java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 04:10:45,493 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 04:10:45,495 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 04:10:45,510 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 04:10:45,510 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 04:10:45,512 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 04:10:45,513 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 04:10:45,514 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 04:10:45,516 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 04:10:45,517 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 04:10:45,518 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 04:10:45,518 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 04:10:45,519 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 04:10:45,520 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 04:10:45,521 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 04:10:45,522 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 04:10:45,523 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 04:10:45,524 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 04:10:45,526 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 04:10:45,528 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 04:10:45,529 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 04:10:45,530 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 04:10:45,533 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 04:10:45,533 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 04:10:45,533 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 04:10:45,534 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 04:10:45,535 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 04:10:45,536 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 04:10:45,537 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 04:10:45,538 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 04:10:45,538 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 04:10:45,539 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 04:10:45,541 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-27 04:10:45,555 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 04:10:45,556 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 04:10:45,557 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 04:10:45,557 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 04:10:45,557 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 04:10:45,557 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 04:10:45,557 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 04:10:45,558 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 04:10:45,558 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 04:10:45,558 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 04:10:45,558 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 04:10:45,558 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 04:10:45,559 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 04:10:45,559 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 04:10:45,559 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 04:10:45,560 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 04:10:45,560 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 04:10:45,560 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 04:10:45,560 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 04:10:45,560 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 04:10:45,561 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 04:10:45,561 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 04:10:45,561 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 04:10:45,561 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 04:10:45,561 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 04:10:45,562 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 04:10:45,562 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 04:10:45,562 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 04:10:45,562 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 04:10:45,562 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 04:10:45,563 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 04:10:45,563 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 04:10:45,563 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 04:10:45,563 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 04:10:45,605 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 04:10:45,621 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 04:10:45,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 04:10:45,627 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 04:10:45,627 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 04:10:45,628 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call2_true-termination.i [2018-10-27 04:10:45,694 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/63c890f38/5ec484dac03e4436bb39ba5b796206ff/FLAG0bd907e5e [2018-10-27 04:10:46,081 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 04:10:46,082 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call2_true-termination.i [2018-10-27 04:10:46,087 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/63c890f38/5ec484dac03e4436bb39ba5b796206ff/FLAG0bd907e5e [2018-10-27 04:10:46,101 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/63c890f38/5ec484dac03e4436bb39ba5b796206ff [2018-10-27 04:10:46,111 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 04:10:46,113 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 04:10:46,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 04:10:46,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 04:10:46,118 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 04:10:46,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b33a858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46, skipping insertion in model container [2018-10-27 04:10:46,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 04:10:46,153 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 04:10:46,344 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:10:46,348 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 04:10:46,368 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:10:46,389 INFO L193 MainTranslator]: Completed translation [2018-10-27 04:10:46,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46 WrapperNode [2018-10-27 04:10:46,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 04:10:46,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 04:10:46,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 04:10:46,391 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 04:10:46,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 04:10:46,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 04:10:46,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 04:10:46,430 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 04:10:46,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... [2018-10-27 04:10:46,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 04:10:46,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 04:10:46,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 04:10:46,455 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 04:10:46,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 04:10:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 04:10:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 04:10:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 04:10:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 04:10:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 04:10:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 04:10:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-27 04:10:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-27 04:10:46,944 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 04:10:46,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:10:46 BoogieIcfgContainer [2018-10-27 04:10:46,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 04:10:46,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 04:10:46,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 04:10:46,949 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 04:10:46,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:10:46" (1/3) ... [2018-10-27 04:10:46,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6b5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:10:46, skipping insertion in model container [2018-10-27 04:10:46,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:10:46" (2/3) ... [2018-10-27 04:10:46,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6b5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:10:46, skipping insertion in model container [2018-10-27 04:10:46,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:10:46" (3/3) ... [2018-10-27 04:10:46,953 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_true-unreach-call2_true-termination.i [2018-10-27 04:10:46,962 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 04:10:46,970 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 04:10:46,987 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 04:10:47,019 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 04:10:47,020 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 04:10:47,020 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 04:10:47,020 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 04:10:47,020 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 04:10:47,020 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 04:10:47,021 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 04:10:47,021 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 04:10:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2018-10-27 04:10:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-27 04:10:47,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:10:47,044 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:10:47,046 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:10:47,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:10:47,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1193744236, now seen corresponding path program 1 times [2018-10-27 04:10:47,055 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:10:47,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:10:47,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:10:47,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:10:47,106 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:10:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:10:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:10:47,187 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:10:47,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 04:10:47,187 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:10:47,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 04:10:47,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 04:10:47,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 04:10:47,208 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2018-10-27 04:10:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:10:47,228 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2018-10-27 04:10:47,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 04:10:47,229 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-10-27 04:10:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:10:47,237 INFO L225 Difference]: With dead ends: 43 [2018-10-27 04:10:47,237 INFO L226 Difference]: Without dead ends: 21 [2018-10-27 04:10:47,241 INFO L605 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 [2018-10-27 04:10:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-27 04:10:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-27 04:10:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-27 04:10:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-27 04:10:47,282 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2018-10-27 04:10:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:10:47,282 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-27 04:10:47,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 04:10:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-27 04:10:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-27 04:10:47,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:10:47,284 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:10:47,284 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:10:47,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:10:47,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1255135895, now seen corresponding path program 1 times [2018-10-27 04:10:47,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:10:47,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:10:47,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:10:47,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:10:47,286 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:10:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:10:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:10:47,438 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:10:47,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:10:47,439 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:10:47,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:10:47,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:10:47,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:10:47,442 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 3 states. [2018-10-27 04:10:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:10:47,598 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2018-10-27 04:10:47,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:10:47,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-10-27 04:10:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:10:47,603 INFO L225 Difference]: With dead ends: 41 [2018-10-27 04:10:47,603 INFO L226 Difference]: Without dead ends: 29 [2018-10-27 04:10:47,604 INFO L605 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 [2018-10-27 04:10:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-27 04:10:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2018-10-27 04:10:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-27 04:10:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-27 04:10:47,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2018-10-27 04:10:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:10:47,615 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-27 04:10:47,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:10:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-27 04:10:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-27 04:10:47,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:10:47,618 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:10:47,619 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:10:47,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:10:47,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1812131568, now seen corresponding path program 1 times [2018-10-27 04:10:47,620 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:10:47,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:10:47,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:10:47,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:10:47,622 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:10:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:10:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:10:47,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:10:47,783 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:10:47,786 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-10-27 04:10:47,787 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [29], [39], [42], [44], [50], [51], [52], [54] [2018-10-27 04:10:47,832 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 04:10:47,832 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:10:47,991 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 04:10:49,181 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:10:49,182 INFO L272 AbstractInterpreter]: Visited 17 different actions 165 times. Merged at 4 different actions 118 times. Widened at 1 different actions 26 times. Found 29 fixpoints after 2 different actions. Largest state had 31 variables. [2018-10-27 04:10:49,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:10:49,239 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:10:49,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:10:49,239 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 04:10:49,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:10:49,258 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:10:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:10:49,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:10:49,385 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-10-27 04:10:49,388 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-27 04:10:49,389 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-27 04:10:49,406 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-27 04:10:49,476 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-27 04:10:49,476 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2018-10-27 04:10:49,603 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2018-10-27 04:10:49,629 INFO L682 Elim1Store]: detected equality via solver [2018-10-27 04:10:49,631 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2018-10-27 04:10:49,632 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-27 04:10:49,696 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-27 04:10:49,774 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-27 04:10:49,774 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:26, output treesize:9 [2018-10-27 04:10:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:10:49,902 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:10:50,045 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2018-10-27 04:10:50,179 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-27 04:10:50,183 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2018-10-27 04:10:50,189 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-27 04:10:50,193 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-27 04:10:50,202 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-27 04:10:50,202 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:15 [2018-10-27 04:10:51,309 WARN L179 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 12 [2018-10-27 04:10:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:10:51,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:10:51,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 14 [2018-10-27 04:10:51,343 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:10:51,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 04:10:51,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 04:10:51,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2018-10-27 04:10:51,346 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-10-27 04:10:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:10:51,998 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2018-10-27 04:10:51,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 04:10:51,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2018-10-27 04:10:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:10:52,000 INFO L225 Difference]: With dead ends: 53 [2018-10-27 04:10:52,000 INFO L226 Difference]: Without dead ends: 41 [2018-10-27 04:10:52,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2018-10-27 04:10:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-27 04:10:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2018-10-27 04:10:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-27 04:10:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-27 04:10:52,009 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 18 [2018-10-27 04:10:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:10:52,009 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-27 04:10:52,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 04:10:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-27 04:10:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-27 04:10:52,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:10:52,011 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 04:10:52,011 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:10:52,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:10:52,011 INFO L82 PathProgramCache]: Analyzing trace with hash 602547482, now seen corresponding path program 1 times [2018-10-27 04:10:52,011 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:10:52,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:10:52,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:10:52,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:10:52,013 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:10:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:10:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-27 04:10:52,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:10:52,313 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:10:52,313 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-10-27 04:10:52,314 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [29], [31], [33], [39], [42], [44], [47], [49], [50], [51], [52], [54], [55] [2018-10-27 04:10:52,316 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 04:10:52,316 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:10:52,329 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 04:10:53,917 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:10:53,917 INFO L272 AbstractInterpreter]: Visited 22 different actions 500 times. Merged at 9 different actions 268 times. Widened at 2 different actions 52 times. Found 30 fixpoints after 3 different actions. Largest state had 32 variables. [2018-10-27 04:10:53,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:10:53,955 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:10:53,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:10:53,955 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 04:10:53,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:10:53,965 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:10:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:10:54,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:10:54,097 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 14 [2018-10-27 04:10:54,102 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2018-10-27 04:10:54,103 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-27 04:10:54,107 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-27 04:10:54,159 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-27 04:10:54,159 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:48, output treesize:41 [2018-10-27 04:10:54,928 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2018-10-27 04:10:54,932 INFO L682 Elim1Store]: detected equality via solver [2018-10-27 04:10:54,933 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2018-10-27 04:10:54,934 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-27 04:10:57,227 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-27 04:10:57,262 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-27 04:10:57,263 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:57, output treesize:34 [2018-10-27 04:10:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:10:59,402 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:11:01,762 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2018-10-27 04:11:05,906 WARN L179 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2018-10-27 04:11:08,247 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:11:08,248 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:354) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:216) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:435) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 46 more [2018-10-27 04:11:08,253 INFO L168 Benchmark]: Toolchain (without parser) took 22141.32 ms. Allocated memory was 1.5 GB in the beginning and 2.7 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. [2018-10-27 04:11:08,255 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 04:11:08,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-27 04:11:08,256 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.81 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 04:11:08,258 INFO L168 Benchmark]: Boogie Preprocessor took 24.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 04:11:08,258 INFO L168 Benchmark]: RCFGBuilder took 490.64 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-27 04:11:08,264 INFO L168 Benchmark]: TraceAbstraction took 21306.14 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 369.1 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -201.0 MB). Peak memory consumption was 168.1 MB. Max. memory is 7.1 GB. [2018-10-27 04:11:08,271 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.78 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.81 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.94 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 490.64 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.3 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21306.14 ms. Allocated memory was 2.3 GB in the beginning and 2.7 GB in the end (delta: 369.1 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -201.0 MB). Peak memory consumption was 168.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...