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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label26_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 23:45:24,567 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 23:45:24,569 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 23:45:24,587 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 23:45:24,588 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 23:45:24,589 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 23:45:24,590 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 23:45:24,592 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 23:45:24,593 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 23:45:24,594 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 23:45:24,595 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 23:45:24,595 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 23:45:24,596 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 23:45:24,597 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 23:45:24,599 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 23:45:24,599 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 23:45:24,600 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 23:45:24,602 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 23:45:24,604 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 23:45:24,606 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 23:45:24,607 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 23:45:24,608 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 23:45:24,611 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 23:45:24,620 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 23:45:24,644 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 23:45:24,644 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 23:45:24,645 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 23:45:24,645 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 23:45:24,646 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 23:45:24,646 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 23:45:24,646 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 23:45:24,646 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 23:45:24,646 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 23:45:24,647 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 23:45:24,647 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 23:45:24,647 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 23:45:24,647 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 23:45:24,647 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 23:45:24,648 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 23:45:24,649 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 23:45:24,649 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 23:45:24,649 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 23:45:24,649 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 23:45:24,649 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 23:45:24,649 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 23:45:24,650 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 23:45:24,650 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 23:45:24,650 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 23:45:24,650 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 23:45:24,650 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 23:45:24,651 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 23:45:24,653 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 23:45:24,653 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 23:45:24,653 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 23:45:24,653 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 23:45:24,654 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 23:45:24,654 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 23:45:24,654 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 23:45:24,654 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 23:45:24,654 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 23:45:24,719 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 23:45:24,735 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 23:45:24,739 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 23:45:24,741 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 23:45:24,742 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 23:45:24,742 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label26_false-unreach-call.c [2018-10-24 23:45:24,810 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/61199545d/4523066c11e94b77999097d647c6a022/FLAGe7538af70 [2018-10-24 23:45:25,472 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 23:45:25,473 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label26_false-unreach-call.c [2018-10-24 23:45:25,496 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/61199545d/4523066c11e94b77999097d647c6a022/FLAGe7538af70 [2018-10-24 23:45:25,519 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/61199545d/4523066c11e94b77999097d647c6a022 [2018-10-24 23:45:25,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 23:45:25,534 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 23:45:25,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 23:45:25,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 23:45:25,542 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 23:45:25,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:25" (1/1) ... [2018-10-24 23:45:25,547 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 24.10 11:45:25, skipping insertion in model container [2018-10-24 23:45:25,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:25" (1/1) ... [2018-10-24 23:45:25,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 23:45:25,689 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 23:45:26,670 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:45:26,674 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 23:45:27,065 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:45:27,087 INFO L193 MainTranslator]: Completed translation [2018-10-24 23:45:27,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27 WrapperNode [2018-10-24 23:45:27,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 23:45:27,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 23:45:27,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 23:45:27,089 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 23:45:27,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (1/1) ... [2018-10-24 23:45:27,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (1/1) ... [2018-10-24 23:45:27,555 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 23:45:27,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 23:45:27,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 23:45:27,556 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 23:45:27,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (1/1) ... [2018-10-24 23:45:27,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (1/1) ... [2018-10-24 23:45:27,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (1/1) ... [2018-10-24 23:45:27,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (1/1) ... [2018-10-24 23:45:27,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (1/1) ... [2018-10-24 23:45:27,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (1/1) ... [2018-10-24 23:45:27,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (1/1) ... [2018-10-24 23:45:27,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 23:45:27,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 23:45:27,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 23:45:27,885 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 23:45:27,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (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 [2018-10-24 23:45:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 23:45:27,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 23:45:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 23:45:27,958 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 23:45:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 23:45:27,959 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 23:45:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 23:45:27,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 23:45:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 23:45:27,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 23:45:39,347 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 23:45:39,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:39 BoogieIcfgContainer [2018-10-24 23:45:39,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 23:45:39,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 23:45:39,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 23:45:39,353 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 23:45:39,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:45:25" (1/3) ... [2018-10-24 23:45:39,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca7c939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:39, skipping insertion in model container [2018-10-24 23:45:39,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:27" (2/3) ... [2018-10-24 23:45:39,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca7c939 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:39, skipping insertion in model container [2018-10-24 23:45:39,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:39" (3/3) ... [2018-10-24 23:45:39,357 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label26_false-unreach-call.c [2018-10-24 23:45:39,367 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 23:45:39,377 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 23:45:39,395 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 23:45:39,439 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 23:45:39,440 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 23:45:39,440 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 23:45:39,440 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 23:45:39,440 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 23:45:39,441 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 23:45:39,441 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 23:45:39,441 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 23:45:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-24 23:45:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 23:45:39,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:45:39,489 INFO L375 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] [2018-10-24 23:45:39,492 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:45:39,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:45:39,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1567486694, now seen corresponding path program 1 times [2018-10-24 23:45:39,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:45:39,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:39,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:45:39,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:39,556 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:45:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:45:40,007 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 23:45:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:45:40,026 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:45:40,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:45:40,027 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:45:40,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:45:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:45:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:45:40,047 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-24 23:45:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:45:50,934 INFO L93 Difference]: Finished difference Result 2162 states and 4007 transitions. [2018-10-24 23:45:50,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:45:50,935 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2018-10-24 23:45:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:45:50,971 INFO L225 Difference]: With dead ends: 2162 [2018-10-24 23:45:50,971 INFO L226 Difference]: Without dead ends: 1552 [2018-10-24 23:45:50,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:45:51,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2018-10-24 23:45:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1525. [2018-10-24 23:45:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1525 states. [2018-10-24 23:45:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2696 transitions. [2018-10-24 23:45:51,143 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2696 transitions. Word has length 35 [2018-10-24 23:45:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:45:51,143 INFO L481 AbstractCegarLoop]: Abstraction has 1525 states and 2696 transitions. [2018-10-24 23:45:51,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:45:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2696 transitions. [2018-10-24 23:45:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-24 23:45:51,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:45:51,158 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-10-24 23:45:51,158 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:45:51,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:45:51,161 INFO L82 PathProgramCache]: Analyzing trace with hash -621481607, now seen corresponding path program 1 times [2018-10-24 23:45:51,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:45:51,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:51,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:45:51,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:51,163 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:45:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:45:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:45:51,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:45:51,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:45:51,491 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:45:51,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:45:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:45:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:45:51,494 INFO L87 Difference]: Start difference. First operand 1525 states and 2696 transitions. Second operand 6 states. [2018-10-24 23:46:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:46:10,132 INFO L93 Difference]: Finished difference Result 5786 states and 10682 transitions. [2018-10-24 23:46:10,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:46:10,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2018-10-24 23:46:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:46:10,169 INFO L225 Difference]: With dead ends: 5786 [2018-10-24 23:46:10,169 INFO L226 Difference]: Without dead ends: 4267 [2018-10-24 23:46:10,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 23:46:10,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2018-10-24 23:46:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 4243. [2018-10-24 23:46:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4243 states. [2018-10-24 23:46:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4243 states to 4243 states and 6361 transitions. [2018-10-24 23:46:10,331 INFO L78 Accepts]: Start accepts. Automaton has 4243 states and 6361 transitions. Word has length 114 [2018-10-24 23:46:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:46:10,331 INFO L481 AbstractCegarLoop]: Abstraction has 4243 states and 6361 transitions. [2018-10-24 23:46:10,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:46:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4243 states and 6361 transitions. [2018-10-24 23:46:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-24 23:46:10,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:46:10,346 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-10-24 23:46:10,347 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:46:10,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:10,347 INFO L82 PathProgramCache]: Analyzing trace with hash 685304039, now seen corresponding path program 1 times [2018-10-24 23:46:10,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:46:10,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:10,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:10,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:10,352 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:46:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:46:10,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:46:10,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:46:10,578 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:46:10,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:46:10,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:46:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:46:10,580 INFO L87 Difference]: Start difference. First operand 4243 states and 6361 transitions. Second operand 6 states. [2018-10-24 23:46:17,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:46:17,582 INFO L93 Difference]: Finished difference Result 12712 states and 20702 transitions. [2018-10-24 23:46:17,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:46:17,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2018-10-24 23:46:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:46:17,651 INFO L225 Difference]: With dead ends: 12712 [2018-10-24 23:46:17,652 INFO L226 Difference]: Without dead ends: 8475 [2018-10-24 23:46:17,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 23:46:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8475 states. [2018-10-24 23:46:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8475 to 8390. [2018-10-24 23:46:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8390 states. [2018-10-24 23:46:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 12580 transitions. [2018-10-24 23:46:17,938 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 12580 transitions. Word has length 115 [2018-10-24 23:46:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:46:17,938 INFO L481 AbstractCegarLoop]: Abstraction has 8390 states and 12580 transitions. [2018-10-24 23:46:17,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:46:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 12580 transitions. [2018-10-24 23:46:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-24 23:46:17,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:46:17,944 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:46:17,944 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:46:17,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash 184143630, now seen corresponding path program 1 times [2018-10-24 23:46:17,944 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:46:17,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:17,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:17,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:17,946 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:46:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:18,209 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:46:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 57 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-24 23:46:18,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:46:18,476 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:46:18,477 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 190 with the following transitions: [2018-10-24 23:46:18,479 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [890], [892], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1239], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:46:18,526 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:46:18,527 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:46:20,303 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:46:20,305 INFO L272 AbstractInterpreter]: Visited 88 different actions 250 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 23:46:20,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:20,342 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:46:20,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:46:20,342 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 [2018-10-24 23:46:20,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:20,358 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:46:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:20,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:46:20,735 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2018-10-24 23:46:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:46:21,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:46:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:46:22,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:46:22,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-24 23:46:22,086 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:46:22,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 23:46:22,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 23:46:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-24 23:46:22,092 INFO L87 Difference]: Start difference. First operand 8390 states and 12580 transitions. Second operand 9 states. [2018-10-24 23:46:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:46:31,463 INFO L93 Difference]: Finished difference Result 20874 states and 31687 transitions. [2018-10-24 23:46:31,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 23:46:31,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 189 [2018-10-24 23:46:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:46:31,577 INFO L225 Difference]: With dead ends: 20874 [2018-10-24 23:46:31,578 INFO L226 Difference]: Without dead ends: 12455 [2018-10-24 23:46:31,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 376 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2018-10-24 23:46:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12455 states. [2018-10-24 23:46:31,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12455 to 12430. [2018-10-24 23:46:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12430 states. [2018-10-24 23:46:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12430 states to 12430 states and 15970 transitions. [2018-10-24 23:46:32,024 INFO L78 Accepts]: Start accepts. Automaton has 12430 states and 15970 transitions. Word has length 189 [2018-10-24 23:46:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:46:32,025 INFO L481 AbstractCegarLoop]: Abstraction has 12430 states and 15970 transitions. [2018-10-24 23:46:32,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 23:46:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 12430 states and 15970 transitions. [2018-10-24 23:46:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-24 23:46:32,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:46:32,030 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:46:32,030 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:46:32,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:32,031 INFO L82 PathProgramCache]: Analyzing trace with hash 354767048, now seen corresponding path program 1 times [2018-10-24 23:46:32,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:46:32,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:32,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:32,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:32,032 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:46:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:32,337 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:46:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 92 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 23:46:33,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:46:33,314 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:46:33,314 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 203 with the following transitions: [2018-10-24 23:46:33,315 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [890], [892], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:46:33,322 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:46:33,322 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:46:33,968 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:46:33,969 INFO L272 AbstractInterpreter]: Visited 97 different actions 293 times. Merged at 7 different actions 25 times. Widened at 1 different actions 1 times. Found 3 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 23:46:34,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:34,020 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:46:34,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:46:34,020 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 [2018-10-24 23:46:34,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:34,031 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:46:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:34,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:46:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:46:34,322 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:46:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:46:34,845 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 23:46:34,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-24 23:46:34,846 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:46:34,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:46:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:46:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:46:34,847 INFO L87 Difference]: Start difference. First operand 12430 states and 15970 transitions. Second operand 3 states. [2018-10-24 23:46:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:46:39,031 INFO L93 Difference]: Finished difference Result 24854 states and 31934 transitions. [2018-10-24 23:46:39,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:46:39,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2018-10-24 23:46:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:46:39,091 INFO L225 Difference]: With dead ends: 24854 [2018-10-24 23:46:39,092 INFO L226 Difference]: Without dead ends: 12430 [2018-10-24 23:46:39,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 404 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:46:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12430 states. [2018-10-24 23:46:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12430 to 12430. [2018-10-24 23:46:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12430 states. [2018-10-24 23:46:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12430 states to 12430 states and 15348 transitions. [2018-10-24 23:46:39,421 INFO L78 Accepts]: Start accepts. Automaton has 12430 states and 15348 transitions. Word has length 202 [2018-10-24 23:46:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:46:39,422 INFO L481 AbstractCegarLoop]: Abstraction has 12430 states and 15348 transitions. [2018-10-24 23:46:39,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:46:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 12430 states and 15348 transitions. [2018-10-24 23:46:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-24 23:46:39,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:46:39,431 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:46:39,431 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:46:39,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:39,432 INFO L82 PathProgramCache]: Analyzing trace with hash 146048275, now seen corresponding path program 1 times [2018-10-24 23:46:39,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:46:39,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:39,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:39,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:39,433 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:46:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:46:40,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:46:40,028 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:46:40,028 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 280 with the following transitions: [2018-10-24 23:46:40,028 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [890], [892], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:46:40,036 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:46:40,037 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:46:40,340 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:46:40,340 INFO L272 AbstractInterpreter]: Visited 98 different actions 197 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 23:46:40,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:40,377 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:46:40,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:46:40,378 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:46:40,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:40,645 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:46:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:40,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:46:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:46:40,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:46:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 23:46:42,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:46:42,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-10-24 23:46:42,091 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:46:42,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 23:46:42,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 23:46:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-24 23:46:42,092 INFO L87 Difference]: Start difference. First operand 12430 states and 15348 transitions. Second operand 7 states. [2018-10-24 23:46:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:46:54,645 INFO L93 Difference]: Finished difference Result 37383 states and 46743 transitions. [2018-10-24 23:46:54,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 23:46:54,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 279 [2018-10-24 23:46:54,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:46:54,754 INFO L225 Difference]: With dead ends: 37383 [2018-10-24 23:46:54,754 INFO L226 Difference]: Without dead ends: 24925 [2018-10-24 23:46:54,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 560 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-24 23:46:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24925 states. [2018-10-24 23:46:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24925 to 22763. [2018-10-24 23:46:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22763 states. [2018-10-24 23:46:55,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22763 states to 22763 states and 27204 transitions. [2018-10-24 23:46:55,374 INFO L78 Accepts]: Start accepts. Automaton has 22763 states and 27204 transitions. Word has length 279 [2018-10-24 23:46:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:46:55,374 INFO L481 AbstractCegarLoop]: Abstraction has 22763 states and 27204 transitions. [2018-10-24 23:46:55,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 23:46:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 22763 states and 27204 transitions. [2018-10-24 23:46:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-10-24 23:46:55,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:46:55,393 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-10-24 23:46:55,393 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:46:55,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash 999506532, now seen corresponding path program 1 times [2018-10-24 23:46:55,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:46:55,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:55,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:55,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:46:55,395 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:46:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 94 proven. 146 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-24 23:46:56,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:46:56,590 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:46:56,590 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 326 with the following transitions: [2018-10-24 23:46:56,590 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [890], [892], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1443], [1448], [1450], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:46:56,595 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:46:56,596 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:46:56,946 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:46:56,946 INFO L272 AbstractInterpreter]: Visited 135 different actions 269 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 23:46:56,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:46:56,988 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:46:56,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:46:56,989 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:46:57,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:46:57,002 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:46:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:46:57,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:46:57,563 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-10-24 23:46:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 214 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-10-24 23:46:57,794 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:46:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 94 proven. 227 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 23:47:00,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:47:00,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2018-10-24 23:47:00,005 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:47:00,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 23:47:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 23:47:00,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-10-24 23:47:00,007 INFO L87 Difference]: Start difference. First operand 22763 states and 27204 transitions. Second operand 10 states. [2018-10-24 23:47:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:47:24,624 INFO L93 Difference]: Finished difference Result 73646 states and 95862 transitions. [2018-10-24 23:47:24,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 23:47:24,625 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 325 [2018-10-24 23:47:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:47:24,825 INFO L225 Difference]: With dead ends: 73646 [2018-10-24 23:47:24,825 INFO L226 Difference]: Without dead ends: 46993 [2018-10-24 23:47:24,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 655 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2018-10-24 23:47:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46993 states. [2018-10-24 23:47:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46993 to 39241. [2018-10-24 23:47:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39241 states. [2018-10-24 23:47:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39241 states to 39241 states and 48159 transitions. [2018-10-24 23:47:25,924 INFO L78 Accepts]: Start accepts. Automaton has 39241 states and 48159 transitions. Word has length 325 [2018-10-24 23:47:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:47:25,925 INFO L481 AbstractCegarLoop]: Abstraction has 39241 states and 48159 transitions. [2018-10-24 23:47:25,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 23:47:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 39241 states and 48159 transitions. [2018-10-24 23:47:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-24 23:47:25,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:25,943 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 23:47:25,944 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:25,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1019419516, now seen corresponding path program 1 times [2018-10-24 23:47:25,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:25,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:25,946 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 96 proven. 269 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 23:47:26,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:26,879 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:47:26,879 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 363 with the following transitions: [2018-10-24 23:47:26,879 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [890], [892], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1474], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:47:26,883 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:47:26,884 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:47:27,482 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:47:27,482 INFO L272 AbstractInterpreter]: Visited 139 different actions 279 times. Merged at 8 different actions 13 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 23:47:27,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:27,524 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:47:27,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:27,524 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-24 23:47:27,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:27,540 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:47:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:27,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:47:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 339 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-10-24 23:47:28,520 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:47:29,548 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-10-24 23:47:29,586 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-10-24 23:47:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 90 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-24 23:47:30,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:47:30,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2018-10-24 23:47:30,373 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:47:30,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 23:47:30,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 23:47:30,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-10-24 23:47:30,375 INFO L87 Difference]: Start difference. First operand 39241 states and 48159 transitions. Second operand 15 states. Received shutdown request... [2018-10-24 23:49:35,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-24 23:49:35,027 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 23:49:35,034 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 23:49:35,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:49:35 BoogieIcfgContainer [2018-10-24 23:49:35,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 23:49:35,036 INFO L168 Benchmark]: Toolchain (without parser) took 249503.31 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -867.8 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-24 23:49:35,037 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-10-24 23:49:35,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1553.38 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:35,038 INFO L168 Benchmark]: Boogie Procedure Inliner took 466.69 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -933.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:35,039 INFO L168 Benchmark]: Boogie Preprocessor took 328.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:35,040 INFO L168 Benchmark]: RCFGBuilder took 11463.58 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 478.2 MB). Peak memory consumption was 478.2 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:35,041 INFO L168 Benchmark]: TraceAbstraction took 235685.90 ms. Allocated memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: 1.3 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -577.7 MB). Peak memory consumption was 737.7 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:35,046 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 1553.38 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 466.69 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.3 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -933.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 328.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 11463.58 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 478.2 MB). Peak memory consumption was 478.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235685.90 ms. Allocated memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: 1.3 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -577.7 MB). Peak memory consumption was 737.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 92). Cancelled while BasicCegarLoop was constructing difference of abstraction (39241states) and FLOYD_HOARE automaton (currently 45 states, 15 states before enhancement),while ReachableStatesComputation was computing reachable states (21818 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 235.6s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 212.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2174 SDtfs, 19985 SDslu, 3108 SDs, 0 SdLazy, 36817 SolverSat, 8482 SolverUnsat, 54 SolverUnknown, 0 SolverNotchecked, 197.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2898 GetRequests, 2753 SyntacticMatches, 15 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39241occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.9s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 7 MinimizatonAttempts, 10075 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 13.0s InterpolantComputationTime, 2978 NumberOfCodeBlocks, 2978 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 4317 ConstructedInterpolants, 191 QuantifiedInterpolants, 6557064 SizeOfPredicates, 9 NumberOfNonLiveVariables, 2447 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 2921/3893 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown