java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-26d9e06-m [2018-02-02 08:43:48,494 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 08:43:48,496 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 08:43:48,509 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 08:43:48,509 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 08:43:48,510 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 08:43:48,511 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 08:43:48,512 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 08:43:48,514 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 08:43:48,514 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 08:43:48,515 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 08:43:48,515 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 08:43:48,516 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 08:43:48,517 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 08:43:48,518 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 08:43:48,519 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 08:43:48,521 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 08:43:48,522 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 08:43:48,523 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 08:43:48,524 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 08:43:48,525 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-02 08:43:48,529 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 08:43:48,529 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 08:43:48,530 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cav18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-02 08:43:48,539 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 08:43:48,539 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 08:43:48,540 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 08:43:48,540 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 08:43:48,540 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 08:43:48,540 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 08:43:48,541 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 08:43:48,541 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 08:43:48,541 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 08:43:48,541 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 08:43:48,541 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 08:43:48,541 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 08:43:48,541 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 08:43:48,542 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 08:43:48,542 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 08:43:48,542 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 08:43:48,542 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 08:43:48,542 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 08:43:48,542 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 08:43:48,542 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 08:43:48,543 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 08:43:48,543 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 08:43:48,543 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 08:43:48,543 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 08:43:48,543 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 08:43:48,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 08:43:48,580 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 08:43:48,587 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 08:43:48,588 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 08:43:48,589 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 08:43:48,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i [2018-02-02 08:43:48,729 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 08:43:48,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 08:43:48,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 08:43:48,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 08:43:48,735 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 08:43:48,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:43:48" (1/1) ... [2018-02-02 08:43:48,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48, skipping insertion in model container [2018-02-02 08:43:48,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:43:48" (1/1) ... [2018-02-02 08:43:48,747 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:43:48,775 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:43:48,862 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:43:48,875 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:43:48,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48 WrapperNode [2018-02-02 08:43:48,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 08:43:48,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 08:43:48,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 08:43:48,881 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 08:43:48,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48" (1/1) ... [2018-02-02 08:43:48,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48" (1/1) ... [2018-02-02 08:43:48,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48" (1/1) ... [2018-02-02 08:43:48,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48" (1/1) ... [2018-02-02 08:43:48,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48" (1/1) ... [2018-02-02 08:43:48,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48" (1/1) ... [2018-02-02 08:43:48,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48" (1/1) ... [2018-02-02 08:43:48,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 08:43:48,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 08:43:48,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 08:43:48,909 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 08:43:48,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48" (1/1) ... No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 08:43:48,943 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 08:43:48,943 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 08:43:48,943 INFO L136 BoogieDeclarations]: Found implementation of procedure cbzero [2018-02-02 08:43:48,943 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 08:43:48,943 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 08:43:48,944 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 08:43:48,944 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 08:43:48,944 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 08:43:48,944 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 08:43:48,944 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 08:43:48,944 INFO L128 BoogieDeclarations]: Found specification of procedure cbzero [2018-02-02 08:43:48,944 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 08:43:48,944 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 08:43:48,944 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 08:43:49,066 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 08:43:49,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:43:49 BoogieIcfgContainer [2018-02-02 08:43:49,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 08:43:49,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 08:43:49,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 08:43:49,070 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 08:43:49,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 08:43:48" (1/3) ... [2018-02-02 08:43:49,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1f038c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:43:49, skipping insertion in model container [2018-02-02 08:43:49,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:43:48" (2/3) ... [2018-02-02 08:43:49,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1f038c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:43:49, skipping insertion in model container [2018-02-02 08:43:49,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:43:49" (3/3) ... [2018-02-02 08:43:49,073 INFO L107 eAbstractionObserver]: Analyzing ICFG openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i [2018-02-02 08:43:49,081 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 08:43:49,087 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-02-02 08:43:49,120 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 08:43:49,120 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 08:43:49,120 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 08:43:49,121 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 08:43:49,121 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 08:43:49,121 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 08:43:49,121 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 08:43:49,121 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 08:43:49,122 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 08:43:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-02-02 08:43:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 08:43:49,141 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:49,142 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:43:49,142 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:49,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1815231445, now seen corresponding path program 1 times [2018-02-02 08:43:49,148 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:49,148 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:49,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,183 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:49,183 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:49,224 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:49,270 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:43:49,270 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 08:43:49,272 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:43:49,280 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:43:49,281 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:43:49,282 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2018-02-02 08:43:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:49,343 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-02-02 08:43:49,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 08:43:49,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-02-02 08:43:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:49,351 INFO L225 Difference]: With dead ends: 33 [2018-02-02 08:43:49,352 INFO L226 Difference]: Without dead ends: 29 [2018-02-02 08:43:49,353 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:43:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-02-02 08:43:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-02-02 08:43:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-02-02 08:43:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2018-02-02 08:43:49,417 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2018-02-02 08:43:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:49,417 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2018-02-02 08:43:49,417 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:43:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2018-02-02 08:43:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-02-02 08:43:49,418 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:49,418 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:43:49,418 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:49,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1815233367, now seen corresponding path program 1 times [2018-02-02 08:43:49,418 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:49,418 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:49,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,419 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:49,419 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:49,429 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:49,444 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:43:49,444 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-02-02 08:43:49,445 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-02-02 08:43:49,445 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-02-02 08:43:49,445 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-02-02 08:43:49,445 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 3 states. [2018-02-02 08:43:49,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:49,471 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-02-02 08:43:49,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-02-02 08:43:49,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-02-02 08:43:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:49,472 INFO L225 Difference]: With dead ends: 28 [2018-02-02 08:43:49,472 INFO L226 Difference]: Without dead ends: 27 [2018-02-02 08:43:49,472 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-02-02 08:43:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-02-02 08:43:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-02-02 08:43:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-02-02 08:43:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-02-02 08:43:49,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2018-02-02 08:43:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:49,474 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-02-02 08:43:49,475 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-02-02 08:43:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-02-02 08:43:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-02-02 08:43:49,475 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:49,475 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:43:49,475 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:49,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1377281886, now seen corresponding path program 1 times [2018-02-02 08:43:49,475 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:49,475 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:49,476 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,476 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:49,476 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:49,494 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:49,561 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:43:49,561 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-02-02 08:43:49,562 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-02-02 08:43:49,562 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-02-02 08:43:49,562 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-02-02 08:43:49,562 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-02-02 08:43:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:49,631 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-02-02 08:43:49,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-02 08:43:49,632 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-02-02 08:43:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:49,632 INFO L225 Difference]: With dead ends: 25 [2018-02-02 08:43:49,633 INFO L226 Difference]: Without dead ends: 25 [2018-02-02 08:43:49,633 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-02-02 08:43:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-02-02 08:43:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-02-02 08:43:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-02-02 08:43:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-02-02 08:43:49,636 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2018-02-02 08:43:49,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:49,636 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-02-02 08:43:49,637 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-02-02 08:43:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-02-02 08:43:49,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-02-02 08:43:49,637 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:49,637 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:43:49,637 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1377281887, now seen corresponding path program 1 times [2018-02-02 08:43:49,638 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:49,638 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:49,639 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,639 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:49,639 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:49,652 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:49,757 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:43:49,757 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-02 08:43:49,757 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 08:43:49,757 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 08:43:49,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-02-02 08:43:49,758 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2018-02-02 08:43:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:49,857 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-02-02 08:43:49,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-02 08:43:49,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-02-02 08:43:49,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:49,860 INFO L225 Difference]: With dead ends: 31 [2018-02-02 08:43:49,860 INFO L226 Difference]: Without dead ends: 31 [2018-02-02 08:43:49,860 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-02-02 08:43:49,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-02-02 08:43:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-02-02 08:43:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-02-02 08:43:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-02-02 08:43:49,863 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2018-02-02 08:43:49,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:49,864 INFO L432 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-02-02 08:43:49,864 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 08:43:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-02-02 08:43:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 08:43:49,864 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:49,864 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:43:49,865 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1525480681, now seen corresponding path program 1 times [2018-02-02 08:43:49,865 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:49,865 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:49,866 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,866 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:49,866 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:49,884 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:49,962 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:43:49,962 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 08:43:49,968 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:49,990 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:43:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:50,041 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:43:50,041 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-02-02 08:43:50,042 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 08:43:50,042 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 08:43:50,042 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-02-02 08:43:50,042 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2018-02-02 08:43:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:50,100 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2018-02-02 08:43:50,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-02 08:43:50,101 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-02-02 08:43:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:50,102 INFO L225 Difference]: With dead ends: 48 [2018-02-02 08:43:50,102 INFO L226 Difference]: Without dead ends: 48 [2018-02-02 08:43:50,102 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-02-02 08:43:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-02-02 08:43:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2018-02-02 08:43:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-02-02 08:43:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2018-02-02 08:43:50,106 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 20 [2018-02-02 08:43:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:50,107 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2018-02-02 08:43:50,107 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 08:43:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2018-02-02 08:43:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 08:43:50,108 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:50,108 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:43:50,108 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2112286695, now seen corresponding path program 1 times [2018-02-02 08:43:50,108 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:50,108 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:50,109 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:50,110 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:50,110 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:50,122 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:50,223 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:43:50,224 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 08:43:50,229 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:50,261 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:43:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:50,305 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:43:50,305 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-02-02 08:43:50,306 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-02-02 08:43:50,306 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-02-02 08:43:50,306 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-02-02 08:43:50,306 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 10 states. [2018-02-02 08:43:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:50,380 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2018-02-02 08:43:50,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-02 08:43:50,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-02-02 08:43:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:50,383 INFO L225 Difference]: With dead ends: 73 [2018-02-02 08:43:50,383 INFO L226 Difference]: Without dead ends: 73 [2018-02-02 08:43:50,383 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-02-02 08:43:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-02-02 08:43:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 42. [2018-02-02 08:43:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-02 08:43:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-02-02 08:43:50,393 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 20 [2018-02-02 08:43:50,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:50,393 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-02-02 08:43:50,393 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-02-02 08:43:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-02-02 08:43:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 08:43:50,394 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:50,394 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:43:50,394 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1171563351, now seen corresponding path program 1 times [2018-02-02 08:43:50,394 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:50,394 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:50,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:50,395 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:50,395 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:50,405 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:50,600 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:43:50,600 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 08:43:50,611 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:50,630 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:43:50,652 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-02-02 08:43:50,654 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 08:43:50,659 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 08:43:50,660 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2018-02-02 08:43:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:50,837 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:43:50,837 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-02-02 08:43:50,838 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-02-02 08:43:50,838 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-02-02 08:43:50,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2018-02-02 08:43:50,839 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 22 states. [2018-02-02 08:43:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:51,119 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2018-02-02 08:43:51,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-02 08:43:51,120 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 20 [2018-02-02 08:43:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:51,120 INFO L225 Difference]: With dead ends: 51 [2018-02-02 08:43:51,120 INFO L226 Difference]: Without dead ends: 51 [2018-02-02 08:43:51,121 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2018-02-02 08:43:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-02-02 08:43:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2018-02-02 08:43:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-02-02 08:43:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2018-02-02 08:43:51,123 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 20 [2018-02-02 08:43:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:51,123 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2018-02-02 08:43:51,124 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-02-02 08:43:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2018-02-02 08:43:51,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-02-02 08:43:51,124 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:51,124 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] [2018-02-02 08:43:51,124 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1556914830, now seen corresponding path program 1 times [2018-02-02 08:43:51,124 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:51,124 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:51,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:51,125 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:51,125 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:51,132 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:51,193 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:43:51,193 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-02-02 08:43:51,194 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-02 08:43:51,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-02 08:43:51,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-02-02 08:43:51,194 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 6 states. [2018-02-02 08:43:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:51,218 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2018-02-02 08:43:51,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-02 08:43:51,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-02-02 08:43:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:51,219 INFO L225 Difference]: With dead ends: 59 [2018-02-02 08:43:51,219 INFO L226 Difference]: Without dead ends: 59 [2018-02-02 08:43:51,219 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-02-02 08:43:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-02-02 08:43:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2018-02-02 08:43:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-02-02 08:43:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2018-02-02 08:43:51,224 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 21 [2018-02-02 08:43:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:51,224 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2018-02-02 08:43:51,224 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-02 08:43:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2018-02-02 08:43:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-02-02 08:43:51,226 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:51,226 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] [2018-02-02 08:43:51,226 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:51,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1726935216, now seen corresponding path program 1 times [2018-02-02 08:43:51,226 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:51,226 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:51,227 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:51,227 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:51,227 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:51,235 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:51,267 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:43:51,267 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 08:43:51,267 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:43:51,267 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:43:51,268 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:43:51,268 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 4 states. [2018-02-02 08:43:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:51,287 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2018-02-02 08:43:51,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 08:43:51,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2018-02-02 08:43:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:51,287 INFO L225 Difference]: With dead ends: 51 [2018-02-02 08:43:51,287 INFO L226 Difference]: Without dead ends: 25 [2018-02-02 08:43:51,287 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:43:51,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-02-02 08:43:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-02-02 08:43:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-02-02 08:43:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-02-02 08:43:51,289 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 21 [2018-02-02 08:43:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:51,289 INFO L432 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-02-02 08:43:51,289 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:43:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-02-02 08:43:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-02-02 08:43:51,290 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:43:51,290 INFO L351 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:43:51,290 INFO L371 AbstractCegarLoop]: === Iteration 10 === [cbzeroErr0RequiresViolation, cbzeroErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 08:43:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash 964772623, now seen corresponding path program 2 times [2018-02-02 08:43:51,290 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:43:51,291 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:43:51,291 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:51,291 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:43:51,292 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:43:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:43:51,304 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:43:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:51,491 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:43:51,491 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 08:43:51,495 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 08:43:51,505 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-02-02 08:43:51,510 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-02-02 08:43:51,512 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 08:43:51,514 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:43:51,520 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-02-02 08:43:51,521 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 08:43:51,527 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 08:43:51,527 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2018-02-02 08:43:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:43:51,823 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:43:51,824 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2018-02-02 08:43:51,824 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-02-02 08:43:51,824 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-02-02 08:43:51,825 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2018-02-02 08:43:51,825 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 27 states. [2018-02-02 08:43:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:43:52,254 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-02-02 08:43:52,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-02-02 08:43:52,254 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 24 [2018-02-02 08:43:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:43:52,255 INFO L225 Difference]: With dead ends: 29 [2018-02-02 08:43:52,255 INFO L226 Difference]: Without dead ends: 0 [2018-02-02 08:43:52,255 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2018-02-02 08:43:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-02 08:43:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-02 08:43:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-02 08:43:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-02 08:43:52,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-02-02 08:43:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:43:52,256 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-02 08:43:52,256 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-02-02 08:43:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-02 08:43:52,256 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-02 08:43:52,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 08:43:52 BoogieIcfgContainer [2018-02-02 08:43:52,259 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 08:43:52,260 INFO L168 Benchmark]: Toolchain (without parser) took 3529.92 ms. Allocated memory was 401.6 MB in the beginning and 662.2 MB in the end (delta: 260.6 MB). Free memory was 359.8 MB in the beginning and 444.9 MB in the end (delta: -85.1 MB). Peak memory consumption was 175.5 MB. Max. memory is 5.3 GB. [2018-02-02 08:43:52,261 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 401.6 MB. Free memory is still 365.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 08:43:52,261 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.53 ms. Allocated memory is still 401.6 MB. Free memory was 358.5 MB in the beginning and 349.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 5.3 GB. [2018-02-02 08:43:52,261 INFO L168 Benchmark]: Boogie Preprocessor took 27.68 ms. Allocated memory is still 401.6 MB. Free memory was 349.2 MB in the beginning and 346.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 08:43:52,261 INFO L168 Benchmark]: RCFGBuilder took 158.21 ms. Allocated memory is still 401.6 MB. Free memory was 346.6 MB in the beginning and 332.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 5.3 GB. [2018-02-02 08:43:52,262 INFO L168 Benchmark]: TraceAbstraction took 3191.86 ms. Allocated memory was 401.6 MB in the beginning and 662.2 MB in the end (delta: 260.6 MB). Free memory was 331.2 MB in the beginning and 444.9 MB in the end (delta: -113.7 MB). Peak memory consumption was 146.9 MB. Max. memory is 5.3 GB. [2018-02-02 08:43:52,263 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 401.6 MB. Free memory is still 365.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 149.53 ms. Allocated memory is still 401.6 MB. Free memory was 358.5 MB in the beginning and 349.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 27.68 ms. Allocated memory is still 401.6 MB. Free memory was 349.2 MB in the beginning and 346.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 158.21 ms. Allocated memory is still 401.6 MB. Free memory was 346.6 MB in the beginning and 332.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 3191.86 ms. Allocated memory was 401.6 MB in the beginning and 662.2 MB in the end (delta: 260.6 MB). Free memory was 331.2 MB in the beginning and 444.9 MB in the end (delta: -113.7 MB). Peak memory consumption was 146.9 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: 547]: 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, 29 locations, 3 error locations. SAFE Result, 3.1s OverallTime, 10 OverallIterations, 3 TraceHistogramMax, 1.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 219 SDtfs, 219 SDslu, 923 SDs, 0 SdLazy, 667 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=8, 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, 10 MinimizatonAttempts, 56 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 262 NumberOfCodeBlocks, 262 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 248 ConstructedInterpolants, 2 QuantifiedInterpolants, 31057 SizeOfPredicates, 30 NumberOfNonLiveVariables, 425 ConjunctsInSsa, 122 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 4/38 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_cbzero-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_08-43-52-270.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cbzero-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-02_08-43-52-270.csv Received shutdown request...