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_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-write.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 05:59:06,778 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:59:06,780 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:59:06,796 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:59:06,796 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:59:06,797 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:59:06,798 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:59:06,800 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:59:06,802 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:59:06,803 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:59:06,805 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:59:06,805 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:59:06,806 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:59:06,807 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:59:06,808 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:59:06,811 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:59:06,813 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:59:06,816 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:59:06,817 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:59:06,819 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:59:06,821 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:59:06,827 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:59:06,828 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:59:06,828 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-21 05:59:06,838 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:59:06,838 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:59:06,839 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:59:06,839 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:59:06,839 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:59:06,839 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:59:06,839 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:59:06,840 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:59:06,840 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:59:06,840 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:59:06,840 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:59:06,840 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:59:06,841 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:59:06,841 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:59:06,841 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:59:06,841 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:59:06,841 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:59:06,841 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:59:06,841 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:59:06,842 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:59:06,842 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:59:06,842 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:59:06,842 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:59:06,842 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:59:06,842 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:59:06,843 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:59:06,843 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:59:06,843 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:59:06,843 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:59:06,843 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:59:06,843 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:59:06,844 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:59:06,844 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:59:06,844 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:59:06,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:59:06,844 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:59:06,844 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:59:06,845 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:59:06,845 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:59:06,877 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:59:06,888 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:59:06,891 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:59:06,893 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:59:06,893 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:59:06,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysOfVariableLength2_false-valid-deref-write.c [2018-01-21 05:59:07,019 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:59:07,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:59:07,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:59:07,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:59:07,028 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:59:07,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:59:07" (1/1) ... [2018-01-21 05:59:07,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320e0b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07, skipping insertion in model container [2018-01-21 05:59:07,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:59:07" (1/1) ... [2018-01-21 05:59:07,044 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:59:07,057 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:59:07,170 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:59:07,187 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:59:07,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07 WrapperNode [2018-01-21 05:59:07,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:59:07,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:59:07,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:59:07,195 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:59:07,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07" (1/1) ... [2018-01-21 05:59:07,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07" (1/1) ... [2018-01-21 05:59:07,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07" (1/1) ... [2018-01-21 05:59:07,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07" (1/1) ... [2018-01-21 05:59:07,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07" (1/1) ... [2018-01-21 05:59:07,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07" (1/1) ... [2018-01-21 05:59:07,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07" (1/1) ... [2018-01-21 05:59:07,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:59:07,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:59:07,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:59:07,232 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:59:07,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07" (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 [2018-01-21 05:59:07,288 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:59:07,288 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:59:07,288 INFO L136 BoogieDeclarations]: Found implementation of procedure bar [2018-01-21 05:59:07,288 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 05:59:07,288 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:59:07,289 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:59:07,289 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:59:07,289 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:59:07,289 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:59:07,289 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:59:07,289 INFO L128 BoogieDeclarations]: Found specification of procedure bar [2018-01-21 05:59:07,289 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 05:59:07,289 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:59:07,289 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:59:07,290 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:59:07,502 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:59:07,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:59:07 BoogieIcfgContainer [2018-01-21 05:59:07,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:59:07,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:59:07,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:59:07,505 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:59:07,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:59:07" (1/3) ... [2018-01-21 05:59:07,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b0f2e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:59:07, skipping insertion in model container [2018-01-21 05:59:07,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:59:07" (2/3) ... [2018-01-21 05:59:07,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b0f2e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:59:07, skipping insertion in model container [2018-01-21 05:59:07,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:59:07" (3/3) ... [2018-01-21 05:59:07,509 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_false-valid-deref-write.c [2018-01-21 05:59:07,520 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:59:07,527 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-01-21 05:59:07,570 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:59:07,571 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:59:07,571 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:59:07,571 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:59:07,571 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:59:07,571 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:59:07,571 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:59:07,572 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == barErr0EnsuresViolation======== [2018-01-21 05:59:07,572 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:59:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 05:59:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 05:59:07,598 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:07,599 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] [2018-01-21 05:59:07,599 INFO L371 AbstractCegarLoop]: === Iteration 1 === [barErr0EnsuresViolation]=== [2018-01-21 05:59:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash -492377012, now seen corresponding path program 1 times [2018-01-21 05:59:07,605 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:07,645 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:07,645 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:07,645 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:07,645 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:07,696 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:59:07,737 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:59:07,737 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:59:07,737 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:59:07,739 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:59:07,750 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:59:07,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:59:07,752 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-21 05:59:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:07,773 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-21 05:59:07,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:59:07,774 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 05:59:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:07,780 INFO L225 Difference]: With dead ends: 114 [2018-01-21 05:59:07,780 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 05:59:07,783 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 [2018-01-21 05:59:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 05:59:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 05:59:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 05:59:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 05:59:07,803 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-01-21 05:59:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:07,803 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 05:59:07,804 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:59:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 05:59:07,804 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:59:07,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-01-21 05:59:07,916 INFO L404 ceAbstractionStarter]: At program point L13'''(lines 13 15) the Hoare annotation is: true [2018-01-21 05:59:07,916 INFO L401 ceAbstractionStarter]: For program point barErr0EnsuresViolation(lines 11 17) no Hoare annotation was computed. [2018-01-21 05:59:07,916 INFO L401 ceAbstractionStarter]: For program point L13''(lines 13 15) no Hoare annotation was computed. [2018-01-21 05:59:07,916 INFO L401 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-01-21 05:59:07,916 INFO L401 ceAbstractionStarter]: For program point L13(lines 13 15) no Hoare annotation was computed. [2018-01-21 05:59:07,916 INFO L404 ceAbstractionStarter]: At program point barENTRY(lines 11 17) the Hoare annotation is: true [2018-01-21 05:59:07,917 INFO L401 ceAbstractionStarter]: For program point L13''''(lines 13 15) no Hoare annotation was computed. [2018-01-21 05:59:07,917 INFO L401 ceAbstractionStarter]: For program point barFINAL(lines 11 17) no Hoare annotation was computed. [2018-01-21 05:59:07,917 INFO L401 ceAbstractionStarter]: For program point L14'(line 14) no Hoare annotation was computed. [2018-01-21 05:59:07,917 INFO L401 ceAbstractionStarter]: For program point barEXIT(lines 11 17) no Hoare annotation was computed. [2018-01-21 05:59:07,917 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-21 05:59:07,917 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-21 05:59:07,918 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(lines 1 43) the Hoare annotation is: true [2018-01-21 05:59:07,918 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-21 05:59:07,918 INFO L401 ceAbstractionStarter]: For program point fooEXIT(lines 20 29) no Hoare annotation was computed. [2018-01-21 05:59:07,918 INFO L401 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-01-21 05:59:07,918 INFO L401 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2018-01-21 05:59:07,918 INFO L401 ceAbstractionStarter]: For program point L22(lines 22 24) no Hoare annotation was computed. [2018-01-21 05:59:07,918 INFO L401 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2018-01-21 05:59:07,919 INFO L401 ceAbstractionStarter]: For program point L23'(line 23) no Hoare annotation was computed. [2018-01-21 05:59:07,919 INFO L401 ceAbstractionStarter]: For program point L21'''''(line 21) no Hoare annotation was computed. [2018-01-21 05:59:07,919 INFO L401 ceAbstractionStarter]: For program point L25'(lines 25 27) no Hoare annotation was computed. [2018-01-21 05:59:07,919 INFO L401 ceAbstractionStarter]: For program point L21'''(line 21) no Hoare annotation was computed. [2018-01-21 05:59:07,919 INFO L401 ceAbstractionStarter]: For program point L21'(line 21) no Hoare annotation was computed. [2018-01-21 05:59:07,919 INFO L401 ceAbstractionStarter]: For program point fooFINAL(lines 20 29) no Hoare annotation was computed. [2018-01-21 05:59:07,919 INFO L404 ceAbstractionStarter]: At program point fooENTRY(lines 20 29) the Hoare annotation is: true [2018-01-21 05:59:07,920 INFO L401 ceAbstractionStarter]: For program point L22''(lines 22 24) no Hoare annotation was computed. [2018-01-21 05:59:07,920 INFO L401 ceAbstractionStarter]: For program point L23''(line 23) no Hoare annotation was computed. [2018-01-21 05:59:07,920 INFO L401 ceAbstractionStarter]: For program point L21''(line 21) no Hoare annotation was computed. [2018-01-21 05:59:07,920 INFO L404 ceAbstractionStarter]: At program point L22''''(lines 22 24) the Hoare annotation is: true [2018-01-21 05:59:07,920 INFO L404 ceAbstractionStarter]: At program point L22'''(lines 22 24) the Hoare annotation is: true [2018-01-21 05:59:07,920 INFO L401 ceAbstractionStarter]: For program point fooErr0EnsuresViolation(lines 20 29) no Hoare annotation was computed. [2018-01-21 05:59:07,921 INFO L401 ceAbstractionStarter]: For program point L21''''(line 21) no Hoare annotation was computed. [2018-01-21 05:59:07,921 INFO L404 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(lines 1 43) the Hoare annotation is: true [2018-01-21 05:59:07,921 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 1 43) no Hoare annotation was computed. [2018-01-21 05:59:07,921 INFO L404 ceAbstractionStarter]: At program point L1(lines 1 43) the Hoare annotation is: true [2018-01-21 05:59:07,921 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startErr0EnsuresViolation(lines 1 43) no Hoare annotation was computed. [2018-01-21 05:59:07,921 INFO L401 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 1 43) no Hoare annotation was computed. [2018-01-21 05:59:07,922 INFO L404 ceAbstractionStarter]: At program point L36''(lines 36 40) the Hoare annotation is: true [2018-01-21 05:59:07,922 INFO L401 ceAbstractionStarter]: For program point L33''(lines 33 35) no Hoare annotation was computed. [2018-01-21 05:59:07,922 INFO L401 ceAbstractionStarter]: For program point L34''(line 34) no Hoare annotation was computed. [2018-01-21 05:59:07,922 INFO L404 ceAbstractionStarter]: At program point L33'''(lines 33 35) the Hoare annotation is: true [2018-01-21 05:59:07,922 INFO L401 ceAbstractionStarter]: For program point L32''(line 32) no Hoare annotation was computed. [2018-01-21 05:59:07,922 INFO L401 ceAbstractionStarter]: For program point L37'(line 37) no Hoare annotation was computed. [2018-01-21 05:59:07,922 INFO L401 ceAbstractionStarter]: For program point L32''''(line 32) no Hoare annotation was computed. [2018-01-21 05:59:07,923 INFO L401 ceAbstractionStarter]: For program point L32'''''(line 32) no Hoare annotation was computed. [2018-01-21 05:59:07,923 INFO L401 ceAbstractionStarter]: For program point mainErr0EnsuresViolation(lines 31 42) no Hoare annotation was computed. [2018-01-21 05:59:07,923 INFO L401 ceAbstractionStarter]: For program point L36'''(lines 36 40) no Hoare annotation was computed. [2018-01-21 05:59:07,923 INFO L401 ceAbstractionStarter]: For program point mainFINAL(lines 31 42) no Hoare annotation was computed. [2018-01-21 05:59:07,923 INFO L401 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2018-01-21 05:59:07,923 INFO L401 ceAbstractionStarter]: For program point L32'''(line 32) no Hoare annotation was computed. [2018-01-21 05:59:07,923 INFO L404 ceAbstractionStarter]: At program point L34(line 34) the Hoare annotation is: true [2018-01-21 05:59:07,924 INFO L401 ceAbstractionStarter]: For program point L33(lines 33 35) no Hoare annotation was computed. [2018-01-21 05:59:07,924 INFO L401 ceAbstractionStarter]: For program point L34'''(line 34) no Hoare annotation was computed. [2018-01-21 05:59:07,924 INFO L401 ceAbstractionStarter]: For program point L33''''(lines 33 35) no Hoare annotation was computed. [2018-01-21 05:59:07,924 INFO L401 ceAbstractionStarter]: For program point L36(lines 36 40) no Hoare annotation was computed. [2018-01-21 05:59:07,924 INFO L401 ceAbstractionStarter]: For program point mainEXIT(lines 31 42) no Hoare annotation was computed. [2018-01-21 05:59:07,924 INFO L404 ceAbstractionStarter]: At program point mainENTRY(lines 31 42) the Hoare annotation is: true [2018-01-21 05:59:07,924 INFO L401 ceAbstractionStarter]: For program point L38(line 38) no Hoare annotation was computed. [2018-01-21 05:59:07,925 INFO L401 ceAbstractionStarter]: For program point L37(line 37) no Hoare annotation was computed. [2018-01-21 05:59:07,925 INFO L401 ceAbstractionStarter]: For program point L34'(line 34) no Hoare annotation was computed. [2018-01-21 05:59:07,925 INFO L401 ceAbstractionStarter]: For program point L32'(line 32) no Hoare annotation was computed. [2018-01-21 05:59:07,929 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:59:07,929 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:59:07,929 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:59:07,929 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:59:07,929 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:59:07,929 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:59:07,930 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:59:07,930 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 05:59:07,930 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:59:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 05:59:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 05:59:07,933 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:07,933 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 05:59:07,933 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 05:59:07,933 INFO L82 PathProgramCache]: Analyzing trace with hash 136143, now seen corresponding path program 1 times [2018-01-21 05:59:07,934 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:07,935 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:07,935 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:07,935 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:07,935 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:59:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 05:59:07,965 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 05:59:07,970 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 05:59:07,974 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:59:07,974 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:59:07,974 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:59:07,974 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:59:07,974 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:59:07,975 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:59:07,975 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:59:07,975 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 05:59:07,975 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:59:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 05:59:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-21 05:59:07,978 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:07,978 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] [2018-01-21 05:59:07,979 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 05:59:07,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1220349549, now seen corresponding path program 1 times [2018-01-21 05:59:07,979 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:07,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:07,980 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:07,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:07,980 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:07,995 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:59:08,018 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:59:08,018 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:59:08,018 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:59:08,019 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:59:08,019 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:59:08,019 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:59:08,019 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-21 05:59:08,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:08,028 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-21 05:59:08,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:59:08,028 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2018-01-21 05:59:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:08,031 INFO L225 Difference]: With dead ends: 114 [2018-01-21 05:59:08,031 INFO L226 Difference]: Without dead ends: 43 [2018-01-21 05:59:08,032 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 [2018-01-21 05:59:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-01-21 05:59:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-01-21 05:59:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-01-21 05:59:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-01-21 05:59:08,045 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2018-01-21 05:59:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:08,046 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-01-21 05:59:08,046 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:59:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-01-21 05:59:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 05:59:08,047 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:08,047 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] [2018-01-21 05:59:08,047 INFO L371 AbstractCegarLoop]: === Iteration 2 === [fooErr0EnsuresViolation]=== [2018-01-21 05:59:08,048 INFO L82 PathProgramCache]: Analyzing trace with hash 390316661, now seen corresponding path program 1 times [2018-01-21 05:59:08,048 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:08,049 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,049 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:08,050 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,050 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:08,073 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:59:08,201 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:59:08,201 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-01-21 05:59:08,201 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:59:08,203 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 05:59:08,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 05:59:08,204 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-01-21 05:59:08,204 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 7 states. [2018-01-21 05:59:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:08,334 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2018-01-21 05:59:08,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 05:59:08,335 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-01-21 05:59:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:08,339 INFO L225 Difference]: With dead ends: 112 [2018-01-21 05:59:08,339 INFO L226 Difference]: Without dead ends: 77 [2018-01-21 05:59:08,340 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 [2018-01-21 05:59:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-01-21 05:59:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2018-01-21 05:59:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-01-21 05:59:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2018-01-21 05:59:08,359 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 28 [2018-01-21 05:59:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:08,359 INFO L432 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2018-01-21 05:59:08,359 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 05:59:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2018-01-21 05:59:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-01-21 05:59:08,362 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:08,362 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] [2018-01-21 05:59:08,362 INFO L371 AbstractCegarLoop]: === Iteration 3 === [fooErr0EnsuresViolation]=== [2018-01-21 05:59:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2078164222, now seen corresponding path program 1 times [2018-01-21 05:59:08,362 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:08,363 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,363 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:08,364 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,364 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:08,381 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:59:08,461 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:59:08,462 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 05:59:08,462 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:59:08,462 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:59:08,462 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:59:08,462 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:59:08,463 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 6 states. [2018-01-21 05:59:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:08,637 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2018-01-21 05:59:08,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 05:59:08,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2018-01-21 05:59:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:08,639 INFO L225 Difference]: With dead ends: 129 [2018-01-21 05:59:08,639 INFO L226 Difference]: Without dead ends: 80 [2018-01-21 05:59:08,640 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-01-21 05:59:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-21 05:59:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2018-01-21 05:59:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-01-21 05:59:08,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-01-21 05:59:08,647 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 33 [2018-01-21 05:59:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:08,647 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2018-01-21 05:59:08,647 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:59:08,647 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2018-01-21 05:59:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-21 05:59:08,648 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:08,648 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:59:08,648 INFO L371 AbstractCegarLoop]: === Iteration 4 === [fooErr0EnsuresViolation]=== [2018-01-21 05:59:08,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1168283626, now seen corresponding path program 1 times [2018-01-21 05:59:08,648 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:08,649 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,649 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:08,649 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,649 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:08,672 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 05:59:08,748 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:59:08,748 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 05:59:08,749 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:59:08,749 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:59:08,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:59:08,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:59:08,750 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 4 states. [2018-01-21 05:59:08,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:08,805 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2018-01-21 05:59:08,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 05:59:08,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2018-01-21 05:59:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:08,806 INFO L225 Difference]: With dead ends: 71 [2018-01-21 05:59:08,806 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 05:59:08,807 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 [2018-01-21 05:59:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 05:59:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 05:59:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 05:59:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 05:59:08,808 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-01-21 05:59:08,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:08,808 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 05:59:08,808 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:59:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 05:59:08,808 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 05:59:08,809 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:59:08,810 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:59:08,810 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:59:08,810 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:59:08,810 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:59:08,810 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:59:08,810 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:59:08,810 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 05:59:08,810 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:59:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 05:59:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 05:59:08,812 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:08,812 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:59:08,812 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:59:08,812 INFO L82 PathProgramCache]: Analyzing trace with hash -851979775, now seen corresponding path program 1 times [2018-01-21 05:59:08,812 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:08,813 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,813 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:08,813 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,813 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:08,819 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:59:08,825 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:59:08,825 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 05:59:08,825 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:59:08,825 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 05:59:08,826 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 05:59:08,826 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 05:59:08,826 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2018-01-21 05:59:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:08,831 INFO L93 Difference]: Finished difference Result 114 states and 135 transitions. [2018-01-21 05:59:08,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 05:59:08,832 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-21 05:59:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:08,833 INFO L225 Difference]: With dead ends: 114 [2018-01-21 05:59:08,833 INFO L226 Difference]: Without dead ends: 57 [2018-01-21 05:59:08,834 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 [2018-01-21 05:59:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-21 05:59:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-01-21 05:59:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-21 05:59:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-21 05:59:08,839 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 17 [2018-01-21 05:59:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:08,839 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-21 05:59:08,840 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 05:59:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-21 05:59:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 05:59:08,840 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:08,841 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:59:08,841 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:59:08,841 INFO L82 PathProgramCache]: Analyzing trace with hash -178858898, now seen corresponding path program 1 times [2018-01-21 05:59:08,841 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:08,842 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,842 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:08,842 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,842 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:08,847 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:59:08,856 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:59:08,856 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 05:59:08,856 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:59:08,857 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 05:59:08,857 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 05:59:08,857 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 05:59:08,857 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 3 states. [2018-01-21 05:59:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:08,871 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2018-01-21 05:59:08,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 05:59:08,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-21 05:59:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:08,872 INFO L225 Difference]: With dead ends: 76 [2018-01-21 05:59:08,872 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 05:59:08,873 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 [2018-01-21 05:59:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 05:59:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2018-01-21 05:59:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-01-21 05:59:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-01-21 05:59:08,878 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 19 [2018-01-21 05:59:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:08,878 INFO L432 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-01-21 05:59:08,878 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 05:59:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-01-21 05:59:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-01-21 05:59:08,880 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:08,880 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] [2018-01-21 05:59:08,881 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:59:08,881 INFO L82 PathProgramCache]: Analyzing trace with hash -853032378, now seen corresponding path program 1 times [2018-01-21 05:59:08,881 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:08,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,882 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:08,882 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:08,882 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:08,896 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:59:08,925 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:08,925 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:59:08,926 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2018-01-21 05:59:08,927 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [17], [18], [20], [21], [23], [24], [25], [29], [32], [44], [50], [51], [52], [53], [58], [59], [60], [61], [65], [68], [70], [72], [73], [74], [76], [80], [84], [89], [90], [93], [95], [96], [97], [106], [108], [109], [110], [111], [112], [113], [114], [115] [2018-01-21 05:59:08,970 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:59:08,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 05:59:11,645 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 05:59:11,647 INFO L268 AbstractInterpreter]: Visited 45 different actions 81 times. Merged at 17 different actions 17 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 23 variables. [2018-01-21 05:59:11,658 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 05:59:11,658 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:11,659 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-01-21 05:59:11,675 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:11,675 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:59:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:11,719 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:59:11,885 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:59:12,239 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-21 05:59:12,240 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 10 [2018-01-21 05:59:12,240 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:59:12,240 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:59:12,241 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:59:12,241 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-01-21 05:59:12,241 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 6 states. [2018-01-21 05:59:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:12,470 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2018-01-21 05:59:12,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 05:59:12,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2018-01-21 05:59:12,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:12,471 INFO L225 Difference]: With dead ends: 117 [2018-01-21 05:59:12,471 INFO L226 Difference]: Without dead ends: 62 [2018-01-21 05:59:12,472 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-01-21 05:59:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-01-21 05:59:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2018-01-21 05:59:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-21 05:59:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2018-01-21 05:59:12,478 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 46 [2018-01-21 05:59:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:12,478 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2018-01-21 05:59:12,478 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:59:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2018-01-21 05:59:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-01-21 05:59:12,480 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:12,480 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:59:12,481 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:59:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash -731617746, now seen corresponding path program 1 times [2018-01-21 05:59:12,481 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:12,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:12,482 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:12,482 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:12,483 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:12,501 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:59:12,541 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:12,541 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:59:12,541 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 53 with the following transitions: [2018-01-21 05:59:12,541 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [17], [18], [20], [21], [23], [24], [25], [29], [32], [34], [35], [36], [37], [39], [44], [50], [51], [52], [53], [58], [59], [60], [61], [65], [68], [70], [72], [73], [74], [76], [80], [84], [89], [90], [93], [95], [96], [97], [106], [108], [109], [110], [111], [112], [113], [114], [115] [2018-01-21 05:59:12,543 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:59:12,543 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 05:59:34,379 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 05:59:34,379 INFO L268 AbstractInterpreter]: Visited 50 different actions 150 times. Merged at 30 different actions 55 times. Never widened. Found 7 fixpoints after 5 different actions. Largest state had 25 variables. [2018-01-21 05:59:34,385 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 05:59:34,385 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:34,385 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-01-21 05:59:34,394 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:34,394 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:59:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:34,425 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:59:34,520 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 05:59:34,923 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-01-21 05:59:34,923 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [4] total 11 [2018-01-21 05:59:34,923 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:59:34,924 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-01-21 05:59:34,924 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-01-21 05:59:34,924 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-01-21 05:59:34,924 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 7 states. [2018-01-21 05:59:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:35,039 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2018-01-21 05:59:35,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-01-21 05:59:35,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2018-01-21 05:59:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:35,042 INFO L225 Difference]: With dead ends: 122 [2018-01-21 05:59:35,042 INFO L226 Difference]: Without dead ends: 63 [2018-01-21 05:59:35,042 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-01-21 05:59:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-01-21 05:59:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2018-01-21 05:59:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-21 05:59:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2018-01-21 05:59:35,048 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 52 [2018-01-21 05:59:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:35,048 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2018-01-21 05:59:35,048 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-01-21 05:59:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2018-01-21 05:59:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-21 05:59:35,050 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:35,051 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-01-21 05:59:35,051 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:59:35,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1697227175, now seen corresponding path program 1 times [2018-01-21 05:59:35,051 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:35,052 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:35,052 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:35,052 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:35,052 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:35,068 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 05:59:35,116 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:35,117 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:59:35,117 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-01-21 05:59:35,117 INFO L201 CegarAbsIntRunner]: [0], [4], [7], [9], [10], [11], [13], [17], [18], [20], [21], [23], [24], [25], [29], [32], [34], [35], [36], [37], [39], [44], [50], [51], [52], [53], [58], [59], [60], [61], [65], [68], [70], [72], [73], [74], [76], [80], [84], [89], [90], [93], [95], [96], [97], [106], [108], [109], [110], [111], [112], [113], [114], [115] [2018-01-21 05:59:35,119 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:59:35,119 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 05:59:57,236 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 05:59:57,236 INFO L268 AbstractInterpreter]: Visited 54 different actions 223 times. Merged at 38 different actions 103 times. Never widened. Found 17 fixpoints after 7 different actions. Largest state had 25 variables. [2018-01-21 05:59:57,239 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 05:59:57,239 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:57,239 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-01-21 05:59:57,245 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:57,245 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:59:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:57,266 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 05:59:57,276 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 05:59:57,323 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:57,323 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 05:59:57,326 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:57,326 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 05:59:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:57,362 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 05:59:57,366 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 05:59:57,462 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 05:59:57,462 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-21 05:59:57,462 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 05:59:57,463 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 05:59:57,463 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 05:59:57,463 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 05:59:57,463 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 5 states. [2018-01-21 05:59:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:57,480 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2018-01-21 05:59:57,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:59:57,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2018-01-21 05:59:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:57,481 INFO L225 Difference]: With dead ends: 84 [2018-01-21 05:59:57,481 INFO L226 Difference]: Without dead ends: 72 [2018-01-21 05:59:57,482 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 05:59:57,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-21 05:59:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2018-01-21 05:59:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-21 05:59:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2018-01-21 05:59:57,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 57 [2018-01-21 05:59:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:57,488 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2018-01-21 05:59:57,488 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 05:59:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2018-01-21 05:59:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-01-21 05:59:57,490 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:57,490 INFO L322 BasicCegarLoop]: trace histogram [4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:59:57,490 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:59:57,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1018648941, now seen corresponding path program 2 times [2018-01-21 05:59:57,490 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:57,491 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:57,491 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:59:57,492 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:57,492 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:57,514 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-01-21 05:59:57,579 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:57,579 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:59:57,579 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 05:59:57,580 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 05:59:57,580 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:57,580 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-01-21 05:59:57,602 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 05:59:57,602 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 05:59:57,651 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 05:59:57,664 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 05:59:57,666 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 05:59:57,670 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-01-21 05:59:57,718 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2018-01-21 05:59:57,836 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:57,837 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 05:59:57,840 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 05:59:57,840 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 05:59:57,855 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 05:59:57,879 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 05:59:57,896 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 05:59:57,901 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-01-21 05:59:57,923 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-01-21 05:59:57,974 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 05:59:57,974 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8, 5, 5] total 18 [2018-01-21 05:59:57,974 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 05:59:57,974 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-21 05:59:57,974 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-21 05:59:57,975 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-01-21 05:59:57,975 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 11 states. [2018-01-21 05:59:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:58,124 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2018-01-21 05:59:58,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-21 05:59:58,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2018-01-21 05:59:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:58,126 INFO L225 Difference]: With dead ends: 178 [2018-01-21 05:59:58,127 INFO L226 Difference]: Without dead ends: 128 [2018-01-21 05:59:58,127 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 357 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2018-01-21 05:59:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-01-21 05:59:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 100. [2018-01-21 05:59:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-21 05:59:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2018-01-21 05:59:58,137 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 93 [2018-01-21 05:59:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:58,137 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2018-01-21 05:59:58,137 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-21 05:59:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2018-01-21 05:59:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-01-21 05:59:58,140 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:58,140 INFO L322 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:59:58,140 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:59:58,141 INFO L82 PathProgramCache]: Analyzing trace with hash 737188527, now seen corresponding path program 3 times [2018-01-21 05:59:58,141 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:58,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:58,142 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 05:59:58,142 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:58,142 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:58,175 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2018-01-21 05:59:58,260 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:58,260 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:59:58,260 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 05:59:58,260 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 05:59:58,260 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:58,260 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-01-21 05:59:58,267 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 05:59:58,267 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 05:59:58,284 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 05:59:58,292 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 05:59:58,300 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 05:59:58,308 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 05:59:58,313 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-01-21 05:59:58,381 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-01-21 05:59:58,719 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:58,719 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 05:59:58,722 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 05:59:58,722 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 05:59:58,738 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 05:59:58,751 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 05:59:58,775 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 05:59:58,790 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 05:59:58,795 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-01-21 05:59:58,809 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-01-21 05:59:58,952 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 05:59:58,952 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9, 9, 9] total 18 [2018-01-21 05:59:58,952 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 05:59:58,953 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 05:59:58,954 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 05:59:58,954 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2018-01-21 05:59:58,954 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand 12 states. [2018-01-21 05:59:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:59:59,111 INFO L93 Difference]: Finished difference Result 171 states and 195 transitions. [2018-01-21 05:59:59,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-21 05:59:59,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2018-01-21 05:59:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:59:59,112 INFO L225 Difference]: With dead ends: 171 [2018-01-21 05:59:59,113 INFO L226 Difference]: Without dead ends: 150 [2018-01-21 05:59:59,113 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 547 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2018-01-21 05:59:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-01-21 05:59:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2018-01-21 05:59:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-01-21 05:59:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2018-01-21 05:59:59,121 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 141 [2018-01-21 05:59:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:59:59,121 INFO L432 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2018-01-21 05:59:59,121 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 05:59:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2018-01-21 05:59:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-01-21 05:59:59,123 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:59:59,123 INFO L322 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 05:59:59,123 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 05:59:59,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1663187030, now seen corresponding path program 4 times [2018-01-21 05:59:59,124 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:59:59,124 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:59,124 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 05:59:59,124 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:59:59,124 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:59:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:59:59,157 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:59:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2018-01-21 05:59:59,304 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:59,304 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:59:59,304 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 05:59:59,304 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 05:59:59,304 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:59,304 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-01-21 05:59:59,318 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 05:59:59,318 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 05:59:59,365 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 05:59:59,368 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 324 proven. 10 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-01-21 05:59:59,444 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 116 proven. 53 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2018-01-21 05:59:59,624 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:59:59,624 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 05:59:59,628 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 05:59:59,628 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 05:59:59,727 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 05:59:59,735 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 05:59:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 324 proven. 10 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-01-21 05:59:59,766 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 05:59:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 116 proven. 53 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2018-01-21 05:59:59,961 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 05:59:59,961 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10, 10, 10] total 19 [2018-01-21 05:59:59,961 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 05:59:59,962 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-01-21 05:59:59,962 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-01-21 05:59:59,962 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2018-01-21 05:59:59,963 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand 15 states. [2018-01-21 06:00:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:00:00,183 INFO L93 Difference]: Finished difference Result 405 states and 487 transitions. [2018-01-21 06:00:00,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-01-21 06:00:00,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 198 [2018-01-21 06:00:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:00:00,185 INFO L225 Difference]: With dead ends: 405 [2018-01-21 06:00:00,185 INFO L226 Difference]: Without dead ends: 313 [2018-01-21 06:00:00,186 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 808 GetRequests, 773 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2018-01-21 06:00:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-01-21 06:00:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 162. [2018-01-21 06:00:00,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-01-21 06:00:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2018-01-21 06:00:00,202 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 198 [2018-01-21 06:00:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:00:00,202 INFO L432 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2018-01-21 06:00:00,202 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-01-21 06:00:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2018-01-21 06:00:00,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-01-21 06:00:00,205 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:00:00,205 INFO L322 BasicCegarLoop]: trace histogram [17, 13, 12, 12, 12, 12, 12, 8, 8, 8, 8, 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] [2018-01-21 06:00:00,205 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:00:00,205 INFO L82 PathProgramCache]: Analyzing trace with hash 601612238, now seen corresponding path program 5 times [2018-01-21 06:00:00,206 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:00:00,206 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:00:00,206 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 06:00:00,206 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:00:00,206 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:00:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:00:00,244 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:00:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2018-01-21 06:00:00,419 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:00:00,420 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 06:00:00,420 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 06:00:00,420 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 06:00:00,420 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:00:00,420 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG 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 [2018-01-21 06:00:00,427 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 06:00:00,428 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 06:00:00,448 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 06:00:00,456 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 06:00:00,468 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 06:00:00,470 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 06:00:00,474 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 06:00:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 483 proven. 10 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2018-01-21 06:00:00,544 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 06:00:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 81 proven. 238 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-01-21 06:00:00,711 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:00:00,711 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 06:00:00,713 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 06:00:00,714 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 06:00:00,742 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 06:00:00,764 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command Received shutdown request... [2018-01-21 06:00:02,366 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 06:00:02,404 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 06:00:02,415 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 06:00:02,419 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 06:00:02,419 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 06:00:02,422 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:00:02,422 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:00:02,422 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:00:02,422 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:00:02,422 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:00:02,422 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:00:02,422 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:00:02,422 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 06:00:02,423 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:00:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2018-01-21 06:00:02,424 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 06:00:02,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 06:00:02 BoogieIcfgContainer [2018-01-21 06:00:02,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 06:00:02,426 INFO L168 Benchmark]: Toolchain (without parser) took 55406.59 ms. Allocated memory was 308.8 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 269.7 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 300.3 MB. Max. memory is 5.3 GB. [2018-01-21 06:00:02,427 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 308.8 MB. Free memory is still 274.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 06:00:02,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.77 ms. Allocated memory is still 308.8 MB. Free memory was 269.7 MB in the beginning and 260.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. [2018-01-21 06:00:02,427 INFO L168 Benchmark]: Boogie Preprocessor took 36.71 ms. Allocated memory is still 308.8 MB. Free memory was 260.6 MB in the beginning and 258.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 06:00:02,428 INFO L168 Benchmark]: RCFGBuilder took 271.07 ms. Allocated memory is still 308.8 MB. Free memory was 258.6 MB in the beginning and 240.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. [2018-01-21 06:00:02,428 INFO L168 Benchmark]: TraceAbstraction took 54921.64 ms. Allocated memory was 308.8 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 240.6 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 271.2 MB. Max. memory is 5.3 GB. [2018-01-21 06:00:02,430 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 308.8 MB. Free memory is still 274.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 170.77 ms. Allocated memory is still 308.8 MB. Free memory was 269.7 MB in the beginning and 260.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 36.71 ms. Allocated memory is still 308.8 MB. Free memory was 260.6 MB in the beginning and 258.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 271.07 ms. Allocated memory is still 308.8 MB. Free memory was 258.6 MB in the beginning and 240.6 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 54921.64 ms. Allocated memory was 308.8 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 240.6 MB in the beginning and 1.4 GB in the end (delta: -1.1 GB). Peak memory consumption was 271.2 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 44 LocStat_MAX_WEQGRAPH_SIZE : 2 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 400 LocStat_NO_SUPPORTING_DISEQUALITIES : 98 LocStat_NO_DISJUNCTIONS : -88 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 53 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 66 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 53 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.450002 RENAME_VARIABLES(MILLISECONDS) : 0.237576 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.408400 PROJECTAWAY(MILLISECONDS) : 0.186707 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.082198 DISJOIN(MILLISECONDS) : 0.203686 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.268307 ADD_EQUALITY(MILLISECONDS) : 0.027414 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.011168 #CONJOIN_DISJUNCTIVE : 98 #RENAME_VARIABLES : 195 #UNFREEZE : 0 #CONJOIN : 159 #PROJECTAWAY : 167 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 18 #RENAME_VARIABLES_DISJUNCTIVE : 195 #ADD_EQUALITY : 67 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 48 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 1 LocStat_NO_SUPPORTING_EQUALITIES : 443 LocStat_NO_SUPPORTING_DISEQUALITIES : 112 LocStat_NO_DISJUNCTIONS : -96 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 58 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 69 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 58 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.200857 RENAME_VARIABLES(MILLISECONDS) : 0.121461 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.175322 PROJECTAWAY(MILLISECONDS) : 0.105964 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.038037 DISJOIN(MILLISECONDS) : 0.106148 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.137217 ADD_EQUALITY(MILLISECONDS) : 0.017273 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.011056 #CONJOIN_DISJUNCTIVE : 198 #RENAME_VARIABLES : 441 #UNFREEZE : 0 #CONJOIN : 315 #PROJECTAWAY : 309 #ADD_WEAK_EQUALITY : 11 #DISJOIN : 50 #RENAME_VARIABLES_DISJUNCTIVE : 441 #ADD_EQUALITY : 71 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 51 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 455 LocStat_NO_SUPPORTING_DISEQUALITIES : 123 LocStat_NO_DISJUNCTIONS : -102 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 62 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 72 TransStat_NO_SUPPORTING_DISEQUALITIES : 8 TransStat_NO_DISJUNCTIONS : 62 TransStat_MAX_NO_DISJUNCTIONS : 1 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.159753 RENAME_VARIABLES(MILLISECONDS) : 0.162398 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.143280 PROJECTAWAY(MILLISECONDS) : 0.084284 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.031952 DISJOIN(MILLISECONDS) : 0.088019 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.180263 ADD_EQUALITY(MILLISECONDS) : 0.013465 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.008004 #CONJOIN_DISJUNCTIVE : 293 #RENAME_VARIABLES : 667 #UNFREEZE : 0 #CONJOIN : 456 #PROJECTAWAY : 454 #ADD_WEAK_EQUALITY : 11 #DISJOIN : 72 #RENAME_VARIABLES_DISJUNCTIVE : 667 #ADD_EQUALITY : 74 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 4 * 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, 0.8s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 175 SDtfs, 104 SDslu, 345 SDs, 0 SdLazy, 164 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=3, 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, 4 MinimizatonAttempts, 17 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 10806 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 1]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 1). Cancelled while BasicCegarLoop was analyzing trace of length 259 with TraceHistMax 17, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. TIMEOUT Result, 53.6s OverallTime, 9 OverallIterations, 17 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 395 SDtfs, 537 SDslu, 1385 SDs, 0 SdLazy, 837 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2201 GetRequests, 2083 SyntacticMatches, 28 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 46.6s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 223 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 1699 NumberOfCodeBlocks, 1551 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 2747 ConstructedInterpolants, 0 QuantifiedInterpolants, 628835 SizeOfPredicates, 29 NumberOfNonLiveVariables, 2382 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 28 InterpolantComputations, 6 PerfectInterpolantSequences, 3591/3853 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that all allocated memory was freed (line 31). Cancelled while IsEmpty was searching accepting run (input had 62 states). - StatisticsResult: Ultimate Automizer benchmark data for error location: mainErr0EnsuresViolation CFG has 5 procedures, 62 locations, 5 error locations. TIMEOUT Result, 0.0s OverallTime, 0 OverallIterations, 0 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: No data available, REUSE_STATISTICS: No data available RESULT: Ultimate proved your program to be incorrect! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-Benchmark-0-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-0-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-0-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-1-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-1-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-VPDomainBenchmark-2-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-BenchmarkWithCounters-2-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-1-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-2-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-3-2018-01-21_06-00-02-445.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ArraysOfVariableLength2_false-valid-deref-write.c_mempurity-32bit-Automizer_Taipan+AI_EQ_precise.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-4-2018-01-21_06-00-02-445.csv Completed graceful shutdown