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_SmtInterpol_NoArray.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 17:25:52,977 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 17:25:52,978 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 17:25:52,988 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 17:25:52,989 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 17:25:52,989 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 17:25:52,990 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 17:25:52,992 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 17:25:52,993 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 17:25:52,994 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 17:25:52,994 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 17:25:52,995 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 17:25:52,995 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 17:25:52,996 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 17:25:52,997 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 17:25:52,999 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 17:25:53,000 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 17:25:53,002 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 17:25:53,003 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 17:25:53,004 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 17:25:53,006 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 17:25:53,010 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_NoArray.epf [2018-02-04 17:25:53,019 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 17:25:53,020 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 17:25:53,021 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 17:25:53,021 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 17:25:53,021 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 17:25:53,021 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 17:25:53,021 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 17:25:53,021 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 17:25:53,021 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 17:25:53,022 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 17:25:53,022 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 17:25:53,022 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 17:25:53,022 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 17:25:53,022 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 17:25:53,022 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 17:25:53,023 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 17:25:53,023 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 17:25:53,023 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 17:25:53,023 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 17:25:53,023 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 17:25:53,023 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 17:25:53,024 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-04 17:25:53,024 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-04 17:25:53,024 INFO L133 SettingsManager]: * Trace refinement strategy=SMTINTERPOL [2018-02-04 17:25:53,054 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 17:25:53,065 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 17:25:53,070 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 17:25:53,072 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 17:25:53,072 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 17:25:53,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cmemchr-alloca_true-valid-memsafety_true-termination.i [2018-02-04 17:25:53,216 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 17:25:53,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 17:25:53,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 17:25:53,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 17:25:53,221 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 17:25:53,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 05:25:53" (1/1) ... [2018-02-04 17:25:53,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3670bcd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53, skipping insertion in model container [2018-02-04 17:25:53,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 05:25:53" (1/1) ... [2018-02-04 17:25:53,233 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 17:25:53,260 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 17:25:53,346 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 17:25:53,359 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 17:25:53,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53 WrapperNode [2018-02-04 17:25:53,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 17:25:53,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 17:25:53,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 17:25:53,366 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 17:25:53,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53" (1/1) ... [2018-02-04 17:25:53,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53" (1/1) ... [2018-02-04 17:25:53,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53" (1/1) ... [2018-02-04 17:25:53,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53" (1/1) ... [2018-02-04 17:25:53,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53" (1/1) ... [2018-02-04 17:25:53,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53" (1/1) ... [2018-02-04 17:25:53,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53" (1/1) ... [2018-02-04 17:25:53,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 17:25:53,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 17:25:53,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 17:25:53,392 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 17:25:53,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53" (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 17:25:53,427 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 17:25:53,427 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 17:25:53,427 INFO L136 BoogieDeclarations]: Found implementation of procedure cmemchr [2018-02-04 17:25:53,427 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 17:25:53,427 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-04 17:25:53,427 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-04 17:25:53,427 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-04 17:25:53,427 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-04 17:25:53,427 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-04 17:25:53,428 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 17:25:53,428 INFO L128 BoogieDeclarations]: Found specification of procedure cmemchr [2018-02-04 17:25:53,428 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 17:25:53,428 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 17:25:53,428 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 17:25:53,537 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 17:25:53,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 05:25:53 BoogieIcfgContainer [2018-02-04 17:25:53,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 17:25:53,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 17:25:53,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 17:25:53,541 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 17:25:53,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 05:25:53" (1/3) ... [2018-02-04 17:25:53,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8cd75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 05:25:53, skipping insertion in model container [2018-02-04 17:25:53,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 05:25:53" (2/3) ... [2018-02-04 17:25:53,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8cd75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 05:25:53, skipping insertion in model container [2018-02-04 17:25:53,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 05:25:53" (3/3) ... [2018-02-04 17:25:53,544 INFO L107 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca_true-valid-memsafety_true-termination.i [2018-02-04 17:25:53,551 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-04 17:25:53,557 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-02-04 17:25:53,590 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 17:25:53,590 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 17:25:53,590 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-04 17:25:53,590 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-04 17:25:53,590 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 17:25:53,590 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 17:25:53,591 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 17:25:53,591 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 17:25:53,591 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 17:25:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-02-04 17:25:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-04 17:25:53,613 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:25:53,614 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 17:25:53,614 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 17:25:53,626 INFO L82 PathProgramCache]: Analyzing trace with hash -624451344, now seen corresponding path program 1 times [2018-02-04 17:25:53,628 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:25:53,629 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:25:53,671 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:53,671 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:53,672 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:53,725 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:25:53,831 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 17:25:53,833 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 17:25:53,834 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-04 17:25:53,835 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-04 17:25:53,847 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-04 17:25:53,847 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-02-04 17:25:53,849 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 8 states. [2018-02-04 17:25:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:25:54,023 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-02-04 17:25:54,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-04 17:25:54,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-02-04 17:25:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:25:54,031 INFO L225 Difference]: With dead ends: 33 [2018-02-04 17:25:54,031 INFO L226 Difference]: Without dead ends: 30 [2018-02-04 17:25:54,032 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 17:25:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-04 17:25:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2018-02-04 17:25:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-02-04 17:25:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-02-04 17:25:54,055 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2018-02-04 17:25:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:25:54,055 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-02-04 17:25:54,055 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-04 17:25:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-02-04 17:25:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-04 17:25:54,056 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:25:54,056 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 17:25:54,056 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 17:25:54,056 INFO L82 PathProgramCache]: Analyzing trace with hash -624451343, now seen corresponding path program 1 times [2018-02-04 17:25:54,056 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:25:54,056 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:25:54,057 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:54,057 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:54,057 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:54,074 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:25:54,180 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 17:25:54,180 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 17:25:54,180 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-02-04 17:25:54,182 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-04 17:25:54,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-04 17:25:54,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-02-04 17:25:54,183 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 9 states. [2018-02-04 17:25:54,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:25:54,291 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2018-02-04 17:25:54,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-04 17:25:54,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-02-04 17:25:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:25:54,292 INFO L225 Difference]: With dead ends: 30 [2018-02-04 17:25:54,292 INFO L226 Difference]: Without dead ends: 30 [2018-02-04 17:25:54,293 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 17:25:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-04 17:25:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-02-04 17:25:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-02-04 17:25:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-02-04 17:25:54,297 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 15 [2018-02-04 17:25:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:25:54,297 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-02-04 17:25:54,297 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-04 17:25:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-02-04 17:25:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-04 17:25:54,298 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:25:54,298 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 17:25:54,298 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 17:25:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1772059431, now seen corresponding path program 1 times [2018-02-04 17:25:54,298 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:25:54,299 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:25:54,300 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:54,300 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:54,300 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:54,318 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:25:54,410 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 17:25:54,410 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 17:25:54,410 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-04 17:25:54,410 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-02-04 17:25:54,410 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-02-04 17:25:54,410 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-02-04 17:25:54,411 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2018-02-04 17:25:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:25:54,460 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-02-04 17:25:54,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-04 17:25:54,460 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-02-04 17:25:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:25:54,461 INFO L225 Difference]: With dead ends: 49 [2018-02-04 17:25:54,461 INFO L226 Difference]: Without dead ends: 49 [2018-02-04 17:25:54,462 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 17:25:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-04 17:25:54,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-02-04 17:25:54,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-04 17:25:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-02-04 17:25:54,467 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 20 [2018-02-04 17:25:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:25:54,467 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-02-04 17:25:54,467 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-02-04 17:25:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-02-04 17:25:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-04 17:25:54,468 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:25:54,468 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 17:25:54,468 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 17:25:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1185253417, now seen corresponding path program 1 times [2018-02-04 17:25:54,469 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:25:54,469 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:25:54,470 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:54,470 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:54,470 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:54,485 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:25:54,673 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 17:25:54,673 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 17:25:54,673 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_FP [2018-02-04 17:25:54,674 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:54,719 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 17:25:54,752 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 17:25:54,754 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-04 17:25:54,757 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-04 17:25:54,757 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2018-02-04 17:25:54,948 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 17:25:54,949 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 17:25:54,949 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-02-04 17:25:54,949 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-02-04 17:25:54,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-02-04 17:25:54,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2018-02-04 17:25:54,949 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 23 states. [2018-02-04 17:25:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:25:55,270 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2018-02-04 17:25:55,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-04 17:25:55,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2018-02-04 17:25:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:25:55,271 INFO L225 Difference]: With dead ends: 55 [2018-02-04 17:25:55,271 INFO L226 Difference]: Without dead ends: 55 [2018-02-04 17:25:55,272 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2018-02-04 17:25:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-02-04 17:25:55,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2018-02-04 17:25:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-02-04 17:25:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2018-02-04 17:25:55,276 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 20 [2018-02-04 17:25:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:25:55,277 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2018-02-04 17:25:55,277 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-02-04 17:25:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2018-02-04 17:25:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-04 17:25:55,278 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:25:55,278 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 17:25:55,278 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 17:25:55,278 INFO L82 PathProgramCache]: Analyzing trace with hash 423617884, now seen corresponding path program 1 times [2018-02-04 17:25:55,278 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:25:55,278 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:25:55,279 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:55,279 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:55,279 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:55,289 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:25:55,293 INFO L430 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown lemma type! [2018-02-04 17:25:55,293 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 17:25:55,294 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_FP [2018-02-04 17:25:55,294 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:55,307 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 17:25:55,327 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 17:25:55,327 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 17:25:55,328 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-02-04 17:25:55,328 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-04 17:25:55,328 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-04 17:25:55,328 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-02-04 17:25:55,328 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 6 states. [2018-02-04 17:25:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:25:55,358 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2018-02-04 17:25:55,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-04 17:25:55,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-02-04 17:25:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:25:55,359 INFO L225 Difference]: With dead ends: 54 [2018-02-04 17:25:55,359 INFO L226 Difference]: Without dead ends: 51 [2018-02-04 17:25:55,359 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-02-04 17:25:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-02-04 17:25:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-02-04 17:25:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-02-04 17:25:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2018-02-04 17:25:55,363 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 20 [2018-02-04 17:25:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:25:55,363 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2018-02-04 17:25:55,363 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-04 17:25:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2018-02-04 17:25:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-04 17:25:55,364 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:25:55,364 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] [2018-02-04 17:25:55,364 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 17:25:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1665032961, now seen corresponding path program 1 times [2018-02-04 17:25:55,364 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:25:55,364 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:25:55,365 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:55,365 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:55,365 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:55,374 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:25:55,375 INFO L430 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown lemma type! [2018-02-04 17:25:55,376 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 17:25:55,376 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_FP [2018-02-04 17:25:55,376 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:55,392 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 17:25:55,403 INFO L700 Elim1Store]: detected not equals via solver [2018-02-04 17:25:55,406 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2018-02-04 17:25:55,406 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-04 17:25:55,407 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-02-04 17:25:55,407 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2018-02-04 17:25:55,423 WARN L1033 $PredicateComparison]: unable to prove that (exists ((|main_#t~malloc6.base| Int)) (and (= 0 (select |c_old(#valid)| |main_#t~malloc6.base|)) (= |c_#valid| (store |c_old(#valid)| |main_#t~malloc6.base| 0)))) is different from true [2018-02-04 17:25:55,425 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 17:25:55,425 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 17:25:55,425 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-04 17:25:55,425 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-04 17:25:55,426 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-04 17:25:55,426 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2018-02-04 17:25:55,426 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 6 states. [2018-02-04 17:25:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:25:55,465 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2018-02-04 17:25:55,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-04 17:25:55,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-02-04 17:25:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:25:55,466 INFO L225 Difference]: With dead ends: 46 [2018-02-04 17:25:55,466 INFO L226 Difference]: Without dead ends: 26 [2018-02-04 17:25:55,467 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=28, Unknown=1, NotChecked=10, Total=56 [2018-02-04 17:25:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-02-04 17:25:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-02-04 17:25:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-02-04 17:25:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-02-04 17:25:55,469 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2018-02-04 17:25:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:25:55,469 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-02-04 17:25:55,469 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-04 17:25:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-02-04 17:25:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-02-04 17:25:55,469 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 17:25:55,470 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 17:25:55,470 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cmemchrErr1RequiresViolation, cmemchrErr0RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-04 17:25:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1860785903, now seen corresponding path program 2 times [2018-02-04 17:25:55,470 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-04 17:25:55,470 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-04 17:25:55,471 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:55,471 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 17:25:55,471 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 17:25:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 17:25:55,486 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 17:25:55,660 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 17:25:55,660 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 17:25:55,661 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_FP [2018-02-04 17:25:55,661 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 17:25:55,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 17:25:55,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 17:25:55,689 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 17:25:55,725 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 17:25:55,726 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-04 17:25:55,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-04 17:25:55,729 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2018-02-04 17:25:56,058 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 17:25:56,058 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 17:25:56,058 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2018-02-04 17:25:56,058 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-02-04 17:25:56,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-02-04 17:25:56,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2018-02-04 17:25:56,059 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 29 states. [2018-02-04 17:25:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 17:25:56,877 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-02-04 17:25:56,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-02-04 17:25:56,877 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 25 [2018-02-04 17:25:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 17:25:56,877 INFO L225 Difference]: With dead ends: 31 [2018-02-04 17:25:56,878 INFO L226 Difference]: Without dead ends: 0 [2018-02-04 17:25:56,878 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2018-02-04 17:25:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-04 17:25:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-04 17:25:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-04 17:25:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-04 17:25:56,879 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-02-04 17:25:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 17:25:56,879 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-04 17:25:56,879 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-02-04 17:25:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-04 17:25:56,879 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-04 17:25:56,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 05:25:56 BoogieIcfgContainer [2018-02-04 17:25:56,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 17:25:56,883 INFO L168 Benchmark]: Toolchain (without parser) took 3666.43 ms. Allocated memory was 396.9 MB in the beginning and 671.1 MB in the end (delta: 274.2 MB). Free memory was 355.1 MB in the beginning and 570.9 MB in the end (delta: -215.8 MB). Peak memory consumption was 58.4 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:56,883 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 396.9 MB. Free memory is still 360.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 17:25:56,883 INFO L168 Benchmark]: CACSL2BoogieTranslator took 148.14 ms. Allocated memory is still 396.9 MB. Free memory was 353.8 MB in the beginning and 344.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:56,884 INFO L168 Benchmark]: Boogie Preprocessor took 25.90 ms. Allocated memory is still 396.9 MB. Free memory was 344.5 MB in the beginning and 341.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:56,884 INFO L168 Benchmark]: RCFGBuilder took 145.47 ms. Allocated memory is still 396.9 MB. Free memory was 341.9 MB in the beginning and 326.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:56,884 INFO L168 Benchmark]: TraceAbstraction took 3344.41 ms. Allocated memory was 396.9 MB in the beginning and 671.1 MB in the end (delta: 274.2 MB). Free memory was 326.5 MB in the beginning and 570.9 MB in the end (delta: -244.4 MB). Peak memory consumption was 29.8 MB. Max. memory is 5.3 GB. [2018-02-04 17:25:56,885 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 396.9 MB. Free memory is still 360.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 148.14 ms. Allocated memory is still 396.9 MB. Free memory was 353.8 MB in the beginning and 344.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 25.90 ms. Allocated memory is still 396.9 MB. Free memory was 344.5 MB in the beginning and 341.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 145.47 ms. Allocated memory is still 396.9 MB. Free memory was 341.9 MB in the beginning and 326.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 5.3 GB. * TraceAbstraction took 3344.41 ms. Allocated memory was 396.9 MB in the beginning and 671.1 MB in the end (delta: 274.2 MB). Free memory was 326.5 MB in the beginning and 570.9 MB in the end (delta: -244.4 MB). Peak memory consumption was 29.8 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, 3.2s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 161 SDtfs, 253 SDslu, 909 SDs, 0 SdLazy, 803 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.9s 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, 7 MinimizatonAttempts, 23 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 224 NumberOfCodeBlocks, 224 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 173 ConstructedInterpolants, 9 QuantifiedInterpolants, 29834 SizeOfPredicates, 23 NumberOfNonLiveVariables, 421 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 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_SmtInterpol_NoArray.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-04_17-25-56-889.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_SmtInterpol_NoArray.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-04_17-25-56-889.csv Received shutdown request...