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/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cmemchr-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c17473d-m [2018-02-04 12:05:33,960 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 12:05:33,962 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 12:05:33,973 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 12:05:33,974 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 12:05:33,974 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 12:05:33,975 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 12:05:33,976 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 12:05:33,978 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 12:05:33,978 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 12:05:33,979 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 12:05:33,979 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 12:05:33,980 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 12:05:33,981 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 12:05:33,981 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 12:05:33,983 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 12:05:33,985 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 12:05:33,986 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 12:05:33,987 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 12:05:33,988 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 12:05:33,990 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 12:05:33,993 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 12:05:33,993 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 12:05:33,994 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-04 12:05:34,002 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 12:05:34,002 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 12:05:34,003 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 12:05:34,003 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 12:05:34,003 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 12:05:34,003 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 12:05:34,003 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 12:05:34,003 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 12:05:34,003 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 12:05:34,003 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 12:05:34,004 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 12:05:34,004 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 12:05:34,004 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 12:05:34,004 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 12:05:34,004 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 12:05:34,004 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 12:05:34,004 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 12:05:34,004 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 12:05:34,004 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 12:05:34,004 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 12:05:34,005 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 12:05:34,005 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-04 12:05:34,005 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-04 12:05:34,005 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-04 12:05:34,029 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 12:05:34,037 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 12:05:34,039 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 12:05:34,040 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 12:05:34,040 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 12:05:34,041 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cmemchr-alloca_true-valid-memsafety_true-termination.i [2018-02-04 12:05:34,173 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 12:05:34,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 12:05:34,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 12:05:34,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 12:05:34,179 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 12:05:34,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 12:05:34" (1/1) ... [2018-02-04 12:05:34,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f3da0a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34, skipping insertion in model container [2018-02-04 12:05:34,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 12:05:34" (1/1) ... [2018-02-04 12:05:34,193 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 12:05:34,220 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 12:05:34,305 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 12:05:34,316 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 12:05:34,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34 WrapperNode [2018-02-04 12:05:34,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 12:05:34,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 12:05:34,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 12:05:34,322 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 12:05:34,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34" (1/1) ... [2018-02-04 12:05:34,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34" (1/1) ... [2018-02-04 12:05:34,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34" (1/1) ... [2018-02-04 12:05:34,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34" (1/1) ... [2018-02-04 12:05:34,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34" (1/1) ... [2018-02-04 12:05:34,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34" (1/1) ... [2018-02-04 12:05:34,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34" (1/1) ... [2018-02-04 12:05:34,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 12:05:34,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 12:05:34,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 12:05:34,346 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 12:05:34,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34" (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 [2018-02-04 12:05:34,380 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 12:05:34,380 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 12:05:34,380 INFO L136 BoogieDeclarations]: Found implementation of procedure cmemchr [2018-02-04 12:05:34,380 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 12:05:34,380 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 12:05:34,380 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 12:05:34,380 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 12:05:34,381 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 12:05:34,381 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 12:05:34,381 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 12:05:34,381 INFO L128 BoogieDeclarations]: Found specification of procedure cmemchr [2018-02-04 12:05:34,381 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 12:05:34,381 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 12:05:34,381 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 12:05:34,487 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 12:05:34,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 12:05:34 BoogieIcfgContainer [2018-02-04 12:05:34,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 12:05:34,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 12:05:34,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 12:05:34,490 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 12:05:34,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 12:05:34" (1/3) ... [2018-02-04 12:05:34,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a60261b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 12:05:34, skipping insertion in model container [2018-02-04 12:05:34,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 12:05:34" (2/3) ... [2018-02-04 12:05:34,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a60261b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 12:05:34, skipping insertion in model container [2018-02-04 12:05:34,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 12:05:34" (3/3) ... [2018-02-04 12:05:34,492 INFO L107 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca_true-valid-memsafety_true-termination.i [2018-02-04 12:05:34,496 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-04 12:05:34,500 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-02-04 12:05:34,531 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 12:05:34,532 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 12:05:34,532 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-04 12:05:34,532 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-04 12:05:34,532 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 12:05:34,532 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 12:05:34,532 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 12:05:34,532 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 12:05:34,532 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 12:05:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-02-04 12:05:34,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-04 12:05:34,545 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:05:34,546 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:05:34,547 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 12:05:34,550 INFO L82 PathProgramCache]: Analyzing trace with hash -624451344, now seen corresponding path program 1 times [2018-02-04 12:05:34,552 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:05:34,552 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:05:34,580 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:34,581 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:05:34,581 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:05:34,622 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:05:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:05:34,726 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:05:34,726 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-04 12:05:34,727 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-04 12:05:34,735 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-04 12:05:34,735 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-02-04 12:05:34,736 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 8 states. [2018-02-04 12:05:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:05:34,919 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-02-04 12:05:34,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-04 12:05:34,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-02-04 12:05:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:05:34,930 INFO L225 Difference]: With dead ends: 33 [2018-02-04 12:05:34,930 INFO L226 Difference]: Without dead ends: 30 [2018-02-04 12:05:34,931 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-02-04 12:05:34,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-04 12:05:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2018-02-04 12:05:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-02-04 12:05:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-02-04 12:05:34,953 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2018-02-04 12:05:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:05:34,953 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-02-04 12:05:34,953 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-04 12:05:34,953 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-02-04 12:05:34,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-04 12:05:34,954 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:05:34,954 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:05:34,954 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 12:05:34,954 INFO L82 PathProgramCache]: Analyzing trace with hash -624451343, now seen corresponding path program 1 times [2018-02-04 12:05:34,954 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:05:34,954 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:05:34,955 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:34,955 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:05:34,955 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:05:34,970 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:05:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:05:35,054 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:05:35,054 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-02-04 12:05:35,055 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-04 12:05:35,056 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-04 12:05:35,056 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-02-04 12:05:35,056 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 9 states. [2018-02-04 12:05:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:05:35,159 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-02-04 12:05:35,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-04 12:05:35,160 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-02-04 12:05:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:05:35,161 INFO L225 Difference]: With dead ends: 30 [2018-02-04 12:05:35,161 INFO L226 Difference]: Without dead ends: 30 [2018-02-04 12:05:35,162 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-02-04 12:05:35,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-04 12:05:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-02-04 12:05:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-02-04 12:05:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-02-04 12:05:35,165 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 15 [2018-02-04 12:05:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:05:35,165 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-02-04 12:05:35,165 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-04 12:05:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-02-04 12:05:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-04 12:05:35,166 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:05:35,166 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:05:35,166 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 12:05:35,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1772059431, now seen corresponding path program 1 times [2018-02-04 12:05:35,167 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:05:35,167 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:05:35,167 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:35,167 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:05:35,168 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:05:35,184 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:05:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:05:35,275 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:05:35,275 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-04 12:05:35,275 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-02-04 12:05:35,275 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-02-04 12:05:35,276 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-02-04 12:05:35,276 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2018-02-04 12:05:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:05:35,341 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-02-04 12:05:35,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-04 12:05:35,341 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-02-04 12:05:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:05:35,341 INFO L225 Difference]: With dead ends: 49 [2018-02-04 12:05:35,342 INFO L226 Difference]: Without dead ends: 49 [2018-02-04 12:05:35,342 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-02-04 12:05:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-04 12:05:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-02-04 12:05:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-04 12:05:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-02-04 12:05:35,346 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 20 [2018-02-04 12:05:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:05:35,346 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-02-04 12:05:35,346 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-02-04 12:05:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-02-04 12:05:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-04 12:05:35,347 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:05:35,348 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:05:35,348 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 12:05:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1185253417, now seen corresponding path program 1 times [2018-02-04 12:05:35,348 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:05:35,348 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:05:35,349 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:35,349 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:05:35,349 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:05:35,363 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:05:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:05:35,523 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 12:05:35,524 INFO L213 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 [2018-02-04 12:05:35,529 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:05:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:05:35,547 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 12:05:35,573 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 [2018-02-04 12:05:35,575 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-04 12:05:35,577 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-04 12:05:35,577 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-02-04 12:05:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:05:35,776 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 12:05:35,776 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-02-04 12:05:35,777 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-02-04 12:05:35,777 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-02-04 12:05:35,777 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2018-02-04 12:05:35,777 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 23 states. [2018-02-04 12:05:36,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:05:36,088 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2018-02-04 12:05:36,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-04 12:05:36,089 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2018-02-04 12:05:36,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:05:36,090 INFO L225 Difference]: With dead ends: 55 [2018-02-04 12:05:36,090 INFO L226 Difference]: Without dead ends: 55 [2018-02-04 12:05:36,090 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2018-02-04 12:05:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-02-04 12:05:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2018-02-04 12:05:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-02-04 12:05:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2018-02-04 12:05:36,095 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 20 [2018-02-04 12:05:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:05:36,095 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2018-02-04 12:05:36,095 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-02-04 12:05:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2018-02-04 12:05:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-04 12:05:36,096 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:05:36,096 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] [2018-02-04 12:05:36,096 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 12:05:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash 423617884, now seen corresponding path program 1 times [2018-02-04 12:05:36,097 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:05:36,097 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:05:36,098 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:36,098 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:05:36,098 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:05:36,107 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:05:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:05:36,143 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 12:05:36,144 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 12:05:36,144 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 12:05:36,144 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 12:05:36,144 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-04 12:05:36,144 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 4 states. [2018-02-04 12:05:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:05:36,172 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2018-02-04 12:05:36,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 12:05:36,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-02-04 12:05:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:05:36,173 INFO L225 Difference]: With dead ends: 46 [2018-02-04 12:05:36,173 INFO L226 Difference]: Without dead ends: 26 [2018-02-04 12:05:36,173 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 [2018-02-04 12:05:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-02-04 12:05:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-02-04 12:05:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-02-04 12:05:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-02-04 12:05:36,175 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2018-02-04 12:05:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:05:36,176 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-02-04 12:05:36,176 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 12:05:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-02-04 12:05:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-02-04 12:05:36,176 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 12:05:36,176 INFO L351 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 12:05:36,177 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 12:05:36,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1860785903, now seen corresponding path program 2 times [2018-02-04 12:05:36,177 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 12:05:36,177 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 12:05:36,177 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:36,177 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 12:05:36,177 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 12:05:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 12:05:36,190 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 12:05:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:05:36,368 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 12:05:36,368 INFO L213 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 [2018-02-04 12:05:36,373 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 12:05:36,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 12:05:36,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 12:05:36,389 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 12:05:36,392 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 [2018-02-04 12:05:36,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-04 12:05:36,395 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-04 12:05:36,395 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2018-02-04 12:05:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 12:05:36,605 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 12:05:36,606 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-02-04 12:05:36,606 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-02-04 12:05:36,606 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-02-04 12:05:36,606 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2018-02-04 12:05:36,606 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 23 states. [2018-02-04 12:05:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 12:05:37,061 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-02-04 12:05:37,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-02-04 12:05:37,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2018-02-04 12:05:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 12:05:37,061 INFO L225 Difference]: With dead ends: 31 [2018-02-04 12:05:37,061 INFO L226 Difference]: Without dead ends: 0 [2018-02-04 12:05:37,062 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2018-02-04 12:05:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-04 12:05:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-04 12:05:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-04 12:05:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-04 12:05:37,062 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-02-04 12:05:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 12:05:37,063 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-04 12:05:37,063 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-02-04 12:05:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-04 12:05:37,063 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-04 12:05:37,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 12:05:37 BoogieIcfgContainer [2018-02-04 12:05:37,067 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 12:05:37,068 INFO L168 Benchmark]: Toolchain (without parser) took 2894.07 ms. Allocated memory was 405.3 MB in the beginning and 666.4 MB in the end (delta: 261.1 MB). Free memory was 363.5 MB in the beginning and 499.3 MB in the end (delta: -135.8 MB). Peak memory consumption was 125.3 MB. Max. memory is 5.3 GB. [2018-02-04 12:05:37,069 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 405.3 MB. Free memory is still 368.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 12:05:37,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.29 ms. Allocated memory is still 405.3 MB. Free memory was 362.1 MB in the beginning and 352.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-04 12:05:37,069 INFO L168 Benchmark]: Boogie Preprocessor took 24.11 ms. Allocated memory is still 405.3 MB. Free memory was 352.9 MB in the beginning and 350.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-04 12:05:37,069 INFO L168 Benchmark]: RCFGBuilder took 141.95 ms. Allocated memory is still 405.3 MB. Free memory was 350.2 MB in the beginning and 334.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 5.3 GB. [2018-02-04 12:05:37,070 INFO L168 Benchmark]: TraceAbstraction took 2579.02 ms. Allocated memory was 405.3 MB in the beginning and 666.4 MB in the end (delta: 261.1 MB). Free memory was 334.9 MB in the beginning and 499.3 MB in the end (delta: -164.4 MB). Peak memory consumption was 96.7 MB. Max. memory is 5.3 GB. [2018-02-04 12:05:37,070 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 405.3 MB. Free memory is still 368.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 146.29 ms. Allocated memory is still 405.3 MB. Free memory was 362.1 MB in the beginning and 352.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 24.11 ms. Allocated memory is still 405.3 MB. Free memory was 352.9 MB in the beginning and 350.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 141.95 ms. Allocated memory is still 405.3 MB. Free memory was 350.2 MB in the beginning and 334.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2579.02 ms. Allocated memory was 405.3 MB in the beginning and 666.4 MB in the end (delta: 261.1 MB). Free memory was 334.9 MB in the beginning and 499.3 MB in the end (delta: -164.4 MB). Peak memory consumption was 96.7 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: 552]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 3 error locations. SAFE Result, 2.5s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 140 SDtfs, 213 SDslu, 726 SDs, 0 SdLazy, 649 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 132 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=4, 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, 6 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 152 ConstructedInterpolants, 2 QuantifiedInterpolants, 25622 SizeOfPredicates, 20 NumberOfNonLiveVariables, 228 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 2/24 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/openbsd_cmemchr-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-04_12-05-37-076.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cmemchr-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-04_12-05-37-076.csv Received shutdown request...