java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-memsafety/count_down-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-a74eeac-m [2018-02-02 18:21:02,977 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 18:21:02,978 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 18:21:02,989 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 18:21:02,989 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 18:21:02,990 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 18:21:02,991 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 18:21:02,993 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 18:21:02,994 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 18:21:02,995 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 18:21:02,996 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 18:21:02,996 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 18:21:02,997 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 18:21:02,998 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 18:21:02,998 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 18:21:03,000 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 18:21:03,002 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 18:21:03,003 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 18:21:03,004 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 18:21:03,005 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 18:21:03,006 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-02 18:21:03,010 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 18:21:03,011 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 18:21:03,011 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-02 18:21:03,020 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 18:21:03,021 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 18:21:03,021 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 18:21:03,022 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 18:21:03,022 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 18:21:03,022 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 18:21:03,022 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 18:21:03,022 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 18:21:03,022 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 18:21:03,023 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 18:21:03,023 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 18:21:03,023 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 18:21:03,023 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 18:21:03,023 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 18:21:03,023 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 18:21:03,024 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 18:21:03,024 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 18:21:03,024 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 18:21:03,024 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 18:21:03,024 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 18:21:03,024 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 18:21:03,024 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 18:21:03,025 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 18:21:03,025 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 18:21:03,025 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 18:21:03,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 18:21:03,062 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 18:21:03,065 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 18:21:03,066 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 18:21:03,066 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 18:21:03,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/count_down-alloca_true-valid-memsafety_true-termination.i [2018-02-02 18:21:03,188 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 18:21:03,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 18:21:03,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 18:21:03,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 18:21:03,193 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 18:21:03,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:21:03" (1/1) ... [2018-02-02 18:21:03,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1482aa0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03, skipping insertion in model container [2018-02-02 18:21:03,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:21:03" (1/1) ... [2018-02-02 18:21:03,206 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:21:03,231 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:21:03,321 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:21:03,334 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:21:03,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03 WrapperNode [2018-02-02 18:21:03,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 18:21:03,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 18:21:03,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 18:21:03,340 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 18:21:03,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03" (1/1) ... [2018-02-02 18:21:03,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03" (1/1) ... [2018-02-02 18:21:03,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03" (1/1) ... [2018-02-02 18:21:03,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03" (1/1) ... [2018-02-02 18:21:03,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03" (1/1) ... [2018-02-02 18:21:03,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03" (1/1) ... [2018-02-02 18:21:03,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03" (1/1) ... [2018-02-02 18:21:03,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 18:21:03,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 18:21:03,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 18:21:03,366 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 18:21:03,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03" (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 18:21:03,410 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 18:21:03,410 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 18:21:03,410 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 18:21:03,411 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 18:21:03,411 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 18:21:03,411 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 18:21:03,411 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 18:21:03,411 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 18:21:03,411 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 18:21:03,411 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 18:21:03,412 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 18:21:03,412 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 18:21:03,606 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 18:21:03,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:21:03 BoogieIcfgContainer [2018-02-02 18:21:03,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 18:21:03,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 18:21:03,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 18:21:03,608 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 18:21:03,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 06:21:03" (1/3) ... [2018-02-02 18:21:03,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8145b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:21:03, skipping insertion in model container [2018-02-02 18:21:03,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:21:03" (2/3) ... [2018-02-02 18:21:03,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8145b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:21:03, skipping insertion in model container [2018-02-02 18:21:03,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:21:03" (3/3) ... [2018-02-02 18:21:03,610 INFO L107 eAbstractionObserver]: Analyzing ICFG count_down-alloca_true-valid-memsafety_true-termination.i [2018-02-02 18:21:03,616 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 18:21:03,620 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-02-02 18:21:03,650 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 18:21:03,650 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 18:21:03,650 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 18:21:03,650 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 18:21:03,650 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 18:21:03,651 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 18:21:03,651 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 18:21:03,651 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 18:21:03,652 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 18:21:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-02-02 18:21:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 18:21:03,670 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:03,671 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:03,671 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:03,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1460855103, now seen corresponding path program 1 times [2018-02-02 18:21:03,677 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:03,677 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:03,715 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:03,715 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:03,715 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:03,765 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:03,805 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 18:21:03,807 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:21:03,807 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 18:21:03,808 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:21:03,816 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:21:03,816 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:21:03,818 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2018-02-02 18:21:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:03,891 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-02-02 18:21:03,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:21:03,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-02 18:21:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:03,943 INFO L225 Difference]: With dead ends: 42 [2018-02-02 18:21:03,944 INFO L226 Difference]: Without dead ends: 39 [2018-02-02 18:21:03,945 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 18:21:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-02-02 18:21:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-02-02 18:21:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-02-02 18:21:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-02-02 18:21:03,969 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2018-02-02 18:21:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:03,969 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-02-02 18:21:03,970 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:21:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-02-02 18:21:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-02 18:21:03,970 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:03,970 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:03,970 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1955174720, now seen corresponding path program 1 times [2018-02-02 18:21:03,971 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:03,971 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:03,972 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:03,972 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:03,972 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:03,983 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:04,028 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:21:04,028 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 18:21:04,029 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:21:04,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:21:04,030 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:21:04,030 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 4 states. [2018-02-02 18:21:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:04,103 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-02-02 18:21:04,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 18:21:04,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-02-02 18:21:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:04,105 INFO L225 Difference]: With dead ends: 35 [2018-02-02 18:21:04,105 INFO L226 Difference]: Without dead ends: 35 [2018-02-02 18:21:04,106 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:21:04,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-02-02 18:21:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-02-02 18:21:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-02-02 18:21:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-02-02 18:21:04,110 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 14 [2018-02-02 18:21:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:04,110 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-02-02 18:21:04,111 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:21:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-02-02 18:21:04,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-02 18:21:04,111 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:04,111 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:04,112 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:04,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1955174719, now seen corresponding path program 1 times [2018-02-02 18:21:04,112 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:04,112 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:04,113 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:04,113 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:04,113 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:04,127 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:04,244 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 18:21:04,245 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:21:04,245 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-02 18:21:04,245 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-02 18:21:04,245 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-02 18:21:04,246 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-02-02 18:21:04,246 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2018-02-02 18:21:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:04,480 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2018-02-02 18:21:04,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-02 18:21:04,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-02-02 18:21:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:04,482 INFO L225 Difference]: With dead ends: 69 [2018-02-02 18:21:04,482 INFO L226 Difference]: Without dead ends: 69 [2018-02-02 18:21:04,483 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-02-02 18:21:04,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-02-02 18:21:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2018-02-02 18:21:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-02-02 18:21:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-02-02 18:21:04,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 14 [2018-02-02 18:21:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:04,488 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-02-02 18:21:04,488 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-02 18:21:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-02-02 18:21:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 18:21:04,489 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:04,489 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:04,489 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1688741209, now seen corresponding path program 1 times [2018-02-02 18:21:04,490 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:04,490 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:04,490 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:04,491 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:04,491 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:04,505 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:04,530 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 18:21:04,530 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:21:04,531 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 18:21:04,531 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:21:04,531 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:21:04,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:21:04,532 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 4 states. [2018-02-02 18:21:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:04,547 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2018-02-02 18:21:04,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 18:21:04,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-02-02 18:21:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:04,548 INFO L225 Difference]: With dead ends: 40 [2018-02-02 18:21:04,548 INFO L226 Difference]: Without dead ends: 40 [2018-02-02 18:21:04,549 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:21:04,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-02-02 18:21:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-02-02 18:21:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-02-02 18:21:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-02-02 18:21:04,552 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 17 [2018-02-02 18:21:04,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:04,552 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2018-02-02 18:21:04,552 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:21:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2018-02-02 18:21:04,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-02-02 18:21:04,553 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:04,553 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:04,553 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2068353263, now seen corresponding path program 1 times [2018-02-02 18:21:04,553 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:04,553 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:04,554 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:04,554 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:04,555 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:04,567 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:04,610 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:21:04,610 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 18:21:04,619 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:04,639 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:21:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:04,687 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-02-02 18:21:04,687 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2018-02-02 18:21:04,687 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-02-02 18:21:04,688 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-02-02 18:21:04,688 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-02-02 18:21:04,688 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 7 states. [2018-02-02 18:21:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:04,715 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-02-02 18:21:04,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-02 18:21:04,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-02-02 18:21:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:04,718 INFO L225 Difference]: With dead ends: 68 [2018-02-02 18:21:04,718 INFO L226 Difference]: Without dead ends: 68 [2018-02-02 18:21:04,719 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-02-02 18:21:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-02-02 18:21:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2018-02-02 18:21:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-02-02 18:21:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2018-02-02 18:21:04,721 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 19 [2018-02-02 18:21:04,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:04,722 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2018-02-02 18:21:04,722 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-02-02 18:21:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2018-02-02 18:21:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-02-02 18:21:04,722 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:04,722 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:04,722 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1639808019, now seen corresponding path program 1 times [2018-02-02 18:21:04,723 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:04,723 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:04,723 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:04,724 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:04,724 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:04,734 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:04,831 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:21:04,831 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 18:21:04,842 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:04,856 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:21:04,881 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 8 treesize of output 7 [2018-02-02 18:21:04,882 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:21:04,885 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:21:04,885 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2018-02-02 18:21:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:04,955 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:21:04,955 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-02-02 18:21:04,956 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 18:21:04,956 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 18:21:04,956 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-02-02 18:21:04,956 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 8 states. [2018-02-02 18:21:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:05,041 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2018-02-02 18:21:05,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-02 18:21:05,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-02-02 18:21:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:05,042 INFO L225 Difference]: With dead ends: 49 [2018-02-02 18:21:05,043 INFO L226 Difference]: Without dead ends: 49 [2018-02-02 18:21:05,043 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-02-02 18:21:05,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-02 18:21:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2018-02-02 18:21:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-02-02 18:21:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2018-02-02 18:21:05,047 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2018-02-02 18:21:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:05,047 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2018-02-02 18:21:05,047 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 18:21:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2018-02-02 18:21:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-02 18:21:05,048 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:05,048 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:05,048 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:05,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1536064265, now seen corresponding path program 1 times [2018-02-02 18:21:05,048 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:05,048 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:05,049 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:05,049 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:05,049 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:05,058 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:05,143 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:21:05,144 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:21:05,154 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:05,171 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:21:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:05,271 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:21:05,271 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2018-02-02 18:21:05,271 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-02-02 18:21:05,271 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-02-02 18:21:05,271 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-02-02 18:21:05,272 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 14 states. [2018-02-02 18:21:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:05,432 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-02-02 18:21:05,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-02 18:21:05,432 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-02-02 18:21:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:05,433 INFO L225 Difference]: With dead ends: 58 [2018-02-02 18:21:05,433 INFO L226 Difference]: Without dead ends: 58 [2018-02-02 18:21:05,433 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2018-02-02 18:21:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-02-02 18:21:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2018-02-02 18:21:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-02-02 18:21:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2018-02-02 18:21:05,437 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2018-02-02 18:21:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:05,438 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2018-02-02 18:21:05,438 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-02-02 18:21:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2018-02-02 18:21:05,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-02-02 18:21:05,439 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:05,439 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:05,439 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2040947294, now seen corresponding path program 1 times [2018-02-02 18:21:05,439 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:05,439 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:05,440 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:05,440 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:05,440 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:05,449 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:05,570 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:21:05,570 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:21:05,575 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:05,585 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:21:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-02-02 18:21:05,622 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-02-02 18:21:05,623 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2018-02-02 18:21:05,623 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-02-02 18:21:05,623 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-02-02 18:21:05,623 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-02-02 18:21:05,623 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 12 states. [2018-02-02 18:21:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:05,787 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2018-02-02 18:21:05,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-02-02 18:21:05,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-02-02 18:21:05,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:05,788 INFO L225 Difference]: With dead ends: 73 [2018-02-02 18:21:05,788 INFO L226 Difference]: Without dead ends: 73 [2018-02-02 18:21:05,788 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2018-02-02 18:21:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-02-02 18:21:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2018-02-02 18:21:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-02-02 18:21:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2018-02-02 18:21:05,791 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 28 [2018-02-02 18:21:05,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:05,792 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2018-02-02 18:21:05,792 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-02-02 18:21:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2018-02-02 18:21:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-02-02 18:21:05,793 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:05,793 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:05,793 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:05,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2035165284, now seen corresponding path program 1 times [2018-02-02 18:21:05,793 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:05,793 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:05,794 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:05,794 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:05,794 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:05,801 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:05,906 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:21:05,906 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 18:21:05,911 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:05,920 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:21:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:05,978 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:21:05,979 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2018-02-02 18:21:05,979 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-02 18:21:05,979 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-02 18:21:05,979 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-02-02 18:21:05,979 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 15 states. [2018-02-02 18:21:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:06,265 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2018-02-02 18:21:06,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-02-02 18:21:06,266 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-02-02 18:21:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:06,266 INFO L225 Difference]: With dead ends: 94 [2018-02-02 18:21:06,266 INFO L226 Difference]: Without dead ends: 94 [2018-02-02 18:21:06,267 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2018-02-02 18:21:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-02-02 18:21:06,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2018-02-02 18:21:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-02-02 18:21:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2018-02-02 18:21:06,269 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 28 [2018-02-02 18:21:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:06,270 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2018-02-02 18:21:06,270 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-02 18:21:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2018-02-02 18:21:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-02-02 18:21:06,270 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:06,270 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:06,270 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1450783205, now seen corresponding path program 1 times [2018-02-02 18:21:06,271 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:06,271 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:06,271 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:06,271 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:06,271 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:06,281 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-02-02 18:21:06,315 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:21:06,316 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 18:21:06,316 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:21:06,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:21:06,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:21:06,316 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 4 states. [2018-02-02 18:21:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:06,339 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2018-02-02 18:21:06,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:21:06,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-02-02 18:21:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:06,340 INFO L225 Difference]: With dead ends: 72 [2018-02-02 18:21:06,341 INFO L226 Difference]: Without dead ends: 45 [2018-02-02 18:21:06,341 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 18:21:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-02-02 18:21:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-02-02 18:21:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-02-02 18:21:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2018-02-02 18:21:06,344 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 30 [2018-02-02 18:21:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:06,344 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2018-02-02 18:21:06,344 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:21:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2018-02-02 18:21:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-02-02 18:21:06,345 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:21:06,345 INFO L351 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:21:06,345 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 18:21:06,345 INFO L82 PathProgramCache]: Analyzing trace with hash 262979632, now seen corresponding path program 2 times [2018-02-02 18:21:06,345 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:21:06,345 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:21:06,346 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:06,346 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:21:06,346 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:21:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:21:06,355 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:21:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-02-02 18:21:06,407 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:21:06,408 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 18:21:06,416 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:21:06,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:21:06,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:21:06,433 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:21:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:21:06,556 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:21:06,557 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-02-02 18:21:06,557 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-02 18:21:06,557 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-02 18:21:06,557 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-02-02 18:21:06,557 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 15 states. [2018-02-02 18:21:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:21:06,759 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2018-02-02 18:21:06,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-02 18:21:06,760 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2018-02-02 18:21:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:21:06,760 INFO L225 Difference]: With dead ends: 55 [2018-02-02 18:21:06,760 INFO L226 Difference]: Without dead ends: 0 [2018-02-02 18:21:06,760 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2018-02-02 18:21:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-02 18:21:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-02 18:21:06,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-02 18:21:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-02 18:21:06,761 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-02-02 18:21:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:21:06,761 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-02 18:21:06,761 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-02 18:21:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-02 18:21:06,761 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-02 18:21:06,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 06:21:06 BoogieIcfgContainer [2018-02-02 18:21:06,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 18:21:06,765 INFO L168 Benchmark]: Toolchain (without parser) took 3576.56 ms. Allocated memory was 401.6 MB in the beginning and 665.3 MB in the end (delta: 263.7 MB). Free memory was 359.8 MB in the beginning and 469.4 MB in the end (delta: -109.6 MB). Peak memory consumption was 154.1 MB. Max. memory is 5.3 GB. [2018-02-02 18:21:06,765 INFO L168 Benchmark]: CDTParser took 0.13 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 18:21:06,766 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.24 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: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-02 18:21:06,766 INFO L168 Benchmark]: Boogie Preprocessor took 25.30 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 18:21:06,766 INFO L168 Benchmark]: RCFGBuilder took 240.73 ms. Allocated memory is still 401.6 MB. Free memory was 346.6 MB in the beginning and 329.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 5.3 GB. [2018-02-02 18:21:06,766 INFO L168 Benchmark]: TraceAbstraction took 3157.85 ms. Allocated memory was 401.6 MB in the beginning and 665.3 MB in the end (delta: 263.7 MB). Free memory was 328.5 MB in the beginning and 469.4 MB in the end (delta: -140.9 MB). Peak memory consumption was 122.8 MB. Max. memory is 5.3 GB. [2018-02-02 18:21:06,767 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 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 150.24 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: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 25.30 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 240.73 ms. Allocated memory is still 401.6 MB. Free memory was 346.6 MB in the beginning and 329.8 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 3157.85 ms. Allocated memory was 401.6 MB in the beginning and 665.3 MB in the end (delta: 263.7 MB). Free memory was 328.5 MB in the beginning and 469.4 MB in the end (delta: -140.9 MB). Peak memory consumption was 122.8 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: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 9 error locations. SAFE Result, 3.1s OverallTime, 11 OverallIterations, 3 TraceHistogramMax, 1.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 313 SDtfs, 1362 SDslu, 754 SDs, 0 SdLazy, 715 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=9, 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, 11 MinimizatonAttempts, 82 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 386 NumberOfCodeBlocks, 386 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 369 ConstructedInterpolants, 24 QuantifiedInterpolants, 62973 SizeOfPredicates, 14 NumberOfNonLiveVariables, 467 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 43/74 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/count_down-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_18-21-06-773.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/count_down-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-02_18-21-06-773.csv Received shutdown request...