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/count_down-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-26d9e06-m [2018-02-02 08:40:48,826 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 08:40:48,827 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 08:40:48,837 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 08:40:48,837 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 08:40:48,838 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 08:40:48,839 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 08:40:48,840 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 08:40:48,842 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 08:40:48,843 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 08:40:48,843 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 08:40:48,843 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 08:40:48,844 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 08:40:48,845 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 08:40:48,846 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 08:40:48,848 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 08:40:48,849 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 08:40:48,851 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 08:40:48,852 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 08:40:48,853 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 08:40:48,854 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-02 08:40:48,855 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-02 08:40:48,855 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-02 08:40:48,856 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-02 08:40:48,856 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-02 08:40:48,857 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-02 08:40:48,858 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-02 08:40:48,858 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-02 08:40:48,858 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-02 08:40:48,858 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 08:40:48,859 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 08:40:48,859 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 08:40:48,869 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 08:40:48,869 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 08:40:48,870 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 08:40:48,870 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 08:40:48,870 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 08:40:48,870 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 08:40:48,871 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 08:40:48,871 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 08:40:48,871 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 08:40:48,871 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 08:40:48,871 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 08:40:48,871 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 08:40:48,872 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 08:40:48,872 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 08:40:48,872 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 08:40:48,872 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 08:40:48,872 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 08:40:48,872 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 08:40:48,873 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 08:40:48,873 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 08:40:48,873 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 08:40:48,873 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 08:40:48,873 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 08:40:48,873 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 08:40:48,873 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 08:40:48,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 08:40:48,921 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 08:40:48,924 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 08:40:48,925 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 08:40:48,925 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 08:40:48,926 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/count_down-alloca_true-valid-memsafety_true-termination.i [2018-02-02 08:40:49,078 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 08:40:49,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 08:40:49,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 08:40:49,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 08:40:49,086 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 08:40:49,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:40:49" (1/1) ... [2018-02-02 08:40:49,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b546732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49, skipping insertion in model container [2018-02-02 08:40:49,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:40:49" (1/1) ... [2018-02-02 08:40:49,103 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:40:49,130 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 08:40:49,216 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:40:49,227 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 08:40:49,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49 WrapperNode [2018-02-02 08:40:49,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 08:40:49,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 08:40:49,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 08:40:49,233 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 08:40:49,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49" (1/1) ... [2018-02-02 08:40:49,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49" (1/1) ... [2018-02-02 08:40:49,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49" (1/1) ... [2018-02-02 08:40:49,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49" (1/1) ... [2018-02-02 08:40:49,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49" (1/1) ... [2018-02-02 08:40:49,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49" (1/1) ... [2018-02-02 08:40:49,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49" (1/1) ... [2018-02-02 08:40:49,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 08:40:49,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 08:40:49,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 08:40:49,260 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 08:40:49,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49" (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 08:40:49,297 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 08:40:49,297 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 08:40:49,297 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 08:40:49,298 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 08:40:49,298 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 08:40:49,298 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 08:40:49,298 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 08:40:49,298 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 08:40:49,298 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 08:40:49,298 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 08:40:49,298 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 08:40:49,298 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 08:40:49,472 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 08:40:49,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:40:49 BoogieIcfgContainer [2018-02-02 08:40:49,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 08:40:49,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 08:40:49,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 08:40:49,476 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 08:40:49,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 08:40:49" (1/3) ... [2018-02-02 08:40:49,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a051ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:40:49, skipping insertion in model container [2018-02-02 08:40:49,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:40:49" (2/3) ... [2018-02-02 08:40:49,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a051ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:40:49, skipping insertion in model container [2018-02-02 08:40:49,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:40:49" (3/3) ... [2018-02-02 08:40:49,480 INFO L107 eAbstractionObserver]: Analyzing ICFG count_down-alloca_true-valid-memsafety_true-termination.i [2018-02-02 08:40:49,485 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 08:40:49,491 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2018-02-02 08:40:49,520 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 08:40:49,520 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 08:40:49,520 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 08:40:49,520 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 08:40:49,521 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 08:40:49,521 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 08:40:49,521 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 08:40:49,521 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 08:40:49,522 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 08:40:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2018-02-02 08:40:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-02-02 08:40:49,541 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:49,542 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:40:49,542 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:49,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1460855103, now seen corresponding path program 1 times [2018-02-02 08:40:49,547 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:49,547 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:49,591 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:49,591 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:49,591 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:49,639 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:49,686 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 08:40:49,688 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:40:49,688 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 08:40:49,689 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:40:49,697 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:40:49,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:40:49,699 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2018-02-02 08:40:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:49,814 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2018-02-02 08:40:49,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 08:40:49,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-02-02 08:40:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:49,820 INFO L225 Difference]: With dead ends: 42 [2018-02-02 08:40:49,820 INFO L226 Difference]: Without dead ends: 39 [2018-02-02 08:40:49,822 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 08:40:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-02-02 08:40:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-02-02 08:40:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-02-02 08:40:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2018-02-02 08:40:49,843 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2018-02-02 08:40:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:49,844 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2018-02-02 08:40:49,844 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:40:49,844 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2018-02-02 08:40:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-02 08:40:49,844 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:49,844 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:40:49,844 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:49,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1955174720, now seen corresponding path program 1 times [2018-02-02 08:40:49,845 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:49,845 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:49,845 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:49,846 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:49,846 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:49,856 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:49,898 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 08:40:49,898 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:40:49,899 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 08:40:49,900 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:40:49,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:40:49,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:40:49,901 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 4 states. [2018-02-02 08:40:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:49,965 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2018-02-02 08:40:49,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 08:40:49,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-02-02 08:40:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:49,967 INFO L225 Difference]: With dead ends: 35 [2018-02-02 08:40:49,967 INFO L226 Difference]: Without dead ends: 35 [2018-02-02 08:40:49,968 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 08:40:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-02-02 08:40:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-02-02 08:40:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-02-02 08:40:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2018-02-02 08:40:49,972 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 14 [2018-02-02 08:40:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:49,972 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2018-02-02 08:40:49,972 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:40:49,972 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2018-02-02 08:40:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-02-02 08:40:49,973 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:49,973 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:40:49,973 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:49,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1955174719, now seen corresponding path program 1 times [2018-02-02 08:40:49,973 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:49,973 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:49,974 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:49,975 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:49,975 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:49,988 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:50,096 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 08:40:50,096 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:40:50,096 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-02 08:40:50,096 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-02 08:40:50,097 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-02 08:40:50,097 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-02-02 08:40:50,097 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2018-02-02 08:40:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:50,251 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2018-02-02 08:40:50,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-02 08:40:50,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-02-02 08:40:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:50,253 INFO L225 Difference]: With dead ends: 69 [2018-02-02 08:40:50,254 INFO L226 Difference]: Without dead ends: 69 [2018-02-02 08:40:50,254 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-02-02 08:40:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-02-02 08:40:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2018-02-02 08:40:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-02-02 08:40:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-02-02 08:40:50,258 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 14 [2018-02-02 08:40:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:50,259 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2018-02-02 08:40:50,259 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-02 08:40:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2018-02-02 08:40:50,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 08:40:50,260 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:50,260 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 08:40:50,260 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1688741209, now seen corresponding path program 1 times [2018-02-02 08:40:50,260 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:50,260 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:50,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:50,261 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:50,261 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:50,270 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:50,289 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 08:40:50,289 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:40:50,289 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 08:40:50,289 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:40:50,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:40:50,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:40:50,290 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 4 states. [2018-02-02 08:40:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:50,302 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2018-02-02 08:40:50,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 08:40:50,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-02-02 08:40:50,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:50,302 INFO L225 Difference]: With dead ends: 40 [2018-02-02 08:40:50,302 INFO L226 Difference]: Without dead ends: 40 [2018-02-02 08:40:50,303 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 08:40:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-02-02 08:40:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-02-02 08:40:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-02-02 08:40:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-02-02 08:40:50,305 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 17 [2018-02-02 08:40:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:50,305 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2018-02-02 08:40:50,305 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:40:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2018-02-02 08:40:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-02-02 08:40:50,305 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:50,305 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:40:50,305 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:50,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2068353263, now seen corresponding path program 1 times [2018-02-02 08:40:50,306 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:50,306 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:50,307 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:50,307 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:50,307 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:50,319 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:50,357 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 08:40:50,358 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:40:50,358 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 08:40:50,364 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:50,381 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:40:50,416 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 08:40:50,437 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-02-02 08:40:50,438 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2018-02-02 08:40:50,438 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-02-02 08:40:50,438 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-02-02 08:40:50,438 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-02-02 08:40:50,439 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 7 states. [2018-02-02 08:40:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:50,462 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2018-02-02 08:40:50,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-02 08:40:50,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-02-02 08:40:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:50,463 INFO L225 Difference]: With dead ends: 68 [2018-02-02 08:40:50,463 INFO L226 Difference]: Without dead ends: 68 [2018-02-02 08:40:50,463 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 08:40:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-02-02 08:40:50,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2018-02-02 08:40:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-02-02 08:40:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2018-02-02 08:40:50,466 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 19 [2018-02-02 08:40:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:50,466 INFO L432 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2018-02-02 08:40:50,466 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-02-02 08:40:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2018-02-02 08:40:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-02-02 08:40:50,466 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:50,466 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 08:40:50,466 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1639808019, now seen corresponding path program 1 times [2018-02-02 08:40:50,467 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:50,467 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:50,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:50,467 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:50,467 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:50,475 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:50,600 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 08:40:50,600 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:40:50,601 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 08:40:50,612 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:50,622 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:40:50,639 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 08:40:50,641 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 08:40:50,644 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 08:40:50,644 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2018-02-02 08:40:50,681 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 08:40:50,698 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:40:50,698 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-02-02 08:40:50,698 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 08:40:50,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 08:40:50,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-02-02 08:40:50,699 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 8 states. [2018-02-02 08:40:50,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:50,795 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2018-02-02 08:40:50,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-02 08:40:50,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-02-02 08:40:50,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:50,796 INFO L225 Difference]: With dead ends: 49 [2018-02-02 08:40:50,796 INFO L226 Difference]: Without dead ends: 49 [2018-02-02 08:40:50,796 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 08:40:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-02 08:40:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2018-02-02 08:40:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-02-02 08:40:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2018-02-02 08:40:50,800 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2018-02-02 08:40:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:50,801 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2018-02-02 08:40:50,801 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 08:40:50,801 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2018-02-02 08:40:50,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-02 08:40:50,801 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:50,801 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 08:40:50,802 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1536064265, now seen corresponding path program 1 times [2018-02-02 08:40:50,802 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:50,802 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:50,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:50,803 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:50,803 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:50,813 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:40:50,897 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:40:50,897 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 08:40:50,906 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:50,925 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:40:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 08:40:51,041 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:40:51,041 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2018-02-02 08:40:51,041 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-02-02 08:40:51,042 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-02-02 08:40:51,042 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-02-02 08:40:51,042 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 14 states. [2018-02-02 08:40:51,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:51,201 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2018-02-02 08:40:51,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-02 08:40:51,201 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2018-02-02 08:40:51,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:51,202 INFO L225 Difference]: With dead ends: 58 [2018-02-02 08:40:51,202 INFO L226 Difference]: Without dead ends: 58 [2018-02-02 08:40:51,202 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 08:40:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-02-02 08:40:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2018-02-02 08:40:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-02-02 08:40:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2018-02-02 08:40:51,207 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2018-02-02 08:40:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:51,207 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2018-02-02 08:40:51,208 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-02-02 08:40:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2018-02-02 08:40:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-02-02 08:40:51,208 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:51,208 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 08:40:51,208 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:51,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2040947294, now seen corresponding path program 1 times [2018-02-02 08:40:51,209 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:51,209 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:51,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:51,210 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:51,210 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:51,218 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:51,353 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 08:40:51,353 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:40:51,354 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 08:40:51,358 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:51,369 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:40:51,389 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 08:40:51,406 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-02-02 08:40:51,406 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2018-02-02 08:40:51,406 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-02-02 08:40:51,406 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-02-02 08:40:51,406 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-02-02 08:40:51,406 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 12 states. [2018-02-02 08:40:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:51,577 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2018-02-02 08:40:51,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-02-02 08:40:51,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-02-02 08:40:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:51,578 INFO L225 Difference]: With dead ends: 73 [2018-02-02 08:40:51,579 INFO L226 Difference]: Without dead ends: 73 [2018-02-02 08:40:51,579 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 08:40:51,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-02-02 08:40:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2018-02-02 08:40:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-02-02 08:40:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2018-02-02 08:40:51,582 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 28 [2018-02-02 08:40:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:51,582 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2018-02-02 08:40:51,582 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-02-02 08:40:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2018-02-02 08:40:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-02-02 08:40:51,583 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:51,583 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 08:40:51,583 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2035165284, now seen corresponding path program 1 times [2018-02-02 08:40:51,583 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:51,583 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:51,584 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:51,584 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:51,584 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:51,591 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:51,714 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 08:40:51,715 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:40:51,715 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 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 08:40:51,719 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:51,729 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:40:51,762 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 08:40:51,789 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:40:51,789 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2018-02-02 08:40:51,789 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-02 08:40:51,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-02 08:40:51,790 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2018-02-02 08:40:51,790 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 15 states. [2018-02-02 08:40:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:52,001 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2018-02-02 08:40:52,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-02-02 08:40:52,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-02-02 08:40:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:52,002 INFO L225 Difference]: With dead ends: 94 [2018-02-02 08:40:52,002 INFO L226 Difference]: Without dead ends: 94 [2018-02-02 08:40:52,002 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 08:40:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-02-02 08:40:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2018-02-02 08:40:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-02-02 08:40:52,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2018-02-02 08:40:52,005 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 28 [2018-02-02 08:40:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:52,005 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2018-02-02 08:40:52,005 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-02 08:40:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2018-02-02 08:40:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-02-02 08:40:52,006 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:52,006 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 08:40:52,006 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1450783205, now seen corresponding path program 1 times [2018-02-02 08:40:52,006 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:52,006 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:52,007 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:52,007 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:52,007 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:52,017 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:52,055 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 08:40:52,056 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 08:40:52,056 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 08:40:52,056 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 08:40:52,056 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 08:40:52,056 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 08:40:52,057 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 4 states. [2018-02-02 08:40:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:52,077 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2018-02-02 08:40:52,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 08:40:52,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-02-02 08:40:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:52,078 INFO L225 Difference]: With dead ends: 72 [2018-02-02 08:40:52,078 INFO L226 Difference]: Without dead ends: 45 [2018-02-02 08:40:52,079 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 08:40:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-02-02 08:40:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-02-02 08:40:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-02-02 08:40:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2018-02-02 08:40:52,081 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 30 [2018-02-02 08:40:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:52,081 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2018-02-02 08:40:52,081 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 08:40:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2018-02-02 08:40:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-02-02 08:40:52,082 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 08:40:52,082 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 08:40:52,082 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr5RequiresViolation, mainErr3RequiresViolation, mainErr1RequiresViolation, mainErr7RequiresViolation, mainErr2RequiresViolation, mainErr4RequiresViolation, mainErr6RequiresViolation, mainErr0RequiresViolation, mainErr8EnsuresViolation]=== [2018-02-02 08:40:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash 262979632, now seen corresponding path program 2 times [2018-02-02 08:40:52,082 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 08:40:52,082 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 08:40:52,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:52,083 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 08:40:52,083 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 08:40:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 08:40:52,091 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 08:40:52,139 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 08:40:52,150 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 08:40:52,150 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 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 08:40:52,155 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 08:40:52,160 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-02-02 08:40:52,163 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-02-02 08:40:52,164 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 08:40:52,166 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 08:40:52,247 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 08:40:52,264 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 08:40:52,264 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-02-02 08:40:52,264 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-02 08:40:52,264 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-02 08:40:52,265 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-02-02 08:40:52,265 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 15 states. [2018-02-02 08:40:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 08:40:52,494 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2018-02-02 08:40:52,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-02 08:40:52,494 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2018-02-02 08:40:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 08:40:52,495 INFO L225 Difference]: With dead ends: 55 [2018-02-02 08:40:52,495 INFO L226 Difference]: Without dead ends: 0 [2018-02-02 08:40:52,495 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 08:40:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-02 08:40:52,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-02 08:40:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-02 08:40:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-02 08:40:52,496 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-02-02 08:40:52,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 08:40:52,496 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-02 08:40:52,496 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-02 08:40:52,496 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-02 08:40:52,496 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-02 08:40:52,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 08:40:52 BoogieIcfgContainer [2018-02-02 08:40:52,500 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 08:40:52,500 INFO L168 Benchmark]: Toolchain (without parser) took 3421.52 ms. Allocated memory was 402.1 MB in the beginning and 665.3 MB in the end (delta: 263.2 MB). Free memory was 360.3 MB in the beginning and 465.5 MB in the end (delta: -105.2 MB). Peak memory consumption was 158.0 MB. Max. memory is 5.3 GB. [2018-02-02 08:40:52,501 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 402.1 MB. Free memory is still 365.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 08:40:52,501 INFO L168 Benchmark]: CACSL2BoogieTranslator took 152.72 ms. Allocated memory is still 402.1 MB. Free memory was 359.0 MB in the beginning and 349.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 5.3 GB. [2018-02-02 08:40:52,501 INFO L168 Benchmark]: Boogie Preprocessor took 26.57 ms. Allocated memory is still 402.1 MB. Free memory was 349.8 MB in the beginning and 347.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 08:40:52,501 INFO L168 Benchmark]: RCFGBuilder took 212.72 ms. Allocated memory is still 402.1 MB. Free memory was 347.1 MB in the beginning and 329.1 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. [2018-02-02 08:40:52,502 INFO L168 Benchmark]: TraceAbstraction took 3026.39 ms. Allocated memory was 402.1 MB in the beginning and 665.3 MB in the end (delta: 263.2 MB). Free memory was 329.1 MB in the beginning and 465.5 MB in the end (delta: -136.4 MB). Peak memory consumption was 126.8 MB. Max. memory is 5.3 GB. [2018-02-02 08:40:52,503 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 402.1 MB. Free memory is still 365.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 152.72 ms. Allocated memory is still 402.1 MB. Free memory was 359.0 MB in the beginning and 349.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.57 ms. Allocated memory is still 402.1 MB. Free memory was 349.8 MB in the beginning and 347.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 212.72 ms. Allocated memory is still 402.1 MB. Free memory was 347.1 MB in the beginning and 329.1 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 3026.39 ms. Allocated memory was 402.1 MB in the beginning and 665.3 MB in the end (delta: 263.2 MB). Free memory was 329.1 MB in the beginning and 465.5 MB in the end (delta: -136.4 MB). Peak memory consumption was 126.8 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, 2.9s OverallTime, 11 OverallIterations, 3 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 313 SDtfs, 1362 SDslu, 754 SDs, 0 SdLazy, 715 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.2s 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_08-40-52-507.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_08-40-52-507.csv Received shutdown request...