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/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4cf2d92 [2018-03-28 13:12:30,513 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-03-28 13:12:30,515 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-03-28 13:12:30,529 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-03-28 13:12:30,529 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-03-28 13:12:30,530 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-03-28 13:12:30,530 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-03-28 13:12:30,532 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-03-28 13:12:30,534 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-03-28 13:12:30,535 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-03-28 13:12:30,536 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-03-28 13:12:30,536 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-03-28 13:12:30,537 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-03-28 13:12:30,539 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-03-28 13:12:30,539 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-03-28 13:12:30,542 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-03-28 13:12:30,544 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-03-28 13:12:30,546 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-03-28 13:12:30,547 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-03-28 13:12:30,548 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-03-28 13:12:30,550 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-03-28 13:12:30,551 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-03-28 13:12:30,551 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-03-28 13:12:30,552 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-03-28 13:12:30,553 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-03-28 13:12:30,554 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-03-28 13:12:30,555 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-03-28 13:12:30,555 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-03-28 13:12:30,556 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-03-28 13:12:30,556 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-03-28 13:12:30,557 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-03-28 13:12:30,557 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Fixed_noBitfields+AI_EQ_SS.epf [2018-03-28 13:12:30,582 INFO L110 SettingsManager]: Loading preferences was successful [2018-03-28 13:12:30,582 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-03-28 13:12:30,582 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-03-28 13:12:30,582 INFO L133 SettingsManager]: * ultimate.logging.details=de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation=DEBUG; [2018-03-28 13:12:30,583 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-03-28 13:12:30,583 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-03-28 13:12:30,583 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-03-28 13:12:30,583 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-03-28 13:12:30,583 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-03-28 13:12:30,583 INFO L131 SettingsManager]: Preferences of LTL2Aut differ from their defaults: [2018-03-28 13:12:30,583 INFO L133 SettingsManager]: * Property to check=[] a a: x > 42 [2018-03-28 13:12:30,584 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-03-28 13:12:30,584 INFO L133 SettingsManager]: * sizeof long=4 [2018-03-28 13:12:30,584 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-03-28 13:12:30,584 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-03-28 13:12:30,584 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-03-28 13:12:30,584 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-03-28 13:12:30,585 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-03-28 13:12:30,585 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-03-28 13:12:30,585 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-03-28 13:12:30,585 INFO L133 SettingsManager]: * sizeof long double=12 [2018-03-28 13:12:30,585 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-03-28 13:12:30,585 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-03-28 13:12:30,586 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-03-28 13:12:30,586 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-03-28 13:12:30,586 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-03-28 13:12:30,586 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-03-28 13:12:30,586 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-03-28 13:12:30,586 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-03-28 13:12:30,587 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-03-28 13:12:30,587 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-03-28 13:12:30,587 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:30,587 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-03-28 13:12:30,588 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-03-28 13:12:30,588 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-03-28 13:12:30,588 INFO L131 SettingsManager]: Preferences of Boogie Printer differ from their defaults: [2018-03-28 13:12:30,588 INFO L133 SettingsManager]: * Dump path:=C:\Users\alex\AppData\Local\Temp\ [2018-03-28 13:12:30,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-03-28 13:12:30,629 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-03-28 13:12:30,632 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-03-28 13:12:30,633 INFO L271 PluginConnector]: Initializing CDTParser... [2018-03-28 13:12:30,634 INFO L276 PluginConnector]: CDTParser initialized [2018-03-28 13:12:30,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-03-28 13:12:30,926 INFO L228 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG91c9c5b78 [2018-03-28 13:12:31,067 INFO L291 CDTParser]: IsIndexed: true [2018-03-28 13:12:31,067 INFO L292 CDTParser]: Found 1 translation units. [2018-03-28 13:12:31,068 INFO L171 CDTParser]: Scanning ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-03-28 13:12:31,069 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-03-28 13:12:31,069 INFO L215 ultiparseSymbolTable]: [2018-03-28 13:12:31,069 INFO L218 ultiparseSymbolTable]: Function table: [2018-03-28 13:12:31,069 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-03-28 13:12:31,069 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__foo ('foo') in ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-03-28 13:12:31,069 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-03-28 13:12:31,069 INFO L233 ultiparseSymbolTable]: [2018-03-28 13:12:31,086 INFO L334 CDTParser]: Deleted temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG91c9c5b78 [2018-03-28 13:12:31,091 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-03-28 13:12:31,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-03-28 13:12:31,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-03-28 13:12:31,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-03-28 13:12:31,101 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-03-28 13:12:31,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.03 01:12:31" (1/1) ... [2018-03-28 13:12:31,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c610584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31, skipping insertion in model container [2018-03-28 13:12:31,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.03 01:12:31" (1/1) ... [2018-03-28 13:12:31,118 INFO L167 Dispatcher]: Using SV-COMP mode [2018-03-28 13:12:31,130 INFO L167 Dispatcher]: Using SV-COMP mode [2018-03-28 13:12:31,256 INFO L175 PostProcessor]: Settings: Checked method=main [2018-03-28 13:12:31,280 INFO L175 PostProcessor]: Settings: Checked method=main [2018-03-28 13:12:31,284 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 9 non ball SCCs. Number of states in SCCs 9. [2018-03-28 13:12:31,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31 WrapperNode [2018-03-28 13:12:31,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-03-28 13:12:31,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-03-28 13:12:31,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-03-28 13:12:31,293 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-03-28 13:12:31,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31" (1/1) ... [2018-03-28 13:12:31,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31" (1/1) ... [2018-03-28 13:12:31,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31" (1/1) ... [2018-03-28 13:12:31,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31" (1/1) ... [2018-03-28 13:12:31,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31" (1/1) ... [2018-03-28 13:12:31,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31" (1/1) ... [2018-03-28 13:12:31,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31" (1/1) ... [2018-03-28 13:12:31,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-03-28 13:12:31,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-03-28 13:12:31,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-03-28 13:12:31,325 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-03-28 13:12:31,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-03-28 13:12:31,383 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-03-28 13:12:31,383 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-03-28 13:12:31,383 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__foo [2018-03-28 13:12:31,384 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-03-28 13:12:31,384 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__foo [2018-03-28 13:12:31,384 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-03-28 13:12:31,384 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-03-28 13:12:31,384 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-03-28 13:12:31,384 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-03-28 13:12:31,385 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-03-28 13:12:31,385 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-03-28 13:12:31,385 INFO L128 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-03-28 13:12:31,385 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-03-28 13:12:31,668 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-03-28 13:12:31,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.03 01:12:31 BoogieIcfgContainer [2018-03-28 13:12:31,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-03-28 13:12:31,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-03-28 13:12:31,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-03-28 13:12:31,672 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-03-28 13:12:31,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.03 01:12:31" (1/3) ... [2018-03-28 13:12:31,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b113bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.03 01:12:31, skipping insertion in model container [2018-03-28 13:12:31,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:12:31" (2/3) ... [2018-03-28 13:12:31,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b113bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.03 01:12:31, skipping insertion in model container [2018-03-28 13:12:31,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.03 01:12:31" (3/3) ... [2018-03-28 13:12:31,675 INFO L107 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6_true-valid-memsafety_true-termination.c [2018-03-28 13:12:31,683 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-03-28 13:12:31,691 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-03-28 13:12:31,737 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-03-28 13:12:31,738 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-03-28 13:12:31,738 INFO L370 AbstractCegarLoop]: Hoare is true [2018-03-28 13:12:31,738 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-03-28 13:12:31,738 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-03-28 13:12:31,738 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-03-28 13:12:31,739 INFO L374 AbstractCegarLoop]: Difference is false [2018-03-28 13:12:31,739 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-03-28 13:12:31,739 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-03-28 13:12:31,740 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-03-28 13:12:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2018-03-28 13:12:31,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-03-28 13:12:31,758 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:31,759 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:31,759 INFO L408 AbstractCegarLoop]: === Iteration 1 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:31,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1751798805, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:31,779 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:31,819 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:31,872 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:31,931 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:12:31,931 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-03-28 13:12:31,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-03-28 13:12:31,943 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-03-28 13:12:31,944 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-03-28 13:12:31,946 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 5 states. [2018-03-28 13:12:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:32,050 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2018-03-28 13:12:32,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-03-28 13:12:32,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-03-28 13:12:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:32,061 INFO L225 Difference]: With dead ends: 141 [2018-03-28 13:12:32,061 INFO L226 Difference]: Without dead ends: 84 [2018-03-28 13:12:32,064 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-03-28 13:12:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-03-28 13:12:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2018-03-28 13:12:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-03-28 13:12:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2018-03-28 13:12:32,108 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 16 [2018-03-28 13:12:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:32,109 INFO L459 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2018-03-28 13:12:32,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-03-28 13:12:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2018-03-28 13:12:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-03-28 13:12:32,110 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:32,110 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:32,110 INFO L408 AbstractCegarLoop]: === Iteration 2 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:32,110 INFO L82 PathProgramCache]: Analyzing trace with hash -177512800, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:32,119 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:32,135 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:32,145 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:32,199 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:12:32,200 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2018-03-28 13:12:32,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-03-28 13:12:32,201 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-03-28 13:12:32,201 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-28 13:12:32,202 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 4 states. [2018-03-28 13:12:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:32,232 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2018-03-28 13:12:32,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-03-28 13:12:32,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-03-28 13:12:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:32,235 INFO L225 Difference]: With dead ends: 82 [2018-03-28 13:12:32,235 INFO L226 Difference]: Without dead ends: 81 [2018-03-28 13:12:32,236 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-28 13:12:32,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-03-28 13:12:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2018-03-28 13:12:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-03-28 13:12:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2018-03-28 13:12:32,242 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 25 [2018-03-28 13:12:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:32,243 INFO L459 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2018-03-28 13:12:32,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-03-28 13:12:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2018-03-28 13:12:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-03-28 13:12:32,244 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:32,244 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:32,244 INFO L408 AbstractCegarLoop]: === Iteration 3 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:32,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1207929453, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:32,263 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:32,289 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:32,318 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 [2018-03-28 13:12:32,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:12:32,321 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:12:32,322 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-03-28 13:12:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:32,354 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:32,407 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:12:32,408 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2018-03-28 13:12:32,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-03-28 13:12:32,409 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-03-28 13:12:32,409 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-03-28 13:12:32,409 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 6 states. [2018-03-28 13:12:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:32,498 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2018-03-28 13:12:32,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-03-28 13:12:32,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-03-28 13:12:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:32,501 INFO L225 Difference]: With dead ends: 71 [2018-03-28 13:12:32,502 INFO L226 Difference]: Without dead ends: 70 [2018-03-28 13:12:32,502 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-03-28 13:12:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-03-28 13:12:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-03-28 13:12:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-03-28 13:12:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2018-03-28 13:12:32,512 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 26 [2018-03-28 13:12:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:32,512 INFO L459 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2018-03-28 13:12:32,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-03-28 13:12:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2018-03-28 13:12:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-03-28 13:12:32,514 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:32,514 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:32,514 INFO L408 AbstractCegarLoop]: === Iteration 4 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1207929452, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:32,527 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:32,545 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:32,555 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-03-28 13:12:32,555 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:12:32,564 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:12:32,565 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:12:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:32,668 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:32,803 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:12:32,803 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2018-03-28 13:12:32,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-03-28 13:12:32,803 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-03-28 13:12:32,803 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-03-28 13:12:32,804 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 12 states. [2018-03-28 13:12:32,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:32,980 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-03-28 13:12:32,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-28 13:12:32,981 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2018-03-28 13:12:32,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:32,982 INFO L225 Difference]: With dead ends: 79 [2018-03-28 13:12:32,982 INFO L226 Difference]: Without dead ends: 78 [2018-03-28 13:12:32,982 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2018-03-28 13:12:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-03-28 13:12:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2018-03-28 13:12:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-03-28 13:12:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2018-03-28 13:12:32,990 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 26 [2018-03-28 13:12:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:32,990 INFO L459 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2018-03-28 13:12:32,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-03-28 13:12:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2018-03-28 13:12:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-03-28 13:12:32,992 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:32,992 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:32,992 INFO L408 AbstractCegarLoop]: === Iteration 5 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1743777157, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:32,998 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:33,015 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:33,034 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:33,111 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:33,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-03-28 13:12:33,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-03-28 13:12:33,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-03-28 13:12:33,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-03-28 13:12:33,112 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 8 states. [2018-03-28 13:12:33,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:33,272 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2018-03-28 13:12:33,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-28 13:12:33,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2018-03-28 13:12:33,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:33,274 INFO L225 Difference]: With dead ends: 105 [2018-03-28 13:12:33,274 INFO L226 Difference]: Without dead ends: 104 [2018-03-28 13:12:33,274 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-03-28 13:12:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-03-28 13:12:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2018-03-28 13:12:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-03-28 13:12:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-03-28 13:12:33,284 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 34 [2018-03-28 13:12:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:33,284 INFO L459 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-03-28 13:12:33,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-03-28 13:12:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-03-28 13:12:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-03-28 13:12:33,286 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:33,286 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:33,286 INFO L408 AbstractCegarLoop]: === Iteration 6 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:33,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1777482929, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:33,293 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:33,312 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:33,317 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-03-28 13:12:33,317 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:12:33,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:12:33,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:12:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:33,382 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:33,495 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:33,496 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-03-28 13:12:33,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-28 13:12:33,496 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-28 13:12:33,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-03-28 13:12:33,497 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 16 states. [2018-03-28 13:12:33,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:33,810 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2018-03-28 13:12:33,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-03-28 13:12:33,810 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2018-03-28 13:12:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:33,812 INFO L225 Difference]: With dead ends: 99 [2018-03-28 13:12:33,812 INFO L226 Difference]: Without dead ends: 98 [2018-03-28 13:12:33,813 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2018-03-28 13:12:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-03-28 13:12:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2018-03-28 13:12:33,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-03-28 13:12:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2018-03-28 13:12:33,823 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 35 [2018-03-28 13:12:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:33,824 INFO L459 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2018-03-28 13:12:33,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-28 13:12:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2018-03-28 13:12:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-03-28 13:12:33,825 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:33,825 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:33,825 INFO L408 AbstractCegarLoop]: === Iteration 7 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1833243520, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:33,831 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:33,854 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:33,867 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:33,956 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:12:33,957 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-03-28 13:12:33,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-03-28 13:12:33,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-03-28 13:12:33,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-03-28 13:12:33,958 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 8 states. [2018-03-28 13:12:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:34,024 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2018-03-28 13:12:34,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-03-28 13:12:34,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2018-03-28 13:12:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:34,026 INFO L225 Difference]: With dead ends: 165 [2018-03-28 13:12:34,026 INFO L226 Difference]: Without dead ends: 89 [2018-03-28 13:12:34,026 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-03-28 13:12:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-03-28 13:12:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-03-28 13:12:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-03-28 13:12:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2018-03-28 13:12:34,034 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 37 [2018-03-28 13:12:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:34,035 INFO L459 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2018-03-28 13:12:34,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-03-28 13:12:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2018-03-28 13:12:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-03-28 13:12:34,037 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:34,037 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:34,037 INFO L408 AbstractCegarLoop]: === Iteration 8 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1745832933, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:34,043 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:34,060 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:34,101 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:34,184 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:34,184 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-03-28 13:12:34,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-03-28 13:12:34,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-03-28 13:12:34,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-03-28 13:12:34,186 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 12 states. [2018-03-28 13:12:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:34,293 INFO L93 Difference]: Finished difference Result 168 states and 178 transitions. [2018-03-28 13:12:34,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-03-28 13:12:34,294 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2018-03-28 13:12:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:34,295 INFO L225 Difference]: With dead ends: 168 [2018-03-28 13:12:34,295 INFO L226 Difference]: Without dead ends: 89 [2018-03-28 13:12:34,296 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2018-03-28 13:12:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-03-28 13:12:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-03-28 13:12:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-03-28 13:12:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2018-03-28 13:12:34,301 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 46 [2018-03-28 13:12:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:34,301 INFO L459 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2018-03-28 13:12:34,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-03-28 13:12:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2018-03-28 13:12:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-03-28 13:12:34,302 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:34,302 INFO L355 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:34,302 INFO L408 AbstractCegarLoop]: === Iteration 9 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:34,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1585197083, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:34,308 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:34,326 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:34,381 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:34,478 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:34,478 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-03-28 13:12:34,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-28 13:12:34,479 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-28 13:12:34,479 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-03-28 13:12:34,479 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 16 states. [2018-03-28 13:12:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:34,922 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2018-03-28 13:12:34,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-28 13:12:34,922 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2018-03-28 13:12:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:34,924 INFO L225 Difference]: With dead ends: 146 [2018-03-28 13:12:34,924 INFO L226 Difference]: Without dead ends: 145 [2018-03-28 13:12:34,924 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2018-03-28 13:12:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-03-28 13:12:34,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2018-03-28 13:12:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-03-28 13:12:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-03-28 13:12:34,932 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 52 [2018-03-28 13:12:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:34,933 INFO L459 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-03-28 13:12:34,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-28 13:12:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-03-28 13:12:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-03-28 13:12:34,934 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:34,934 INFO L355 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:34,934 INFO L408 AbstractCegarLoop]: === Iteration 10 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1896469265, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:34,941 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:34,958 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:34,961 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-03-28 13:12:34,961 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:12:34,964 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:12:34,964 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:12:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:35,116 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:35,289 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:35,289 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-03-28 13:12:35,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-03-28 13:12:35,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-03-28 13:12:35,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2018-03-28 13:12:35,290 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 24 states. [2018-03-28 13:12:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:36,063 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2018-03-28 13:12:36,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-03-28 13:12:36,063 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2018-03-28 13:12:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:36,064 INFO L225 Difference]: With dead ends: 138 [2018-03-28 13:12:36,064 INFO L226 Difference]: Without dead ends: 137 [2018-03-28 13:12:36,065 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2018-03-28 13:12:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-03-28 13:12:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2018-03-28 13:12:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-03-28 13:12:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2018-03-28 13:12:36,074 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 53 [2018-03-28 13:12:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:36,075 INFO L459 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2018-03-28 13:12:36,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-03-28 13:12:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2018-03-28 13:12:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-03-28 13:12:36,076 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:36,076 INFO L355 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:36,076 INFO L408 AbstractCegarLoop]: === Iteration 11 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:36,077 INFO L82 PathProgramCache]: Analyzing trace with hash -100491707, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:36,084 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:36,102 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:36,170 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:36,330 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:36,330 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-03-28 13:12:36,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-03-28 13:12:36,330 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-03-28 13:12:36,331 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2018-03-28 13:12:36,331 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand 20 states. [2018-03-28 13:12:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:36,644 INFO L93 Difference]: Finished difference Result 240 states and 254 transitions. [2018-03-28 13:12:36,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-03-28 13:12:36,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2018-03-28 13:12:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:36,645 INFO L225 Difference]: With dead ends: 240 [2018-03-28 13:12:36,646 INFO L226 Difference]: Without dead ends: 125 [2018-03-28 13:12:36,647 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=432, Invalid=900, Unknown=0, NotChecked=0, Total=1332 [2018-03-28 13:12:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-03-28 13:12:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-03-28 13:12:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-03-28 13:12:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2018-03-28 13:12:36,654 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 64 [2018-03-28 13:12:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:36,654 INFO L459 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2018-03-28 13:12:36,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-03-28 13:12:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2018-03-28 13:12:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-03-28 13:12:36,656 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:36,656 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:36,656 INFO L408 AbstractCegarLoop]: === Iteration 12 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:36,656 INFO L82 PathProgramCache]: Analyzing trace with hash -96334683, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:36,662 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:36,692 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:36,814 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:37,103 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:37,103 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-03-28 13:12:37,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-03-28 13:12:37,104 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-03-28 13:12:37,104 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2018-03-28 13:12:37,104 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 32 states. [2018-03-28 13:12:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:38,311 INFO L93 Difference]: Finished difference Result 234 states and 252 transitions. [2018-03-28 13:12:38,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-28 13:12:38,311 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 88 [2018-03-28 13:12:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:38,312 INFO L225 Difference]: With dead ends: 234 [2018-03-28 13:12:38,312 INFO L226 Difference]: Without dead ends: 233 [2018-03-28 13:12:38,314 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1096, Invalid=3194, Unknown=0, NotChecked=0, Total=4290 [2018-03-28 13:12:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-03-28 13:12:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 196. [2018-03-28 13:12:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-03-28 13:12:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 214 transitions. [2018-03-28 13:12:38,322 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 214 transitions. Word has length 88 [2018-03-28 13:12:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:38,322 INFO L459 AbstractCegarLoop]: Abstraction has 196 states and 214 transitions. [2018-03-28 13:12:38,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-03-28 13:12:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 214 transitions. [2018-03-28 13:12:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-03-28 13:12:38,323 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:38,324 INFO L355 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:38,324 INFO L408 AbstractCegarLoop]: === Iteration 13 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:38,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1308592175, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:38,330 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:38,359 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:38,363 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-03-28 13:12:38,363 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:12:38,366 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:12:38,366 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:12:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:38,596 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:38,998 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:38,998 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-03-28 13:12:38,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-03-28 13:12:38,999 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-03-28 13:12:38,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2018-03-28 13:12:39,000 INFO L87 Difference]: Start difference. First operand 196 states and 214 transitions. Second operand 40 states. [2018-03-28 13:12:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:41,397 INFO L93 Difference]: Finished difference Result 222 states and 240 transitions. [2018-03-28 13:12:41,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-03-28 13:12:41,398 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2018-03-28 13:12:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:41,399 INFO L225 Difference]: With dead ends: 222 [2018-03-28 13:12:41,400 INFO L226 Difference]: Without dead ends: 221 [2018-03-28 13:12:41,402 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1521, Invalid=5619, Unknown=0, NotChecked=0, Total=7140 [2018-03-28 13:12:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-03-28 13:12:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 197. [2018-03-28 13:12:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-03-28 13:12:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 208 transitions. [2018-03-28 13:12:41,413 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 208 transitions. Word has length 89 [2018-03-28 13:12:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:41,413 INFO L459 AbstractCegarLoop]: Abstraction has 197 states and 208 transitions. [2018-03-28 13:12:41,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-03-28 13:12:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 208 transitions. [2018-03-28 13:12:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-03-28 13:12:41,414 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:41,414 INFO L355 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:41,414 INFO L408 AbstractCegarLoop]: === Iteration 14 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1114916091, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:41,420 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:41,463 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 4 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:41,763 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 4 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:42,091 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:42,092 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-03-28 13:12:42,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-03-28 13:12:42,092 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-03-28 13:12:42,092 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=916, Unknown=0, NotChecked=0, Total=1260 [2018-03-28 13:12:42,093 INFO L87 Difference]: Start difference. First operand 197 states and 208 transitions. Second operand 36 states. [2018-03-28 13:12:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:42,968 INFO L93 Difference]: Finished difference Result 384 states and 406 transitions. [2018-03-28 13:12:42,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-03-28 13:12:42,968 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2018-03-28 13:12:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:42,969 INFO L225 Difference]: With dead ends: 384 [2018-03-28 13:12:42,969 INFO L226 Difference]: Without dead ends: 197 [2018-03-28 13:12:42,972 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2018-03-28 13:12:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-03-28 13:12:42,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-03-28 13:12:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-03-28 13:12:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2018-03-28 13:12:42,978 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 100 [2018-03-28 13:12:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:42,979 INFO L459 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2018-03-28 13:12:42,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-03-28 13:12:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2018-03-28 13:12:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-03-28 13:12:42,980 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:42,980 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:42,980 INFO L408 AbstractCegarLoop]: === Iteration 15 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1027630629, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:42,990 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:43,024 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:43,362 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:44,484 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:44,484 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-03-28 13:12:44,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-03-28 13:12:44,484 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-03-28 13:12:44,485 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2018-03-28 13:12:44,485 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand 64 states. [2018-03-28 13:12:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:12:50,072 INFO L93 Difference]: Finished difference Result 410 states and 444 transitions. [2018-03-28 13:12:50,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-03-28 13:12:50,072 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 160 [2018-03-28 13:12:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:12:50,075 INFO L225 Difference]: With dead ends: 410 [2018-03-28 13:12:50,075 INFO L226 Difference]: Without dead ends: 409 [2018-03-28 13:12:50,080 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3452 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4624, Invalid=14282, Unknown=0, NotChecked=0, Total=18906 [2018-03-28 13:12:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2018-03-28 13:12:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 340. [2018-03-28 13:12:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-03-28 13:12:50,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 374 transitions. [2018-03-28 13:12:50,095 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 374 transitions. Word has length 160 [2018-03-28 13:12:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:12:50,095 INFO L459 AbstractCegarLoop]: Abstraction has 340 states and 374 transitions. [2018-03-28 13:12:50,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-03-28 13:12:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 374 transitions. [2018-03-28 13:12:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-03-28 13:12:50,097 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:12:50,097 INFO L355 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:12:50,097 INFO L408 AbstractCegarLoop]: === Iteration 16 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:12:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1791778479, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:12:50,106 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:12:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:12:50,143 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:12:50,153 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-03-28 13:12:50,154 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:12:50,157 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:12:50,157 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:12:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:50,822 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:12:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:12:52,027 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:12:52,027 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-03-28 13:12:52,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-03-28 13:12:52,028 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-03-28 13:12:52,029 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=4424, Unknown=0, NotChecked=0, Total=5112 [2018-03-28 13:12:52,029 INFO L87 Difference]: Start difference. First operand 340 states and 374 transitions. Second operand 72 states. [2018-03-28 13:12:55,086 WARN L151 SmtUtils]: Spent 100ms on a formula simplification. DAG size of input: 120 DAG size of output 26 [2018-03-28 13:13:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:00,758 INFO L93 Difference]: Finished difference Result 390 states and 424 transitions. [2018-03-28 13:13:00,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-03-28 13:13:00,758 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 161 [2018-03-28 13:13:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:00,760 INFO L225 Difference]: With dead ends: 390 [2018-03-28 13:13:00,761 INFO L226 Difference]: Without dead ends: 389 [2018-03-28 13:13:00,766 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5988 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=5601, Invalid=21459, Unknown=0, NotChecked=0, Total=27060 [2018-03-28 13:13:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2018-03-28 13:13:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 341. [2018-03-28 13:13:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-03-28 13:13:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 360 transitions. [2018-03-28 13:13:00,777 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 360 transitions. Word has length 161 [2018-03-28 13:13:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:00,777 INFO L459 AbstractCegarLoop]: Abstraction has 341 states and 360 transitions. [2018-03-28 13:13:00,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-03-28 13:13:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 360 transitions. [2018-03-28 13:13:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-03-28 13:13:00,778 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:00,778 INFO L355 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:00,778 INFO L408 AbstractCegarLoop]: === Iteration 17 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1112528005, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:00,785 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:00,819 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:01,248 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 4 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:01,248 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:13:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 4 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:01,955 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:13:01,956 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2018-03-28 13:13:01,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-03-28 13:13:01,956 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-03-28 13:13:01,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=3364, Unknown=0, NotChecked=0, Total=4556 [2018-03-28 13:13:01,957 INFO L87 Difference]: Start difference. First operand 341 states and 360 transitions. Second operand 68 states. [2018-03-28 13:13:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:04,932 INFO L93 Difference]: Finished difference Result 672 states and 710 transitions. [2018-03-28 13:13:04,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-03-28 13:13:04,932 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 172 [2018-03-28 13:13:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:04,933 INFO L225 Difference]: With dead ends: 672 [2018-03-28 13:13:04,934 INFO L226 Difference]: Without dead ends: 341 [2018-03-28 13:13:04,935 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6512 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6516, Invalid=14364, Unknown=0, NotChecked=0, Total=20880 [2018-03-28 13:13:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-03-28 13:13:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2018-03-28 13:13:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-03-28 13:13:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 344 transitions. [2018-03-28 13:13:04,945 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 344 transitions. Word has length 172 [2018-03-28 13:13:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:04,945 INFO L459 AbstractCegarLoop]: Abstraction has 341 states and 344 transitions. [2018-03-28 13:13:04,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-03-28 13:13:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 344 transitions. [2018-03-28 13:13:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-03-28 13:13:04,946 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:04,946 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:04,947 INFO L408 AbstractCegarLoop]: === Iteration 18 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:04,947 INFO L82 PathProgramCache]: Analyzing trace with hash -695953115, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:04,957 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:05,018 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:06,275 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:13:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:09,779 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:13:09,779 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-03-28 13:13:09,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-03-28 13:13:09,780 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-03-28 13:13:09,781 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=14979, Unknown=0, NotChecked=0, Total=16256 [2018-03-28 13:13:09,781 INFO L87 Difference]: Start difference. First operand 341 states and 344 transitions. Second operand 128 states. [2018-03-28 13:13:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:15,433 INFO L93 Difference]: Finished difference Result 359 states and 363 transitions. [2018-03-28 13:13:15,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-03-28 13:13:15,433 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 304 [2018-03-28 13:13:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:15,435 INFO L225 Difference]: With dead ends: 359 [2018-03-28 13:13:15,436 INFO L226 Difference]: Without dead ends: 358 [2018-03-28 13:13:15,438 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3540, Invalid=32370, Unknown=0, NotChecked=0, Total=35910 [2018-03-28 13:13:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-03-28 13:13:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 349. [2018-03-28 13:13:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2018-03-28 13:13:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 353 transitions. [2018-03-28 13:13:15,453 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 353 transitions. Word has length 304 [2018-03-28 13:13:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:15,454 INFO L459 AbstractCegarLoop]: Abstraction has 349 states and 353 transitions. [2018-03-28 13:13:15,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-03-28 13:13:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 353 transitions. [2018-03-28 13:13:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-03-28 13:13:15,456 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:15,456 INFO L355 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:15,456 INFO L408 AbstractCegarLoop]: === Iteration 19 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash -99710033, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:15,463 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:15,524 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:15,528 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-03-28 13:13:15,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:13:15,532 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:13:15,532 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:13:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4309 backedges. 0 proven. 4309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:17,782 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:13:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4309 backedges. 0 proven. 4309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:21,174 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:13:21,174 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 135 [2018-03-28 13:13:21,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-03-28 13:13:21,175 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-03-28 13:13:21,176 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1423, Invalid=16937, Unknown=0, NotChecked=0, Total=18360 [2018-03-28 13:13:21,176 INFO L87 Difference]: Start difference. First operand 349 states and 353 transitions. Second operand 136 states. [2018-03-28 13:13:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:31,252 INFO L93 Difference]: Finished difference Result 358 states and 362 transitions. [2018-03-28 13:13:31,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-03-28 13:13:31,253 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 305 [2018-03-28 13:13:31,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:31,254 INFO L225 Difference]: With dead ends: 358 [2018-03-28 13:13:31,254 INFO L226 Difference]: Without dead ends: 357 [2018-03-28 13:13:31,256 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11056 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=4956, Invalid=49100, Unknown=0, NotChecked=0, Total=54056 [2018-03-28 13:13:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2018-03-28 13:13:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 350. [2018-03-28 13:13:31,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2018-03-28 13:13:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 354 transitions. [2018-03-28 13:13:31,268 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 354 transitions. Word has length 305 [2018-03-28 13:13:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:31,269 INFO L459 AbstractCegarLoop]: Abstraction has 350 states and 354 transitions. [2018-03-28 13:13:31,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-03-28 13:13:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 354 transitions. [2018-03-28 13:13:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-03-28 13:13:31,270 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:31,270 INFO L355 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:31,270 INFO L408 AbstractCegarLoop]: === Iteration 20 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1086306464, now seen corresponding path program 6 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:31,282 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:31,350 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 4560 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:33,066 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:13:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 4560 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:35,406 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:13:35,407 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [69, 69] imperfect sequences [] total 134 [2018-03-28 13:13:35,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-03-28 13:13:35,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-03-28 13:13:35,408 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3467, Invalid=14355, Unknown=0, NotChecked=0, Total=17822 [2018-03-28 13:13:35,409 INFO L87 Difference]: Start difference. First operand 350 states and 354 transitions. Second operand 134 states. [2018-03-28 13:13:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:39,298 INFO L93 Difference]: Finished difference Result 683 states and 692 transitions. [2018-03-28 13:13:39,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-03-28 13:13:39,299 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 313 [2018-03-28 13:13:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:39,300 INFO L225 Difference]: With dead ends: 683 [2018-03-28 13:13:39,300 INFO L226 Difference]: Without dead ends: 349 [2018-03-28 13:13:39,302 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 491 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12977 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=13102, Invalid=40954, Unknown=0, NotChecked=0, Total=54056 [2018-03-28 13:13:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2018-03-28 13:13:39,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 346. [2018-03-28 13:13:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2018-03-28 13:13:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 349 transitions. [2018-03-28 13:13:39,312 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 349 transitions. Word has length 313 [2018-03-28 13:13:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:39,312 INFO L459 AbstractCegarLoop]: Abstraction has 346 states and 349 transitions. [2018-03-28 13:13:39,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-03-28 13:13:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 349 transitions. [2018-03-28 13:13:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-03-28 13:13:39,314 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:39,315 INFO L355 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:39,315 INFO L408 AbstractCegarLoop]: === Iteration 21 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:39,315 INFO L82 PathProgramCache]: Analyzing trace with hash 803178373, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:39,323 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:39,384 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4251 backedges. 4 proven. 4247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:40,720 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:13:40,934 WARN L148 SmtUtils]: Spent 209ms on a formula simplification that was a NOOP. DAG size: 165 [2018-03-28 13:13:41,169 WARN L148 SmtUtils]: Spent 231ms on a formula simplification that was a NOOP. DAG size: 165 [2018-03-28 13:13:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4251 backedges. 4 proven. 4247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:13:42,410 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:13:42,410 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 131 [2018-03-28 13:13:42,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-03-28 13:13:42,411 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-03-28 13:13:42,412 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3396, Invalid=13634, Unknown=0, NotChecked=0, Total=17030 [2018-03-28 13:13:42,412 INFO L87 Difference]: Start difference. First operand 346 states and 349 transitions. Second operand 131 states. [2018-03-28 13:13:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:44,408 INFO L93 Difference]: Finished difference Result 679 states and 685 transitions. [2018-03-28 13:13:44,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-03-28 13:13:44,408 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 316 [2018-03-28 13:13:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:44,411 INFO L225 Difference]: With dead ends: 679 [2018-03-28 13:13:44,411 INFO L226 Difference]: Without dead ends: 346 [2018-03-28 13:13:44,414 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 500 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14761 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9634, Invalid=27808, Unknown=0, NotChecked=0, Total=37442 [2018-03-28 13:13:44,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-03-28 13:13:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2018-03-28 13:13:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2018-03-28 13:13:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 348 transitions. [2018-03-28 13:13:44,428 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 348 transitions. Word has length 316 [2018-03-28 13:13:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:44,429 INFO L459 AbstractCegarLoop]: Abstraction has 346 states and 348 transitions. [2018-03-28 13:13:44,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-03-28 13:13:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 348 transitions. [2018-03-28 13:13:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-03-28 13:13:44,431 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:44,431 INFO L355 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:44,431 INFO L408 AbstractCegarLoop]: === Iteration 22 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:44,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1873262976, now seen corresponding path program 6 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:44,440 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:44,513 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4532 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4528 trivial. 0 not checked. [2018-03-28 13:13:44,582 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:13:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4532 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4528 trivial. 0 not checked. [2018-03-28 13:13:44,664 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:13:44,664 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-03-28 13:13:44,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-03-28 13:13:44,665 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-03-28 13:13:44,665 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-03-28 13:13:44,665 INFO L87 Difference]: Start difference. First operand 346 states and 348 transitions. Second operand 9 states. [2018-03-28 13:13:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:44,730 INFO L93 Difference]: Finished difference Result 362 states and 364 transitions. [2018-03-28 13:13:44,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-03-28 13:13:44,730 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 325 [2018-03-28 13:13:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:44,732 INFO L225 Difference]: With dead ends: 362 [2018-03-28 13:13:44,732 INFO L226 Difference]: Without dead ends: 361 [2018-03-28 13:13:44,732 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 641 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-03-28 13:13:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2018-03-28 13:13:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 343. [2018-03-28 13:13:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-03-28 13:13:44,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2018-03-28 13:13:44,742 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 325 [2018-03-28 13:13:44,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:44,742 INFO L459 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2018-03-28 13:13:44,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-03-28 13:13:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2018-03-28 13:13:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-03-28 13:13:44,745 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:44,745 INFO L355 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:44,745 INFO L408 AbstractCegarLoop]: === Iteration 23 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:44,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1230984506, now seen corresponding path program 1 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:44,754 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:44,829 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4528 trivial. 0 not checked. [2018-03-28 13:13:44,899 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:13:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4528 trivial. 0 not checked. [2018-03-28 13:13:44,983 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:13:44,983 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-03-28 13:13:44,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-03-28 13:13:44,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-03-28 13:13:44,984 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-03-28 13:13:44,984 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand 8 states. [2018-03-28 13:13:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:45,063 INFO L93 Difference]: Finished difference Result 395 states and 401 transitions. [2018-03-28 13:13:45,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-28 13:13:45,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2018-03-28 13:13:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:45,065 INFO L225 Difference]: With dead ends: 395 [2018-03-28 13:13:45,065 INFO L226 Difference]: Without dead ends: 375 [2018-03-28 13:13:45,065 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-03-28 13:13:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-03-28 13:13:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 365. [2018-03-28 13:13:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2018-03-28 13:13:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 369 transitions. [2018-03-28 13:13:45,075 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 369 transitions. Word has length 332 [2018-03-28 13:13:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:45,075 INFO L459 AbstractCegarLoop]: Abstraction has 365 states and 369 transitions. [2018-03-28 13:13:45,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-03-28 13:13:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 369 transitions. [2018-03-28 13:13:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2018-03-28 13:13:45,083 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:45,083 INFO L355 BasicCegarLoop]: trace histogram [99, 96, 96, 96, 96, 96, 96, 96, 96, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:45,083 INFO L408 AbstractCegarLoop]: === Iteration 24 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:45,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2111731802, now seen corresponding path program 2 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:45,090 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:45,287 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 41685 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 41646 trivial. 0 not checked. [2018-03-28 13:13:45,664 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:13:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 41685 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 41646 trivial. 0 not checked. [2018-03-28 13:13:46,093 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:13:46,094 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-03-28 13:13:46,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-28 13:13:46,095 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-28 13:13:46,095 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-03-28 13:13:46,095 INFO L87 Difference]: Start difference. First operand 365 states and 369 transitions. Second operand 16 states. [2018-03-28 13:13:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:46,247 INFO L93 Difference]: Finished difference Result 439 states and 451 transitions. [2018-03-28 13:13:46,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-28 13:13:46,247 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 950 [2018-03-28 13:13:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:46,249 INFO L225 Difference]: With dead ends: 439 [2018-03-28 13:13:46,249 INFO L226 Difference]: Without dead ends: 419 [2018-03-28 13:13:46,250 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1911 GetRequests, 1885 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2018-03-28 13:13:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-03-28 13:13:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 409. [2018-03-28 13:13:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2018-03-28 13:13:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 417 transitions. [2018-03-28 13:13:46,263 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 417 transitions. Word has length 950 [2018-03-28 13:13:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:46,264 INFO L459 AbstractCegarLoop]: Abstraction has 409 states and 417 transitions. [2018-03-28 13:13:46,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-28 13:13:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 417 transitions. [2018-03-28 13:13:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2187 [2018-03-28 13:13:46,290 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:46,291 INFO L355 BasicCegarLoop]: trace histogram [231, 224, 224, 224, 224, 224, 224, 224, 224, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:46,291 INFO L408 AbstractCegarLoop]: === Iteration 25 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:46,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1746794854, now seen corresponding path program 3 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:46,298 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:46,754 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 228375 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 228130 trivial. 0 not checked. [2018-03-28 13:13:48,331 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:13:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 228375 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 228130 trivial. 0 not checked. [2018-03-28 13:13:49,934 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:13:49,935 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-03-28 13:13:49,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-03-28 13:13:49,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-03-28 13:13:49,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2018-03-28 13:13:49,937 INFO L87 Difference]: Start difference. First operand 409 states and 417 transitions. Second operand 32 states. [2018-03-28 13:13:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:13:50,867 INFO L93 Difference]: Finished difference Result 527 states and 551 transitions. [2018-03-28 13:13:50,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-28 13:13:50,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 2186 [2018-03-28 13:13:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:13:50,871 INFO L225 Difference]: With dead ends: 527 [2018-03-28 13:13:50,871 INFO L226 Difference]: Without dead ends: 507 [2018-03-28 13:13:50,872 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4399 GetRequests, 4341 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1155, Invalid=2385, Unknown=0, NotChecked=0, Total=3540 [2018-03-28 13:13:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-03-28 13:13:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 497. [2018-03-28 13:13:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2018-03-28 13:13:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 513 transitions. [2018-03-28 13:13:50,888 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 513 transitions. Word has length 2186 [2018-03-28 13:13:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:13:50,889 INFO L459 AbstractCegarLoop]: Abstraction has 497 states and 513 transitions. [2018-03-28 13:13:50,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-03-28 13:13:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 513 transitions. [2018-03-28 13:13:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4659 [2018-03-28 13:13:50,997 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:13:50,998 INFO L355 BasicCegarLoop]: trace histogram [495, 480, 480, 480, 480, 480, 480, 480, 480, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:13:50,999 INFO L408 AbstractCegarLoop]: === Iteration 26 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:13:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash -214547686, now seen corresponding path program 4 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:13:51,012 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:13:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:13:51,976 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:13:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1051275 backedges. 0 proven. 1185 refuted. 0 times theorem prover too weak. 1050090 trivial. 0 not checked. [2018-03-28 13:13:58,250 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:14:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1051275 backedges. 0 proven. 1185 refuted. 0 times theorem prover too weak. 1050090 trivial. 0 not checked. [2018-03-28 13:14:04,338 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:14:04,344 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-03-28 13:14:04,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-03-28 13:14:04,347 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-03-28 13:14:04,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2018-03-28 13:14:04,348 INFO L87 Difference]: Start difference. First operand 497 states and 513 transitions. Second operand 64 states. [2018-03-28 13:14:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:14:05,633 INFO L93 Difference]: Finished difference Result 703 states and 751 transitions. [2018-03-28 13:14:05,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-03-28 13:14:05,633 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 4658 [2018-03-28 13:14:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:14:05,641 INFO L225 Difference]: With dead ends: 703 [2018-03-28 13:14:05,642 INFO L226 Difference]: Without dead ends: 683 [2018-03-28 13:14:05,645 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 9375 GetRequests, 9253 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4867, Invalid=10385, Unknown=0, NotChecked=0, Total=15252 [2018-03-28 13:14:05,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-03-28 13:14:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 673. [2018-03-28 13:14:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 673 states. [2018-03-28 13:14:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 705 transitions. [2018-03-28 13:14:05,685 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 705 transitions. Word has length 4658 [2018-03-28 13:14:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:14:05,688 INFO L459 AbstractCegarLoop]: Abstraction has 673 states and 705 transitions. [2018-03-28 13:14:05,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-03-28 13:14:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 705 transitions. [2018-03-28 13:14:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9603 [2018-03-28 13:14:06,150 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:14:06,153 INFO L355 BasicCegarLoop]: trace histogram [1023, 992, 992, 992, 992, 992, 992, 992, 992, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:14:06,153 INFO L408 AbstractCegarLoop]: === Iteration 27 === [__U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr1RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr2RequiresViolation, __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__fooErr0AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2EnsuresViolationMEMORY_LEAK, mainErr0AssertViolationARRAY_INDEX]=== [2018-03-28 13:14:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash -321700838, now seen corresponding path program 5 times No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:14:06,160 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:14:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:14:07,837 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:14:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4495155 backedges. 0 proven. 5177 refuted. 0 times theorem prover too weak. 4489978 trivial. 0 not checked. [2018-03-28 13:14:32,085 INFO L314 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown