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/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4cf2d92 [2018-03-28 13:09:44,201 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-03-28 13:09:44,203 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-03-28 13:09:44,218 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-03-28 13:09:44,218 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-03-28 13:09:44,219 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-03-28 13:09:44,221 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-03-28 13:09:44,223 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-03-28 13:09:44,225 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-03-28 13:09:44,226 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-03-28 13:09:44,227 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-03-28 13:09:44,227 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-03-28 13:09:44,228 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-03-28 13:09:44,229 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-03-28 13:09:44,230 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-03-28 13:09:44,233 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-03-28 13:09:44,235 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-03-28 13:09:44,237 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-03-28 13:09:44,238 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-03-28 13:09:44,239 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-03-28 13:09:44,242 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-03-28 13:09:44,242 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-03-28 13:09:44,242 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-03-28 13:09:44,244 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-03-28 13:09:44,245 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-03-28 13:09:44,247 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-03-28 13:09:44,247 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-03-28 13:09:44,248 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-03-28 13:09:44,249 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-03-28 13:09:44,249 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-03-28 13:09:44,250 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-03-28 13:09:44,250 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 13:09:44,276 INFO L110 SettingsManager]: Loading preferences was successful [2018-03-28 13:09:44,276 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-03-28 13:09:44,276 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-03-28 13:09:44,276 INFO L133 SettingsManager]: * ultimate.logging.details=de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation=DEBUG; [2018-03-28 13:09:44,277 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-03-28 13:09:44,277 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-03-28 13:09:44,278 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-03-28 13:09:44,278 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-03-28 13:09:44,278 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-03-28 13:09:44,278 INFO L131 SettingsManager]: Preferences of LTL2Aut differ from their defaults: [2018-03-28 13:09:44,279 INFO L133 SettingsManager]: * Property to check=[] a a: x > 42 [2018-03-28 13:09:44,279 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-03-28 13:09:44,279 INFO L133 SettingsManager]: * sizeof long=4 [2018-03-28 13:09:44,279 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-03-28 13:09:44,280 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-03-28 13:09:44,280 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-03-28 13:09:44,280 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-03-28 13:09:44,280 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-03-28 13:09:44,280 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-03-28 13:09:44,281 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-03-28 13:09:44,281 INFO L133 SettingsManager]: * sizeof long double=12 [2018-03-28 13:09:44,281 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-03-28 13:09:44,281 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-03-28 13:09:44,281 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-03-28 13:09:44,282 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-03-28 13:09:44,282 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-03-28 13:09:44,282 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-03-28 13:09:44,282 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-03-28 13:09:44,282 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-03-28 13:09:44,283 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-03-28 13:09:44,283 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-03-28 13:09:44,283 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-03-28 13:09:44,283 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-03-28 13:09:44,284 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-03-28 13:09:44,284 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-03-28 13:09:44,284 INFO L131 SettingsManager]: Preferences of Boogie Printer differ from their defaults: [2018-03-28 13:09:44,285 INFO L133 SettingsManager]: * Dump path:=C:\Users\alex\AppData\Local\Temp\ [2018-03-28 13:09:44,321 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-03-28 13:09:44,334 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-03-28 13:09:44,339 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-03-28 13:09:44,340 INFO L271 PluginConnector]: Initializing CDTParser... [2018-03-28 13:09:44,341 INFO L276 PluginConnector]: CDTParser initialized [2018-03-28 13:09:44,342 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-03-28 13:09:44,683 INFO L228 CDTParser]: Created temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG107dfb974 [2018-03-28 13:09:44,838 INFO L291 CDTParser]: IsIndexed: true [2018-03-28 13:09:44,838 INFO L292 CDTParser]: Found 1 translation units. [2018-03-28 13:09:44,838 INFO L171 CDTParser]: Scanning ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-03-28 13:09:44,839 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-03-28 13:09:44,839 INFO L215 ultiparseSymbolTable]: [2018-03-28 13:09:44,840 INFO L218 ultiparseSymbolTable]: Function table: [2018-03-28 13:09:44,840 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__foo ('foo') in ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-03-28 13:09:44,840 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-03-28 13:09:44,840 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-03-28 13:09:44,840 INFO L233 ultiparseSymbolTable]: [2018-03-28 13:09:44,877 INFO L334 CDTParser]: Deleted temporary CDT project at /storage/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAG107dfb974 [2018-03-28 13:09:44,882 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-03-28 13:09:44,886 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-03-28 13:09:44,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-03-28 13:09:44,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-03-28 13:09:44,892 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-03-28 13:09:44,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.03 01:09:44" (1/1) ... [2018-03-28 13:09:44,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72b0ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:44, skipping insertion in model container [2018-03-28 13:09:44,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.03 01:09:44" (1/1) ... [2018-03-28 13:09:44,909 INFO L167 Dispatcher]: Using SV-COMP mode [2018-03-28 13:09:44,924 INFO L167 Dispatcher]: Using SV-COMP mode [2018-03-28 13:09:45,070 INFO L175 PostProcessor]: Settings: Checked method=main [2018-03-28 13:09:45,094 INFO L175 PostProcessor]: Settings: Checked method=main [2018-03-28 13:09:45,099 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 9 non ball SCCs. Number of states in SCCs 9. [2018-03-28 13:09:45,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45 WrapperNode [2018-03-28 13:09:45,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-03-28 13:09:45,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-03-28 13:09:45,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-03-28 13:09:45,108 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-03-28 13:09:45,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45" (1/1) ... [2018-03-28 13:09:45,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45" (1/1) ... [2018-03-28 13:09:45,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45" (1/1) ... [2018-03-28 13:09:45,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45" (1/1) ... [2018-03-28 13:09:45,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45" (1/1) ... [2018-03-28 13:09:45,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45" (1/1) ... [2018-03-28 13:09:45,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45" (1/1) ... [2018-03-28 13:09:45,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-03-28 13:09:45,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-03-28 13:09:45,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-03-28 13:09:45,145 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-03-28 13:09:45,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45" (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 13:09:45,197 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-03-28 13:09:45,198 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-03-28 13:09:45,198 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__foo [2018-03-28 13:09:45,198 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-03-28 13:09:45,198 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fArraysOfVariableLength__true_valid_memsafety_true_termination_c__foo [2018-03-28 13:09:45,198 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-03-28 13:09:45,198 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-03-28 13:09:45,198 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-03-28 13:09:45,199 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-03-28 13:09:45,199 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-03-28 13:09:45,199 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-03-28 13:09:45,199 INFO L128 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2018-03-28 13:09:45,199 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-03-28 13:09:45,495 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-03-28 13:09:45,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.03 01:09:45 BoogieIcfgContainer [2018-03-28 13:09:45,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-03-28 13:09:45,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-03-28 13:09:45,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-03-28 13:09:45,500 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-03-28 13:09:45,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.03 01:09:44" (1/3) ... [2018-03-28 13:09:45,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7421e0cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.03 01:09:45, skipping insertion in model container [2018-03-28 13:09:45,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.03 01:09:45" (2/3) ... [2018-03-28 13:09:45,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7421e0cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.03 01:09:45, skipping insertion in model container [2018-03-28 13:09:45,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.03 01:09:45" (3/3) ... [2018-03-28 13:09:45,503 INFO L107 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4_true-valid-memsafety_true-termination.c [2018-03-28 13:09:45,513 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-03-28 13:09:45,519 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-03-28 13:09:45,564 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-03-28 13:09:45,564 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-03-28 13:09:45,564 INFO L370 AbstractCegarLoop]: Hoare is true [2018-03-28 13:09:45,564 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-03-28 13:09:45,565 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-03-28 13:09:45,565 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-03-28 13:09:45,565 INFO L374 AbstractCegarLoop]: Difference is false [2018-03-28 13:09:45,565 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-03-28 13:09:45,565 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-03-28 13:09:45,566 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-03-28 13:09:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-03-28 13:09:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-03-28 13:09:45,584 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:45,584 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:09:45,584 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 13:09:45,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1440860085, 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 13:09:45,610 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:45,648 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:45,710 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 13:09:45,710 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:09:45,756 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:09:45,757 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-03-28 13:09:45,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-03-28 13:09:45,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-03-28 13:09:45,770 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-03-28 13:09:45,772 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 5 states. [2018-03-28 13:09:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:45,889 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2018-03-28 13:09:45,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-03-28 13:09:45,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-03-28 13:09:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:45,901 INFO L225 Difference]: With dead ends: 137 [2018-03-28 13:09:45,902 INFO L226 Difference]: Without dead ends: 81 [2018-03-28 13:09:45,905 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 13:09:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-03-28 13:09:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2018-03-28 13:09:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-03-28 13:09:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2018-03-28 13:09:45,947 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 14 [2018-03-28 13:09:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:45,947 INFO L459 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2018-03-28 13:09:45,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-03-28 13:09:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2018-03-28 13:09:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-03-28 13:09:45,949 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:45,949 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] [2018-03-28 13:09:45,949 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 13:09:45,949 INFO L82 PathProgramCache]: Analyzing trace with hash -658382786, 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 13:09:45,963 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:45,994 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:46,002 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 13:09:46,002 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:46,028 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 13:09:46,060 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:09:46,060 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2018-03-28 13:09:46,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-03-28 13:09:46,062 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-03-28 13:09:46,062 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-03-28 13:09:46,062 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 4 states. [2018-03-28 13:09:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:46,149 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-03-28 13:09:46,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-03-28 13:09:46,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-03-28 13:09:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:46,153 INFO L225 Difference]: With dead ends: 79 [2018-03-28 13:09:46,153 INFO L226 Difference]: Without dead ends: 78 [2018-03-28 13:09:46,154 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 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 13:09:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-03-28 13:09:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2018-03-28 13:09:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-03-28 13:09:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2018-03-28 13:09:46,197 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 23 [2018-03-28 13:09:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:46,197 INFO L459 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2018-03-28 13:09:46,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-03-28 13:09:46,202 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2018-03-28 13:09:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-03-28 13:09:46,203 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:46,203 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] [2018-03-28 13:09:46,203 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 13:09:46,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1064970165, 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 13:09:46,212 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:46,240 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:46,265 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 13:09:46,268 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:09:46,270 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:09:46,271 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-03-28 13:09:46,286 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 13:09:46,286 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:46,295 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 13:09:46,318 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:09:46,319 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2018-03-28 13:09:46,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-03-28 13:09:46,319 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-03-28 13:09:46,320 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-03-28 13:09:46,320 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 5 states. [2018-03-28 13:09:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:46,386 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2018-03-28 13:09:46,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-03-28 13:09:46,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-03-28 13:09:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:46,387 INFO L225 Difference]: With dead ends: 68 [2018-03-28 13:09:46,388 INFO L226 Difference]: Without dead ends: 67 [2018-03-28 13:09:46,388 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-03-28 13:09:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-03-28 13:09:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-03-28 13:09:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-03-28 13:09:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2018-03-28 13:09:46,397 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 24 [2018-03-28 13:09:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:46,397 INFO L459 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2018-03-28 13:09:46,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-03-28 13:09:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2018-03-28 13:09:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-03-28 13:09:46,398 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:46,399 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] [2018-03-28 13:09:46,399 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 13:09:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1064970166, 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 13:09:46,412 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:46,432 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:46,445 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 13:09:46,445 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:09:46,449 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:09:46,450 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:09:46,482 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 13:09:46,483 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:46,595 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 13:09:46,615 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:09:46,616 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2018-03-28 13:09:46,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-03-28 13:09:46,616 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-03-28 13:09:46,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-03-28 13:09:46,617 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 10 states. [2018-03-28 13:09:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:46,749 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-03-28 13:09:46,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-03-28 13:09:46,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-03-28 13:09:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:46,751 INFO L225 Difference]: With dead ends: 76 [2018-03-28 13:09:46,751 INFO L226 Difference]: Without dead ends: 75 [2018-03-28 13:09:46,752 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2018-03-28 13:09:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-03-28 13:09:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2018-03-28 13:09:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-03-28 13:09:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2018-03-28 13:09:46,765 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 24 [2018-03-28 13:09:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:46,766 INFO L459 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2018-03-28 13:09:46,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-03-28 13:09:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2018-03-28 13:09:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-03-28 13:09:46,767 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:46,768 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] [2018-03-28 13:09:46,768 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 13:09:46,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1397858905, 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 13:09:46,778 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:46,803 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:46,839 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 13:09:46,839 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:46,917 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 13:09:46,939 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:46,939 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-03-28 13:09:46,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-03-28 13:09:46,940 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-03-28 13:09:46,940 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-03-28 13:09:46,940 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 8 states. [2018-03-28 13:09:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:47,069 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2018-03-28 13:09:47,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-28 13:09:47,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-03-28 13:09:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:47,071 INFO L225 Difference]: With dead ends: 102 [2018-03-28 13:09:47,072 INFO L226 Difference]: Without dead ends: 101 [2018-03-28 13:09:47,073 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 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 13:09:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-03-28 13:09:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2018-03-28 13:09:47,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-03-28 13:09:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2018-03-28 13:09:47,083 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 32 [2018-03-28 13:09:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:47,083 INFO L459 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2018-03-28 13:09:47,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-03-28 13:09:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2018-03-28 13:09:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-03-28 13:09:47,085 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:47,085 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] [2018-03-28 13:09:47,085 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 13:09:47,085 INFO L82 PathProgramCache]: Analyzing trace with hash -383953043, 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 13:09:47,100 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:47,119 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:47,124 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 13:09:47,124 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:09:47,131 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:09:47,131 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:09:47,205 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 13:09:47,206 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:47,310 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 13:09:47,332 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:47,332 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-03-28 13:09:47,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-03-28 13:09:47,333 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-03-28 13:09:47,333 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-03-28 13:09:47,333 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 14 states. [2018-03-28 13:09:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:47,618 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2018-03-28 13:09:47,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-03-28 13:09:47,618 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2018-03-28 13:09:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:47,619 INFO L225 Difference]: With dead ends: 96 [2018-03-28 13:09:47,620 INFO L226 Difference]: Without dead ends: 95 [2018-03-28 13:09:47,620 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2018-03-28 13:09:47,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-03-28 13:09:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2018-03-28 13:09:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-03-28 13:09:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2018-03-28 13:09:47,629 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 33 [2018-03-28 13:09:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:47,629 INFO L459 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2018-03-28 13:09:47,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-03-28 13:09:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2018-03-28 13:09:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-03-28 13:09:47,631 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:47,631 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 13:09:47,631 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 13:09:47,631 INFO L82 PathProgramCache]: Analyzing trace with hash 402779255, 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 13:09:47,639 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:47,650 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:09:47,665 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:09:47,723 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:09:47,723 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-03-28 13:09:47,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-03-28 13:09:47,724 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-03-28 13:09:47,724 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-03-28 13:09:47,724 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 8 states. [2018-03-28 13:09:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:47,768 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2018-03-28 13:09:47,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-03-28 13:09:47,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2018-03-28 13:09:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:47,770 INFO L225 Difference]: With dead ends: 161 [2018-03-28 13:09:47,770 INFO L226 Difference]: Without dead ends: 86 [2018-03-28 13:09:47,771 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 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 13:09:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-03-28 13:09:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-03-28 13:09:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-03-28 13:09:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2018-03-28 13:09:47,780 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 34 [2018-03-28 13:09:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:47,780 INFO L459 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2018-03-28 13:09:47,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-03-28 13:09:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2018-03-28 13:09:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-03-28 13:09:47,782 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:47,783 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, 1, 1, 1, 1, 1, 1] [2018-03-28 13:09:47,783 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 13:09:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1104010386, 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 13:09:47,790 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:47,806 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:09:47,842 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:09:47,918 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:47,918 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-03-28 13:09:47,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-03-28 13:09:47,919 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-03-28 13:09:47,919 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-03-28 13:09:47,919 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand 12 states. [2018-03-28 13:09:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:48,036 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2018-03-28 13:09:48,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-03-28 13:09:48,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2018-03-28 13:09:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:48,037 INFO L225 Difference]: With dead ends: 164 [2018-03-28 13:09:48,037 INFO L226 Difference]: Without dead ends: 86 [2018-03-28 13:09:48,038 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 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 13:09:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-03-28 13:09:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-03-28 13:09:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-03-28 13:09:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2018-03-28 13:09:48,043 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 43 [2018-03-28 13:09:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:48,044 INFO L459 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2018-03-28 13:09:48,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-03-28 13:09:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2018-03-28 13:09:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-03-28 13:09:48,045 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:48,045 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] [2018-03-28 13:09:48,045 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 13:09:48,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1311193991, 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 13:09:48,050 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:48,069 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:48,107 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 13:09:48,107 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:48,221 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 13:09:48,251 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:48,251 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-03-28 13:09:48,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-28 13:09:48,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-28 13:09:48,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-03-28 13:09:48,252 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 16 states. [2018-03-28 13:09:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:48,608 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2018-03-28 13:09:48,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-28 13:09:48,609 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2018-03-28 13:09:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:48,610 INFO L225 Difference]: With dead ends: 143 [2018-03-28 13:09:48,610 INFO L226 Difference]: Without dead ends: 142 [2018-03-28 13:09:48,611 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 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 13:09:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-03-28 13:09:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2018-03-28 13:09:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-03-28 13:09:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2018-03-28 13:09:48,622 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 50 [2018-03-28 13:09:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:48,622 INFO L459 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2018-03-28 13:09:48,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-28 13:09:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2018-03-28 13:09:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-03-28 13:09:48,624 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:48,624 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] [2018-03-28 13:09:48,624 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 13:09:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1992308109, 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 13:09:48,632 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:48,650 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:48,656 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 13:09:48,656 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:09:48,660 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:09:48,660 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:09:48,796 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 13:09:48,796 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:49,012 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 13:09:49,034 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:49,034 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-03-28 13:09:49,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-03-28 13:09:49,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-03-28 13:09:49,034 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2018-03-28 13:09:49,035 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 22 states. [2018-03-28 13:09:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:49,760 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2018-03-28 13:09:49,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-03-28 13:09:49,761 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2018-03-28 13:09:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:49,762 INFO L225 Difference]: With dead ends: 135 [2018-03-28 13:09:49,762 INFO L226 Difference]: Without dead ends: 134 [2018-03-28 13:09:49,763 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=430, Invalid=1292, Unknown=0, NotChecked=0, Total=1722 [2018-03-28 13:09:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-03-28 13:09:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 122. [2018-03-28 13:09:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-03-28 13:09:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2018-03-28 13:09:49,770 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 51 [2018-03-28 13:09:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:49,770 INFO L459 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2018-03-28 13:09:49,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-03-28 13:09:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2018-03-28 13:09:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-03-28 13:09:49,772 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:49,772 INFO L355 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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 13:09:49,772 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 13:09:49,772 INFO L82 PathProgramCache]: Analyzing trace with hash 418240910, 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 13:09:49,781 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:49,798 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:09:49,896 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:09:50,018 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:50,018 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-03-28 13:09:50,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-03-28 13:09:50,019 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-03-28 13:09:50,019 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2018-03-28 13:09:50,019 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand 20 states. [2018-03-28 13:09:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:50,341 INFO L93 Difference]: Finished difference Result 236 states and 250 transitions. [2018-03-28 13:09:50,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-03-28 13:09:50,342 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2018-03-28 13:09:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:50,343 INFO L225 Difference]: With dead ends: 236 [2018-03-28 13:09:50,343 INFO L226 Difference]: Without dead ends: 122 [2018-03-28 13:09:50,344 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 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 13:09:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-03-28 13:09:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-03-28 13:09:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-03-28 13:09:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2018-03-28 13:09:50,353 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 61 [2018-03-28 13:09:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:50,354 INFO L459 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2018-03-28 13:09:50,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-03-28 13:09:50,354 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2018-03-28 13:09:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-03-28 13:09:50,355 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:50,355 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] [2018-03-28 13:09:50,356 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 13:09:50,356 INFO L82 PathProgramCache]: Analyzing trace with hash -419442873, 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 13:09:50,361 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:50,385 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:50,530 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 13:09:50,530 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:50,806 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 13:09:50,830 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:50,831 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-03-28 13:09:50,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-03-28 13:09:50,831 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-03-28 13:09:50,832 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2018-03-28 13:09:50,832 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 32 states. [2018-03-28 13:09:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:51,976 INFO L93 Difference]: Finished difference Result 231 states and 249 transitions. [2018-03-28 13:09:51,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-28 13:09:51,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 86 [2018-03-28 13:09:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:51,978 INFO L225 Difference]: With dead ends: 231 [2018-03-28 13:09:51,979 INFO L226 Difference]: Without dead ends: 230 [2018-03-28 13:09:51,980 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 141 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 13:09:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2018-03-28 13:09:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 193. [2018-03-28 13:09:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-03-28 13:09:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2018-03-28 13:09:51,989 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 86 [2018-03-28 13:09:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:51,989 INFO L459 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2018-03-28 13:09:51,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-03-28 13:09:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2018-03-28 13:09:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-03-28 13:09:51,990 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:51,990 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] [2018-03-28 13:09:51,990 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 13:09:51,991 INFO L82 PathProgramCache]: Analyzing trace with hash -117827123, 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 13:09:51,996 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:52,019 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:52,022 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 13:09:52,023 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:09:52,026 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:09:52,026 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:09:52,225 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 13:09:52,226 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:52,556 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 13:09:52,577 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:52,577 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-03-28 13:09:52,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-03-28 13:09:52,578 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-03-28 13:09:52,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2018-03-28 13:09:52,578 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand 38 states. [2018-03-28 13:09:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:55,086 INFO L93 Difference]: Finished difference Result 219 states and 237 transitions. [2018-03-28 13:09:55,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-03-28 13:09:55,086 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 87 [2018-03-28 13:09:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:55,088 INFO L225 Difference]: With dead ends: 219 [2018-03-28 13:09:55,088 INFO L226 Difference]: Without dead ends: 218 [2018-03-28 13:09:55,090 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1510, Invalid=5132, Unknown=0, NotChecked=0, Total=6642 [2018-03-28 13:09:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-03-28 13:09:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 194. [2018-03-28 13:09:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-03-28 13:09:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 205 transitions. [2018-03-28 13:09:55,099 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 205 transitions. Word has length 87 [2018-03-28 13:09:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:55,100 INFO L459 AbstractCegarLoop]: Abstraction has 194 states and 205 transitions. [2018-03-28 13:09:55,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-03-28 13:09:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 205 transitions. [2018-03-28 13:09:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-03-28 13:09:55,101 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:55,101 INFO L355 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 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 13:09:55,101 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 13:09:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash -800625202, 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 13:09:55,107 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:55,128 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 3 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:09:55,273 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 3 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:09:55,653 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:55,653 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2018-03-28 13:09:55,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-03-28 13:09:55,654 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-03-28 13:09:55,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=916, Unknown=0, NotChecked=0, Total=1260 [2018-03-28 13:09:55,654 INFO L87 Difference]: Start difference. First operand 194 states and 205 transitions. Second operand 36 states. [2018-03-28 13:09:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:09:56,678 INFO L93 Difference]: Finished difference Result 380 states and 402 transitions. [2018-03-28 13:09:56,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-03-28 13:09:56,678 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 97 [2018-03-28 13:09:56,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:09:56,679 INFO L225 Difference]: With dead ends: 380 [2018-03-28 13:09:56,679 INFO L226 Difference]: Without dead ends: 194 [2018-03-28 13:09:56,681 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2018-03-28 13:09:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-03-28 13:09:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2018-03-28 13:09:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-03-28 13:09:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 197 transitions. [2018-03-28 13:09:56,687 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 197 transitions. Word has length 97 [2018-03-28 13:09:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:09:56,688 INFO L459 AbstractCegarLoop]: Abstraction has 194 states and 197 transitions. [2018-03-28 13:09:56,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-03-28 13:09:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 197 transitions. [2018-03-28 13:09:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-03-28 13:09:56,689 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:09:56,689 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] [2018-03-28 13:09:56,689 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 13:09:56,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1349232953, 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 13:09:56,695 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:09:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:09:56,729 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:09:57,048 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 13:09:57,049 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:09:57,986 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 13:09:58,008 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:09:58,008 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-03-28 13:09:58,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-03-28 13:09:58,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-03-28 13:09:58,010 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2018-03-28 13:09:58,010 INFO L87 Difference]: Start difference. First operand 194 states and 197 transitions. Second operand 64 states. [2018-03-28 13:10:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:03,669 INFO L93 Difference]: Finished difference Result 407 states and 441 transitions. [2018-03-28 13:10:03,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-03-28 13:10:03,670 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 158 [2018-03-28 13:10:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:03,673 INFO L225 Difference]: With dead ends: 407 [2018-03-28 13:10:03,673 INFO L226 Difference]: Without dead ends: 406 [2018-03-28 13:10:03,676 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 253 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 13:10:03,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2018-03-28 13:10:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 337. [2018-03-28 13:10:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2018-03-28 13:10:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 371 transitions. [2018-03-28 13:10:03,697 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 371 transitions. Word has length 158 [2018-03-28 13:10:03,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:03,697 INFO L459 AbstractCegarLoop]: Abstraction has 337 states and 371 transitions. [2018-03-28 13:10:03,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-03-28 13:10:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 371 transitions. [2018-03-28 13:10:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-03-28 13:10:03,699 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:03,700 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] [2018-03-28 13:10:03,700 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 13:10:03,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1123451469, 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 13:10:03,709 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:10:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:10:03,741 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:10:03,744 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 13:10:03,745 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:10:03,747 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:10:03,748 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:10:04,380 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 13:10:04,380 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:10:05,495 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 13:10:05,518 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:10:05,518 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-03-28 13:10:05,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-03-28 13:10:05,519 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-03-28 13:10:05,520 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=4147, Unknown=0, NotChecked=0, Total=4830 [2018-03-28 13:10:05,521 INFO L87 Difference]: Start difference. First operand 337 states and 371 transitions. Second operand 70 states. [2018-03-28 13:10:09,333 WARN L151 SmtUtils]: Spent 100ms on a formula simplification. DAG size of input: 124 DAG size of output 27 [2018-03-28 13:10:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:15,268 INFO L93 Difference]: Finished difference Result 387 states and 421 transitions. [2018-03-28 13:10:15,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-03-28 13:10:15,268 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 159 [2018-03-28 13:10:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:15,271 INFO L225 Difference]: With dead ends: 387 [2018-03-28 13:10:15,271 INFO L226 Difference]: Without dead ends: 386 [2018-03-28 13:10:15,275 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5800 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=5590, Invalid=20492, Unknown=0, NotChecked=0, Total=26082 [2018-03-28 13:10:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-03-28 13:10:15,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 338. [2018-03-28 13:10:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-03-28 13:10:15,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 357 transitions. [2018-03-28 13:10:15,284 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 357 transitions. Word has length 159 [2018-03-28 13:10:15,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:15,285 INFO L459 AbstractCegarLoop]: Abstraction has 338 states and 357 transitions. [2018-03-28 13:10:15,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-03-28 13:10:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 357 transitions. [2018-03-28 13:10:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-03-28 13:10:15,286 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:15,286 INFO L355 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 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 13:10:15,286 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 13:10:15,286 INFO L82 PathProgramCache]: Analyzing trace with hash 708523598, 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 13:10:15,292 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:10:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:10:15,323 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:10:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 3 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:10:15,736 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:10:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 3 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:10:16,451 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:10:16,451 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2018-03-28 13:10:16,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-03-28 13:10:16,452 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-03-28 13:10:16,452 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=3364, Unknown=0, NotChecked=0, Total=4556 [2018-03-28 13:10:16,453 INFO L87 Difference]: Start difference. First operand 338 states and 357 transitions. Second operand 68 states. [2018-03-28 13:10:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:19,300 INFO L93 Difference]: Finished difference Result 668 states and 706 transitions. [2018-03-28 13:10:19,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-03-28 13:10:19,300 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 169 [2018-03-28 13:10:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:19,301 INFO L225 Difference]: With dead ends: 668 [2018-03-28 13:10:19,302 INFO L226 Difference]: Without dead ends: 338 [2018-03-28 13:10:19,304 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6512 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6516, Invalid=14364, Unknown=0, NotChecked=0, Total=20880 [2018-03-28 13:10:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-03-28 13:10:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2018-03-28 13:10:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-03-28 13:10:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 341 transitions. [2018-03-28 13:10:19,315 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 341 transitions. Word has length 169 [2018-03-28 13:10:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:19,315 INFO L459 AbstractCegarLoop]: Abstraction has 338 states and 341 transitions. [2018-03-28 13:10:19,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-03-28 13:10:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 341 transitions. [2018-03-28 13:10:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-03-28 13:10:19,318 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:19,318 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] [2018-03-28 13:10:19,318 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 13:10:19,318 INFO L82 PathProgramCache]: Analyzing trace with hash 445310407, 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 13:10:19,326 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:10:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:10:19,391 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:10:20,643 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 13:10:20,643 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:10:24,093 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 13:10:24,114 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:10:24,115 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 127 [2018-03-28 13:10:24,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-03-28 13:10:24,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-03-28 13:10:24,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=14979, Unknown=0, NotChecked=0, Total=16256 [2018-03-28 13:10:24,117 INFO L87 Difference]: Start difference. First operand 338 states and 341 transitions. Second operand 128 states. [2018-03-28 13:10:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:29,707 INFO L93 Difference]: Finished difference Result 356 states and 360 transitions. [2018-03-28 13:10:29,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-03-28 13:10:29,707 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 302 [2018-03-28 13:10:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:29,709 INFO L225 Difference]: With dead ends: 356 [2018-03-28 13:10:29,709 INFO L226 Difference]: Without dead ends: 355 [2018-03-28 13:10:29,710 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=3540, Invalid=32370, Unknown=0, NotChecked=0, Total=35910 [2018-03-28 13:10:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-03-28 13:10:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 346. [2018-03-28 13:10:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2018-03-28 13:10:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 350 transitions. [2018-03-28 13:10:29,723 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 350 transitions. Word has length 302 [2018-03-28 13:10:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:29,724 INFO L459 AbstractCegarLoop]: Abstraction has 346 states and 350 transitions. [2018-03-28 13:10:29,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-03-28 13:10:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 350 transitions. [2018-03-28 13:10:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-03-28 13:10:29,726 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:29,726 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] [2018-03-28 13:10:29,727 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 13:10:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash 919720781, 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 13:10:29,735 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:10:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:10:29,805 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:10:29,820 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 13:10:29,820 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-03-28 13:10:29,839 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-03-28 13:10:29,840 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-03-28 13:10:31,967 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 13:10:31,967 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:10:35,175 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 13:10:35,196 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:10:35,197 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-03-28 13:10:35,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-03-28 13:10:35,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-03-28 13:10:35,198 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1418, Invalid=16404, Unknown=0, NotChecked=0, Total=17822 [2018-03-28 13:10:35,198 INFO L87 Difference]: Start difference. First operand 346 states and 350 transitions. Second operand 134 states. [2018-03-28 13:10:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:44,825 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-03-28 13:10:44,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-03-28 13:10:44,825 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 303 [2018-03-28 13:10:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:44,828 INFO L225 Difference]: With dead ends: 355 [2018-03-28 13:10:44,828 INFO L226 Difference]: Without dead ends: 354 [2018-03-28 13:10:44,830 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10768 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=4945, Invalid=47725, Unknown=0, NotChecked=0, Total=52670 [2018-03-28 13:10:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2018-03-28 13:10:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 347. [2018-03-28 13:10:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-03-28 13:10:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 351 transitions. [2018-03-28 13:10:44,843 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 351 transitions. Word has length 303 [2018-03-28 13:10:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:44,843 INFO L459 AbstractCegarLoop]: Abstraction has 347 states and 351 transitions. [2018-03-28 13:10:44,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-03-28 13:10:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 351 transitions. [2018-03-28 13:10:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-03-28 13:10:44,844 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:44,844 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] [2018-03-28 13:10:44,844 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 13:10:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2021096898, 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 13:10:44,850 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:10:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:10:44,992 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:10:46,384 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 13:10:46,384 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:10:48,647 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 13:10:48,668 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:10:48,669 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [69, 69] imperfect sequences [] total 134 [2018-03-28 13:10:48,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-03-28 13:10:48,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-03-28 13:10:48,670 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3467, Invalid=14355, Unknown=0, NotChecked=0, Total=17822 [2018-03-28 13:10:48,670 INFO L87 Difference]: Start difference. First operand 347 states and 351 transitions. Second operand 134 states. [2018-03-28 13:10:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:52,819 INFO L93 Difference]: Finished difference Result 679 states and 688 transitions. [2018-03-28 13:10:52,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-03-28 13:10:52,819 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 311 [2018-03-28 13:10:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:52,821 INFO L225 Difference]: With dead ends: 679 [2018-03-28 13:10:52,821 INFO L226 Difference]: Without dead ends: 346 [2018-03-28 13:10:52,824 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 487 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12977 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=13102, Invalid=40954, Unknown=0, NotChecked=0, Total=54056 [2018-03-28 13:10:52,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-03-28 13:10:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2018-03-28 13:10:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-03-28 13:10:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 346 transitions. [2018-03-28 13:10:52,839 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 346 transitions. Word has length 311 [2018-03-28 13:10:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:52,840 INFO L459 AbstractCegarLoop]: Abstraction has 343 states and 346 transitions. [2018-03-28 13:10:52,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-03-28 13:10:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 346 transitions. [2018-03-28 13:10:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-03-28 13:10:52,842 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:52,842 INFO L355 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 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 13:10:52,843 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 13:10:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1528477874, 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 13:10:52,852 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:10:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:10:52,920 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:10:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4250 backedges. 3 proven. 4247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:10:54,237 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:10:54,452 WARN L148 SmtUtils]: Spent 210ms on a formula simplification that was a NOOP. DAG size: 165 [2018-03-28 13:10:54,656 WARN L148 SmtUtils]: Spent 200ms on a formula simplification that was a NOOP. DAG size: 165 [2018-03-28 13:10:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4250 backedges. 3 proven. 4247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-03-28 13:10:55,808 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:10:55,808 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 131 [2018-03-28 13:10:55,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-03-28 13:10:55,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-03-28 13:10:55,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3396, Invalid=13634, Unknown=0, NotChecked=0, Total=17030 [2018-03-28 13:10:55,810 INFO L87 Difference]: Start difference. First operand 343 states and 346 transitions. Second operand 131 states. [2018-03-28 13:10:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:57,727 INFO L93 Difference]: Finished difference Result 675 states and 681 transitions. [2018-03-28 13:10:57,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-03-28 13:10:57,727 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 313 [2018-03-28 13:10:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:57,730 INFO L225 Difference]: With dead ends: 675 [2018-03-28 13:10:57,730 INFO L226 Difference]: Without dead ends: 343 [2018-03-28 13:10:57,732 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 494 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14761 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9634, Invalid=27808, Unknown=0, NotChecked=0, Total=37442 [2018-03-28 13:10:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-03-28 13:10:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-03-28 13:10:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-03-28 13:10:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2018-03-28 13:10:57,746 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 313 [2018-03-28 13:10:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:57,746 INFO L459 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2018-03-28 13:10:57,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-03-28 13:10:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2018-03-28 13:10:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-03-28 13:10:57,749 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:57,749 INFO L355 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 32, 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 13:10:57,749 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 13:10:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -64877961, 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 13:10:57,756 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:10:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:10:57,815 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:10:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4531 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4528 trivial. 0 not checked. [2018-03-28 13:10:57,875 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:10:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4531 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4528 trivial. 0 not checked. [2018-03-28 13:10:57,955 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-03-28 13:10:57,955 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-03-28 13:10:57,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-03-28 13:10:57,956 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-03-28 13:10:57,956 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-03-28 13:10:57,956 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand 9 states. [2018-03-28 13:10:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:57,998 INFO L93 Difference]: Finished difference Result 359 states and 361 transitions. [2018-03-28 13:10:57,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-03-28 13:10:57,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 322 [2018-03-28 13:10:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:58,004 INFO L225 Difference]: With dead ends: 359 [2018-03-28 13:10:58,004 INFO L226 Difference]: Without dead ends: 358 [2018-03-28 13:10:58,004 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 635 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 13:10:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-03-28 13:10:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 341. [2018-03-28 13:10:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-03-28 13:10:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 343 transitions. [2018-03-28 13:10:58,015 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 343 transitions. Word has length 322 [2018-03-28 13:10:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:58,015 INFO L459 AbstractCegarLoop]: Abstraction has 341 states and 343 transitions. [2018-03-28 13:10:58,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-03-28 13:10:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 343 transitions. [2018-03-28 13:10:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-03-28 13:10:58,018 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:58,018 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] [2018-03-28 13:10:58,018 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 13:10:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2071552900, 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 13:10:58,027 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:10:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:10:58,093 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:10:58,143 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 13:10:58,143 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:10:58,232 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 13:10:58,266 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:10:58,266 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-03-28 13:10:58,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-03-28 13:10:58,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-03-28 13:10:58,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-03-28 13:10:58,267 INFO L87 Difference]: Start difference. First operand 341 states and 343 transitions. Second operand 8 states. [2018-03-28 13:10:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:58,381 INFO L93 Difference]: Finished difference Result 391 states and 397 transitions. [2018-03-28 13:10:58,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-03-28 13:10:58,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 330 [2018-03-28 13:10:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:58,384 INFO L225 Difference]: With dead ends: 391 [2018-03-28 13:10:58,384 INFO L226 Difference]: Without dead ends: 371 [2018-03-28 13:10:58,384 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 653 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 13:10:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-03-28 13:10:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 361. [2018-03-28 13:10:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2018-03-28 13:10:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 365 transitions. [2018-03-28 13:10:58,400 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 365 transitions. Word has length 330 [2018-03-28 13:10:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:58,401 INFO L459 AbstractCegarLoop]: Abstraction has 361 states and 365 transitions. [2018-03-28 13:10:58,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-03-28 13:10:58,401 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 365 transitions. [2018-03-28 13:10:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2018-03-28 13:10:58,411 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:58,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:10:58,412 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 13:10:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash -991334700, 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 13:10:58,421 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:10:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:10:58,639 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:10:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 41682 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 41646 trivial. 0 not checked. [2018-03-28 13:10:58,996 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:10:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 41682 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 41646 trivial. 0 not checked. [2018-03-28 13:10:59,409 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:10:59,409 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-03-28 13:10:59,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-03-28 13:10:59,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-03-28 13:10:59,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-03-28 13:10:59,410 INFO L87 Difference]: Start difference. First operand 361 states and 365 transitions. Second operand 16 states. [2018-03-28 13:10:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:10:59,596 INFO L93 Difference]: Finished difference Result 431 states and 443 transitions. [2018-03-28 13:10:59,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-03-28 13:10:59,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 946 [2018-03-28 13:10:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:10:59,601 INFO L225 Difference]: With dead ends: 431 [2018-03-28 13:10:59,601 INFO L226 Difference]: Without dead ends: 411 [2018-03-28 13:10:59,602 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 1903 GetRequests, 1877 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 13:10:59,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-03-28 13:10:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 401. [2018-03-28 13:10:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2018-03-28 13:10:59,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 409 transitions. [2018-03-28 13:10:59,625 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 409 transitions. Word has length 946 [2018-03-28 13:10:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:10:59,627 INFO L459 AbstractCegarLoop]: Abstraction has 401 states and 409 transitions. [2018-03-28 13:10:59,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-03-28 13:10:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 409 transitions. [2018-03-28 13:10:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2179 [2018-03-28 13:10:59,676 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:10:59,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:10:59,677 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 13:10:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash -370726012, 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 13:10:59,686 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:11:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:11:00,138 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:11:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 228354 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 228130 trivial. 0 not checked. [2018-03-28 13:11:01,592 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:11:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 228354 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 228130 trivial. 0 not checked. [2018-03-28 13:11:03,245 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:11:03,246 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-03-28 13:11:03,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-03-28 13:11:03,247 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-03-28 13:11:03,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2018-03-28 13:11:03,248 INFO L87 Difference]: Start difference. First operand 401 states and 409 transitions. Second operand 32 states. [2018-03-28 13:11:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:11:03,927 INFO L93 Difference]: Finished difference Result 511 states and 535 transitions. [2018-03-28 13:11:03,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-03-28 13:11:03,928 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 2178 [2018-03-28 13:11:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:11:03,933 INFO L225 Difference]: With dead ends: 511 [2018-03-28 13:11:03,934 INFO L226 Difference]: Without dead ends: 491 [2018-03-28 13:11:03,935 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4383 GetRequests, 4325 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1155, Invalid=2385, Unknown=0, NotChecked=0, Total=3540 [2018-03-28 13:11:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2018-03-28 13:11:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 481. [2018-03-28 13:11:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2018-03-28 13:11:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 497 transitions. [2018-03-28 13:11:03,961 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 497 transitions. Word has length 2178 [2018-03-28 13:11:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:11:03,962 INFO L459 AbstractCegarLoop]: Abstraction has 481 states and 497 transitions. [2018-03-28 13:11:03,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-03-28 13:11:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 497 transitions. [2018-03-28 13:11:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4643 [2018-03-28 13:11:04,099 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:11:04,101 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:11:04,101 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 13:11:04,102 INFO L82 PathProgramCache]: Analyzing trace with hash 325256420, 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 13:11:04,109 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:11:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:11:05,102 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:11:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1051170 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1050090 trivial. 0 not checked. [2018-03-28 13:11:11,239 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-03-28 13:11:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1051170 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1050090 trivial. 0 not checked. [2018-03-28 13:11:17,098 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-03-28 13:11:17,099 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2018-03-28 13:11:17,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-03-28 13:11:17,102 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-03-28 13:11:17,102 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2018-03-28 13:11:17,102 INFO L87 Difference]: Start difference. First operand 481 states and 497 transitions. Second operand 64 states. [2018-03-28 13:11:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-03-28 13:11:18,329 INFO L93 Difference]: Finished difference Result 671 states and 719 transitions. [2018-03-28 13:11:18,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-03-28 13:11:18,329 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 4642 [2018-03-28 13:11:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-03-28 13:11:18,337 INFO L225 Difference]: With dead ends: 671 [2018-03-28 13:11:18,337 INFO L226 Difference]: Without dead ends: 651 [2018-03-28 13:11:18,340 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 9343 GetRequests, 9221 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4867, Invalid=10385, Unknown=0, NotChecked=0, Total=15252 [2018-03-28 13:11:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-03-28 13:11:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 641. [2018-03-28 13:11:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2018-03-28 13:11:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 673 transitions. [2018-03-28 13:11:18,378 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 673 transitions. Word has length 4642 [2018-03-28 13:11:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-03-28 13:11:18,381 INFO L459 AbstractCegarLoop]: Abstraction has 641 states and 673 transitions. [2018-03-28 13:11:18,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-03-28 13:11:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 673 transitions. [2018-03-28 13:11:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9571 [2018-03-28 13:11:18,786 INFO L347 BasicCegarLoop]: Found error trace [2018-03-28 13:11:18,789 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-03-28 13:11:18,789 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 13:11:18,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1722009692, 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 13:11:18,796 INFO L68 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-03-28 13:11:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-03-28 13:11:20,442 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-03-28 13:11:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4494690 backedges. 0 proven. 4712 refuted. 0 times theorem prover too weak. 4489978 trivial. 0 not checked. [2018-03-28 13:11:43,778 INFO L314 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown