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/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-memsafety/cstrlen-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-26d9e06-m [2018-02-02 08:41:59,602 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 08:41:59,603 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 08:41:59,613 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 08:41:59,613 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 08:41:59,614 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 08:41:59,615 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 08:41:59,617 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 08:41:59,618 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 08:41:59,619 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 08:41:59,620 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 08:41:59,620 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 08:41:59,621 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 08:41:59,622 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 08:41:59,623 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 08:41:59,624 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 08:41:59,626 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 08:41:59,628 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 08:41:59,629 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 08:41:59,630 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 08:41:59,631 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-02 08:41:59,632 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-02 08:41:59,632 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-02 08:41:59,633 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-02 08:41:59,634 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-02 08:41:59,635 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-02 08:41:59,635 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-02 08:41:59,636 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-02 08:41:59,636 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-02 08:41:59,636 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 08:41:59,637 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 08:41:59,637 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-02 08:41:59,647 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 08:41:59,648 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 08:41:59,649 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 08:41:59,649 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 08:41:59,649 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 08:41:59,649 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 08:41:59,650 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 08:41:59,650 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 08:41:59,650 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 08:41:59,650 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 08:41:59,650 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 08:41:59,650 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 08:41:59,651 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 08:41:59,651 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 08:41:59,651 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 08:41:59,651 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 08:41:59,651 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 08:41:59,651 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 08:41:59,652 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 08:41:59,652 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 08:41:59,652 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 08:41:59,652 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 08:41:59,652 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 08:41:59,652 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 08:41:59,652 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 08:41:59,682 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 08:41:59,691 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 08:41:59,694 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 08:41:59,696 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 08:41:59,696 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 08:41:59,696 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-02-02 08:41:59,881 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 08:41:59,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 08:41:59,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 08:41:59,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 08:41:59,886 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 08:41:59,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:41:59" (1/1) ... [2018-02-02 08:41:59,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a80ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:41:59, skipping insertion in model container [2018-02-02 08:41:59,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:41:59" (1/1) ... [2018-02-02 08:41:59,900 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:41:59,925 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:42:00,008 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:42:00,019 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:42:00,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00 WrapperNode [2018-02-02 08:42:00,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 08:42:00,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 08:42:00,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 08:42:00,024 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 08:42:00,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00" (1/1) ... [2018-02-02 08:42:00,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00" (1/1) ... [2018-02-02 08:42:00,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00" (1/1) ... [2018-02-02 08:42:00,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00" (1/1) ... [2018-02-02 08:42:00,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00" (1/1) ... [2018-02-02 08:42:00,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00" (1/1) ... [2018-02-02 08:42:00,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00" (1/1) ... [2018-02-02 08:42:00,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 08:42:00,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 08:42:00,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 08:42:00,048 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 08:42:00,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00" (1/1) ... No working directory specified, using /home/ultimate/work/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 [2018-02-02 08:42:00,083 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 08:42:00,083 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 08:42:00,083 INFO L136 BoogieDeclarations]: Found implementation of procedure cstrlen [2018-02-02 08:42:00,083 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 08:42:00,083 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 08:42:00,083 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 08:42:00,083 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 08:42:00,083 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 08:42:00,083 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 08:42:00,083 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 08:42:00,084 INFO L128 BoogieDeclarations]: Found specification of procedure cstrlen [2018-02-02 08:42:00,084 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 08:42:00,084 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 08:42:00,084 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 08:42:00,212 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 08:42:00,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:42:00 BoogieIcfgContainer [2018-02-02 08:42:00,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 08:42:00,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 08:42:00,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 08:42:00,215 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 08:42:00,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 08:41:59" (1/3) ... [2018-02-02 08:42:00,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edabab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:42:00, skipping insertion in model container [2018-02-02 08:42:00,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:42:00" (2/3) ... [2018-02-02 08:42:00,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@edabab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:42:00, skipping insertion in model container [2018-02-02 08:42:00,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:42:00" (3/3) ... [2018-02-02 08:42:00,218 INFO L107 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca_true-valid-memsafety_true-termination.i [2018-02-02 08:42:00,224 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 08:42:00,230 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-02-02 08:42:00,259 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 08:42:00,259 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 08:42:00,260 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 08:42:00,260 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 08:42:00,260 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 08:42:00,260 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 08:42:00,260 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 08:42:00,260 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 08:42:00,261 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 08:42:00,270 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2018-02-02 08:42:00,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 08:42:00,277 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:42:00,277 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:42:00,277 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 08:42:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1072861299, now seen corresponding path program 1 times [2018-02-02 08:42:00,282 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:42:00,283 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:42:00,318 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,318 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:42:00,318 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:42:00,358 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:42:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:00,411 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:42:00,412 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 08:42:00,413 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:42:00,421 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:42:00,422 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:42:00,424 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2018-02-02 08:42:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:42:00,482 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-02-02 08:42:00,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 08:42:00,483 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-02-02 08:42:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:42:00,488 INFO L225 Difference]: With dead ends: 29 [2018-02-02 08:42:00,489 INFO L226 Difference]: Without dead ends: 26 [2018-02-02 08:42:00,546 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:42:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-02-02 08:42:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-02-02 08:42:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-02-02 08:42:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-02-02 08:42:00,568 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 10 [2018-02-02 08:42:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:42:00,569 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-02-02 08:42:00,569 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:42:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-02-02 08:42:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 08:42:00,569 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:42:00,569 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:42:00,569 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 08:42:00,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1072861300, now seen corresponding path program 1 times [2018-02-02 08:42:00,570 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:42:00,570 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:42:00,571 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,571 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:42:00,571 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:42:00,585 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:42:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:00,657 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:42:00,657 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 08:42:00,658 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 08:42:00,658 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 08:42:00,658 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:42:00,659 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 5 states. [2018-02-02 08:42:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:42:00,695 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-02-02 08:42:00,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-02 08:42:00,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-02-02 08:42:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:42:00,696 INFO L225 Difference]: With dead ends: 25 [2018-02-02 08:42:00,697 INFO L226 Difference]: Without dead ends: 25 [2018-02-02 08:42:00,697 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-02-02 08:42:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-02-02 08:42:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-02-02 08:42:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-02-02 08:42:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-02-02 08:42:00,701 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2018-02-02 08:42:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:42:00,701 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-02-02 08:42:00,701 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 08:42:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-02-02 08:42:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-02 08:42:00,702 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:42:00,702 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:42:00,702 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 08:42:00,702 INFO L82 PathProgramCache]: Analyzing trace with hash -360318775, now seen corresponding path program 1 times [2018-02-02 08:42:00,702 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:42:00,702 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:42:00,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,703 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:42:00,703 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:42:00,716 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:42:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:00,749 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:42:00,749 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 08:42:00,749 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 08:42:00,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 08:42:00,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:42:00,750 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 5 states. [2018-02-02 08:42:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:42:00,795 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-02-02 08:42:00,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 08:42:00,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-02-02 08:42:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:42:00,796 INFO L225 Difference]: With dead ends: 24 [2018-02-02 08:42:00,796 INFO L226 Difference]: Without dead ends: 24 [2018-02-02 08:42:00,797 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-02-02 08:42:00,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-02-02 08:42:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-02-02 08:42:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-02-02 08:42:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-02-02 08:42:00,800 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2018-02-02 08:42:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:42:00,800 INFO L432 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-02-02 08:42:00,800 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 08:42:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-02-02 08:42:00,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-02 08:42:00,801 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:42:00,801 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:42:00,801 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 08:42:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash -360318774, now seen corresponding path program 1 times [2018-02-02 08:42:00,801 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:42:00,802 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:42:00,802 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,803 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:42:00,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:42:00,813 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:42:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:00,900 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:42:00,900 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-02 08:42:00,900 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 08:42:00,901 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 08:42:00,901 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-02-02 08:42:00,901 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-02-02 08:42:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:42:00,975 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-02-02 08:42:00,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-02 08:42:00,976 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-02-02 08:42:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:42:00,978 INFO L225 Difference]: With dead ends: 30 [2018-02-02 08:42:00,978 INFO L226 Difference]: Without dead ends: 30 [2018-02-02 08:42:00,978 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-02-02 08:42:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-02 08:42:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2018-02-02 08:42:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-02-02 08:42:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-02-02 08:42:00,980 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2018-02-02 08:42:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:42:00,981 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-02-02 08:42:00,981 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 08:42:00,981 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-02-02 08:42:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 08:42:00,981 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:42:00,981 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:42:00,981 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 08:42:00,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1133368501, now seen corresponding path program 1 times [2018-02-02 08:42:00,982 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:42:00,982 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:42:00,982 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,982 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:42:00,983 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:42:00,995 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:42:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:01,105 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:42:01,105 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-02-02 08:42:01,106 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-02 08:42:01,106 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-02 08:42:01,106 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-02-02 08:42:01,106 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2018-02-02 08:42:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:42:01,210 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-02-02 08:42:01,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-02 08:42:01,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2018-02-02 08:42:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:42:01,211 INFO L225 Difference]: With dead ends: 42 [2018-02-02 08:42:01,211 INFO L226 Difference]: Without dead ends: 42 [2018-02-02 08:42:01,212 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-02-02 08:42:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-02-02 08:42:01,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2018-02-02 08:42:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-02-02 08:42:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-02-02 08:42:01,215 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 17 [2018-02-02 08:42:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:42:01,215 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-02-02 08:42:01,215 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-02 08:42:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-02-02 08:42:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 08:42:01,216 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:42:01,216 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:42:01,216 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 08:42:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash -432303923, now seen corresponding path program 1 times [2018-02-02 08:42:01,217 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:42:01,217 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:42:01,217 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:01,218 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:42:01,218 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:42:01,229 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:42:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:01,363 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:42:01,363 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 08:42:01,369 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:42:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:42:01,396 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:42:01,426 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2018-02-02 08:42:01,428 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 11 treesize of output 10 [2018-02-02 08:42:01,428 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 08:42:01,430 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 08:42:01,439 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-02-02 08:42:01,440 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2018-02-02 08:42:01,501 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2018-02-02 08:42:01,508 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2018-02-02 08:42:01,508 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-02-02 08:42:01,514 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-02-02 08:42:01,547 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-02-02 08:42:01,547 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:33 [2018-02-02 08:42:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:01,606 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:42:01,606 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2018-02-02 08:42:01,606 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-02-02 08:42:01,606 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-02-02 08:42:01,607 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-02-02 08:42:01,607 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-02-02 08:42:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:42:02,065 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2018-02-02 08:42:02,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-02-02 08:42:02,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2018-02-02 08:42:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:42:02,066 INFO L225 Difference]: With dead ends: 47 [2018-02-02 08:42:02,066 INFO L226 Difference]: Without dead ends: 47 [2018-02-02 08:42:02,066 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2018-02-02 08:42:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-02-02 08:42:02,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2018-02-02 08:42:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-02-02 08:42:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-02-02 08:42:02,069 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 17 [2018-02-02 08:42:02,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:42:02,069 INFO L432 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-02-02 08:42:02,069 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-02-02 08:42:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-02-02 08:42:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 08:42:02,069 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:42:02,070 INFO L351 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:42:02,070 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 08:42:02,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1840705640, now seen corresponding path program 2 times [2018-02-02 08:42:02,070 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:42:02,070 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:42:02,071 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:02,071 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:42:02,071 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:42:02,081 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:42:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:02,232 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:42:02,232 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 08:42:02,238 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 08:42:02,247 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-02-02 08:42:02,257 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-02-02 08:42:02,258 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 08:42:02,260 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:42:02,264 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 [2018-02-02 08:42:02,265 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 08:42:02,272 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 08:42:02,273 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-02-02 08:42:02,294 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2018-02-02 08:42:02,296 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 13 treesize of output 12 [2018-02-02 08:42:02,296 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-02-02 08:42:02,297 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 08:42:02,300 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-02-02 08:42:02,300 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2018-02-02 08:42:02,366 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-02-02 08:42:02,372 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2018-02-02 08:42:02,372 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-02-02 08:42:02,375 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-02-02 08:42:02,381 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-02-02 08:42:02,381 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:38, output treesize:49 [2018-02-02 08:42:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:02,426 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:42:02,426 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-02-02 08:42:02,426 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-02-02 08:42:02,427 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-02-02 08:42:02,427 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-02-02 08:42:02,427 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 17 states. [2018-02-02 08:42:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:42:02,920 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-02-02 08:42:02,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-02 08:42:02,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-02-02 08:42:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:42:02,921 INFO L225 Difference]: With dead ends: 46 [2018-02-02 08:42:02,921 INFO L226 Difference]: Without dead ends: 46 [2018-02-02 08:42:02,921 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2018-02-02 08:42:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-02-02 08:42:02,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2018-02-02 08:42:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-02-02 08:42:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-02-02 08:42:02,925 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 20 [2018-02-02 08:42:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:42:02,925 INFO L432 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-02-02 08:42:02,925 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-02-02 08:42:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-02-02 08:42:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-02 08:42:02,926 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:42:02,926 INFO L351 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] [2018-02-02 08:42:02,927 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstrlenErr1RequiresViolation, cstrlenErr0RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-02-02 08:42:02,927 INFO L82 PathProgramCache]: Analyzing trace with hash 248709196, now seen corresponding path program 1 times [2018-02-02 08:42:02,927 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:42:02,927 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:42:02,928 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:02,928 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 08:42:02,928 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:42:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:42:02,938 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:42:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:42:02,977 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:42:02,977 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 08:42:02,977 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:42:02,978 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:42:02,978 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:42:02,978 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 4 states. [2018-02-02 08:42:03,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:42:03,013 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-02-02 08:42:03,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 08:42:03,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-02-02 08:42:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:42:03,015 INFO L225 Difference]: With dead ends: 33 [2018-02-02 08:42:03,015 INFO L226 Difference]: Without dead ends: 0 [2018-02-02 08:42:03,016 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:42:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-02 08:42:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-02 08:42:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-02 08:42:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-02 08:42:03,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2018-02-02 08:42:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:42:03,017 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-02 08:42:03,017 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:42:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-02 08:42:03,017 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-02 08:42:03,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 08:42:03 BoogieIcfgContainer [2018-02-02 08:42:03,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 08:42:03,022 INFO L168 Benchmark]: Toolchain (without parser) took 3141.00 ms. Allocated memory was 403.7 MB in the beginning and 656.4 MB in the end (delta: 252.7 MB). Free memory was 361.5 MB in the beginning and 582.6 MB in the end (delta: -221.2 MB). Peak memory consumption was 31.6 MB. Max. memory is 5.3 GB. [2018-02-02 08:42:03,023 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 403.7 MB. Free memory is still 366.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 08:42:03,024 INFO L168 Benchmark]: CACSL2BoogieTranslator took 141.24 ms. Allocated memory is still 403.7 MB. Free memory was 360.2 MB in the beginning and 350.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-02 08:42:03,024 INFO L168 Benchmark]: Boogie Preprocessor took 23.92 ms. Allocated memory is still 403.7 MB. Free memory was 350.9 MB in the beginning and 348.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 08:42:03,024 INFO L168 Benchmark]: RCFGBuilder took 164.44 ms. Allocated memory is still 403.7 MB. Free memory was 348.3 MB in the beginning and 333.5 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 5.3 GB. [2018-02-02 08:42:03,024 INFO L168 Benchmark]: TraceAbstraction took 2808.83 ms. Allocated memory was 403.7 MB in the beginning and 656.4 MB in the end (delta: 252.7 MB). Free memory was 333.5 MB in the beginning and 582.6 MB in the end (delta: -249.2 MB). Peak memory consumption was 3.5 MB. Max. memory is 5.3 GB. [2018-02-02 08:42:03,026 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 403.7 MB. Free memory is still 366.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 141.24 ms. Allocated memory is still 403.7 MB. Free memory was 360.2 MB in the beginning and 350.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 23.92 ms. Allocated memory is still 403.7 MB. Free memory was 350.9 MB in the beginning and 348.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 164.44 ms. Allocated memory is still 403.7 MB. Free memory was 348.3 MB in the beginning and 333.5 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2808.83 ms. Allocated memory was 403.7 MB in the beginning and 656.4 MB in the end (delta: 252.7 MB). Free memory was 333.5 MB in the beginning and 582.6 MB in the end (delta: -249.2 MB). Peak memory consumption was 3.5 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 5 error locations. SAFE Result, 2.7s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 153 SDtfs, 234 SDslu, 549 SDs, 0 SdLazy, 546 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 28 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 151 ConstructedInterpolants, 10 QuantifiedInterpolants, 17814 SizeOfPredicates, 14 NumberOfNonLiveVariables, 164 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 4/20 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_08-42-03-032.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/cstrlen-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-02_08-42-03-032.csv Received shutdown request...