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/forester-heap/sll-01_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 06:26:24,778 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 06:26:24,780 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 06:26:24,796 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 06:26:24,796 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 06:26:24,797 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 06:26:24,797 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 06:26:24,799 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 06:26:24,800 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 06:26:24,801 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 06:26:24,801 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 06:26:24,801 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 06:26:24,802 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 06:26:24,803 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 06:26:24,804 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 06:26:24,806 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 06:26:24,809 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 06:26:24,811 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 06:26:24,812 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 06:26:24,814 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 06:26:24,816 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 06:26:24,822 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 06:26:24,832 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 06:26:24,833 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 06:26:24,833 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 06:26:24,834 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 06:26:24,834 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 06:26:24,834 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 06:26:24,834 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 06:26:24,834 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 06:26:24,835 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 06:26:24,835 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 06:26:24,835 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 06:26:24,836 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 06:26:24,836 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 06:26:24,836 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 06:26:24,836 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 06:26:24,836 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 06:26:24,837 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 06:26:24,837 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 06:26:24,837 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 06:26:24,837 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 06:26:24,837 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 06:26:24,838 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 06:26:24,838 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 06:26:24,838 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 06:26:24,838 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 06:26:24,838 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 06:26:24,839 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 06:26:24,839 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 06:26:24,839 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 06:26:24,839 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 06:26:24,839 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 06:26:24,840 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 06:26:24,840 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 06:26:24,840 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 06:26:24,840 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 06:26:24,840 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 06:26:24,840 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 06:26:24,841 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 06:26:24,842 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 06:26:24,877 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 06:26:24,891 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 06:26:24,895 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 06:26:24,896 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 06:26:24,897 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 06:26:24,898 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01_true-unreach-call_true-valid-memsafety.i [2018-01-21 06:26:25,076 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 06:26:25,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 06:26:25,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 06:26:25,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 06:26:25,090 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 06:26:25,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:26:25" (1/1) ... [2018-01-21 06:26:25,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c1589c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25, skipping insertion in model container [2018-01-21 06:26:25,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 06:26:25" (1/1) ... [2018-01-21 06:26:25,114 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:26:25,157 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 06:26:25,284 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:26:25,312 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 06:26:25,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25 WrapperNode [2018-01-21 06:26:25,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 06:26:25,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 06:26:25,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 06:26:25,325 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 06:26:25,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25" (1/1) ... [2018-01-21 06:26:25,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25" (1/1) ... [2018-01-21 06:26:25,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25" (1/1) ... [2018-01-21 06:26:25,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25" (1/1) ... [2018-01-21 06:26:25,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25" (1/1) ... [2018-01-21 06:26:25,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25" (1/1) ... [2018-01-21 06:26:25,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25" (1/1) ... [2018-01-21 06:26:25,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 06:26:25,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 06:26:25,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 06:26:25,366 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 06:26:25,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25" (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 06:26:25,415 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 06:26:25,415 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 06:26:25,415 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 06:26:25,415 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 06:26:25,415 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 06:26:25,416 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 06:26:25,836 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 06:26:25,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:26:25 BoogieIcfgContainer [2018-01-21 06:26:25,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 06:26:25,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 06:26:25,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 06:26:25,840 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 06:26:25,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 06:26:25" (1/3) ... [2018-01-21 06:26:25,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fab11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:26:25, skipping insertion in model container [2018-01-21 06:26:25,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 06:26:25" (2/3) ... [2018-01-21 06:26:25,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69fab11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 06:26:25, skipping insertion in model container [2018-01-21 06:26:25,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 06:26:25" (3/3) ... [2018-01-21 06:26:25,843 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-01_true-unreach-call_true-valid-memsafety.i [2018-01-21 06:26:25,850 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 06:26:25,857 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 06:26:25,912 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:26:25,912 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:26:25,912 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:26:25,913 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:26:25,913 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:26:25,913 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:26:25,913 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:26:25,913 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 06:26:25,914 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:26:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2018-01-21 06:26:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 06:26:25,947 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:26:25,948 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 06:26:25,948 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 06:26:25,954 INFO L82 PathProgramCache]: Analyzing trace with hash 393051, now seen corresponding path program 1 times [2018-01-21 06:26:25,957 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:26:26,021 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:26,021 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:26:26,022 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:26,022 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:26:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:26:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:26:26,090 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:26:26,099 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:26:26,108 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:26:26,108 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:26:26,108 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:26:26,108 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:26:26,108 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:26:26,109 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:26:26,109 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:26:26,109 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 06:26:26,109 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:26:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2018-01-21 06:26:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-01-21 06:26:26,116 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:26:26,116 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] [2018-01-21 06:26:26,116 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:26:26,116 INFO L82 PathProgramCache]: Analyzing trace with hash -232031712, now seen corresponding path program 1 times [2018-01-21 06:26:26,116 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:26:26,118 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:26,118 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:26:26,118 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:26,118 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:26:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:26:26,140 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:26:26,179 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 06:26:26,181 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:26:26,181 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:26:26,182 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:26:26,184 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:26:26,289 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:26:26,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:26:26,293 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 2 states. [2018-01-21 06:26:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:26:26,323 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2018-01-21 06:26:26,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:26:26,324 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2018-01-21 06:26:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:26:26,334 INFO L225 Difference]: With dead ends: 237 [2018-01-21 06:26:26,334 INFO L226 Difference]: Without dead ends: 120 [2018-01-21 06:26:26,337 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 06:26:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-01-21 06:26:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-01-21 06:26:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-21 06:26:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2018-01-21 06:26:26,374 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 23 [2018-01-21 06:26:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:26:26,374 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2018-01-21 06:26:26,374 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:26:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2018-01-21 06:26:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 06:26:26,375 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:26:26,376 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:26:26,376 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:26:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash -448715966, now seen corresponding path program 1 times [2018-01-21 06:26:26,376 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:26:26,377 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:26,377 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:26:26,377 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:26,377 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:26:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:26:26,400 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:26:26,544 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 06:26:26,545 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:26:26,545 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:26:26,545 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:26:26,547 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:26:26,547 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:26:26,547 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:26:26,548 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 5 states. [2018-01-21 06:26:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:26:26,824 INFO L93 Difference]: Finished difference Result 280 states and 303 transitions. [2018-01-21 06:26:26,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 06:26:26,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 06:26:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:26:26,830 INFO L225 Difference]: With dead ends: 280 [2018-01-21 06:26:26,830 INFO L226 Difference]: Without dead ends: 188 [2018-01-21 06:26:26,832 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 06:26:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-01-21 06:26:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2018-01-21 06:26:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-01-21 06:26:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2018-01-21 06:26:26,845 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 36 [2018-01-21 06:26:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:26:26,845 INFO L432 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2018-01-21 06:26:26,845 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:26:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2018-01-21 06:26:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 06:26:26,847 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:26:26,847 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:26:26,847 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:26:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1412768891, now seen corresponding path program 1 times [2018-01-21 06:26:26,848 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:26:26,849 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:26,849 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:26:26,849 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:26,849 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:26:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:26:26,868 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:26:26,939 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 06:26:26,939 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:26:26,939 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:26:26,939 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:26:26,940 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:26:26,940 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:26:26,940 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:26:26,940 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 5 states. [2018-01-21 06:26:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:26:27,047 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2018-01-21 06:26:27,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:26:27,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2018-01-21 06:26:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:26:27,050 INFO L225 Difference]: With dead ends: 206 [2018-01-21 06:26:27,051 INFO L226 Difference]: Without dead ends: 179 [2018-01-21 06:26:27,051 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 06:26:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-01-21 06:26:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 128. [2018-01-21 06:26:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-01-21 06:26:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2018-01-21 06:26:27,061 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 38 [2018-01-21 06:26:27,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:26:27,061 INFO L432 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2018-01-21 06:26:27,061 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:26:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2018-01-21 06:26:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-21 06:26:27,064 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:26:27,064 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, 1, 1, 1, 1, 1, 1] [2018-01-21 06:26:27,064 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 06:26:27,064 INFO L82 PathProgramCache]: Analyzing trace with hash -812324167, now seen corresponding path program 1 times [2018-01-21 06:26:27,064 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:26:27,065 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,065 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:26:27,065 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,065 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:26:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:26:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 06:26:27,121 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 06:26:27,133 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:26:27,143 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:26:27,144 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 06:26:27,161 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 06:26:27,161 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 06:26:27,162 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 06:26:27,162 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 06:26:27,162 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 06:26:27,162 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 06:26:27,162 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 06:26:27,162 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 06:26:27,162 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 06:26:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2018-01-21 06:26:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 06:26:27,166 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:26:27,166 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] [2018-01-21 06:26:27,166 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 06:26:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1381245512, now seen corresponding path program 1 times [2018-01-21 06:26:27,167 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:26:27,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,168 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:26:27,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,168 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:26:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:26:27,175 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:26:27,184 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 06:26:27,184 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:26:27,184 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 06:26:27,184 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:26:27,185 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 06:26:27,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 06:26:27,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 06:26:27,186 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 2 states. [2018-01-21 06:26:27,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:26:27,193 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2018-01-21 06:26:27,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 06:26:27,193 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2018-01-21 06:26:27,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:26:27,195 INFO L225 Difference]: With dead ends: 237 [2018-01-21 06:26:27,195 INFO L226 Difference]: Without dead ends: 118 [2018-01-21 06:26:27,196 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 06:26:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-01-21 06:26:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-01-21 06:26:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-01-21 06:26:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2018-01-21 06:26:27,205 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 21 [2018-01-21 06:26:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:26:27,205 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2018-01-21 06:26:27,205 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 06:26:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2018-01-21 06:26:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-01-21 06:26:27,207 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:26:27,207 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, 1, 1, 1, 1, 1, 1] [2018-01-21 06:26:27,207 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 06:26:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1359124646, now seen corresponding path program 1 times [2018-01-21 06:26:27,207 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:26:27,208 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,209 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:26:27,209 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,209 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:26:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:26:27,221 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:26:27,288 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 06:26:27,289 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:26:27,289 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:26:27,289 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:26:27,290 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:26:27,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:26:27,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:26:27,290 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 5 states. [2018-01-21 06:26:27,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:26:27,418 INFO L93 Difference]: Finished difference Result 276 states and 298 transitions. [2018-01-21 06:26:27,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 06:26:27,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2018-01-21 06:26:27,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:26:27,421 INFO L225 Difference]: With dead ends: 276 [2018-01-21 06:26:27,421 INFO L226 Difference]: Without dead ends: 186 [2018-01-21 06:26:27,422 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 06:26:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-01-21 06:26:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2018-01-21 06:26:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-01-21 06:26:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2018-01-21 06:26:27,431 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 34 [2018-01-21 06:26:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:26:27,432 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2018-01-21 06:26:27,432 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:26:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2018-01-21 06:26:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 06:26:27,434 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:26:27,434 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 06:26:27,436 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 06:26:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash -166833059, now seen corresponding path program 1 times [2018-01-21 06:26:27,437 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:26:27,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,438 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:26:27,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,439 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:26:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:26:27,450 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:26:27,510 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 06:26:27,510 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 06:26:27,510 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 06:26:27,510 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 06:26:27,511 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 06:26:27,511 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 06:26:27,511 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 06:26:27,512 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand 5 states. [2018-01-21 06:26:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 06:26:27,645 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2018-01-21 06:26:27,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 06:26:27,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2018-01-21 06:26:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 06:26:27,647 INFO L225 Difference]: With dead ends: 202 [2018-01-21 06:26:27,647 INFO L226 Difference]: Without dead ends: 177 [2018-01-21 06:26:27,648 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 06:26:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-01-21 06:26:27,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 126. [2018-01-21 06:26:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-01-21 06:26:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2018-01-21 06:26:27,656 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 36 [2018-01-21 06:26:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 06:26:27,657 INFO L432 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2018-01-21 06:26:27,657 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 06:26:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2018-01-21 06:26:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-21 06:26:27,659 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 06:26:27,659 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, 1, 1, 1, 1] [2018-01-21 06:26:27,659 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 06:26:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash -742743919, now seen corresponding path program 1 times [2018-01-21 06:26:27,660 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 06:26:27,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,661 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 06:26:27,661 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 06:26:27,661 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 06:26:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 06:26:27,679 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 06:26:27,826 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 06:26:27,826 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 06:26:27,826 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 06:26:27,827 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 57 with the following transitions: [2018-01-21 06:26:27,828 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [8], [9], [13], [18], [22], [28], [31], [32], [46], [47], [48], [53], [54], [55], [61], [65], [71], [75], [77], [80], [169], [173], [178], [182], [190], [194], [196], [197], [198], [202], [206], [275], [280], [284], [290], [291], [297], [301], [303], [304], [305], [366], [368], [369], [370], [371], [375], [377], [378], [379], [380] [2018-01-21 06:26:27,881 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 06:26:27,882 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown