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/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-read.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-47db877 [2018-01-23 14:36:51,649 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-23 14:36:51,675 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-23 14:36:51,691 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-23 14:36:51,691 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-23 14:36:51,692 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-23 14:36:51,693 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-23 14:36:51,694 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-23 14:36:51,696 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-23 14:36:51,697 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-23 14:36:51,698 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-23 14:36:51,698 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-23 14:36:51,699 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-23 14:36:51,700 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-23 14:36:51,701 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-23 14:36:51,704 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-23 14:36:51,706 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-23 14:36:51,708 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-23 14:36:51,709 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-23 14:36:51,710 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-23 14:36:51,713 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-23 14:36:51,713 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-23 14:36:51,713 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-23 14:36:51,714 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-23 14:36:51,715 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-23 14:36:51,716 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-23 14:36:51,716 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-23 14:36:51,717 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-23 14:36:51,717 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-23 14:36:51,718 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-23 14:36:51,718 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-23 14:36:51,718 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Camel+AI_EQ.epf [2018-01-23 14:36:51,727 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-23 14:36:51,727 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-23 14:36:51,728 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-23 14:36:51,728 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-23 14:36:51,728 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-23 14:36:51,728 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-23 14:36:51,729 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-23 14:36:51,729 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-23 14:36:51,729 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-23 14:36:51,729 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-23 14:36:51,729 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-23 14:36:51,729 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-23 14:36:51,730 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-23 14:36:51,730 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-23 14:36:51,730 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-23 14:36:51,730 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-23 14:36:51,730 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-23 14:36:51,730 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-23 14:36:51,730 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-23 14:36:51,730 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-23 14:36:51,731 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-23 14:36:51,731 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-23 14:36:51,731 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-23 14:36:51,731 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-23 14:36:51,731 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-23 14:36:51,732 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-23 14:36:51,732 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-23 14:36:51,732 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-23 14:36:51,732 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-23 14:36:51,732 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-23 14:36:51,732 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-23 14:36:51,732 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-01-23 14:36:51,733 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-23 14:36:51,733 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-23 14:36:51,733 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-23 14:36:51,733 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-23 14:36:51,734 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-23 14:36:51,766 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-23 14:36:51,775 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-23 14:36:51,779 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-23 14:36:51,780 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-23 14:36:51,780 INFO L276 PluginConnector]: CDTParser initialized [2018-01-23 14:36:51,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-read.c [2018-01-23 14:36:51,883 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-23 14:36:51,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-23 14:36:51,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-23 14:36:51,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-23 14:36:51,894 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-23 14:36:51,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:36:51" (1/1) ... [2018-01-23 14:36:51,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dd2c2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:51, skipping insertion in model container [2018-01-23 14:36:51,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 02:36:51" (1/1) ... [2018-01-23 14:36:51,911 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:36:51,926 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-23 14:36:52,036 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:36:52,053 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-23 14:36:52,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52 WrapperNode [2018-01-23 14:36:52,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-23 14:36:52,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-23 14:36:52,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-23 14:36:52,061 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-23 14:36:52,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52" (1/1) ... [2018-01-23 14:36:52,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52" (1/1) ... [2018-01-23 14:36:52,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52" (1/1) ... [2018-01-23 14:36:52,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52" (1/1) ... [2018-01-23 14:36:52,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52" (1/1) ... [2018-01-23 14:36:52,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52" (1/1) ... [2018-01-23 14:36:52,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52" (1/1) ... [2018-01-23 14:36:52,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-23 14:36:52,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-23 14:36:52,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-23 14:36:52,092 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-23 14:36:52,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52" (1/1) ... No working directory specified, using /storage/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 [2018-01-23 14:36:52,139 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-23 14:36:52,140 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-23 14:36:52,140 INFO L136 BoogieDeclarations]: Found implementation of procedure bar [2018-01-23 14:36:52,140 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-23 14:36:52,140 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-23 14:36:52,140 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-23 14:36:52,140 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-23 14:36:52,141 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-23 14:36:52,141 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-23 14:36:52,141 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-23 14:36:52,141 INFO L128 BoogieDeclarations]: Found specification of procedure bar [2018-01-23 14:36:52,141 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-23 14:36:52,141 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-23 14:36:52,142 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-23 14:36:52,142 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-23 14:36:52,335 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-23 14:36:52,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:36:52 BoogieIcfgContainer [2018-01-23 14:36:52,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-23 14:36:52,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-23 14:36:52,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-23 14:36:52,338 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-23 14:36:52,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 02:36:51" (1/3) ... [2018-01-23 14:36:52,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bbde70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:36:52, skipping insertion in model container [2018-01-23 14:36:52,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 02:36:52" (2/3) ... [2018-01-23 14:36:52,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bbde70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 02:36:52, skipping insertion in model container [2018-01-23 14:36:52,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 02:36:52" (3/3) ... [2018-01-23 14:36:52,341 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_false-valid-deref-read.c [2018-01-23 14:36:52,348 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-23 14:36:52,356 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-01-23 14:36:52,392 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:36:52,392 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:36:52,392 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:36:52,393 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:36:52,393 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:36:52,393 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:36:52,393 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:36:52,393 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == barErr0EnsuresViolation======== [2018-01-23 14:36:52,394 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:36:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-23 14:36:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-23 14:36:52,422 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:52,423 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:52,423 INFO L371 AbstractCegarLoop]: === Iteration 1 === [barErr0EnsuresViolation]=== [2018-01-23 14:36:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash -492377012, now seen corresponding path program 1 times [2018-01-23 14:36:52,431 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:52,431 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:52,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:52,480 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:52,480 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:52,537 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:36:52,582 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:36:52,582 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:36:52,584 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:36:52,598 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:36:52,598 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:36:52,600 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-23 14:36:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:52,626 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-23 14:36:52,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:36:52,627 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-23 14:36:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:52,633 INFO L225 Difference]: With dead ends: 114 [2018-01-23 14:36:52,633 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:36:52,637 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:36:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:36:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:36:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:36:52,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:36:52,660 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-01-23 14:36:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:52,660 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:36:52,660 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:36:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:36:52,660 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:36:52,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-23 14:36:52,769 INFO L404 ceAbstractionStarter]: At program point L13'''(lines 13 15) the Hoare annotation is: true [2018-01-23 14:36:52,769 INFO L401 ceAbstractionStarter]: For program point barErr0EnsuresViolation(lines 11 17) no Hoare annotation was computed. [2018-01-23 14:36:52,769 INFO L401 ceAbstractionStarter]: For program point L13''(lines 13 15) no Hoare annotation was computed. [2018-01-23 14:36:52,769 INFO L401 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-01-23 14:36:52,769 INFO L401 ceAbstractionStarter]: For program point L13(lines 13 15) no Hoare annotation was computed. [2018-01-23 14:36:52,769 INFO L404 ceAbstractionStarter]: At program point barENTRY(lines 11 17) the Hoare annotation is: true [2018-01-23 14:36:52,769 INFO L401 ceAbstractionStarter]: For program point L13''''(lines 13 15) no Hoare annotation was computed. [2018-01-23 14:36:52,769 INFO L401 ceAbstractionStarter]: For program point barFINAL(lines 11 17) no Hoare annotation was computed. [2018-01-23 14:36:52,770 INFO L401 ceAbstractionStarter]: For program point L14'(line 14) no Hoare annotation was computed. [2018-01-23 14:36:52,770 INFO L401 ceAbstractionStarter]: For program point barEXIT(lines 11 17) no Hoare annotation was computed. [2018-01-23 14:36:52,770 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-23 14:36:52,770 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-23 14:36:52,770 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 43) the Hoare annotation is: true [2018-01-23 14:36:52,770 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-23 14:36:52,771 INFO L401 ceAbstractionStarter]: For program point fooEXIT(lines 20 29) no Hoare annotation was computed. [2018-01-23 14:36:52,771 INFO L401 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-01-23 14:36:52,771 INFO L401 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-01-23 14:36:52,771 INFO L401 ceAbstractionStarter]: For program point L22(lines 22 24) no Hoare annotation was computed. [2018-01-23 14:36:52,771 INFO L401 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-01-23 14:36:52,771 INFO L401 ceAbstractionStarter]: For program point L23'(line 23) no Hoare annotation was computed. [2018-01-23 14:36:52,771 INFO L401 ceAbstractionStarter]: For program point L21'''''(line 21) no Hoare annotation was computed. [2018-01-23 14:36:52,772 INFO L401 ceAbstractionStarter]: For program point L25'(lines 25 27) no Hoare annotation was computed. [2018-01-23 14:36:52,772 INFO L401 ceAbstractionStarter]: For program point L21'''(line 21) no Hoare annotation was computed. [2018-01-23 14:36:52,772 INFO L401 ceAbstractionStarter]: For program point L21'(line 21) no Hoare annotation was computed. [2018-01-23 14:36:52,772 INFO L401 ceAbstractionStarter]: For program point fooFINAL(lines 20 29) no Hoare annotation was computed. [2018-01-23 14:36:52,772 INFO L404 ceAbstractionStarter]: At program point fooENTRY(lines 20 29) the Hoare annotation is: true [2018-01-23 14:36:52,772 INFO L401 ceAbstractionStarter]: For program point L22''(lines 22 24) no Hoare annotation was computed. [2018-01-23 14:36:52,772 INFO L401 ceAbstractionStarter]: For program point L23''(line 23) no Hoare annotation was computed. [2018-01-23 14:36:52,773 INFO L401 ceAbstractionStarter]: For program point L21''(line 21) no Hoare annotation was computed. [2018-01-23 14:36:52,773 INFO L404 ceAbstractionStarter]: At program point L22''''(lines 22 24) the Hoare annotation is: true [2018-01-23 14:36:52,773 INFO L404 ceAbstractionStarter]: At program point L22'''(lines 22 24) the Hoare annotation is: true [2018-01-23 14:36:52,773 INFO L401 ceAbstractionStarter]: For program point fooErr0EnsuresViolation(lines 20 29) no Hoare annotation was computed. [2018-01-23 14:36:52,773 INFO L401 ceAbstractionStarter]: For program point L21''''(line 21) no Hoare annotation was computed. [2018-01-23 14:36:52,773 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 43) the Hoare annotation is: true [2018-01-23 14:36:52,774 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-23 14:36:52,774 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 43) the Hoare annotation is: true [2018-01-23 14:36:52,774 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-23 14:36:52,774 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-23 14:36:52,774 INFO L404 ceAbstractionStarter]: At program point L36''(lines 36 40) the Hoare annotation is: true [2018-01-23 14:36:52,774 INFO L401 ceAbstractionStarter]: For program point L33''(lines 33 35) no Hoare annotation was computed. [2018-01-23 14:36:52,774 INFO L401 ceAbstractionStarter]: For program point L34''(line 34) no Hoare annotation was computed. [2018-01-23 14:36:52,775 INFO L404 ceAbstractionStarter]: At program point L33'''(lines 33 35) the Hoare annotation is: true [2018-01-23 14:36:52,775 INFO L401 ceAbstractionStarter]: For program point L32''(line 32) no Hoare annotation was computed. [2018-01-23 14:36:52,775 INFO L401 ceAbstractionStarter]: For program point L37'(line 37) no Hoare annotation was computed. [2018-01-23 14:36:52,775 INFO L401 ceAbstractionStarter]: For program point L32''''(line 32) no Hoare annotation was computed. [2018-01-23 14:36:52,775 INFO L401 ceAbstractionStarter]: For program point L32'''''(line 32) no Hoare annotation was computed. [2018-01-23 14:36:52,775 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 31 42) no Hoare annotation was computed. [2018-01-23 14:36:52,775 INFO L401 ceAbstractionStarter]: For program point L36'''(lines 36 40) no Hoare annotation was computed. [2018-01-23 14:36:52,776 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 31 42) no Hoare annotation was computed. [2018-01-23 14:36:52,776 INFO L401 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-01-23 14:36:52,776 INFO L401 ceAbstractionStarter]: For program point L32'''(line 32) no Hoare annotation was computed. [2018-01-23 14:36:52,776 INFO L404 ceAbstractionStarter]: At program point L34(line 34) the Hoare annotation is: true [2018-01-23 14:36:52,776 INFO L401 ceAbstractionStarter]: For program point L33(lines 33 35) no Hoare annotation was computed. [2018-01-23 14:36:52,776 INFO L401 ceAbstractionStarter]: For program point L34'''(line 34) no Hoare annotation was computed. [2018-01-23 14:36:52,776 INFO L401 ceAbstractionStarter]: For program point L33''''(lines 33 35) no Hoare annotation was computed. [2018-01-23 14:36:52,777 INFO L401 ceAbstractionStarter]: For program point L36(lines 36 40) no Hoare annotation was computed. [2018-01-23 14:36:52,777 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 31 42) no Hoare annotation was computed. [2018-01-23 14:36:52,777 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 31 42) the Hoare annotation is: true [2018-01-23 14:36:52,777 INFO L401 ceAbstractionStarter]: For program point L38(line 38) no Hoare annotation was computed. [2018-01-23 14:36:52,777 INFO L401 ceAbstractionStarter]: For program point L37(line 37) no Hoare annotation was computed. [2018-01-23 14:36:52,777 INFO L401 ceAbstractionStarter]: For program point L34'(line 34) no Hoare annotation was computed. [2018-01-23 14:36:52,777 INFO L401 ceAbstractionStarter]: For program point L32'(line 32) no Hoare annotation was computed. [2018-01-23 14:36:52,781 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:36:52,781 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:36:52,782 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:36:52,782 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:36:52,782 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:36:52,782 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:36:52,782 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:36:52,782 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-23 14:36:52,782 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:36:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-23 14:36:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-23 14:36:52,785 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:52,785 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-23 14:36:52,785 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-23 14:36:52,786 INFO L82 PathProgramCache]: Analyzing trace with hash 136143, now seen corresponding path program 1 times [2018-01-23 14:36:52,786 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:52,786 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:52,787 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:52,787 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:52,788 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:36:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-23 14:36:52,817 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-23 14:36:52,822 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-23 14:36:52,825 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:36:52,826 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:36:52,826 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:36:52,826 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:36:52,826 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:36:52,826 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:36:52,826 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:36:52,826 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-23 14:36:52,826 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:36:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-23 14:36:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-23 14:36:52,830 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:52,830 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:52,830 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-23 14:36:52,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1220349549, now seen corresponding path program 1 times [2018-01-23 14:36:52,830 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:52,830 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:52,831 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:52,831 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:52,831 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:52,847 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:36:52,867 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:36:52,868 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:36:52,868 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:36:52,868 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:36:52,868 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:36:52,869 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-23 14:36:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:52,877 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-23 14:36:52,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:36:52,878 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-23 14:36:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:52,880 INFO L225 Difference]: With dead ends: 114 [2018-01-23 14:36:52,880 INFO L226 Difference]: Without dead ends: 43 [2018-01-23 14:36:52,881 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:36:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-23 14:36:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-23 14:36:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-23 14:36:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-23 14:36:52,895 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2018-01-23 14:36:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:52,895 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-23 14:36:52,896 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:36:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-23 14:36:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-23 14:36:52,897 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:52,897 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:52,897 INFO L371 AbstractCegarLoop]: === Iteration 2 === [fooErr0EnsuresViolation]=== [2018-01-23 14:36:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 390316661, now seen corresponding path program 1 times [2018-01-23 14:36:52,898 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:52,898 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:52,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:52,899 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:52,899 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:52,926 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:36:53,047 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:36:53,047 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-23 14:36:53,049 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-23 14:36:53,049 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-23 14:36:53,049 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-23 14:36:53,049 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 7 states. [2018-01-23 14:36:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:53,196 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2018-01-23 14:36:53,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-23 14:36:53,196 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-01-23 14:36:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:53,199 INFO L225 Difference]: With dead ends: 112 [2018-01-23 14:36:53,199 INFO L226 Difference]: Without dead ends: 77 [2018-01-23 14:36:53,200 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:36:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-23 14:36:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2018-01-23 14:36:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-23 14:36:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-01-23 14:36:53,216 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 28 [2018-01-23 14:36:53,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:53,216 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-01-23 14:36:53,216 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-23 14:36:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-01-23 14:36:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-23 14:36:53,218 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:53,218 INFO L322 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2018-01-23 14:36:53,218 INFO L371 AbstractCegarLoop]: === Iteration 3 === [fooErr0EnsuresViolation]=== [2018-01-23 14:36:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2078164222, now seen corresponding path program 1 times [2018-01-23 14:36:53,218 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:53,218 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:53,219 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:53,219 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:53,219 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:53,240 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-23 14:36:53,307 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:36:53,307 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:36:53,307 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-23 14:36:53,307 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-23 14:36:53,308 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-23 14:36:53,308 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 4 states. [2018-01-23 14:36:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:53,431 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2018-01-23 14:36:53,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-23 14:36:53,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-01-23 14:36:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:53,432 INFO L225 Difference]: With dead ends: 69 [2018-01-23 14:36:53,433 INFO L226 Difference]: Without dead ends: 0 [2018-01-23 14:36:53,433 INFO L525 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 [2018-01-23 14:36:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-23 14:36:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-23 14:36:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-23 14:36:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-23 14:36:53,434 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-01-23 14:36:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:53,435 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-23 14:36:53,435 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-23 14:36:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-23 14:36:53,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-23 14:36:53,437 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-23 14:36:53,437 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-23 14:36:53,437 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-23 14:36:53,437 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-23 14:36:53,437 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-23 14:36:53,437 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-23 14:36:53,438 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-23 14:36:53,438 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-23 14:36:53,438 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-23 14:36:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-23 14:36:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-23 14:36:53,441 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:53,441 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:53,441 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash -851979775, now seen corresponding path program 1 times [2018-01-23 14:36:53,441 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:53,441 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:53,442 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:53,442 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:53,442 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:53,448 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:36:53,455 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:36:53,455 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-23 14:36:53,455 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-23 14:36:53,456 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-23 14:36:53,456 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:36:53,456 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-23 14:36:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:53,461 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-23 14:36:53,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-23 14:36:53,462 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-23 14:36:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:53,463 INFO L225 Difference]: With dead ends: 114 [2018-01-23 14:36:53,463 INFO L226 Difference]: Without dead ends: 57 [2018-01-23 14:36:53,464 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-23 14:36:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-23 14:36:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-23 14:36:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-23 14:36:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-23 14:36:53,470 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 17 [2018-01-23 14:36:53,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:53,471 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-23 14:36:53,471 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-23 14:36:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-23 14:36:53,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-23 14:36:53,472 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:53,472 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:53,472 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:53,472 INFO L82 PathProgramCache]: Analyzing trace with hash -178858898, now seen corresponding path program 1 times [2018-01-23 14:36:53,473 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:53,473 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:53,474 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:53,474 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:53,474 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:53,480 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:36:53,503 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-23 14:36:53,503 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-23 14:36:53,503 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-23 14:36:53,503 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-23 14:36:53,503 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:36:53,503 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 3 states. [2018-01-23 14:36:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:53,518 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2018-01-23 14:36:53,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-23 14:36:53,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-23 14:36:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:53,520 INFO L225 Difference]: With dead ends: 76 [2018-01-23 14:36:53,520 INFO L226 Difference]: Without dead ends: 61 [2018-01-23 14:36:53,520 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-23 14:36:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-23 14:36:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2018-01-23 14:36:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-23 14:36:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-23 14:36:53,525 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 19 [2018-01-23 14:36:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:53,525 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-23 14:36:53,525 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-23 14:36:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-23 14:36:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-23 14:36:53,526 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:53,527 INFO L322 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:53,527 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:53,527 INFO L82 PathProgramCache]: Analyzing trace with hash -853032378, now seen corresponding path program 1 times [2018-01-23 14:36:53,527 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:53,527 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:53,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:53,528 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:53,528 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:53,544 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:36:53,580 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:36:53,581 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-23 14:36:53,589 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:53,623 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:36:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-23 14:36:53,742 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-23 14:36:53,743 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2018-01-23 14:36:53,743 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-23 14:36:53,743 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-23 14:36:53,743 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-01-23 14:36:53,744 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 9 states. [2018-01-23 14:36:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:53,981 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2018-01-23 14:36:53,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-23 14:36:53,981 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2018-01-23 14:36:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:53,982 INFO L225 Difference]: With dead ends: 130 [2018-01-23 14:36:53,982 INFO L226 Difference]: Without dead ends: 73 [2018-01-23 14:36:53,983 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-01-23 14:36:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-01-23 14:36:53,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2018-01-23 14:36:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-01-23 14:36:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-01-23 14:36:53,988 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 46 [2018-01-23 14:36:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:53,989 INFO L432 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-01-23 14:36:53,989 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-23 14:36:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-01-23 14:36:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-01-23 14:36:53,991 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:53,991 INFO L322 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:53,991 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash 988850019, now seen corresponding path program 1 times [2018-01-23 14:36:53,992 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:53,992 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:53,993 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:53,993 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:53,993 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:54,023 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-01-23 14:36:54,100 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:36:54,101 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-23 14:36:54,108 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:54,152 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:36:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-01-23 14:36:54,220 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-01-23 14:36:54,220 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2018-01-23 14:36:54,220 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-23 14:36:54,221 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-23 14:36:54,221 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-01-23 14:36:54,221 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 10 states. [2018-01-23 14:36:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:54,510 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2018-01-23 14:36:54,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-23 14:36:54,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2018-01-23 14:36:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:54,512 INFO L225 Difference]: With dead ends: 164 [2018-01-23 14:36:54,512 INFO L226 Difference]: Without dead ends: 116 [2018-01-23 14:36:54,512 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:36:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-01-23 14:36:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 92. [2018-01-23 14:36:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-01-23 14:36:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2018-01-23 14:36:54,522 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 81 [2018-01-23 14:36:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:54,523 INFO L432 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2018-01-23 14:36:54,523 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-23 14:36:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2018-01-23 14:36:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-01-23 14:36:54,524 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:54,525 INFO L322 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:54,525 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2122420121, now seen corresponding path program 1 times [2018-01-23 14:36:54,525 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:54,525 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:54,526 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:54,526 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:54,526 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:54,563 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-01-23 14:36:54,675 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:36:54,675 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-23 14:36:54,687 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:54,744 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:36:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-01-23 14:36:54,923 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:36:54,923 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2018-01-23 14:36:54,924 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-23 14:36:54,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-23 14:36:54,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-01-23 14:36:54,924 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 13 states. [2018-01-23 14:36:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:55,098 INFO L93 Difference]: Finished difference Result 197 states and 223 transitions. [2018-01-23 14:36:55,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-23 14:36:55,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-01-23 14:36:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:55,099 INFO L225 Difference]: With dead ends: 197 [2018-01-23 14:36:55,100 INFO L226 Difference]: Without dead ends: 115 [2018-01-23 14:36:55,100 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:36:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-01-23 14:36:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2018-01-23 14:36:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-01-23 14:36:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2018-01-23 14:36:55,111 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 123 [2018-01-23 14:36:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:55,112 INFO L432 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2018-01-23 14:36:55,112 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-23 14:36:55,112 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2018-01-23 14:36:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-01-23 14:36:55,114 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:55,114 INFO L322 BasicCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:55,114 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1863963162, now seen corresponding path program 2 times [2018-01-23 14:36:55,114 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:55,114 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:55,115 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:55,115 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:36:55,115 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:55,156 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2018-01-23 14:36:55,345 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:36:55,345 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-23 14:36:55,352 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:36:55,380 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:36:55,415 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:36:55,422 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:36:55,430 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:36:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-01-23 14:36:55,594 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:36:55,594 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2018-01-23 14:36:55,595 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:36:55,595 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:36:55,595 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:36:55,595 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 14 states. [2018-01-23 14:36:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:55,839 INFO L93 Difference]: Finished difference Result 262 states and 297 transitions. [2018-01-23 14:36:55,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-01-23 14:36:55,840 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 174 [2018-01-23 14:36:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:55,842 INFO L225 Difference]: With dead ends: 262 [2018-01-23 14:36:55,842 INFO L226 Difference]: Without dead ends: 198 [2018-01-23 14:36:55,842 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:36:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-01-23 14:36:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 140. [2018-01-23 14:36:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-01-23 14:36:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2018-01-23 14:36:55,858 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 174 [2018-01-23 14:36:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:55,859 INFO L432 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2018-01-23 14:36:55,859 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:36:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2018-01-23 14:36:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-01-23 14:36:55,861 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:55,861 INFO L322 BasicCegarLoop]: trace histogram [14, 12, 9, 9, 9, 9, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:55,861 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:55,862 INFO L82 PathProgramCache]: Analyzing trace with hash 277544375, now seen corresponding path program 3 times [2018-01-23 14:36:55,862 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:55,862 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:55,863 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:55,863 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:36:55,863 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:55,900 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2018-01-23 14:36:56,116 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:36:56,116 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-23 14:36:56,121 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:36:56,142 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:36:56,148 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:36:56,157 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:36:56,173 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:36:56,174 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:36:56,182 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:36:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 276 proven. 9 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2018-01-23 14:36:56,277 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:36:56,277 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2018-01-23 14:36:56,278 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-23 14:36:56,278 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-23 14:36:56,278 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-01-23 14:36:56,278 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand 14 states. [2018-01-23 14:36:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:56,544 INFO L93 Difference]: Finished difference Result 231 states and 267 transitions. [2018-01-23 14:36:56,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-01-23 14:36:56,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 233 [2018-01-23 14:36:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:56,547 INFO L225 Difference]: With dead ends: 231 [2018-01-23 14:36:56,547 INFO L226 Difference]: Without dead ends: 210 [2018-01-23 14:36:56,547 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-01-23 14:36:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-01-23 14:36:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 163. [2018-01-23 14:36:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-01-23 14:36:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 184 transitions. [2018-01-23 14:36:56,563 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 184 transitions. Word has length 233 [2018-01-23 14:36:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:56,564 INFO L432 AbstractCegarLoop]: Abstraction has 163 states and 184 transitions. [2018-01-23 14:36:56,564 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-23 14:36:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 184 transitions. [2018-01-23 14:36:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-01-23 14:36:56,567 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:56,567 INFO L322 BasicCegarLoop]: trace histogram [21, 15, 15, 15, 15, 15, 9, 9, 9, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:56,567 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash 948218378, now seen corresponding path program 4 times [2018-01-23 14:36:56,567 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:56,567 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:56,568 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:56,568 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:36:56,568 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:56,608 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2018-01-23 14:36:56,910 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:36:56,921 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-01-23 14:36:56,927 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:36:57,002 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:36:57,011 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:36:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 855 proven. 10 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-01-23 14:36:57,136 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:36:57,136 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2018-01-23 14:36:57,136 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-23 14:36:57,137 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-23 14:36:57,137 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-01-23 14:36:57,137 INFO L87 Difference]: Start difference. First operand 163 states and 184 transitions. Second operand 18 states. [2018-01-23 14:36:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:57,424 INFO L93 Difference]: Finished difference Result 544 states and 672 transitions. [2018-01-23 14:36:57,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-23 14:36:57,425 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 300 [2018-01-23 14:36:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:57,430 INFO L225 Difference]: With dead ends: 544 [2018-01-23 14:36:57,430 INFO L226 Difference]: Without dead ends: 437 [2018-01-23 14:36:57,432 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:36:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2018-01-23 14:36:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 202. [2018-01-23 14:36:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-01-23 14:36:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 228 transitions. [2018-01-23 14:36:57,462 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 228 transitions. Word has length 300 [2018-01-23 14:36:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:57,463 INFO L432 AbstractCegarLoop]: Abstraction has 202 states and 228 transitions. [2018-01-23 14:36:57,463 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-23 14:36:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 228 transitions. [2018-01-23 14:36:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-01-23 14:36:57,470 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:57,470 INFO L322 BasicCegarLoop]: trace histogram [24, 22, 17, 17, 17, 17, 15, 15, 15, 15, 15, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:57,470 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:57,471 INFO L82 PathProgramCache]: Analyzing trace with hash -608215033, now seen corresponding path program 5 times [2018-01-23 14:36:57,471 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:57,471 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:57,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:57,472 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:36:57,472 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:57,529 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 2136 trivial. 0 not checked. [2018-01-23 14:36:57,911 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:36:57,911 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:36:57,922 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:36:57,957 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:36:57,965 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:36:57,971 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:36:57,984 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:36:58,044 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:36:58,046 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:36:58,055 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:36:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 1114 proven. 40 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2018-01-23 14:36:58,245 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:36:58,246 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2018-01-23 14:36:58,246 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-23 14:36:58,246 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-23 14:36:58,246 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:36:58,247 INFO L87 Difference]: Start difference. First operand 202 states and 228 transitions. Second operand 21 states. [2018-01-23 14:36:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:36:58,773 INFO L93 Difference]: Finished difference Result 433 states and 493 transitions. [2018-01-23 14:36:58,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:36:58,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 371 [2018-01-23 14:36:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:36:58,775 INFO L225 Difference]: With dead ends: 433 [2018-01-23 14:36:58,776 INFO L226 Difference]: Without dead ends: 229 [2018-01-23 14:36:58,777 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:36:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-01-23 14:36:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2018-01-23 14:36:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-01-23 14:36:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 230 transitions. [2018-01-23 14:36:58,789 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 230 transitions. Word has length 371 [2018-01-23 14:36:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:36:58,789 INFO L432 AbstractCegarLoop]: Abstraction has 210 states and 230 transitions. [2018-01-23 14:36:58,790 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-23 14:36:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 230 transitions. [2018-01-23 14:36:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-01-23 14:36:58,792 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:36:58,792 INFO L322 BasicCegarLoop]: trace histogram [29, 26, 21, 21, 21, 21, 18, 18, 18, 18, 18, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:36:58,793 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:36:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash -484836342, now seen corresponding path program 6 times [2018-01-23 14:36:58,793 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:36:58,793 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:36:58,794 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:58,794 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:36:58,794 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:36:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:36:58,834 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:36:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3308 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 3096 trivial. 0 not checked. [2018-01-23 14:36:59,197 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:36:59,197 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:36:59,203 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:36:59,233 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:36:59,244 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:36:59,251 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:36:59,259 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:36:59,267 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:36:59,286 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:36:59,317 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:36:59,410 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:36:59,593 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:36:59,596 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:36:59,607 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:36:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3308 backedges. 860 proven. 21 refuted. 0 times theorem prover too weak. 2427 trivial. 0 not checked. [2018-01-23 14:36:59,805 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:36:59,805 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2018-01-23 14:36:59,806 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-23 14:36:59,806 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-23 14:36:59,806 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2018-01-23 14:36:59,806 INFO L87 Difference]: Start difference. First operand 210 states and 230 transitions. Second operand 21 states. [2018-01-23 14:37:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:00,417 INFO L93 Difference]: Finished difference Result 381 states and 444 transitions. [2018-01-23 14:37:00,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-01-23 14:37:00,418 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 434 [2018-01-23 14:37:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:00,420 INFO L225 Difference]: With dead ends: 381 [2018-01-23 14:37:00,420 INFO L226 Difference]: Without dead ends: 360 [2018-01-23 14:37:00,421 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:37:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2018-01-23 14:37:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 233. [2018-01-23 14:37:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-01-23 14:37:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 261 transitions. [2018-01-23 14:37:00,441 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 261 transitions. Word has length 434 [2018-01-23 14:37:00,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:00,442 INFO L432 AbstractCegarLoop]: Abstraction has 233 states and 261 transitions. [2018-01-23 14:37:00,442 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-23 14:37:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 261 transitions. [2018-01-23 14:37:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-01-23 14:37:00,445 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:00,446 INFO L322 BasicCegarLoop]: trace histogram [39, 30, 30, 30, 30, 30, 21, 21, 21, 21, 21, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:00,446 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash -55725442, now seen corresponding path program 7 times [2018-01-23 14:37:00,446 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:00,446 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:00,447 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:00,447 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:00,447 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:00,497 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5271 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 5001 trivial. 0 not checked. [2018-01-23 14:37:00,961 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:00,961 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:00,968 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:01,102 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5271 backedges. 2984 proven. 24 refuted. 0 times theorem prover too weak. 2263 trivial. 0 not checked. [2018-01-23 14:37:01,371 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:01,371 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2018-01-23 14:37:01,372 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-01-23 14:37:01,372 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-01-23 14:37:01,372 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2018-01-23 14:37:01,372 INFO L87 Difference]: Start difference. First operand 233 states and 261 transitions. Second operand 23 states. [2018-01-23 14:37:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:01,964 INFO L93 Difference]: Finished difference Result 751 states and 940 transitions. [2018-01-23 14:37:01,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:37:01,964 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 522 [2018-01-23 14:37:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:01,970 INFO L225 Difference]: With dead ends: 751 [2018-01-23 14:37:01,970 INFO L226 Difference]: Without dead ends: 616 [2018-01-23 14:37:01,973 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2018-01-23 14:37:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2018-01-23 14:37:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 278. [2018-01-23 14:37:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-01-23 14:37:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 311 transitions. [2018-01-23 14:37:02,009 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 311 transitions. Word has length 522 [2018-01-23 14:37:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:02,010 INFO L432 AbstractCegarLoop]: Abstraction has 278 states and 311 transitions. [2018-01-23 14:37:02,010 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-01-23 14:37:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 311 transitions. [2018-01-23 14:37:02,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2018-01-23 14:37:02,015 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:02,016 INFO L322 BasicCegarLoop]: trace histogram [43, 40, 33, 33, 33, 33, 30, 30, 30, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:02,016 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:02,016 INFO L82 PathProgramCache]: Analyzing trace with hash 572109690, now seen corresponding path program 8 times [2018-01-23 14:37:02,016 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:02,017 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:02,017 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:02,017 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:02,018 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:02,096 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7655 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2018-01-23 14:37:02,672 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:02,672 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:02,677 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-23 14:37:02,730 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:02,841 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:02,866 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:02,877 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7655 backedges. 3380 proven. 21 refuted. 0 times theorem prover too weak. 4254 trivial. 0 not checked. [2018-01-23 14:37:03,180 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:03,181 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-01-23 14:37:03,181 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:37:03,182 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:37:03,182 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:37:03,182 INFO L87 Difference]: Start difference. First operand 278 states and 311 transitions. Second operand 24 states. [2018-01-23 14:37:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:04,413 INFO L93 Difference]: Finished difference Result 470 states and 532 transitions. [2018-01-23 14:37:04,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-23 14:37:04,414 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 616 [2018-01-23 14:37:04,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:04,416 INFO L225 Difference]: With dead ends: 470 [2018-01-23 14:37:04,416 INFO L226 Difference]: Without dead ends: 304 [2018-01-23 14:37:04,418 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2018-01-23 14:37:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-01-23 14:37:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 277. [2018-01-23 14:37:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-01-23 14:37:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 303 transitions. [2018-01-23 14:37:04,436 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 303 transitions. Word has length 616 [2018-01-23 14:37:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:04,437 INFO L432 AbstractCegarLoop]: Abstraction has 277 states and 303 transitions. [2018-01-23 14:37:04,437 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:37:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 303 transitions. [2018-01-23 14:37:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2018-01-23 14:37:04,440 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:04,441 INFO L322 BasicCegarLoop]: trace histogram [49, 45, 38, 38, 38, 38, 34, 34, 34, 34, 34, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:04,441 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:04,441 INFO L82 PathProgramCache]: Analyzing trace with hash 193770246, now seen corresponding path program 9 times [2018-01-23 14:37:04,441 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:04,441 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:04,442 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:04,442 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:04,442 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:04,498 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9862 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 9455 trivial. 0 not checked. [2018-01-23 14:37:05,234 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:05,235 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:05,240 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-23 14:37:05,299 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:05,307 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:05,318 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:05,335 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:05,361 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:05,431 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-23 14:37:05,435 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:05,449 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9862 backedges. 1930 proven. 38 refuted. 0 times theorem prover too weak. 7894 trivial. 0 not checked. [2018-01-23 14:37:05,935 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:05,935 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-01-23 14:37:05,937 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-01-23 14:37:05,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-01-23 14:37:05,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2018-01-23 14:37:05,937 INFO L87 Difference]: Start difference. First operand 277 states and 303 transitions. Second operand 24 states. [2018-01-23 14:37:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:06,603 INFO L93 Difference]: Finished difference Result 579 states and 681 transitions. [2018-01-23 14:37:06,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-01-23 14:37:06,603 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 690 [2018-01-23 14:37:06,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:06,608 INFO L225 Difference]: With dead ends: 579 [2018-01-23 14:37:06,608 INFO L226 Difference]: Without dead ends: 558 [2018-01-23 14:37:06,609 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 683 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2018-01-23 14:37:06,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2018-01-23 14:37:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 331. [2018-01-23 14:37:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-01-23 14:37:06,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 372 transitions. [2018-01-23 14:37:06,635 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 372 transitions. Word has length 690 [2018-01-23 14:37:06,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:06,636 INFO L432 AbstractCegarLoop]: Abstraction has 331 states and 372 transitions. [2018-01-23 14:37:06,636 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-01-23 14:37:06,636 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 372 transitions. [2018-01-23 14:37:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 800 [2018-01-23 14:37:06,640 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:06,640 INFO L322 BasicCegarLoop]: trace histogram [62, 50, 50, 50, 50, 50, 38, 38, 38, 38, 38, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:06,640 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash -301964325, now seen corresponding path program 10 times [2018-01-23 14:37:06,641 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:06,641 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:06,641 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:06,641 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:06,642 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:06,698 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14129 backedges. 0 proven. 486 refuted. 0 times theorem prover too weak. 13643 trivial. 0 not checked. [2018-01-23 14:37:07,827 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:07,827 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:07,833 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-23 14:37:08,008 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:08,024 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14129 backedges. 7420 proven. 44 refuted. 0 times theorem prover too weak. 6665 trivial. 0 not checked. [2018-01-23 14:37:08,621 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:08,621 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-01-23 14:37:08,622 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-23 14:37:08,622 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-23 14:37:08,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2018-01-23 14:37:08,623 INFO L87 Difference]: Start difference. First operand 331 states and 372 transitions. Second operand 28 states. [2018-01-23 14:37:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:09,305 INFO L93 Difference]: Finished difference Result 1074 states and 1370 transitions. [2018-01-23 14:37:09,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-01-23 14:37:09,305 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 799 [2018-01-23 14:37:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:09,310 INFO L225 Difference]: With dead ends: 1074 [2018-01-23 14:37:09,310 INFO L226 Difference]: Without dead ends: 911 [2018-01-23 14:37:09,312 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=1662, Unknown=0, NotChecked=0, Total=2070 [2018-01-23 14:37:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2018-01-23 14:37:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 382. [2018-01-23 14:37:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2018-01-23 14:37:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 428 transitions. [2018-01-23 14:37:09,346 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 428 transitions. Word has length 799 [2018-01-23 14:37:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:09,347 INFO L432 AbstractCegarLoop]: Abstraction has 382 states and 428 transitions. [2018-01-23 14:37:09,347 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-23 14:37:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 428 transitions. [2018-01-23 14:37:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 917 [2018-01-23 14:37:09,354 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:09,355 INFO L322 BasicCegarLoop]: trace histogram [67, 63, 54, 54, 54, 54, 50, 50, 50, 50, 50, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:09,355 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:09,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1616388090, now seen corresponding path program 11 times [2018-01-23 14:37:09,355 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:09,355 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:09,356 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:09,356 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:09,356 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:09,418 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19185 backedges. 0 proven. 572 refuted. 0 times theorem prover too weak. 18613 trivial. 0 not checked. [2018-01-23 14:37:10,630 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:10,630 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:10,636 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-23 14:37:10,689 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:10,706 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:10,719 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:10,761 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:10,817 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:10,934 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:11,072 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:11,200 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:11,527 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:12,097 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:13,072 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:15,929 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-23 14:37:15,935 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:15,961 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 19185 backedges. 7901 proven. 151 refuted. 0 times theorem prover too weak. 11133 trivial. 0 not checked. [2018-01-23 14:37:16,528 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:16,528 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2018-01-23 14:37:16,529 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-01-23 14:37:16,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-01-23 14:37:16,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2018-01-23 14:37:16,530 INFO L87 Difference]: Start difference. First operand 382 states and 428 transitions. Second operand 31 states. [2018-01-23 14:37:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:17,292 INFO L93 Difference]: Finished difference Result 613 states and 694 transitions. [2018-01-23 14:37:17,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-01-23 14:37:17,293 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 916 [2018-01-23 14:37:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:17,295 INFO L225 Difference]: With dead ends: 613 [2018-01-23 14:37:17,295 INFO L226 Difference]: Without dead ends: 419 [2018-01-23 14:37:17,297 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=2615, Unknown=0, NotChecked=0, Total=3080 [2018-01-23 14:37:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-01-23 14:37:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 373. [2018-01-23 14:37:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2018-01-23 14:37:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 408 transitions. [2018-01-23 14:37:17,343 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 408 transitions. Word has length 916 [2018-01-23 14:37:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:17,344 INFO L432 AbstractCegarLoop]: Abstraction has 373 states and 408 transitions. [2018-01-23 14:37:17,344 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-01-23 14:37:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 408 transitions. [2018-01-23 14:37:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1002 [2018-01-23 14:37:17,354 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:17,355 INFO L322 BasicCegarLoop]: trace histogram [74, 69, 60, 60, 60, 60, 55, 55, 55, 55, 55, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:17,355 INFO L371 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:17,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1017430117, now seen corresponding path program 12 times [2018-01-23 14:37:17,356 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:17,356 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:17,357 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:17,357 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:17,357 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:17,457 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 23283 backedges. 0 proven. 665 refuted. 0 times theorem prover too weak. 22618 trivial. 0 not checked. [2018-01-23 14:37:18,834 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:18,834 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:18,846 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-23 14:37:18,915 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:18,919 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:18,925 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:18,933 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:18,943 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:18,982 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:19,179 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:19,660 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:20,607 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:22,342 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:25,887 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:30,636 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:35,274 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-23 14:37:35,283 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-23 14:37:35,305 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 23283 backedges. 3616 proven. 70 refuted. 0 times theorem prover too weak. 19597 trivial. 0 not checked. [2018-01-23 14:37:35,829 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:35,829 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2018-01-23 14:37:35,830 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-01-23 14:37:35,830 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-01-23 14:37:35,830 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2018-01-23 14:37:35,830 INFO L87 Difference]: Start difference. First operand 373 states and 408 transitions. Second operand 29 states. [2018-01-23 14:37:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:36,292 INFO L93 Difference]: Finished difference Result 845 states and 994 transitions. [2018-01-23 14:37:36,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-23 14:37:36,292 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 1001 [2018-01-23 14:37:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:36,297 INFO L225 Difference]: With dead ends: 845 [2018-01-23 14:37:36,297 INFO L226 Difference]: Without dead ends: 833 [2018-01-23 14:37:36,298 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 996 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2018-01-23 14:37:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2018-01-23 14:37:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 430. [2018-01-23 14:37:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2018-01-23 14:37:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 479 transitions. [2018-01-23 14:37:36,358 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 479 transitions. Word has length 1001 [2018-01-23 14:37:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:36,359 INFO L432 AbstractCegarLoop]: Abstraction has 430 states and 479 transitions. [2018-01-23 14:37:36,359 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-01-23 14:37:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 479 transitions. [2018-01-23 14:37:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1136 [2018-01-23 14:37:36,372 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:36,373 INFO L322 BasicCegarLoop]: trace histogram [84, 80, 69, 69, 69, 69, 69, 65, 65, 65, 65, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:36,373 INFO L371 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1543276415, now seen corresponding path program 13 times [2018-01-23 14:37:36,373 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:36,374 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:36,374 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:36,374 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-23 14:37:36,375 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:36,485 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-23 14:37:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 31151 backedges. 0 proven. 765 refuted. 0 times theorem prover too weak. 30386 trivial. 0 not checked. [2018-01-23 14:37:38,391 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-23 14:37:38,391 INFO L209 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-23 14:37:38,396 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:38,618 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-23 14:37:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 31151 backedges. 13514 proven. 60 refuted. 0 times theorem prover too weak. 17577 trivial. 0 not checked. [2018-01-23 14:37:39,628 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-01-23 14:37:39,628 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2018-01-23 14:37:39,629 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-01-23 14:37:39,629 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-01-23 14:37:39,630 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2018-01-23 14:37:39,630 INFO L87 Difference]: Start difference. First operand 430 states and 479 transitions. Second operand 33 states. [2018-01-23 14:37:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-23 14:37:40,362 INFO L93 Difference]: Finished difference Result 1136 states and 1463 transitions. [2018-01-23 14:37:40,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-01-23 14:37:40,390 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 1135 [2018-01-23 14:37:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-23 14:37:40,394 INFO L225 Difference]: With dead ends: 1136 [2018-01-23 14:37:40,394 INFO L226 Difference]: Without dead ends: 919 [2018-01-23 14:37:40,397 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 1122 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=543, Invalid=2319, Unknown=0, NotChecked=0, Total=2862 [2018-01-23 14:37:40,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2018-01-23 14:37:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 445. [2018-01-23 14:37:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2018-01-23 14:37:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 495 transitions. [2018-01-23 14:37:40,445 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 495 transitions. Word has length 1135 [2018-01-23 14:37:40,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-23 14:37:40,445 INFO L432 AbstractCegarLoop]: Abstraction has 445 states and 495 transitions. [2018-01-23 14:37:40,445 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-01-23 14:37:40,446 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 495 transitions. [2018-01-23 14:37:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1271 [2018-01-23 14:37:40,455 INFO L314 BasicCegarLoop]: Found error trace [2018-01-23 14:37:40,456 INFO L322 BasicCegarLoop]: trace histogram [97, 90, 81, 81, 81, 81, 74, 74, 74, 74, 74, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-23 14:37:40,456 INFO L371 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-23 14:37:40,456 INFO L82 PathProgramCache]: Analyzing trace with hash 457584194, now seen corresponding path program 14 times [2018-01-23 14:37:40,456 INFO L209 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-01-23 14:37:40,456 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-01-23 14:37:40,457 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:40,457 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-23 14:37:40,457 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-23 14:37:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-23 14:37:40,539 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-01-23 14:37:41,558 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:264) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:262) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:131) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:200) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:915) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:279) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackTraceAbstractionRefinementStrategy.getTraceCheck(MultiTrackTraceAbstractionRefinementStrategy.java:218) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:205) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:381) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:157) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:113) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:117) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-01-23 14:37:41,561 INFO L168 Benchmark]: Toolchain (without parser) took 49677.10 ms. Allocated memory was 309.3 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 268.7 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.6 GB. Max. memory is 5.3 GB. [2018-01-23 14:37:41,563 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 309.3 MB. Free memory is still 273.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-23 14:37:41,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.73 ms. Allocated memory is still 309.3 MB. Free memory was 268.7 MB in the beginning and 259.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. [2018-01-23 14:37:41,563 INFO L168 Benchmark]: Boogie Preprocessor took 30.56 ms. Allocated memory is still 309.3 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-23 14:37:41,564 INFO L168 Benchmark]: RCFGBuilder took 243.55 ms. Allocated memory is still 309.3 MB. Free memory was 257.6 MB in the beginning and 240.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. [2018-01-23 14:37:41,564 INFO L168 Benchmark]: TraceAbstraction took 49224.48 ms. Allocated memory was 309.3 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 240.0 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.6 GB. Max. memory is 5.3 GB. [2018-01-23 14:37:41,566 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 309.3 MB. Free memory is still 273.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 171.73 ms. Allocated memory is still 309.3 MB. Free memory was 268.7 MB in the beginning and 259.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 30.56 ms. Allocated memory is still 309.3 MB. Free memory was 259.6 MB in the beginning and 257.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 243.55 ms. Allocated memory is still 309.3 MB. Free memory was 257.6 MB in the beginning and 240.0 MB in the end (delta: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 5.3 GB. * TraceAbstraction took 49224.48 ms. Allocated memory was 309.3 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 240.0 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.6 GB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: barErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. SAFE Result, 0.3s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, 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, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 17 PreInvPairs, 21 NumberOfFragments, 12 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 361 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. UNSAFE Result, 0.0s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=0, 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, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data for error location: fooErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. SAFE Result, 0.6s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 138 SDtfs, 60 SDslu, 196 SDs, 0 SdLazy, 114 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=2, 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, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 5846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:264) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-23_14-37-41-575.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-23_14-37-41-575.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-23_14-37-41-575.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-read.c_mempurity-32bit-Automizer_Camel+AI_EQ.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-23_14-37-41-575.csv Completed graceful shutdown