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/memsafety/20020406-1_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 05:37:50,622 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 05:37:50,624 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 05:37:50,640 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 05:37:50,640 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 05:37:50,641 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 05:37:50,642 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 05:37:50,644 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 05:37:50,646 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 05:37:50,647 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 05:37:50,648 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 05:37:50,648 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 05:37:50,649 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 05:37:50,651 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 05:37:50,652 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 05:37:50,655 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 05:37:50,657 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 05:37:50,659 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 05:37:50,661 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 05:37:50,662 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 05:37:50,664 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 05:37:50,670 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 05:37:50,671 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 05:37:50,671 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 05:37:50,681 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 05:37:50,682 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 05:37:50,683 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 05:37:50,683 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 05:37:50,683 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 05:37:50,683 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 05:37:50,684 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 05:37:50,684 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 05:37:50,685 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 05:37:50,685 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 05:37:50,685 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 05:37:50,685 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 05:37:50,685 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 05:37:50,686 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 05:37:50,686 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 05:37:50,686 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 05:37:50,686 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 05:37:50,686 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 05:37:50,687 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 05:37:50,687 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 05:37:50,687 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 05:37:50,687 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 05:37:50,688 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 05:37:50,688 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 05:37:50,688 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 05:37:50,688 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 05:37:50,688 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 05:37:50,689 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 05:37:50,689 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 05:37:50,689 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 05:37:50,689 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 05:37:50,689 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 05:37:50,690 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 05:37:50,690 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 05:37:50,690 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 05:37:50,690 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 05:37:50,690 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 05:37:50,691 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 05:37:50,692 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 05:37:50,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 05:37:50,735 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 05:37:50,739 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 05:37:50,740 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 05:37:50,740 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 05:37:50,741 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/20020406-1_false-valid-memtrack.i [2018-01-21 05:37:50,970 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 05:37:50,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 05:37:50,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 05:37:50,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 05:37:50,984 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 05:37:50,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:37:50" (1/1) ... [2018-01-21 05:37:50,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb5cd73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:50, skipping insertion in model container [2018-01-21 05:37:50,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 05:37:50" (1/1) ... [2018-01-21 05:37:51,003 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:37:51,056 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 05:37:51,199 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:37:51,230 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 05:37:51,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51 WrapperNode [2018-01-21 05:37:51,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 05:37:51,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 05:37:51,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 05:37:51,246 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 05:37:51,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51" (1/1) ... [2018-01-21 05:37:51,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51" (1/1) ... [2018-01-21 05:37:51,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51" (1/1) ... [2018-01-21 05:37:51,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51" (1/1) ... [2018-01-21 05:37:51,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51" (1/1) ... [2018-01-21 05:37:51,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51" (1/1) ... [2018-01-21 05:37:51,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51" (1/1) ... [2018-01-21 05:37:51,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 05:37:51,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 05:37:51,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 05:37:51,308 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 05:37:51,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51" (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 05:37:51,384 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 05:37:51,385 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 05:37:51,385 INFO L136 BoogieDeclarations]: Found implementation of procedure FFmul [2018-01-21 05:37:51,385 INFO L136 BoogieDeclarations]: Found implementation of procedure DUPFFdeg [2018-01-21 05:37:51,385 INFO L136 BoogieDeclarations]: Found implementation of procedure DUPFFnew [2018-01-21 05:37:51,385 INFO L136 BoogieDeclarations]: Found implementation of procedure DUPFFfree [2018-01-21 05:37:51,385 INFO L136 BoogieDeclarations]: Found implementation of procedure DUPFFswap [2018-01-21 05:37:51,385 INFO L136 BoogieDeclarations]: Found implementation of procedure DUPFFcopy [2018-01-21 05:37:51,385 INFO L136 BoogieDeclarations]: Found implementation of procedure DUPFFshift_add [2018-01-21 05:37:51,386 INFO L136 BoogieDeclarations]: Found implementation of procedure DUPFFexgcd [2018-01-21 05:37:51,386 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 05:37:51,386 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 05:37:51,386 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 05:37:51,386 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 05:37:51,386 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 05:37:51,386 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 05:37:51,386 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 05:37:51,386 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 05:37:51,386 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2018-01-21 05:37:51,387 INFO L136 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2018-01-21 05:37:51,387 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 05:37:51,387 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-21 05:37:51,387 INFO L128 BoogieDeclarations]: Found specification of procedure memset [2018-01-21 05:37:51,387 INFO L128 BoogieDeclarations]: Found specification of procedure FFmul [2018-01-21 05:37:51,387 INFO L128 BoogieDeclarations]: Found specification of procedure DUPFFdeg [2018-01-21 05:37:51,387 INFO L128 BoogieDeclarations]: Found specification of procedure DUPFFnew [2018-01-21 05:37:51,387 INFO L128 BoogieDeclarations]: Found specification of procedure DUPFFfree [2018-01-21 05:37:51,387 INFO L128 BoogieDeclarations]: Found specification of procedure DUPFFswap [2018-01-21 05:37:51,388 INFO L128 BoogieDeclarations]: Found specification of procedure DUPFFcopy [2018-01-21 05:37:51,388 INFO L128 BoogieDeclarations]: Found specification of procedure DUPFFshift_add [2018-01-21 05:37:51,388 INFO L128 BoogieDeclarations]: Found specification of procedure DUPFFexgcd [2018-01-21 05:37:51,388 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 05:37:51,388 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 05:37:51,388 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 05:37:51,987 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 05:37:51,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:37:51 BoogieIcfgContainer [2018-01-21 05:37:51,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 05:37:51,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 05:37:51,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 05:37:51,992 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 05:37:51,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 05:37:50" (1/3) ... [2018-01-21 05:37:51,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d9295c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:37:51, skipping insertion in model container [2018-01-21 05:37:51,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 05:37:51" (2/3) ... [2018-01-21 05:37:51,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d9295c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 05:37:51, skipping insertion in model container [2018-01-21 05:37:51,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 05:37:51" (3/3) ... [2018-01-21 05:37:51,996 INFO L105 eAbstractionObserver]: Analyzing ICFG 20020406-1_false-valid-memtrack.i [2018-01-21 05:37:52,004 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 05:37:52,012 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2018-01-21 05:37:52,058 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 05:37:52,059 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 05:37:52,059 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 05:37:52,059 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 05:37:52,059 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 05:37:52,059 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 05:37:52,060 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 05:37:52,060 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == DUPFFnewErr0EnsuresViolation======== [2018-01-21 05:37:52,061 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 05:37:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states. [2018-01-21 05:37:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 05:37:52,093 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:37:52,095 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 05:37:52,095 INFO L371 AbstractCegarLoop]: === Iteration 1 === [DUPFFnewErr0EnsuresViolation]=== [2018-01-21 05:37:52,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1285108215, now seen corresponding path program 1 times [2018-01-21 05:37:52,101 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:37:52,146 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:37:52,147 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:37:52,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:37:52,147 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:37:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:37:52,223 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:37:52,444 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 05:37:52,445 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:37:52,446 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 05:37:52,446 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:37:52,448 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 05:37:52,460 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 05:37:52,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 05:37:52,462 INFO L87 Difference]: Start difference. First operand 165 states. Second operand 4 states. [2018-01-21 05:37:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:37:52,582 INFO L93 Difference]: Finished difference Result 329 states and 416 transitions. [2018-01-21 05:37:52,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 05:37:52,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-01-21 05:37:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:37:52,595 INFO L225 Difference]: With dead ends: 329 [2018-01-21 05:37:52,595 INFO L226 Difference]: Without dead ends: 103 [2018-01-21 05:37:52,603 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 05:37:52,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-01-21 05:37:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2018-01-21 05:37:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-01-21 05:37:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2018-01-21 05:37:52,655 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 19 [2018-01-21 05:37:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:37:52,655 INFO L432 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2018-01-21 05:37:52,656 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 05:37:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2018-01-21 05:37:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-01-21 05:37:52,658 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:37:52,658 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 05:37:52,658 INFO L371 AbstractCegarLoop]: === Iteration 2 === [DUPFFnewErr0EnsuresViolation]=== [2018-01-21 05:37:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash 824169485, now seen corresponding path program 1 times [2018-01-21 05:37:52,659 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:37:52,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:37:52,660 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:37:52,660 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:37:52,660 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:37:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:37:52,690 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:37:52,790 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 05:37:52,791 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 05:37:52,791 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 05:37:52,791 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 05:37:52,793 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 05:37:52,793 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 05:37:52,793 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-21 05:37:52,794 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand 6 states. [2018-01-21 05:37:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 05:37:52,929 INFO L93 Difference]: Finished difference Result 189 states and 223 transitions. [2018-01-21 05:37:52,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-21 05:37:52,930 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2018-01-21 05:37:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 05:37:52,932 INFO L225 Difference]: With dead ends: 189 [2018-01-21 05:37:52,933 INFO L226 Difference]: Without dead ends: 106 [2018-01-21 05:37:52,934 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-21 05:37:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-01-21 05:37:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-01-21 05:37:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-01-21 05:37:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2018-01-21 05:37:52,944 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 28 [2018-01-21 05:37:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 05:37:52,945 INFO L432 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2018-01-21 05:37:52,945 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 05:37:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2018-01-21 05:37:52,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 05:37:52,945 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 05:37:52,946 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] [2018-01-21 05:37:52,946 INFO L371 AbstractCegarLoop]: === Iteration 3 === [DUPFFnewErr0EnsuresViolation]=== [2018-01-21 05:37:52,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2128486935, now seen corresponding path program 1 times [2018-01-21 05:37:52,946 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 05:37:52,947 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:37:52,947 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 05:37:52,947 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 05:37:52,947 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 05:37:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 05:37:52,981 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 05:37:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 05:37:53,060 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 05:37:53,060 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 05:37:53,061 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 30 with the following transitions: [2018-01-21 05:37:53,063 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [6], [7], [8], [9], [11], [15], [16], [17], [19], [20], [24], [26], [27], [36], [37], [38], [39], [197], [198], [216], [217], [218], [288], [289], [290] [2018-01-21 05:37:53,117 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 05:37:53,117 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