length 183 [2018-04-09 22:08:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:53,297 INFO L459 AbstractCegarLoop]: Abstraction has 276 states and 289 transitions. [2018-04-09 22:08:53,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-04-09 22:08:53,297 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 289 transitions. [2018-04-09 22:08:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-04-09 22:08:53,298 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:53,298 INFO L355 BasicCegarLoop]: trace histogram [15, 11, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:53,298 INFO L408 AbstractCegarLoop]: === Iteration 24 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:53,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1289056206, now seen corresponding path program 7 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:53,313 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:53,360 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 364 proven. 66 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-04-09 22:08:53,535 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 364 proven. 66 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2018-04-09 22:08:53,736 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:53,736 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2018-04-09 22:08:53,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-04-09 22:08:53,737 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-04-09 22:08:53,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2018-04-09 22:08:53,737 INFO L87 Difference]: Start difference. First operand 276 states and 289 transitions. Second operand 31 states. [2018-04-09 22:08:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:54,294 INFO L93 Difference]: Finished difference Result 466 states and 493 transitions. [2018-04-09 22:08:54,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-04-09 22:08:54,295 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 191 [2018-04-09 22:08:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:54,297 INFO L225 Difference]: With dead ends: 466 [2018-04-09 22:08:54,297 INFO L226 Difference]: Without dead ends: 336 [2018-04-09 22:08:54,299 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 341 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2018-04-09 22:08:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2018-04-09 22:08:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 323. [2018-04-09 22:08:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-04-09 22:08:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 336 transitions. [2018-04-09 22:08:54,318 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 336 transitions. Word has length 191 [2018-04-09 22:08:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:54,319 INFO L459 AbstractCegarLoop]: Abstraction has 323 states and 336 transitions. [2018-04-09 22:08:54,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-04-09 22:08:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 336 transitions. [2018-04-09 22:08:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-04-09 22:08:54,320 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:54,321 INFO L355 BasicCegarLoop]: trace histogram [19, 14, 13, 13, 13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:54,321 INFO L408 AbstractCegarLoop]: === Iteration 25 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash -321863814, now seen corresponding path program 8 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:54,328 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:54,388 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 766 proven. 33 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-04-09 22:08:54,530 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 766 proven. 33 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-04-09 22:08:54,768 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:54,768 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2018-04-09 22:08:54,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-04-09 22:08:54,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-04-09 22:08:54,769 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2018-04-09 22:08:54,769 INFO L87 Difference]: Start difference. First operand 323 states and 336 transitions. Second operand 28 states. [2018-04-09 22:08:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:55,119 INFO L93 Difference]: Finished difference Result 471 states and 497 transitions. [2018-04-09 22:08:55,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-04-09 22:08:55,119 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 238 [2018-04-09 22:08:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:55,121 INFO L225 Difference]: With dead ends: 471 [2018-04-09 22:08:55,121 INFO L226 Difference]: Without dead ends: 335 [2018-04-09 22:08:55,122 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 439 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2018-04-09 22:08:55,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-04-09 22:08:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 323. [2018-04-09 22:08:55,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-04-09 22:08:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 334 transitions. [2018-04-09 22:08:55,134 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 334 transitions. Word has length 238 [2018-04-09 22:08:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:55,134 INFO L459 AbstractCegarLoop]: Abstraction has 323 states and 334 transitions. [2018-04-09 22:08:55,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-04-09 22:08:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 334 transitions. [2018-04-09 22:08:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-04-09 22:08:55,136 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:55,136 INFO L355 BasicCegarLoop]: trace histogram [20, 15, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:55,136 INFO L408 AbstractCegarLoop]: === Iteration 26 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1519624145, now seen corresponding path program 9 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:55,144 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:55,206 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 575 proven. 66 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-04-09 22:08:55,448 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 575 proven. 66 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-04-09 22:08:55,809 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:55,809 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 32 [2018-04-09 22:08:55,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-04-09 22:08:55,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-04-09 22:08:55,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2018-04-09 22:08:55,810 INFO L87 Difference]: Start difference. First operand 323 states and 334 transitions. Second operand 33 states. [2018-04-09 22:08:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:56,517 INFO L93 Difference]: Finished difference Result 339 states and 350 transitions. [2018-04-09 22:08:56,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-04-09 22:08:56,517 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 247 [2018-04-09 22:08:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:56,519 INFO L225 Difference]: With dead ends: 339 [2018-04-09 22:08:56,519 INFO L226 Difference]: Without dead ends: 338 [2018-04-09 22:08:56,520 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 450 SyntacticMatches, 13 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=2783, Unknown=0, NotChecked=0, Total=3192 [2018-04-09 22:08:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-04-09 22:08:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 323. [2018-04-09 22:08:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-04-09 22:08:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 333 transitions. [2018-04-09 22:08:56,540 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 333 transitions. Word has length 247 [2018-04-09 22:08:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:56,540 INFO L459 AbstractCegarLoop]: Abstraction has 323 states and 333 transitions. [2018-04-09 22:08:56,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-04-09 22:08:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 333 transitions. [2018-04-09 22:08:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-04-09 22:08:56,542 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:56,543 INFO L355 BasicCegarLoop]: trace histogram [21, 16, 15, 15, 15, 15, 15, 15, 15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:56,543 INFO L408 AbstractCegarLoop]: === Iteration 27 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:56,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1801409460, now seen corresponding path program 10 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:56,549 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:56,614 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 675 proven. 105 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-04-09 22:08:56,857 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 675 proven. 105 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2018-04-09 22:08:57,168 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:57,168 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 37 [2018-04-09 22:08:57,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-04-09 22:08:57,169 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-04-09 22:08:57,169 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-04-09 22:08:57,169 INFO L87 Difference]: Start difference. First operand 323 states and 333 transitions. Second operand 37 states. [2018-04-09 22:08:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:57,797 INFO L93 Difference]: Finished difference Result 513 states and 534 transitions. [2018-04-09 22:08:57,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-04-09 22:08:57,798 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 256 [2018-04-09 22:08:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:57,800 INFO L225 Difference]: With dead ends: 513 [2018-04-09 22:08:57,800 INFO L226 Difference]: Without dead ends: 392 [2018-04-09 22:08:57,802 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 463 SyntacticMatches, 13 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=779, Invalid=3913, Unknown=0, NotChecked=0, Total=4692 [2018-04-09 22:08:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2018-04-09 22:08:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 379. [2018-04-09 22:08:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-04-09 22:08:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 389 transitions. [2018-04-09 22:08:57,825 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 389 transitions. Word has length 256 [2018-04-09 22:08:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:57,826 INFO L459 AbstractCegarLoop]: Abstraction has 379 states and 389 transitions. [2018-04-09 22:08:57,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-04-09 22:08:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 389 transitions. [2018-04-09 22:08:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-04-09 22:08:57,829 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:57,829 INFO L355 BasicCegarLoop]: trace histogram [26, 20, 19, 19, 19, 19, 19, 19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:57,829 INFO L408 AbstractCegarLoop]: === Iteration 28 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash 762690577, now seen corresponding path program 11 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:57,839 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:57,918 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 1393 proven. 62 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2018-04-09 22:08:58,262 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:08:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 1393 proven. 62 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2018-04-09 22:08:58,871 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:08:58,871 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 34 [2018-04-09 22:08:58,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-04-09 22:08:58,872 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-04-09 22:08:58,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2018-04-09 22:08:58,872 INFO L87 Difference]: Start difference. First operand 379 states and 389 transitions. Second operand 34 states. [2018-04-09 22:08:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:08:59,413 INFO L93 Difference]: Finished difference Result 518 states and 537 transitions. [2018-04-09 22:08:59,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-04-09 22:08:59,413 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 312 [2018-04-09 22:08:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:08:59,415 INFO L225 Difference]: With dead ends: 518 [2018-04-09 22:08:59,415 INFO L226 Difference]: Without dead ends: 391 [2018-04-09 22:08:59,417 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 579 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=572, Invalid=2734, Unknown=0, NotChecked=0, Total=3306 [2018-04-09 22:08:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-04-09 22:08:59,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 379. [2018-04-09 22:08:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-04-09 22:08:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 387 transitions. [2018-04-09 22:08:59,430 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 387 transitions. Word has length 312 [2018-04-09 22:08:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:08:59,430 INFO L459 AbstractCegarLoop]: Abstraction has 379 states and 387 transitions. [2018-04-09 22:08:59,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-04-09 22:08:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 387 transitions. [2018-04-09 22:08:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-04-09 22:08:59,432 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:08:59,432 INFO L355 BasicCegarLoop]: trace histogram [27, 21, 20, 20, 20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:08:59,432 INFO L408 AbstractCegarLoop]: === Iteration 29 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:08:59,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1918770318, now seen corresponding path program 12 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:08:59,445 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:08:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:08:59,521 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:08:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2376 backedges. 981 proven. 105 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-04-09 22:08:59,842 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2376 backedges. 981 proven. 105 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-04-09 22:09:00,270 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:00,270 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 38 [2018-04-09 22:09:00,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-04-09 22:09:00,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-04-09 22:09:00,271 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2018-04-09 22:09:00,271 INFO L87 Difference]: Start difference. First operand 379 states and 387 transitions. Second operand 39 states. [2018-04-09 22:09:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:01,143 INFO L93 Difference]: Finished difference Result 395 states and 402 transitions. [2018-04-09 22:09:01,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-04-09 22:09:01,143 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 321 [2018-04-09 22:09:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:01,145 INFO L225 Difference]: With dead ends: 395 [2018-04-09 22:09:01,145 INFO L226 Difference]: Without dead ends: 394 [2018-04-09 22:09:01,146 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 590 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=544, Invalid=4012, Unknown=0, NotChecked=0, Total=4556 [2018-04-09 22:09:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2018-04-09 22:09:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 379. [2018-04-09 22:09:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-04-09 22:09:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 386 transitions. [2018-04-09 22:09:01,161 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 386 transitions. Word has length 321 [2018-04-09 22:09:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:01,161 INFO L459 AbstractCegarLoop]: Abstraction has 379 states and 386 transitions. [2018-04-09 22:09:01,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-04-09 22:09:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 386 transitions. [2018-04-09 22:09:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-04-09 22:09:01,163 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:01,163 INFO L355 BasicCegarLoop]: trace histogram [28, 22, 21, 21, 21, 21, 21, 21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:01,163 INFO L408 AbstractCegarLoop]: === Iteration 30 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1675156375, now seen corresponding path program 13 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:01,174 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:01,251 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2571 backedges. 1128 proven. 153 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-04-09 22:09:01,622 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2571 backedges. 1128 proven. 153 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-04-09 22:09:01,948 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:01,948 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 43 [2018-04-09 22:09:01,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-04-09 22:09:01,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-04-09 22:09:01,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2018-04-09 22:09:01,950 INFO L87 Difference]: Start difference. First operand 379 states and 386 transitions. Second operand 43 states. [2018-04-09 22:09:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:02,712 INFO L93 Difference]: Finished difference Result 572 states and 587 transitions. [2018-04-09 22:09:02,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-04-09 22:09:02,712 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 330 [2018-04-09 22:09:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:02,714 INFO L225 Difference]: With dead ends: 572 [2018-04-09 22:09:02,714 INFO L226 Difference]: Without dead ends: 460 [2018-04-09 22:09:02,716 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 603 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1044, Invalid=5436, Unknown=0, NotChecked=0, Total=6480 [2018-04-09 22:09:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2018-04-09 22:09:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 444. [2018-04-09 22:09:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-04-09 22:09:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 451 transitions. [2018-04-09 22:09:02,731 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 451 transitions. Word has length 330 [2018-04-09 22:09:02,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:02,731 INFO L459 AbstractCegarLoop]: Abstraction has 444 states and 451 transitions. [2018-04-09 22:09:02,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-04-09 22:09:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 451 transitions. [2018-04-09 22:09:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-04-09 22:09:02,733 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:02,733 INFO L355 BasicCegarLoop]: trace histogram [27, 20, 20, 20, 20, 20, 20, 20, 20, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:02,733 INFO L408 AbstractCegarLoop]: === Iteration 31 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1121709856, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:02,739 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:02,804 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1016 proven. 100 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2018-04-09 22:09:03,078 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1016 proven. 100 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2018-04-09 22:09:03,483 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:03,483 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 40 [2018-04-09 22:09:03,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-04-09 22:09:03,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-04-09 22:09:03,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-04-09 22:09:03,485 INFO L87 Difference]: Start difference. First operand 444 states and 451 transitions. Second operand 40 states. [2018-04-09 22:09:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:04,081 INFO L93 Difference]: Finished difference Result 574 states and 586 transitions. [2018-04-09 22:09:04,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-09 22:09:04,082 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 341 [2018-04-09 22:09:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:04,083 INFO L225 Difference]: With dead ends: 574 [2018-04-09 22:09:04,083 INFO L226 Difference]: Without dead ends: 456 [2018-04-09 22:09:04,085 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 629 SyntacticMatches, 15 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=3904, Unknown=0, NotChecked=0, Total=4692 [2018-04-09 22:09:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2018-04-09 22:09:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 444. [2018-04-09 22:09:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2018-04-09 22:09:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 449 transitions. [2018-04-09 22:09:04,110 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 449 transitions. Word has length 341 [2018-04-09 22:09:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:04,111 INFO L459 AbstractCegarLoop]: Abstraction has 444 states and 449 transitions. [2018-04-09 22:09:04,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-04-09 22:09:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 449 transitions. [2018-04-09 22:09:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-04-09 22:09:04,113 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:04,114 INFO L355 BasicCegarLoop]: trace histogram [28, 21, 21, 21, 21, 21, 21, 21, 21, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:04,114 INFO L408 AbstractCegarLoop]: === Iteration 32 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1104547479, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:04,122 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:04,232 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2618 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-04-09 22:09:04,370 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2618 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-04-09 22:09:04,644 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:04,644 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-04-09 22:09:04,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-04-09 22:09:04,645 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-04-09 22:09:04,645 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2018-04-09 22:09:04,645 INFO L87 Difference]: Start difference. First operand 444 states and 449 transitions. Second operand 32 states. [2018-04-09 22:09:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:05,107 INFO L93 Difference]: Finished difference Result 554 states and 574 transitions. [2018-04-09 22:09:05,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-09 22:09:05,107 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 350 [2018-04-09 22:09:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:05,109 INFO L225 Difference]: With dead ends: 554 [2018-04-09 22:09:05,109 INFO L226 Difference]: Without dead ends: 532 [2018-04-09 22:09:05,110 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 669 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1155, Invalid=2385, Unknown=0, NotChecked=0, Total=3540 [2018-04-09 22:09:05,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2018-04-09 22:09:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 513. [2018-04-09 22:09:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-04-09 22:09:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 532 transitions. [2018-04-09 22:09:05,142 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 532 transitions. Word has length 350 [2018-04-09 22:09:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:05,143 INFO L459 AbstractCegarLoop]: Abstraction has 513 states and 532 transitions. [2018-04-09 22:09:05,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-04-09 22:09:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 532 transitions. [2018-04-09 22:09:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2018-04-09 22:09:05,146 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:05,146 INFO L355 BasicCegarLoop]: trace histogram [35, 28, 27, 27, 27, 27, 27, 27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:05,147 INFO L408 AbstractCegarLoop]: === Iteration 33 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:05,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1024297914, now seen corresponding path program 14 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:05,156 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:05,284 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4115 backedges. 1547 proven. 153 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-04-09 22:09:05,781 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4115 backedges. 1547 proven. 153 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-04-09 22:09:06,205 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:06,211 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 44 [2018-04-09 22:09:06,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-04-09 22:09:06,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-04-09 22:09:06,212 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1782, Unknown=0, NotChecked=0, Total=1980 [2018-04-09 22:09:06,212 INFO L87 Difference]: Start difference. First operand 513 states and 532 transitions. Second operand 45 states. [2018-04-09 22:09:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:07,324 INFO L93 Difference]: Finished difference Result 533 states and 557 transitions. [2018-04-09 22:09:07,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-09 22:09:07,325 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 404 [2018-04-09 22:09:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:07,327 INFO L225 Difference]: With dead ends: 533 [2018-04-09 22:09:07,327 INFO L226 Difference]: Without dead ends: 532 [2018-04-09 22:09:07,328 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 748 SyntacticMatches, 17 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=696, Invalid=5466, Unknown=0, NotChecked=0, Total=6162 [2018-04-09 22:09:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2018-04-09 22:09:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 513. [2018-04-09 22:09:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-04-09 22:09:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 531 transitions. [2018-04-09 22:09:07,352 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 531 transitions. Word has length 404 [2018-04-09 22:09:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:07,353 INFO L459 AbstractCegarLoop]: Abstraction has 513 states and 531 transitions. [2018-04-09 22:09:07,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-04-09 22:09:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 531 transitions. [2018-04-09 22:09:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-04-09 22:09:07,356 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:07,356 INFO L355 BasicCegarLoop]: trace histogram [35, 27, 27, 27, 27, 27, 27, 27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:07,356 INFO L408 AbstractCegarLoop]: === Iteration 34 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1659511949, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:07,367 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:07,485 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 1540 proven. 147 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2018-04-09 22:09:07,983 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4123 backedges. 1540 proven. 147 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2018-04-09 22:09:08,433 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:08,433 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 46 [2018-04-09 22:09:08,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-04-09 22:09:08,434 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-04-09 22:09:08,434 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2018-04-09 22:09:08,434 INFO L87 Difference]: Start difference. First operand 513 states and 531 transitions. Second operand 46 states. [2018-04-09 22:09:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:09,074 INFO L93 Difference]: Finished difference Result 704 states and 745 transitions. [2018-04-09 22:09:09,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-04-09 22:09:09,074 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 408 [2018-04-09 22:09:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:09,076 INFO L225 Difference]: With dead ends: 704 [2018-04-09 22:09:09,076 INFO L226 Difference]: Without dead ends: 529 [2018-04-09 22:09:09,078 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 755 SyntacticMatches, 17 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2266 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1038, Invalid=5282, Unknown=0, NotChecked=0, Total=6320 [2018-04-09 22:09:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2018-04-09 22:09:09,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 513. [2018-04-09 22:09:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-04-09 22:09:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 530 transitions. [2018-04-09 22:09:09,105 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 530 transitions. Word has length 408 [2018-04-09 22:09:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:09,106 INFO L459 AbstractCegarLoop]: Abstraction has 513 states and 530 transitions. [2018-04-09 22:09:09,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-04-09 22:09:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 530 transitions. [2018-04-09 22:09:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2018-04-09 22:09:09,109 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:09,109 INFO L355 BasicCegarLoop]: trace histogram [36, 29, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:09,109 INFO L408 AbstractCegarLoop]: === Iteration 35 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:09,110 INFO L82 PathProgramCache]: Analyzing trace with hash 45465067, now seen corresponding path program 15 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:09,119 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:09,213 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 1750 proven. 210 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-04-09 22:09:09,753 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 1750 proven. 210 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2018-04-09 22:09:10,160 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:10,160 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 49 [2018-04-09 22:09:10,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-04-09 22:09:10,161 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-04-09 22:09:10,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2018-04-09 22:09:10,161 INFO L87 Difference]: Start difference. First operand 513 states and 530 transitions. Second operand 49 states. [2018-04-09 22:09:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:11,253 INFO L93 Difference]: Finished difference Result 770 states and 803 transitions. [2018-04-09 22:09:11,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-04-09 22:09:11,296 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 413 [2018-04-09 22:09:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:11,299 INFO L225 Difference]: With dead ends: 770 [2018-04-09 22:09:11,299 INFO L226 Difference]: Without dead ends: 598 [2018-04-09 22:09:11,301 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 761 SyntacticMatches, 17 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1347, Invalid=7209, Unknown=0, NotChecked=0, Total=8556 [2018-04-09 22:09:11,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2018-04-09 22:09:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 587. [2018-04-09 22:09:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2018-04-09 22:09:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 603 transitions. [2018-04-09 22:09:11,329 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 603 transitions. Word has length 413 [2018-04-09 22:09:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:11,330 INFO L459 AbstractCegarLoop]: Abstraction has 587 states and 603 transitions. [2018-04-09 22:09:11,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-04-09 22:09:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 603 transitions. [2018-04-09 22:09:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2018-04-09 22:09:11,332 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:11,332 INFO L355 BasicCegarLoop]: trace histogram [36, 28, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:11,332 INFO L408 AbstractCegarLoop]: === Iteration 36 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:11,332 INFO L82 PathProgramCache]: Analyzing trace with hash 302484772, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:11,338 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:11,462 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:11,474 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 [2018-04-09 22:09:11,474 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:09:11,496 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:09:11,496 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:09:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-04-09 22:09:12,220 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-04-09 22:09:12,658 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:12,659 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2018-04-09 22:09:12,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-04-09 22:09:12,659 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-04-09 22:09:12,660 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2018-04-09 22:09:12,660 INFO L87 Difference]: Start difference. First operand 587 states and 603 transitions. Second operand 35 states. [2018-04-09 22:09:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:14,430 INFO L93 Difference]: Finished difference Result 599 states and 617 transitions. [2018-04-09 22:09:14,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-04-09 22:09:14,430 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 417 [2018-04-09 22:09:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:14,432 INFO L225 Difference]: With dead ends: 599 [2018-04-09 22:09:14,432 INFO L226 Difference]: Without dead ends: 598 [2018-04-09 22:09:14,433 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 785 SyntacticMatches, 15 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1299, Invalid=3531, Unknown=0, NotChecked=0, Total=4830 [2018-04-09 22:09:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2018-04-09 22:09:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 590. [2018-04-09 22:09:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2018-04-09 22:09:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 600 transitions. [2018-04-09 22:09:14,452 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 600 transitions. Word has length 417 [2018-04-09 22:09:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:14,453 INFO L459 AbstractCegarLoop]: Abstraction has 590 states and 600 transitions. [2018-04-09 22:09:14,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-04-09 22:09:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 600 transitions. [2018-04-09 22:09:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2018-04-09 22:09:14,457 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:14,457 INFO L355 BasicCegarLoop]: trace histogram [44, 36, 35, 35, 35, 35, 35, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:14,457 INFO L408 AbstractCegarLoop]: === Iteration 37 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash -814443753, now seen corresponding path program 16 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:14,466 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:14,566 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6668 backedges. 2300 proven. 210 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-04-09 22:09:15,034 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6668 backedges. 2300 proven. 210 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-04-09 22:09:15,559 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:15,559 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 50 [2018-04-09 22:09:15,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-04-09 22:09:15,560 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-04-09 22:09:15,560 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2018-04-09 22:09:15,561 INFO L87 Difference]: Start difference. First operand 590 states and 600 transitions. Second operand 51 states. [2018-04-09 22:09:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:16,940 INFO L93 Difference]: Finished difference Result 620 states and 637 transitions. [2018-04-09 22:09:16,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-04-09 22:09:16,978 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 496 [2018-04-09 22:09:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:16,981 INFO L225 Difference]: With dead ends: 620 [2018-04-09 22:09:16,981 INFO L226 Difference]: Without dead ends: 619 [2018-04-09 22:09:16,982 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1032 GetRequests, 925 SyntacticMatches, 19 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=865, Invalid=7145, Unknown=0, NotChecked=0, Total=8010 [2018-04-09 22:09:16,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2018-04-09 22:09:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 598. [2018-04-09 22:09:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2018-04-09 22:09:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 609 transitions. [2018-04-09 22:09:17,005 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 609 transitions. Word has length 496 [2018-04-09 22:09:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:17,005 INFO L459 AbstractCegarLoop]: Abstraction has 598 states and 609 transitions. [2018-04-09 22:09:17,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-04-09 22:09:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 609 transitions. [2018-04-09 22:09:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-04-09 22:09:17,009 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:17,009 INFO L355 BasicCegarLoop]: trace histogram [44, 36, 36, 35, 35, 35, 35, 35, 35, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:17,009 INFO L408 AbstractCegarLoop]: === Iteration 38 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:17,010 INFO L82 PathProgramCache]: Analyzing trace with hash 522047549, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:17,024 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:17,142 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:17,144 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 [2018-04-09 22:09:17,144 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:09:17,148 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:09:17,149 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:09:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6703 backedges. 2052 proven. 217 refuted. 0 times theorem prover too weak. 4434 trivial. 0 not checked. [2018-04-09 22:09:17,829 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6703 backedges. 2052 proven. 217 refuted. 0 times theorem prover too weak. 4434 trivial. 0 not checked. [2018-04-09 22:09:18,415 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:18,415 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2018-04-09 22:09:18,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-04-09 22:09:18,416 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-04-09 22:09:18,416 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2018-04-09 22:09:18,416 INFO L87 Difference]: Start difference. First operand 598 states and 609 transitions. Second operand 39 states. [2018-04-09 22:09:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:20,709 INFO L93 Difference]: Finished difference Result 694 states and 775 transitions. [2018-04-09 22:09:20,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-04-09 22:09:20,709 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 497 [2018-04-09 22:09:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:20,711 INFO L225 Difference]: With dead ends: 694 [2018-04-09 22:09:20,711 INFO L226 Difference]: Without dead ends: 693 [2018-04-09 22:09:20,712 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 949 SyntacticMatches, 15 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1574, Invalid=5232, Unknown=0, NotChecked=0, Total=6806 [2018-04-09 22:09:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2018-04-09 22:09:20,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 662. [2018-04-09 22:09:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2018-04-09 22:09:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 687 transitions. [2018-04-09 22:09:20,740 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 687 transitions. Word has length 497 [2018-04-09 22:09:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:20,741 INFO L459 AbstractCegarLoop]: Abstraction has 662 states and 687 transitions. [2018-04-09 22:09:20,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-04-09 22:09:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 687 transitions. [2018-04-09 22:09:20,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2018-04-09 22:09:20,744 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:20,745 INFO L355 BasicCegarLoop]: trace histogram [45, 37, 36, 36, 36, 36, 36, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:20,745 INFO L408 AbstractCegarLoop]: === Iteration 39 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:20,745 INFO L82 PathProgramCache]: Analyzing trace with hash -185290962, now seen corresponding path program 17 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:20,758 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:20,868 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7002 backedges. 2568 proven. 276 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-04-09 22:09:21,307 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7002 backedges. 2568 proven. 276 refuted. 0 times theorem prover too weak. 4158 trivial. 0 not checked. [2018-04-09 22:09:21,825 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:21,826 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 55 [2018-04-09 22:09:21,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-04-09 22:09:21,826 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-04-09 22:09:21,826 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2573, Unknown=0, NotChecked=0, Total=2970 [2018-04-09 22:09:21,827 INFO L87 Difference]: Start difference. First operand 662 states and 687 transitions. Second operand 55 states. [2018-04-09 22:09:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:22,969 INFO L93 Difference]: Finished difference Result 996 states and 1047 transitions. [2018-04-09 22:09:22,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-04-09 22:09:22,970 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 505 [2018-04-09 22:09:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:22,972 INFO L225 Difference]: With dead ends: 996 [2018-04-09 22:09:22,972 INFO L226 Difference]: Without dead ends: 758 [2018-04-09 22:09:22,974 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 937 SyntacticMatches, 19 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1688, Invalid=9232, Unknown=0, NotChecked=0, Total=10920 [2018-04-09 22:09:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2018-04-09 22:09:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 745. [2018-04-09 22:09:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2018-04-09 22:09:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 770 transitions. [2018-04-09 22:09:22,999 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 770 transitions. Word has length 505 [2018-04-09 22:09:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:23,000 INFO L459 AbstractCegarLoop]: Abstraction has 745 states and 770 transitions. [2018-04-09 22:09:23,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-04-09 22:09:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 770 transitions. [2018-04-09 22:09:23,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2018-04-09 22:09:23,004 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:23,005 INFO L355 BasicCegarLoop]: trace histogram [53, 44, 43, 43, 43, 43, 43, 43, 43, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:23,005 INFO L408 AbstractCegarLoop]: === Iteration 40 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:23,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1981672026, now seen corresponding path program 18 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:23,011 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:23,129 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9849 backedges. 5188 proven. 203 refuted. 0 times theorem prover too weak. 4458 trivial. 0 not checked. [2018-04-09 22:09:23,567 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9849 backedges. 5188 proven. 203 refuted. 0 times theorem prover too weak. 4458 trivial. 0 not checked. [2018-04-09 22:09:24,175 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:24,176 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 52 [2018-04-09 22:09:24,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-04-09 22:09:24,176 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-04-09 22:09:24,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2018-04-09 22:09:24,177 INFO L87 Difference]: Start difference. First operand 745 states and 770 transitions. Second operand 52 states. [2018-04-09 22:09:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:24,891 INFO L93 Difference]: Finished difference Result 1001 states and 1055 transitions. [2018-04-09 22:09:24,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-04-09 22:09:24,891 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 588 [2018-04-09 22:09:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:24,894 INFO L225 Difference]: With dead ends: 1001 [2018-04-09 22:09:24,894 INFO L226 Difference]: Without dead ends: 757 [2018-04-09 22:09:24,896 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1215 GetRequests, 1107 SyntacticMatches, 19 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1322, Invalid=6868, Unknown=0, NotChecked=0, Total=8190 [2018-04-09 22:09:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2018-04-09 22:09:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 745. [2018-04-09 22:09:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2018-04-09 22:09:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 768 transitions. [2018-04-09 22:09:24,949 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 768 transitions. Word has length 588 [2018-04-09 22:09:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:24,950 INFO L459 AbstractCegarLoop]: Abstraction has 745 states and 768 transitions. [2018-04-09 22:09:24,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-04-09 22:09:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 768 transitions. [2018-04-09 22:09:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2018-04-09 22:09:24,954 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:24,954 INFO L355 BasicCegarLoop]: trace histogram [54, 45, 44, 44, 44, 44, 44, 44, 44, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:24,954 INFO L408 AbstractCegarLoop]: === Iteration 41 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1138665999, now seen corresponding path program 19 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:24,962 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:25,070 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10257 backedges. 3267 proven. 276 refuted. 0 times theorem prover too weak. 6714 trivial. 0 not checked. [2018-04-09 22:09:25,606 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10257 backedges. 3267 proven. 276 refuted. 0 times theorem prover too weak. 6714 trivial. 0 not checked. [2018-04-09 22:09:26,268 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:26,268 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 56 [2018-04-09 22:09:26,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-04-09 22:09:26,269 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-04-09 22:09:26,269 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2018-04-09 22:09:26,270 INFO L87 Difference]: Start difference. First operand 745 states and 768 transitions. Second operand 57 states. [2018-04-09 22:09:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:27,977 INFO L93 Difference]: Finished difference Result 761 states and 788 transitions. [2018-04-09 22:09:27,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-04-09 22:09:27,996 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 597 [2018-04-09 22:09:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:27,998 INFO L225 Difference]: With dead ends: 761 [2018-04-09 22:09:27,998 INFO L226 Difference]: Without dead ends: 760 [2018-04-09 22:09:27,999 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1238 GetRequests, 1118 SyntacticMatches, 21 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3022 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1051, Invalid=9049, Unknown=0, NotChecked=0, Total=10100 [2018-04-09 22:09:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2018-04-09 22:09:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 745. [2018-04-09 22:09:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2018-04-09 22:09:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 767 transitions. [2018-04-09 22:09:28,026 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 767 transitions. Word has length 597 [2018-04-09 22:09:28,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:28,026 INFO L459 AbstractCegarLoop]: Abstraction has 745 states and 767 transitions. [2018-04-09 22:09:28,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-04-09 22:09:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 767 transitions. [2018-04-09 22:09:28,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2018-04-09 22:09:28,029 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:28,029 INFO L355 BasicCegarLoop]: trace histogram [55, 46, 45, 45, 45, 45, 45, 45, 45, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:28,029 INFO L408 AbstractCegarLoop]: === Iteration 42 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:28,029 INFO L82 PathProgramCache]: Analyzing trace with hash 940343700, now seen corresponding path program 20 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:28,035 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:28,137 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10674 backedges. 3609 proven. 351 refuted. 0 times theorem prover too weak. 6714 trivial. 0 not checked. [2018-04-09 22:09:28,694 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10674 backedges. 3609 proven. 351 refuted. 0 times theorem prover too weak. 6714 trivial. 0 not checked. [2018-04-09 22:09:29,324 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:29,325 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 61 [2018-04-09 22:09:29,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-04-09 22:09:29,325 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-04-09 22:09:29,326 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2018-04-09 22:09:29,326 INFO L87 Difference]: Start difference. First operand 745 states and 767 transitions. Second operand 61 states. [2018-04-09 22:09:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:30,885 INFO L93 Difference]: Finished difference Result 1079 states and 1124 transitions. [2018-04-09 22:09:30,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-04-09 22:09:30,885 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 606 [2018-04-09 22:09:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:30,887 INFO L225 Difference]: With dead ends: 1079 [2018-04-09 22:09:30,887 INFO L226 Difference]: Without dead ends: 850 [2018-04-09 22:09:30,889 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1267 GetRequests, 1131 SyntacticMatches, 21 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2067, Invalid=11505, Unknown=0, NotChecked=0, Total=13572 [2018-04-09 22:09:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2018-04-09 22:09:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 837. [2018-04-09 22:09:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2018-04-09 22:09:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 859 transitions. [2018-04-09 22:09:30,921 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 859 transitions. Word has length 606 [2018-04-09 22:09:30,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:30,921 INFO L459 AbstractCegarLoop]: Abstraction has 837 states and 859 transitions. [2018-04-09 22:09:30,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-04-09 22:09:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 859 transitions. [2018-04-09 22:09:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2018-04-09 22:09:30,924 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:30,925 INFO L355 BasicCegarLoop]: trace histogram [64, 54, 53, 53, 53, 53, 53, 53, 53, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:30,925 INFO L408 AbstractCegarLoop]: === Iteration 43 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -942309199, now seen corresponding path program 21 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:30,930 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:31,049 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14631 backedges. 7271 proven. 268 refuted. 0 times theorem prover too weak. 7092 trivial. 0 not checked. [2018-04-09 22:09:31,623 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14631 backedges. 7271 proven. 268 refuted. 0 times theorem prover too weak. 7092 trivial. 0 not checked. [2018-04-09 22:09:32,372 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:32,373 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 58 [2018-04-09 22:09:32,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-04-09 22:09:32,373 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-04-09 22:09:32,374 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=2850, Unknown=0, NotChecked=0, Total=3306 [2018-04-09 22:09:32,374 INFO L87 Difference]: Start difference. First operand 837 states and 859 transitions. Second operand 58 states. [2018-04-09 22:09:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:33,362 INFO L93 Difference]: Finished difference Result 1084 states and 1131 transitions. [2018-04-09 22:09:33,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-04-09 22:09:33,362 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 698 [2018-04-09 22:09:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:33,364 INFO L225 Difference]: With dead ends: 1084 [2018-04-09 22:09:33,365 INFO L226 Difference]: Without dead ends: 849 [2018-04-09 22:09:33,366 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1440 GetRequests, 1319 SyntacticMatches, 21 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1640, Invalid=8662, Unknown=0, NotChecked=0, Total=10302 [2018-04-09 22:09:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2018-04-09 22:09:33,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 837. [2018-04-09 22:09:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2018-04-09 22:09:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 857 transitions. [2018-04-09 22:09:33,392 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 857 transitions. Word has length 698 [2018-04-09 22:09:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:33,392 INFO L459 AbstractCegarLoop]: Abstraction has 837 states and 857 transitions. [2018-04-09 22:09:33,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-04-09 22:09:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 857 transitions. [2018-04-09 22:09:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2018-04-09 22:09:33,395 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:33,395 INFO L355 BasicCegarLoop]: trace histogram [65, 55, 54, 54, 54, 54, 54, 54, 54, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:33,395 INFO L408 AbstractCegarLoop]: === Iteration 44 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:33,396 INFO L82 PathProgramCache]: Analyzing trace with hash 786597614, now seen corresponding path program 22 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:33,402 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:33,524 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15131 backedges. 4475 proven. 351 refuted. 0 times theorem prover too weak. 10305 trivial. 0 not checked. [2018-04-09 22:09:34,190 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15131 backedges. 4475 proven. 351 refuted. 0 times theorem prover too weak. 10305 trivial. 0 not checked. [2018-04-09 22:09:34,998 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:34,999 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 62 [2018-04-09 22:09:35,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-04-09 22:09:35,000 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-04-09 22:09:35,000 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=3564, Unknown=0, NotChecked=0, Total=3906 [2018-04-09 22:09:35,000 INFO L87 Difference]: Start difference. First operand 837 states and 857 transitions. Second operand 63 states. [2018-04-09 22:09:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:37,024 INFO L93 Difference]: Finished difference Result 853 states and 876 transitions. [2018-04-09 22:09:37,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-04-09 22:09:37,024 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 707 [2018-04-09 22:09:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:37,028 INFO L225 Difference]: With dead ends: 853 [2018-04-09 22:09:37,028 INFO L226 Difference]: Without dead ends: 852 [2018-04-09 22:09:37,030 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1463 GetRequests, 1330 SyntacticMatches, 23 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1254, Invalid=11178, Unknown=0, NotChecked=0, Total=12432 [2018-04-09 22:09:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2018-04-09 22:09:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 837. [2018-04-09 22:09:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 837 states. [2018-04-09 22:09:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 856 transitions. [2018-04-09 22:09:37,068 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 856 transitions. Word has length 707 [2018-04-09 22:09:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:37,068 INFO L459 AbstractCegarLoop]: Abstraction has 837 states and 856 transitions. [2018-04-09 22:09:37,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-04-09 22:09:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 856 transitions. [2018-04-09 22:09:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2018-04-09 22:09:37,071 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:37,072 INFO L355 BasicCegarLoop]: trace histogram [66, 56, 55, 55, 55, 55, 55, 55, 55, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:37,072 INFO L408 AbstractCegarLoop]: === Iteration 45 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:37,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2143937225, now seen corresponding path program 23 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:37,078 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:37,216 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15640 backedges. 4900 proven. 435 refuted. 0 times theorem prover too weak. 10305 trivial. 0 not checked. [2018-04-09 22:09:37,874 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15640 backedges. 4900 proven. 435 refuted. 0 times theorem prover too weak. 10305 trivial. 0 not checked. [2018-04-09 22:09:38,669 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:38,679 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 67 [2018-04-09 22:09:38,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-09 22:09:38,680 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-09 22:09:38,680 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2018-04-09 22:09:38,680 INFO L87 Difference]: Start difference. First operand 837 states and 856 transitions. Second operand 67 states. [2018-04-09 22:09:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:40,254 INFO L93 Difference]: Finished difference Result 1171 states and 1210 transitions. [2018-04-09 22:09:40,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-04-09 22:09:40,255 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 716 [2018-04-09 22:09:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:40,257 INFO L225 Difference]: With dead ends: 1171 [2018-04-09 22:09:40,257 INFO L226 Difference]: Without dead ends: 951 [2018-04-09 22:09:40,259 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1343 SyntacticMatches, 23 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2484, Invalid=14028, Unknown=0, NotChecked=0, Total=16512 [2018-04-09 22:09:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2018-04-09 22:09:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 938. [2018-04-09 22:09:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2018-04-09 22:09:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 957 transitions. [2018-04-09 22:09:40,290 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 957 transitions. Word has length 716 [2018-04-09 22:09:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:40,291 INFO L459 AbstractCegarLoop]: Abstraction has 938 states and 957 transitions. [2018-04-09 22:09:40,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-09 22:09:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 957 transitions. [2018-04-09 22:09:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2018-04-09 22:09:40,298 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:40,298 INFO L355 BasicCegarLoop]: trace histogram [76, 65, 64, 64, 64, 64, 64, 64, 64, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:40,298 INFO L408 AbstractCegarLoop]: === Iteration 46 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:40,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2079259375, now seen corresponding path program 24 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:40,305 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:40,445 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20965 backedges. 9853 proven. 342 refuted. 0 times theorem prover too weak. 10770 trivial. 0 not checked. [2018-04-09 22:09:41,152 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20965 backedges. 9853 proven. 342 refuted. 0 times theorem prover too weak. 10770 trivial. 0 not checked. [2018-04-09 22:09:42,071 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:42,071 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 64 [2018-04-09 22:09:42,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-09 22:09:42,072 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-09 22:09:42,072 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=3486, Unknown=0, NotChecked=0, Total=4032 [2018-04-09 22:09:42,072 INFO L87 Difference]: Start difference. First operand 938 states and 957 transitions. Second operand 64 states. [2018-04-09 22:09:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:43,438 INFO L93 Difference]: Finished difference Result 1176 states and 1216 transitions. [2018-04-09 22:09:43,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-04-09 22:09:43,439 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 817 [2018-04-09 22:09:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:43,442 INFO L225 Difference]: With dead ends: 1176 [2018-04-09 22:09:43,442 INFO L226 Difference]: Without dead ends: 950 [2018-04-09 22:09:43,443 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1683 GetRequests, 1549 SyntacticMatches, 23 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4780 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1992, Invalid=10664, Unknown=0, NotChecked=0, Total=12656 [2018-04-09 22:09:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2018-04-09 22:09:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 938. [2018-04-09 22:09:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2018-04-09 22:09:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 955 transitions. [2018-04-09 22:09:43,477 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 955 transitions. Word has length 817 [2018-04-09 22:09:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:43,477 INFO L459 AbstractCegarLoop]: Abstraction has 938 states and 955 transitions. [2018-04-09 22:09:43,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-09 22:09:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 955 transitions. [2018-04-09 22:09:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2018-04-09 22:09:43,482 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:43,483 INFO L355 BasicCegarLoop]: trace histogram [77, 66, 65, 65, 65, 65, 65, 65, 65, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:43,483 INFO L408 AbstractCegarLoop]: === Iteration 47 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:43,483 INFO L82 PathProgramCache]: Analyzing trace with hash 451558298, now seen corresponding path program 25 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:43,493 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:43,671 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21566 backedges. 5951 proven. 435 refuted. 0 times theorem prover too weak. 15180 trivial. 0 not checked. [2018-04-09 22:09:44,547 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21566 backedges. 5951 proven. 435 refuted. 0 times theorem prover too weak. 15180 trivial. 0 not checked. [2018-04-09 22:09:45,534 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:45,535 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 68 [2018-04-09 22:09:45,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-04-09 22:09:45,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-04-09 22:09:45,536 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=4294, Unknown=0, NotChecked=0, Total=4692 [2018-04-09 22:09:45,536 INFO L87 Difference]: Start difference. First operand 938 states and 955 transitions. Second operand 69 states. [2018-04-09 22:09:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:47,895 INFO L93 Difference]: Finished difference Result 954 states and 973 transitions. [2018-04-09 22:09:47,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-04-09 22:09:47,895 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 826 [2018-04-09 22:09:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:47,897 INFO L225 Difference]: With dead ends: 954 [2018-04-09 22:09:47,897 INFO L226 Difference]: Without dead ends: 953 [2018-04-09 22:09:47,898 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1706 GetRequests, 1560 SyntacticMatches, 25 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4583 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1474, Invalid=13532, Unknown=0, NotChecked=0, Total=15006 [2018-04-09 22:09:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2018-04-09 22:09:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 938. [2018-04-09 22:09:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2018-04-09 22:09:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 954 transitions. [2018-04-09 22:09:47,928 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 954 transitions. Word has length 826 [2018-04-09 22:09:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:47,928 INFO L459 AbstractCegarLoop]: Abstraction has 938 states and 954 transitions. [2018-04-09 22:09:47,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-04-09 22:09:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 954 transitions. [2018-04-09 22:09:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2018-04-09 22:09:47,933 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:47,933 INFO L355 BasicCegarLoop]: trace histogram [78, 67, 66, 66, 66, 66, 66, 66, 66, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:47,933 INFO L408 AbstractCegarLoop]: === Iteration 48 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash -252646901, now seen corresponding path program 26 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:47,939 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:48,081 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22176 backedges. 6468 proven. 528 refuted. 0 times theorem prover too weak. 15180 trivial. 0 not checked. [2018-04-09 22:09:48,897 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22176 backedges. 6468 proven. 528 refuted. 0 times theorem prover too weak. 15180 trivial. 0 not checked. [2018-04-09 22:09:49,885 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:49,886 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 73 [2018-04-09 22:09:49,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-09 22:09:49,887 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-09 22:09:49,887 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=4583, Unknown=0, NotChecked=0, Total=5256 [2018-04-09 22:09:49,887 INFO L87 Difference]: Start difference. First operand 938 states and 954 transitions. Second operand 73 states. [2018-04-09 22:09:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:51,950 INFO L93 Difference]: Finished difference Result 1272 states and 1305 transitions. [2018-04-09 22:09:51,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-04-09 22:09:51,951 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 835 [2018-04-09 22:09:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:51,953 INFO L225 Difference]: With dead ends: 1272 [2018-04-09 22:09:51,953 INFO L226 Difference]: Without dead ends: 1061 [2018-04-09 22:09:51,955 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1737 GetRequests, 1573 SyntacticMatches, 25 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5255 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2939, Invalid=16801, Unknown=0, NotChecked=0, Total=19740 [2018-04-09 22:09:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2018-04-09 22:09:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1048. [2018-04-09 22:09:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-04-09 22:09:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1064 transitions. [2018-04-09 22:09:51,989 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1064 transitions. Word has length 835 [2018-04-09 22:09:51,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:51,990 INFO L459 AbstractCegarLoop]: Abstraction has 1048 states and 1064 transitions. [2018-04-09 22:09:51,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-09 22:09:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1064 transitions. [2018-04-09 22:09:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 946 [2018-04-09 22:09:51,995 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:51,995 INFO L355 BasicCegarLoop]: trace histogram [89, 77, 76, 76, 76, 76, 76, 76, 76, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:51,995 INFO L408 AbstractCegarLoop]: === Iteration 49 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:51,996 INFO L82 PathProgramCache]: Analyzing trace with hash -5984184, now seen corresponding path program 27 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:52,001 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:52,162 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 29154 backedges. 12988 proven. 425 refuted. 0 times theorem prover too weak. 15741 trivial. 0 not checked. [2018-04-09 22:09:53,023 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 29154 backedges. 12988 proven. 425 refuted. 0 times theorem prover too weak. 15741 trivial. 0 not checked. [2018-04-09 22:09:54,094 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:54,095 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 70 [2018-04-09 22:09:54,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-04-09 22:09:54,096 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-04-09 22:09:54,096 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=4186, Unknown=0, NotChecked=0, Total=4830 [2018-04-09 22:09:54,096 INFO L87 Difference]: Start difference. First operand 1048 states and 1064 transitions. Second operand 70 states. [2018-04-09 22:09:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:09:55,361 INFO L93 Difference]: Finished difference Result 1277 states and 1310 transitions. [2018-04-09 22:09:55,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-04-09 22:09:55,397 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 945 [2018-04-09 22:09:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:09:55,400 INFO L225 Difference]: With dead ends: 1277 [2018-04-09 22:09:55,400 INFO L226 Difference]: Without dead ends: 1060 [2018-04-09 22:09:55,402 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1944 GetRequests, 1797 SyntacticMatches, 25 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5824 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2378, Invalid=12874, Unknown=0, NotChecked=0, Total=15252 [2018-04-09 22:09:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2018-04-09 22:09:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1048. [2018-04-09 22:09:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-04-09 22:09:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1062 transitions. [2018-04-09 22:09:55,435 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1062 transitions. Word has length 945 [2018-04-09 22:09:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:09:55,435 INFO L459 AbstractCegarLoop]: Abstraction has 1048 states and 1062 transitions. [2018-04-09 22:09:55,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-04-09 22:09:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1062 transitions. [2018-04-09 22:09:55,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2018-04-09 22:09:55,453 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:09:55,453 INFO L355 BasicCegarLoop]: trace histogram [90, 78, 77, 77, 77, 77, 77, 77, 77, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:09:55,453 INFO L408 AbstractCegarLoop]: === Iteration 50 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:09:55,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1308500297, now seen corresponding path program 28 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:09:55,460 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:09:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:09:55,622 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:09:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 29865 backedges. 7722 proven. 528 refuted. 0 times theorem prover too weak. 21615 trivial. 0 not checked. [2018-04-09 22:09:56,609 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:09:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 29865 backedges. 7722 proven. 528 refuted. 0 times theorem prover too weak. 21615 trivial. 0 not checked. [2018-04-09 22:09:57,866 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:09:57,867 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 74 [2018-04-09 22:09:57,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-04-09 22:09:57,868 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-04-09 22:09:57,868 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=5092, Unknown=0, NotChecked=0, Total=5550 [2018-04-09 22:09:57,868 INFO L87 Difference]: Start difference. First operand 1048 states and 1062 transitions. Second operand 75 states. [2018-04-09 22:10:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:00,431 INFO L93 Difference]: Finished difference Result 1064 states and 1079 transitions. [2018-04-09 22:10:00,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-04-09 22:10:00,431 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 954 [2018-04-09 22:10:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:00,433 INFO L225 Difference]: With dead ends: 1064 [2018-04-09 22:10:00,434 INFO L226 Difference]: Without dead ends: 1063 [2018-04-09 22:10:00,435 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1808 SyntacticMatches, 27 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5485 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1711, Invalid=16111, Unknown=0, NotChecked=0, Total=17822 [2018-04-09 22:10:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2018-04-09 22:10:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1048. [2018-04-09 22:10:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2018-04-09 22:10:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1061 transitions. [2018-04-09 22:10:00,468 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1061 transitions. Word has length 954 [2018-04-09 22:10:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:00,469 INFO L459 AbstractCegarLoop]: Abstraction has 1048 states and 1061 transitions. [2018-04-09 22:10:00,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-04-09 22:10:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1061 transitions. [2018-04-09 22:10:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2018-04-09 22:10:00,474 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:00,475 INFO L355 BasicCegarLoop]: trace histogram [91, 79, 78, 78, 78, 78, 78, 78, 78, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:00,475 INFO L408 AbstractCegarLoop]: === Iteration 51 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:00,475 INFO L82 PathProgramCache]: Analyzing trace with hash -753764466, now seen corresponding path program 29 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:00,481 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:00,646 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30585 backedges. 8340 proven. 630 refuted. 0 times theorem prover too weak. 21615 trivial. 0 not checked. [2018-04-09 22:10:01,627 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30585 backedges. 8340 proven. 630 refuted. 0 times theorem prover too weak. 21615 trivial. 0 not checked. [2018-04-09 22:10:02,790 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:02,791 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 79 [2018-04-09 22:10:02,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-04-09 22:10:02,792 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-04-09 22:10:02,792 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=5381, Unknown=0, NotChecked=0, Total=6162 [2018-04-09 22:10:02,792 INFO L87 Difference]: Start difference. First operand 1048 states and 1061 transitions. Second operand 79 states. [2018-04-09 22:10:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:04,998 INFO L93 Difference]: Finished difference Result 1382 states and 1409 transitions. [2018-04-09 22:10:04,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-04-09 22:10:04,998 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 963 [2018-04-09 22:10:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:05,001 INFO L225 Difference]: With dead ends: 1382 [2018-04-09 22:10:05,001 INFO L226 Difference]: Without dead ends: 1180 [2018-04-09 22:10:05,003 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1999 GetRequests, 1821 SyntacticMatches, 27 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6243 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3432, Invalid=19824, Unknown=0, NotChecked=0, Total=23256 [2018-04-09 22:10:05,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2018-04-09 22:10:05,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1167. [2018-04-09 22:10:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2018-04-09 22:10:05,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1180 transitions. [2018-04-09 22:10:05,041 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1180 transitions. Word has length 963 [2018-04-09 22:10:05,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:05,042 INFO L459 AbstractCegarLoop]: Abstraction has 1167 states and 1180 transitions. [2018-04-09 22:10:05,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-04-09 22:10:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1180 transitions. [2018-04-09 22:10:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1083 [2018-04-09 22:10:05,048 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:05,049 INFO L355 BasicCegarLoop]: trace histogram [103, 90, 89, 89, 89, 89, 89, 89, 89, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:05,049 INFO L408 AbstractCegarLoop]: === Iteration 52 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:05,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1792234438, now seen corresponding path program 30 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:05,056 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:05,243 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 39528 backedges. 16730 proven. 517 refuted. 0 times theorem prover too weak. 22281 trivial. 0 not checked. [2018-04-09 22:10:06,330 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 39528 backedges. 16730 proven. 517 refuted. 0 times theorem prover too weak. 22281 trivial. 0 not checked. [2018-04-09 22:10:07,834 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:07,835 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 76 [2018-04-09 22:10:07,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-04-09 22:10:07,836 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-04-09 22:10:07,837 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=4950, Unknown=0, NotChecked=0, Total=5700 [2018-04-09 22:10:07,837 INFO L87 Difference]: Start difference. First operand 1167 states and 1180 transitions. Second operand 76 states. [2018-04-09 22:10:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:09,180 INFO L93 Difference]: Finished difference Result 1387 states and 1413 transitions. [2018-04-09 22:10:09,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-04-09 22:10:09,180 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 1082 [2018-04-09 22:10:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:09,183 INFO L225 Difference]: With dead ends: 1387 [2018-04-09 22:10:09,183 INFO L226 Difference]: Without dead ends: 1179 [2018-04-09 22:10:09,184 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2223 GetRequests, 2063 SyntacticMatches, 27 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6971 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2798, Invalid=15292, Unknown=0, NotChecked=0, Total=18090 [2018-04-09 22:10:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2018-04-09 22:10:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1167. [2018-04-09 22:10:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2018-04-09 22:10:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1178 transitions. [2018-04-09 22:10:09,221 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1178 transitions. Word has length 1082 [2018-04-09 22:10:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:09,222 INFO L459 AbstractCegarLoop]: Abstraction has 1167 states and 1178 transitions. [2018-04-09 22:10:09,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-04-09 22:10:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1178 transitions. [2018-04-09 22:10:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1092 [2018-04-09 22:10:09,228 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:09,229 INFO L355 BasicCegarLoop]: trace histogram [104, 91, 90, 90, 90, 90, 90, 90, 90, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:09,229 INFO L408 AbstractCegarLoop]: === Iteration 53 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1511576849, now seen corresponding path program 31 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:09,235 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:09,418 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 40358 backedges. 9815 proven. 630 refuted. 0 times theorem prover too weak. 29913 trivial. 0 not checked. [2018-04-09 22:10:10,583 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40358 backedges. 9815 proven. 630 refuted. 0 times theorem prover too weak. 29913 trivial. 0 not checked. [2018-04-09 22:10:11,985 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:11,997 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 80 [2018-04-09 22:10:11,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-04-09 22:10:11,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-04-09 22:10:11,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=5958, Unknown=0, NotChecked=0, Total=6480 [2018-04-09 22:10:11,999 INFO L87 Difference]: Start difference. First operand 1167 states and 1178 transitions. Second operand 81 states. [2018-04-09 22:10:14,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:14,954 INFO L93 Difference]: Finished difference Result 1183 states and 1194 transitions. [2018-04-09 22:10:14,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-04-09 22:10:14,955 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 1091 [2018-04-09 22:10:14,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:14,958 INFO L225 Difference]: With dead ends: 1183 [2018-04-09 22:10:14,958 INFO L226 Difference]: Without dead ends: 1182 [2018-04-09 22:10:14,959 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2246 GetRequests, 2074 SyntacticMatches, 29 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6468 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1965, Invalid=18915, Unknown=0, NotChecked=0, Total=20880 [2018-04-09 22:10:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2018-04-09 22:10:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1167. [2018-04-09 22:10:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1167 states. [2018-04-09 22:10:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1177 transitions. [2018-04-09 22:10:14,997 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1177 transitions. Word has length 1091 [2018-04-09 22:10:14,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:14,997 INFO L459 AbstractCegarLoop]: Abstraction has 1167 states and 1177 transitions. [2018-04-09 22:10:14,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-04-09 22:10:14,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1177 transitions. [2018-04-09 22:10:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1101 [2018-04-09 22:10:15,004 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:15,004 INFO L355 BasicCegarLoop]: trace histogram [105, 92, 91, 91, 91, 91, 91, 91, 91, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:15,004 INFO L408 AbstractCegarLoop]: === Iteration 54 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:15,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1480722036, now seen corresponding path program 32 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:15,011 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:15,198 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 41197 backedges. 10543 proven. 741 refuted. 0 times theorem prover too weak. 29913 trivial. 0 not checked. [2018-04-09 22:10:16,372 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 41197 backedges. 10543 proven. 741 refuted. 0 times theorem prover too weak. 29913 trivial. 0 not checked. [2018-04-09 22:10:17,746 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:17,746 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 85 [2018-04-09 22:10:17,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-04-09 22:10:17,747 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-04-09 22:10:17,747 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=6243, Unknown=0, NotChecked=0, Total=7140 [2018-04-09 22:10:17,747 INFO L87 Difference]: Start difference. First operand 1167 states and 1177 transitions. Second operand 85 states. [2018-04-09 22:10:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:20,216 INFO L93 Difference]: Finished difference Result 1501 states and 1522 transitions. [2018-04-09 22:10:20,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-04-09 22:10:20,216 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 1100 [2018-04-09 22:10:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:20,219 INFO L225 Difference]: With dead ends: 1501 [2018-04-09 22:10:20,219 INFO L226 Difference]: Without dead ends: 1308 [2018-04-09 22:10:20,222 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2279 GetRequests, 2087 SyntacticMatches, 29 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7316 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3963, Invalid=23097, Unknown=0, NotChecked=0, Total=27060 [2018-04-09 22:10:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2018-04-09 22:10:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1295. [2018-04-09 22:10:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1295 states. [2018-04-09 22:10:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1305 transitions. [2018-04-09 22:10:20,264 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1305 transitions. Word has length 1100 [2018-04-09 22:10:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:20,264 INFO L459 AbstractCegarLoop]: Abstraction has 1295 states and 1305 transitions. [2018-04-09 22:10:20,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-04-09 22:10:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1305 transitions. [2018-04-09 22:10:20,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2018-04-09 22:10:20,272 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:20,272 INFO L355 BasicCegarLoop]: trace histogram [118, 104, 103, 103, 103, 103, 103, 103, 103, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:20,273 INFO L408 AbstractCegarLoop]: === Iteration 55 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash -869376943, now seen corresponding path program 33 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:20,281 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:20,501 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 52444 backedges. 21133 proven. 618 refuted. 0 times theorem prover too weak. 30693 trivial. 0 not checked. [2018-04-09 22:10:21,748 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 52444 backedges. 21133 proven. 618 refuted. 0 times theorem prover too weak. 30693 trivial. 0 not checked. [2018-04-09 22:10:23,265 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:23,276 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 82 [2018-04-09 22:10:23,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-04-09 22:10:23,277 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-04-09 22:10:23,277 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=5778, Unknown=0, NotChecked=0, Total=6642 [2018-04-09 22:10:23,277 INFO L87 Difference]: Start difference. First operand 1295 states and 1305 transitions. Second operand 82 states. [2018-04-09 22:10:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:24,614 INFO L93 Difference]: Finished difference Result 1506 states and 1525 transitions. [2018-04-09 22:10:24,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-04-09 22:10:24,614 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 1228 [2018-04-09 22:10:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:24,617 INFO L225 Difference]: With dead ends: 1506 [2018-04-09 22:10:24,617 INFO L226 Difference]: Without dead ends: 1307 [2018-04-09 22:10:24,619 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2520 GetRequests, 2347 SyntacticMatches, 29 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8221 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3252, Invalid=17918, Unknown=0, NotChecked=0, Total=21170 [2018-04-09 22:10:24,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2018-04-09 22:10:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1295. [2018-04-09 22:10:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1295 states. [2018-04-09 22:10:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1303 transitions. [2018-04-09 22:10:24,661 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1303 transitions. Word has length 1228 [2018-04-09 22:10:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:24,661 INFO L459 AbstractCegarLoop]: Abstraction has 1295 states and 1303 transitions. [2018-04-09 22:10:24,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-04-09 22:10:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1303 transitions. [2018-04-09 22:10:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1238 [2018-04-09 22:10:24,670 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:24,670 INFO L355 BasicCegarLoop]: trace histogram [119, 105, 104, 104, 104, 104, 104, 104, 104, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:24,670 INFO L408 AbstractCegarLoop]: === Iteration 56 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:24,670 INFO L82 PathProgramCache]: Analyzing trace with hash 253114958, now seen corresponding path program 34 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:24,676 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:24,885 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 53402 backedges. 12257 proven. 741 refuted. 0 times theorem prover too weak. 40404 trivial. 0 not checked. [2018-04-09 22:10:26,305 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 53402 backedges. 12257 proven. 741 refuted. 0 times theorem prover too weak. 40404 trivial. 0 not checked. [2018-04-09 22:10:27,964 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:27,965 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 86 [2018-04-09 22:10:27,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-04-09 22:10:27,966 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-04-09 22:10:27,966 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=6892, Unknown=0, NotChecked=0, Total=7482 [2018-04-09 22:10:27,966 INFO L87 Difference]: Start difference. First operand 1295 states and 1303 transitions. Second operand 87 states. [2018-04-09 22:10:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:31,135 INFO L93 Difference]: Finished difference Result 1311 states and 1318 transitions. [2018-04-09 22:10:31,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-04-09 22:10:31,136 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 1237 [2018-04-09 22:10:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:31,139 INFO L225 Difference]: With dead ends: 1311 [2018-04-09 22:10:31,139 INFO L226 Difference]: Without dead ends: 1310 [2018-04-09 22:10:31,141 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2543 GetRequests, 2358 SyntacticMatches, 31 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7532 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2236, Invalid=21944, Unknown=0, NotChecked=0, Total=24180 [2018-04-09 22:10:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2018-04-09 22:10:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1295. [2018-04-09 22:10:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1295 states. [2018-04-09 22:10:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1302 transitions. [2018-04-09 22:10:31,183 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1302 transitions. Word has length 1237 [2018-04-09 22:10:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:31,184 INFO L459 AbstractCegarLoop]: Abstraction has 1295 states and 1302 transitions. [2018-04-09 22:10:31,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-04-09 22:10:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1302 transitions. [2018-04-09 22:10:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1247 [2018-04-09 22:10:31,196 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:31,196 INFO L355 BasicCegarLoop]: trace histogram [120, 106, 105, 105, 105, 105, 105, 105, 105, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:31,196 INFO L408 AbstractCegarLoop]: === Iteration 57 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:31,196 INFO L82 PathProgramCache]: Analyzing trace with hash 520500695, now seen corresponding path program 35 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:31,202 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:31,414 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 54369 backedges. 13104 proven. 861 refuted. 0 times theorem prover too weak. 40404 trivial. 0 not checked. [2018-04-09 22:10:32,818 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 54369 backedges. 13104 proven. 861 refuted. 0 times theorem prover too weak. 40404 trivial. 0 not checked. [2018-04-09 22:10:34,370 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:34,370 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 91 [2018-04-09 22:10:34,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-04-09 22:10:34,371 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-04-09 22:10:34,372 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=7169, Unknown=0, NotChecked=0, Total=8190 [2018-04-09 22:10:34,372 INFO L87 Difference]: Start difference. First operand 1295 states and 1302 transitions. Second operand 91 states. [2018-04-09 22:10:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:37,165 INFO L93 Difference]: Finished difference Result 1632 states and 1647 transitions. [2018-04-09 22:10:37,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-04-09 22:10:37,165 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 1246 [2018-04-09 22:10:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:37,169 INFO L225 Difference]: With dead ends: 1632 [2018-04-09 22:10:37,170 INFO L226 Difference]: Without dead ends: 1448 [2018-04-09 22:10:37,174 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2577 GetRequests, 2371 SyntacticMatches, 31 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8474 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4532, Invalid=26620, Unknown=0, NotChecked=0, Total=31152 [2018-04-09 22:10:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2018-04-09 22:10:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1432. [2018-04-09 22:10:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-04-09 22:10:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1439 transitions. [2018-04-09 22:10:37,224 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1439 transitions. Word has length 1246 [2018-04-09 22:10:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:37,225 INFO L459 AbstractCegarLoop]: Abstraction has 1432 states and 1439 transitions. [2018-04-09 22:10:37,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-04-09 22:10:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1439 transitions. [2018-04-09 22:10:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1258 [2018-04-09 22:10:37,233 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:37,233 INFO L355 BasicCegarLoop]: trace histogram [119, 104, 104, 104, 104, 104, 104, 104, 104, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:37,233 INFO L408 AbstractCegarLoop]: === Iteration 58 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:37,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1805398368, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:37,246 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:37,461 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 53454 backedges. 12280 proven. 728 refuted. 0 times theorem prover too weak. 40446 trivial. 0 not checked. [2018-04-09 22:10:38,865 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 53454 backedges. 12280 proven. 728 refuted. 0 times theorem prover too weak. 40446 trivial. 0 not checked. [2018-04-09 22:10:40,482 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:40,483 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 88 [2018-04-09 22:10:40,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-04-09 22:10:40,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-04-09 22:10:40,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=986, Invalid=6670, Unknown=0, NotChecked=0, Total=7656 [2018-04-09 22:10:40,484 INFO L87 Difference]: Start difference. First operand 1432 states and 1439 transitions. Second operand 88 states. [2018-04-09 22:10:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:42,147 INFO L93 Difference]: Finished difference Result 1634 states and 1646 transitions. [2018-04-09 22:10:42,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-04-09 22:10:42,147 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 1257 [2018-04-09 22:10:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:42,150 INFO L225 Difference]: With dead ends: 1634 [2018-04-09 22:10:42,151 INFO L226 Difference]: Without dead ends: 1444 [2018-04-09 22:10:42,152 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2583 GetRequests, 2397 SyntacticMatches, 31 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9574 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3740, Invalid=20752, Unknown=0, NotChecked=0, Total=24492 [2018-04-09 22:10:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2018-04-09 22:10:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1432. [2018-04-09 22:10:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-04-09 22:10:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1437 transitions. [2018-04-09 22:10:42,238 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1437 transitions. Word has length 1257 [2018-04-09 22:10:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:42,239 INFO L459 AbstractCegarLoop]: Abstraction has 1432 states and 1437 transitions. [2018-04-09 22:10:42,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-04-09 22:10:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1437 transitions. [2018-04-09 22:10:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2018-04-09 22:10:42,247 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:42,247 INFO L355 BasicCegarLoop]: trace histogram [120, 105, 105, 105, 105, 105, 105, 105, 105, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:42,247 INFO L408 AbstractCegarLoop]: === Iteration 59 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash 224635817, now seen corresponding path program 6 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:42,253 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:42,465 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 54420 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 53445 trivial. 0 not checked. [2018-04-09 22:10:43,160 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 54420 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 53445 trivial. 0 not checked. [2018-04-09 22:10:44,224 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:44,224 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-04-09 22:10:44,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-04-09 22:10:44,225 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-04-09 22:10:44,225 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2018-04-09 22:10:44,226 INFO L87 Difference]: Start difference. First operand 1432 states and 1437 transitions. Second operand 64 states. [2018-04-09 22:10:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:45,591 INFO L93 Difference]: Finished difference Result 1622 states and 1658 transitions. [2018-04-09 22:10:45,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-04-09 22:10:45,591 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 1266 [2018-04-09 22:10:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:45,597 INFO L225 Difference]: With dead ends: 1622 [2018-04-09 22:10:45,597 INFO L226 Difference]: Without dead ends: 1600 [2018-04-09 22:10:45,598 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2591 GetRequests, 2469 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4867, Invalid=10385, Unknown=0, NotChecked=0, Total=15252 [2018-04-09 22:10:45,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2018-04-09 22:10:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1573. [2018-04-09 22:10:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1573 states. [2018-04-09 22:10:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 1608 transitions. [2018-04-09 22:10:45,650 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 1608 transitions. Word has length 1266 [2018-04-09 22:10:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:45,651 INFO L459 AbstractCegarLoop]: Abstraction has 1573 states and 1608 transitions. [2018-04-09 22:10:45,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-04-09 22:10:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 1608 transitions. [2018-04-09 22:10:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1393 [2018-04-09 22:10:45,667 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:45,667 INFO L355 BasicCegarLoop]: trace histogram [135, 120, 119, 119, 119, 119, 119, 119, 119, 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] [2018-04-09 22:10:45,668 INFO L408 AbstractCegarLoop]: === Iteration 60 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:45,668 INFO L82 PathProgramCache]: Analyzing trace with hash 812860026, now seen corresponding path program 36 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:45,674 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:45,907 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 69381 backedges. 15075 proven. 861 refuted. 0 times theorem prover too weak. 53445 trivial. 0 not checked. [2018-04-09 22:10:47,552 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 69381 backedges. 15075 proven. 861 refuted. 0 times theorem prover too weak. 53445 trivial. 0 not checked. [2018-04-09 22:10:49,494 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:49,495 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 92 [2018-04-09 22:10:49,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-04-09 22:10:49,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-04-09 22:10:49,496 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=7894, Unknown=0, NotChecked=0, Total=8556 [2018-04-09 22:10:49,496 INFO L87 Difference]: Start difference. First operand 1573 states and 1608 transitions. Second operand 93 states. [2018-04-09 22:10:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:53,227 INFO L93 Difference]: Finished difference Result 1593 states and 1641 transitions. [2018-04-09 22:10:53,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-04-09 22:10:53,227 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 1392 [2018-04-09 22:10:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:53,230 INFO L225 Difference]: With dead ends: 1593 [2018-04-09 22:10:53,231 INFO L226 Difference]: Without dead ends: 1592 [2018-04-09 22:10:53,232 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2858 GetRequests, 2660 SyntacticMatches, 33 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8677 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2524, Invalid=25198, Unknown=0, NotChecked=0, Total=27722 [2018-04-09 22:10:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2018-04-09 22:10:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1573. [2018-04-09 22:10:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1573 states. [2018-04-09 22:10:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 1607 transitions. [2018-04-09 22:10:53,283 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 1607 transitions. Word has length 1392 [2018-04-09 22:10:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:53,284 INFO L459 AbstractCegarLoop]: Abstraction has 1573 states and 1607 transitions. [2018-04-09 22:10:53,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-04-09 22:10:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 1607 transitions. [2018-04-09 22:10:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1397 [2018-04-09 22:10:53,293 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:53,294 INFO L355 BasicCegarLoop]: trace histogram [135, 119, 119, 119, 119, 119, 119, 119, 119, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:10:53,294 INFO L408 AbstractCegarLoop]: === Iteration 61 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:53,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1698837043, now seen corresponding path program 6 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:53,299 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:53,524 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:10:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 69337 backedges. 15000 proven. 847 refuted. 0 times theorem prover too weak. 53490 trivial. 0 not checked. [2018-04-09 22:10:55,129 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:10:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 69337 backedges. 15000 proven. 847 refuted. 0 times theorem prover too weak. 53490 trivial. 0 not checked. [2018-04-09 22:10:57,052 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:10:57,053 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 94 [2018-04-09 22:10:57,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-04-09 22:10:57,054 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-04-09 22:10:57,054 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=7626, Unknown=0, NotChecked=0, Total=8742 [2018-04-09 22:10:57,054 INFO L87 Difference]: Start difference. First operand 1573 states and 1607 transitions. Second operand 94 states. [2018-04-09 22:10:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:10:58,949 INFO L93 Difference]: Finished difference Result 1908 states and 1989 transitions. [2018-04-09 22:10:58,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-04-09 22:10:58,982 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 1396 [2018-04-09 22:10:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:10:58,986 INFO L225 Difference]: With dead ends: 1908 [2018-04-09 22:10:58,986 INFO L226 Difference]: Without dead ends: 1589 [2018-04-09 22:10:58,990 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2866 GetRequests, 2667 SyntacticMatches, 33 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11030 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4262, Invalid=23794, Unknown=0, NotChecked=0, Total=28056 [2018-04-09 22:10:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2018-04-09 22:10:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1573. [2018-04-09 22:10:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1573 states. [2018-04-09 22:10:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 1606 transitions. [2018-04-09 22:10:59,077 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 1606 transitions. Word has length 1396 [2018-04-09 22:10:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:10:59,078 INFO L459 AbstractCegarLoop]: Abstraction has 1573 states and 1606 transitions. [2018-04-09 22:10:59,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-04-09 22:10:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 1606 transitions. [2018-04-09 22:10:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1402 [2018-04-09 22:10:59,095 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:10:59,095 INFO L355 BasicCegarLoop]: trace histogram [136, 121, 120, 120, 120, 120, 120, 120, 120, 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] [2018-04-09 22:10:59,095 INFO L408 AbstractCegarLoop]: === Iteration 62 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:10:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2121375531, now seen corresponding path program 37 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:10:59,104 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:10:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:10:59,367 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:11:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 70485 backedges. 16050 proven. 990 refuted. 0 times theorem prover too weak. 53445 trivial. 0 not checked. [2018-04-09 22:11:01,007 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:11:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 70485 backedges. 16050 proven. 990 refuted. 0 times theorem prover too weak. 53445 trivial. 0 not checked. [2018-04-09 22:11:02,885 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:11:02,886 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 97 [2018-04-09 22:11:02,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-04-09 22:11:02,887 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-04-09 22:11:02,887 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=8159, Unknown=0, NotChecked=0, Total=9312 [2018-04-09 22:11:02,888 INFO L87 Difference]: Start difference. First operand 1573 states and 1606 transitions. Second operand 97 states. [2018-04-09 22:11:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:11:05,837 INFO L93 Difference]: Finished difference Result 2046 states and 2111 transitions. [2018-04-09 22:11:05,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-04-09 22:11:05,837 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 1401 [2018-04-09 22:11:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:11:05,841 INFO L225 Difference]: With dead ends: 2046 [2018-04-09 22:11:05,841 INFO L226 Difference]: Without dead ends: 1730 [2018-04-09 22:11:05,845 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2893 GetRequests, 2673 SyntacticMatches, 33 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9717 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5139, Invalid=30393, Unknown=0, NotChecked=0, Total=35532 [2018-04-09 22:11:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2018-04-09 22:11:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1719. [2018-04-09 22:11:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1719 states. [2018-04-09 22:11:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 1751 transitions. [2018-04-09 22:11:05,911 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 1751 transitions. Word has length 1401 [2018-04-09 22:11:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:11:05,911 INFO L459 AbstractCegarLoop]: Abstraction has 1719 states and 1751 transitions. [2018-04-09 22:11:05,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-04-09 22:11:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 1751 transitions. [2018-04-09 22:11:05,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1406 [2018-04-09 22:11:05,922 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:11:05,922 INFO L355 BasicCegarLoop]: trace histogram [136, 120, 120, 120, 120, 120, 120, 120, 120, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-09 22:11:05,922 INFO L408 AbstractCegarLoop]: === Iteration 63 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:11:05,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1636774300, now seen corresponding path program 7 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:11:05,928 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:11:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:11:06,178 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:11:06,181 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 [2018-04-09 22:11:06,181 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:11:06,190 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:11:06,191 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:11:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 70440 backedges. 0 proven. 1020 refuted. 0 times theorem prover too weak. 69420 trivial. 0 not checked. [2018-04-09 22:11:09,613 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:11:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 70440 backedges. 0 proven. 1020 refuted. 0 times theorem prover too weak. 69420 trivial. 0 not checked. [2018-04-09 22:11:11,513 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:11:11,513 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 66 [2018-04-09 22:11:11,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-09 22:11:11,514 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-09 22:11:11,515 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=3715, Unknown=0, NotChecked=0, Total=4422 [2018-04-09 22:11:11,515 INFO L87 Difference]: Start difference. First operand 1719 states and 1751 transitions. Second operand 67 states. [2018-04-09 22:11:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:11:18,726 INFO L93 Difference]: Finished difference Result 1731 states and 1765 transitions. [2018-04-09 22:11:18,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-04-09 22:11:18,726 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 1405 [2018-04-09 22:11:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:11:18,730 INFO L225 Difference]: With dead ends: 1731 [2018-04-09 22:11:18,730 INFO L226 Difference]: Without dead ends: 1730 [2018-04-09 22:11:18,732 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2884 GetRequests, 2713 SyntacticMatches, 31 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5258 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5043, Invalid=14979, Unknown=0, NotChecked=0, Total=20022 [2018-04-09 22:11:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2018-04-09 22:11:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1722. [2018-04-09 22:11:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1722 states. [2018-04-09 22:11:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 1740 transitions. [2018-04-09 22:11:18,832 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 1740 transitions. Word has length 1405 [2018-04-09 22:11:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:11:18,833 INFO L459 AbstractCegarLoop]: Abstraction has 1722 states and 1740 transitions. [2018-04-09 22:11:18,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-09 22:11:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 1740 transitions. [2018-04-09 22:11:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1557 [2018-04-09 22:11:18,852 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:11:18,852 INFO L355 BasicCegarLoop]: trace histogram [152, 136, 135, 135, 135, 135, 135, 135, 135, 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] [2018-04-09 22:11:18,853 INFO L408 AbstractCegarLoop]: === Iteration 64 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:11:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1049345705, now seen corresponding path program 38 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:11:18,863 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:11:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:11:19,162 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:11:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 88706 backedges. 18296 proven. 990 refuted. 0 times theorem prover too weak. 69420 trivial. 0 not checked. [2018-04-09 22:11:21,104 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:11:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 88706 backedges. 18296 proven. 990 refuted. 0 times theorem prover too weak. 69420 trivial. 0 not checked. [2018-04-09 22:11:23,365 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:11:23,365 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 98 [2018-04-09 22:11:23,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-04-09 22:11:23,366 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-04-09 22:11:23,367 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=8964, Unknown=0, NotChecked=0, Total=9702 [2018-04-09 22:11:23,367 INFO L87 Difference]: Start difference. First operand 1722 states and 1740 transitions. Second operand 99 states. [2018-04-09 22:11:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:11:28,147 INFO L93 Difference]: Finished difference Result 1752 states and 1785 transitions. [2018-04-09 22:11:28,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-04-09 22:11:28,147 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 1556 [2018-04-09 22:11:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:11:28,150 INFO L225 Difference]: With dead ends: 1752 [2018-04-09 22:11:28,150 INFO L226 Difference]: Without dead ends: 1751 [2018-04-09 22:11:28,152 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3192 GetRequests, 2981 SyntacticMatches, 35 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9903 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2829, Invalid=28677, Unknown=0, NotChecked=0, Total=31506 [2018-04-09 22:11:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2018-04-09 22:11:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1730. [2018-04-09 22:11:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1730 states. [2018-04-09 22:11:28,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 1749 transitions. [2018-04-09 22:11:28,212 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 1749 transitions. Word has length 1556 [2018-04-09 22:11:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:11:28,213 INFO L459 AbstractCegarLoop]: Abstraction has 1730 states and 1749 transitions. [2018-04-09 22:11:28,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-04-09 22:11:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 1749 transitions. [2018-04-09 22:11:28,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1558 [2018-04-09 22:11:28,225 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:11:28,225 INFO L355 BasicCegarLoop]: trace histogram [152, 136, 136, 135, 135, 135, 135, 135, 135, 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] [2018-04-09 22:11:28,226 INFO L408 AbstractCegarLoop]: === Iteration 65 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:11:28,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1830021629, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:11:28,231 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:11:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:11:28,554 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:11:28,557 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 [2018-04-09 22:11:28,557 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-04-09 22:11:28,569 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-04-09 22:11:28,569 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-04-09 22:11:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 88841 backedges. 17288 proven. 1005 refuted. 0 times theorem prover too weak. 70548 trivial. 0 not checked. [2018-04-09 22:11:32,383 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:11:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 88841 backedges. 17288 proven. 1005 refuted. 0 times theorem prover too weak. 70548 trivial. 0 not checked. [2018-04-09 22:11:34,975 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:11:34,976 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 70 [2018-04-09 22:11:34,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-04-09 22:11:34,977 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-04-09 22:11:34,977 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=4251, Unknown=0, NotChecked=0, Total=4970 [2018-04-09 22:11:34,977 INFO L87 Difference]: Start difference. First operand 1730 states and 1749 transitions. Second operand 71 states. [2018-04-09 22:11:38,356 WARN L151 SmtUtils]: Spent 105ms on a formula simplification. DAG size of input: 126 DAG size of output 29 [2018-04-09 22:11:38,706 WARN L151 SmtUtils]: Spent 100ms on a formula simplification. DAG size of input: 122 DAG size of output 28 [2018-04-09 22:11:38,923 WARN L151 SmtUtils]: Spent 104ms on a formula simplification. DAG size of input: 119 DAG size of output 29 [2018-04-09 22:11:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:11:44,402 INFO L93 Difference]: Finished difference Result 1930 states and 2219 transitions. [2018-04-09 22:11:44,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-04-09 22:11:44,402 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 1557 [2018-04-09 22:11:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:11:44,408 INFO L225 Difference]: With dead ends: 1930 [2018-04-09 22:11:44,409 INFO L226 Difference]: Without dead ends: 1929 [2018-04-09 22:11:44,411 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3221 GetRequests, 3029 SyntacticMatches, 31 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5950 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=5718, Invalid=20688, Unknown=0, NotChecked=0, Total=26406 [2018-04-09 22:11:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2018-04-09 22:11:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1866. [2018-04-09 22:11:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1866 states. [2018-04-09 22:11:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 1915 transitions. [2018-04-09 22:11:44,552 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 1915 transitions. Word has length 1557 [2018-04-09 22:11:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:11:44,554 INFO L459 AbstractCegarLoop]: Abstraction has 1866 states and 1915 transitions. [2018-04-09 22:11:44,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-04-09 22:11:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 1915 transitions. [2018-04-09 22:11:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1566 [2018-04-09 22:11:44,573 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:11:44,573 INFO L355 BasicCegarLoop]: trace histogram [153, 137, 136, 136, 136, 136, 136, 136, 136, 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] [2018-04-09 22:11:44,574 INFO L408 AbstractCegarLoop]: === Iteration 66 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:11:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash -820705042, now seen corresponding path program 39 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:11:44,582 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:11:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:11:44,879 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:11:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 89956 backedges. 19408 proven. 1128 refuted. 0 times theorem prover too weak. 69420 trivial. 0 not checked. [2018-04-09 22:11:46,754 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:11:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 89956 backedges. 19408 proven. 1128 refuted. 0 times theorem prover too weak. 69420 trivial. 0 not checked. [2018-04-09 22:11:48,849 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:11:48,850 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 103 [2018-04-09 22:11:48,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-04-09 22:11:48,851 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-04-09 22:11:48,851 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1293, Invalid=9213, Unknown=0, NotChecked=0, Total=10506 [2018-04-09 22:11:48,852 INFO L87 Difference]: Start difference. First operand 1866 states and 1915 transitions. Second operand 103 states. [2018-04-09 22:11:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:11:52,643 INFO L93 Difference]: Finished difference Result 2488 states and 2587 transitions. [2018-04-09 22:11:52,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-04-09 22:11:52,643 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 1565 [2018-04-09 22:11:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:11:52,649 INFO L225 Difference]: With dead ends: 2488 [2018-04-09 22:11:52,649 INFO L226 Difference]: Without dead ends: 2034 [2018-04-09 22:11:52,655 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3227 GetRequests, 2993 SyntacticMatches, 35 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11045 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5784, Invalid=34416, Unknown=0, NotChecked=0, Total=40200 [2018-04-09 22:11:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2018-04-09 22:11:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 2021. [2018-04-09 22:11:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2021 states. [2018-04-09 22:11:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2070 transitions. [2018-04-09 22:11:52,727 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2070 transitions. Word has length 1565 [2018-04-09 22:11:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:11:52,728 INFO L459 AbstractCegarLoop]: Abstraction has 2021 states and 2070 transitions. [2018-04-09 22:11:52,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-04-09 22:11:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2070 transitions. [2018-04-09 22:11:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1721 [2018-04-09 22:11:52,775 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:11:52,776 INFO L355 BasicCegarLoop]: trace histogram [169, 152, 151, 151, 151, 151, 151, 151, 151, 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] [2018-04-09 22:11:52,776 INFO L408 AbstractCegarLoop]: === Iteration 67 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:11:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash -690469606, now seen corresponding path program 40 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:11:52,784 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:11:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:11:53,158 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:11:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 110419 backedges. 38848 proven. 975 refuted. 0 times theorem prover too weak. 70596 trivial. 0 not checked. [2018-04-09 22:11:55,158 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:11:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 110419 backedges. 38848 proven. 975 refuted. 0 times theorem prover too weak. 70596 trivial. 0 not checked. [2018-04-09 22:11:57,490 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:11:57,490 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 100 [2018-04-09 22:11:57,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-04-09 22:11:57,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-04-09 22:11:57,492 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1254, Invalid=8646, Unknown=0, NotChecked=0, Total=9900 [2018-04-09 22:11:57,493 INFO L87 Difference]: Start difference. First operand 2021 states and 2070 transitions. Second operand 100 states. [2018-04-09 22:11:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:11:59,510 INFO L93 Difference]: Finished difference Result 2493 states and 2603 transitions. [2018-04-09 22:11:59,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-04-09 22:11:59,510 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 1720 [2018-04-09 22:11:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:11:59,515 INFO L225 Difference]: With dead ends: 2493 [2018-04-09 22:11:59,515 INFO L226 Difference]: Without dead ends: 2033 [2018-04-09 22:11:59,523 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3519 GetRequests, 3307 SyntacticMatches, 35 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12589 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4818, Invalid=27044, Unknown=0, NotChecked=0, Total=31862 [2018-04-09 22:11:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2018-04-09 22:11:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2021. [2018-04-09 22:11:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2021 states. [2018-04-09 22:11:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2068 transitions. [2018-04-09 22:11:59,602 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2068 transitions. Word has length 1720 [2018-04-09 22:11:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:11:59,603 INFO L459 AbstractCegarLoop]: Abstraction has 2021 states and 2068 transitions. [2018-04-09 22:11:59,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-04-09 22:11:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2068 transitions. [2018-04-09 22:11:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1730 [2018-04-09 22:11:59,617 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:11:59,617 INFO L355 BasicCegarLoop]: trace histogram [170, 153, 152, 152, 152, 152, 152, 152, 152, 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] [2018-04-09 22:11:59,618 INFO L408 AbstractCegarLoop]: === Iteration 68 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:11:59,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1618551503, now seen corresponding path program 41 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:11:59,623 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:11:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:11:59,964 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:12:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 111815 backedges. 21947 proven. 1128 refuted. 0 times theorem prover too weak. 88740 trivial. 0 not checked. [2018-04-09 22:12:02,177 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:12:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 111815 backedges. 21947 proven. 1128 refuted. 0 times theorem prover too weak. 88740 trivial. 0 not checked. [2018-04-09 22:12:04,757 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:12:04,757 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 104 [2018-04-09 22:12:04,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-04-09 22:12:04,759 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-04-09 22:12:04,759 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=10102, Unknown=0, NotChecked=0, Total=10920 [2018-04-09 22:12:04,759 INFO L87 Difference]: Start difference. First operand 2021 states and 2068 transitions. Second operand 105 states. [2018-04-09 22:12:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:12:09,484 INFO L93 Difference]: Finished difference Result 2037 states and 2096 transitions. [2018-04-09 22:12:09,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-04-09 22:12:09,484 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 1729 [2018-04-09 22:12:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:12:09,487 INFO L225 Difference]: With dead ends: 2037 [2018-04-09 22:12:09,487 INFO L226 Difference]: Without dead ends: 2036 [2018-04-09 22:12:09,488 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3542 GetRequests, 3318 SyntacticMatches, 37 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11210 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3151, Invalid=32381, Unknown=0, NotChecked=0, Total=35532 [2018-04-09 22:12:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2018-04-09 22:12:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 2021. [2018-04-09 22:12:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2021 states. [2018-04-09 22:12:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2067 transitions. [2018-04-09 22:12:09,559 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2067 transitions. Word has length 1729 [2018-04-09 22:12:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:12:09,560 INFO L459 AbstractCegarLoop]: Abstraction has 2021 states and 2067 transitions. [2018-04-09 22:12:09,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-04-09 22:12:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2067 transitions. [2018-04-09 22:12:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1739 [2018-04-09 22:12:09,574 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:12:09,575 INFO L355 BasicCegarLoop]: trace histogram [171, 154, 153, 153, 153, 153, 153, 153, 153, 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] [2018-04-09 22:12:09,575 INFO L408 AbstractCegarLoop]: === Iteration 69 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:12:09,575 INFO L82 PathProgramCache]: Analyzing trace with hash 592126548, now seen corresponding path program 42 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:12:09,583 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:12:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:12:09,880 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:12:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 113220 backedges. 23205 proven. 1275 refuted. 0 times theorem prover too weak. 88740 trivial. 0 not checked. [2018-04-09 22:12:12,043 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:12:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 113220 backedges. 23205 proven. 1275 refuted. 0 times theorem prover too weak. 88740 trivial. 0 not checked. [2018-04-09 22:12:14,473 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:12:14,473 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 109 [2018-04-09 22:12:14,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-04-09 22:12:14,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-04-09 22:12:14,475 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1441, Invalid=10331, Unknown=0, NotChecked=0, Total=11772 [2018-04-09 22:12:14,475 INFO L87 Difference]: Start difference. First operand 2021 states and 2067 transitions. Second operand 109 states. [2018-04-09 22:12:18,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:12:18,648 INFO L93 Difference]: Finished difference Result 2643 states and 2736 transitions. [2018-04-09 22:12:18,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-04-09 22:12:18,649 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 1738 [2018-04-09 22:12:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:12:18,652 INFO L225 Difference]: With dead ends: 2643 [2018-04-09 22:12:18,652 INFO L226 Difference]: Without dead ends: 2198 [2018-04-09 22:12:18,657 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3579 GetRequests, 3331 SyntacticMatches, 37 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12458 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6467, Invalid=38689, Unknown=0, NotChecked=0, Total=45156 [2018-04-09 22:12:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2018-04-09 22:12:18,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 2185. [2018-04-09 22:12:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2185 states. [2018-04-09 22:12:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 2231 transitions. [2018-04-09 22:12:18,747 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 2231 transitions. Word has length 1738 [2018-04-09 22:12:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:12:18,748 INFO L459 AbstractCegarLoop]: Abstraction has 2185 states and 2231 transitions. [2018-04-09 22:12:18,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-04-09 22:12:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 2231 transitions. [2018-04-09 22:12:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1903 [2018-04-09 22:12:18,765 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:12:18,765 INFO L355 BasicCegarLoop]: trace histogram [188, 170, 169, 169, 169, 169, 169, 169, 169, 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] [2018-04-09 22:12:18,765 INFO L408 AbstractCegarLoop]: === Iteration 70 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:12:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1181028081, now seen corresponding path program 43 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:12:18,771 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-04-09 22:12:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:12:19,093 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:12:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 137613 backedges. 46435 proven. 1112 refuted. 0 times theorem prover too weak. 90066 trivial. 0 not checked. [2018-04-09 22:12:21,476 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-04-09 22:12:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 137613 backedges. 46435 proven. 1112 refuted. 0 times theorem prover too weak. 90066 trivial. 0 not checked. [2018-04-09 22:12:24,186 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-09 22:12:24,186 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 106 [2018-04-09 22:12:24,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-04-09 22:12:24,188 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-04-09 22:12:24,188 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1400, Invalid=9730, Unknown=0, NotChecked=0, Total=11130 [2018-04-09 22:12:24,188 INFO L87 Difference]: Start difference. First operand 2185 states and 2231 transitions. Second operand 106 states. [2018-04-09 22:12:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-09 22:12:26,314 INFO L93 Difference]: Finished difference Result 2648 states and 2751 transitions. [2018-04-09 22:12:26,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-04-09 22:12:26,314 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 1902 [2018-04-09 22:12:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-09 22:12:26,316 INFO L225 Difference]: With dead ends: 2648 [2018-04-09 22:12:26,317 INFO L226 Difference]: Without dead ends: 2197 [2018-04-09 22:12:26,320 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 3888 GetRequests, 3663 SyntacticMatches, 37 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14251 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5408, Invalid=30502, Unknown=0, NotChecked=0, Total=35910 [2018-04-09 22:12:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2018-04-09 22:12:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2185. [2018-04-09 22:12:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2185 states. [2018-04-09 22:12:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 2229 transitions. [2018-04-09 22:12:26,395 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 2229 transitions. Word has length 1902 [2018-04-09 22:12:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-09 22:12:26,396 INFO L459 AbstractCegarLoop]: Abstraction has 2185 states and 2229 transitions. [2018-04-09 22:12:26,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-04-09 22:12:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 2229 transitions. [2018-04-09 22:12:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1912 [2018-04-09 22:12:26,413 INFO L347 BasicCegarLoop]: Found error trace [2018-04-09 22:12:26,413 INFO L355 BasicCegarLoop]: trace histogram [189, 171, 170, 170, 170, 170, 170, 170, 170, 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] [2018-04-09 22:12:26,413 INFO L408 AbstractCegarLoop]: === Iteration 71 === [mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr2RequiresViolation, mainErr4EnsuresViolationMEMORY_LEAK, mainErr0RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength_true_valid_memsafety_c__fooErr0AssertViolationARRAY_INDEX]=== [2018-04-09 22:12:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash -819169618, now seen corresponding path program 44 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-04-09 22:12:26,419 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy Received shutdown request... [2018-04-09 22:12:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-09 22:12:26,744 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-09 22:12:26,750 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-04-09 22:12:26,751 WARN L519 AbstractCegarLoop]: Verification canceled [2018-04-09 22:12:26,754 WARN L197 ceAbstractionStarter]: Timeout [2018-04-09 22:12:26,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.04 10:12:26 BoogieIcfgContainer [2018-04-09 22:12:26,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-04-09 22:12:26,755 INFO L168 Benchmark]: Toolchain (without parser) took 226451.64 ms. Allocated memory was 303.0 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 246.0 MB in the beginning and 1.7 GB in the end (delta: -1.5 GB). Peak memory consumption was 482.8 MB. Max. memory is 5.3 GB. [2018-04-09 22:12:26,756 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 303.0 MB. Free memory is still 265.3 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-04-09 22:12:26,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.43 ms. Allocated memory is still 303.0 MB. Free memory was 246.0 MB in the beginning and 236.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-04-09 22:12:26,757 INFO L168 Benchmark]: Boogie Preprocessor took 38.24 ms. Allocated memory is still 303.0 MB. Free memory was 236.0 MB in the beginning and 234.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-04-09 22:12:26,757 INFO L168 Benchmark]: RCFGBuilder took 350.75 ms. Allocated memory was 303.0 MB in the beginning and 459.3 MB in the end (delta: 156.2 MB). Free memory was 234.0 MB in the beginning and 425.1 MB in the end (delta: -191.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 5.3 GB. [2018-04-09 22:12:26,757 INFO L168 Benchmark]: TraceAbstraction took 225837.25 ms. Allocated memory was 459.3 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 425.1 MB in the beginning and 1.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 505.7 MB. Max. memory is 5.3 GB. [2018-04-09 22:12:26,759 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 303.0 MB. Free memory is still 265.3 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 220.43 ms. Allocated memory is still 303.0 MB. Free memory was 246.0 MB in the beginning and 236.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 38.24 ms. Allocated memory is still 303.0 MB. Free memory was 236.0 MB in the beginning and 234.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 350.75 ms. Allocated memory was 303.0 MB in the beginning and 459.3 MB in the end (delta: 156.2 MB). Free memory was 234.0 MB in the beginning and 425.1 MB in the end (delta: -191.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 225837.25 ms. Allocated memory was 459.3 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 425.1 MB in the beginning and 1.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 505.7 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 26). Cancelled while BasicCegarLoop was analyzing trace of length 1912 with TraceHistMax 189, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 23). Cancelled while BasicCegarLoop was analyzing trace of length 1912 with TraceHistMax 189, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 26). Cancelled while BasicCegarLoop was analyzing trace of length 1912 with TraceHistMax 189, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 20). Cancelled while BasicCegarLoop was analyzing trace of length 1912 with TraceHistMax 189, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - TimeoutResultAtElement [Line: 23]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 23). Cancelled while BasicCegarLoop was analyzing trace of length 1912 with TraceHistMax 189, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 15). Cancelled while BasicCegarLoop was analyzing trace of length 1912 with TraceHistMax 189, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds (line 15). Cancelled while BasicCegarLoop was analyzing trace of length 1912 with TraceHistMax 189, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 15). Cancelled while BasicCegarLoop was analyzing trace of length 1912 with TraceHistMax 189, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 8 error locations. TIMEOUT Result, 225.7s OverallTime, 71 OverallIterations, 189 TraceHistogramMax, 105.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6571 SDtfs, 21076 SDslu, 116689 SDs, 0 SdLazy, 113586 SolverSat, 5187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90075 GetRequests, 82738 SyntacticMatches, 1190 SemanticMatches, 6147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250280 ImplicationChecksByTransitivity, 114.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2185occurred in iteration=69, 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: 2.2s AutomataMinimizationTime, 70 MinimizatonAttempts, 1015 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 106.6s InterpolantComputationTime, 43610 NumberOfCodeBlocks, 43610 NumberOfCodeBlocksAsserted, 70 NumberOfCheckSat, 87080 ConstructedInterpolants, 3495 QuantifiedInterpolants, 210433006 SizeOfPredicates, 2072 NumberOfNonLiveVariables, 84011 ConjunctsInSsa, 2696 ConjunctsInUnsatCore, 140 InterpolantComputations, 18 PerfectInterpolantSequences, 3344236/3393220 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_true-valid-memsafety.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf_AutomizerC.xml/Csv-Benchmark-0-2018-04-09_22-12-26-765.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength_true-valid-memsafety.c_svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-04-09_22-12-26-765.csv Completed graceful shutdown