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_label40_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 23:47:34,265 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 23:47:34,267 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 23:47:34,285 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 23:47:34,286 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 23:47:34,287 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 23:47:34,289 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 23:47:34,291 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 23:47:34,294 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 23:47:34,296 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 23:47:34,297 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 23:47:34,297 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 23:47:34,298 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 23:47:34,302 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 23:47:34,303 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 23:47:34,304 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 23:47:34,311 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 23:47:34,314 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 23:47:34,317 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 23:47:34,320 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 23:47:34,321 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 23:47:34,322 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 23:47:34,325 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 23:47:34,334 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 23:47:34,360 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 23:47:34,361 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 23:47:34,362 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 23:47:34,362 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 23:47:34,362 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 23:47:34,362 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 23:47:34,362 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 23:47:34,363 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 23:47:34,363 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 23:47:34,363 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 23:47:34,363 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 23:47:34,363 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 23:47:34,364 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 23:47:34,364 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 23:47:34,364 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 23:47:34,365 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 23:47:34,365 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 23:47:34,365 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 23:47:34,365 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 23:47:34,365 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 23:47:34,366 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 23:47:34,366 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 23:47:34,366 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 23:47:34,366 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 23:47:34,366 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 23:47:34,367 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 23:47:34,367 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 23:47:34,367 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 23:47:34,367 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 23:47:34,367 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 23:47:34,368 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 23:47:34,368 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 23:47:34,368 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 23:47:34,368 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 23:47:34,368 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 23:47:34,369 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 23:47:34,434 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 23:47:34,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 23:47:34,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 23:47:34,460 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 23:47:34,460 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 23:47:34,462 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label40_false-unreach-call.c [2018-10-24 23:47:34,523 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/48d528aa8/e8e7cf1bc28049e7b4ee6d6dbe176241/FLAG8ceae28fe [2018-10-24 23:47:35,175 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 23:47:35,176 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label40_false-unreach-call.c [2018-10-24 23:47:35,206 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/48d528aa8/e8e7cf1bc28049e7b4ee6d6dbe176241/FLAG8ceae28fe [2018-10-24 23:47:35,225 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/48d528aa8/e8e7cf1bc28049e7b4ee6d6dbe176241 [2018-10-24 23:47:35,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 23:47:35,239 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 23:47:35,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 23:47:35,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 23:47:35,244 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 23:47:35,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:47:35" (1/1) ... [2018-10-24 23:47:35,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46764b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:35, skipping insertion in model container [2018-10-24 23:47:35,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:47:35" (1/1) ... [2018-10-24 23:47:35,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 23:47:35,370 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 23:47:36,483 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:47:36,488 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 23:47:36,907 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:47:36,933 INFO L193 MainTranslator]: Completed translation [2018-10-24 23:47:36,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36 WrapperNode [2018-10-24 23:47:36,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 23:47:36,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 23:47:36,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 23:47:36,935 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 23:47:36,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (1/1) ... [2018-10-24 23:47:37,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (1/1) ... [2018-10-24 23:47:37,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 23:47:37,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 23:47:37,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 23:47:37,467 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 23:47:37,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (1/1) ... [2018-10-24 23:47:37,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (1/1) ... [2018-10-24 23:47:37,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (1/1) ... [2018-10-24 23:47:37,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (1/1) ... [2018-10-24 23:47:37,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (1/1) ... [2018-10-24 23:47:37,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (1/1) ... [2018-10-24 23:47:37,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (1/1) ... [2018-10-24 23:47:37,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 23:47:37,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 23:47:37,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 23:47:37,774 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 23:47:37,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (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 23:47:37,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 23:47:37,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 23:47:37,844 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 23:47:37,844 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 23:47:37,844 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 23:47:37,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 23:47:37,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 23:47:37,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 23:47:37,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 23:47:37,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 23:47:50,989 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 23:47:50,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:47:50 BoogieIcfgContainer [2018-10-24 23:47:50,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 23:47:50,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 23:47:50,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 23:47:50,995 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 23:47:50,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:47:35" (1/3) ... [2018-10-24 23:47:50,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d91924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:47:50, skipping insertion in model container [2018-10-24 23:47:50,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:47:36" (2/3) ... [2018-10-24 23:47:50,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d91924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:47:50, skipping insertion in model container [2018-10-24 23:47:50,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:47:50" (3/3) ... [2018-10-24 23:47:50,999 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label40_false-unreach-call.c [2018-10-24 23:47:51,010 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 23:47:51,024 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 23:47:51,042 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 23:47:51,090 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 23:47:51,090 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 23:47:51,090 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 23:47:51,090 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 23:47:51,090 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 23:47:51,091 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 23:47:51,091 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 23:47:51,091 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 23:47:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-24 23:47:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-24 23:47:51,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:51,137 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] [2018-10-24 23:47:51,140 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:51,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1682620046, now seen corresponding path program 1 times [2018-10-24 23:47:51,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:51,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:51,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:51,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:51,211 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:51,629 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 23:47:51,632 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:47:51,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:47:51,633 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:47:51,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:47:51,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:47:51,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:47:51,659 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-24 23:48:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:48:01,741 INFO L93 Difference]: Finished difference Result 2125 states and 3954 transitions. [2018-10-24 23:48:01,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:48:01,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-10-24 23:48:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:48:01,779 INFO L225 Difference]: With dead ends: 2125 [2018-10-24 23:48:01,779 INFO L226 Difference]: Without dead ends: 1515 [2018-10-24 23:48:01,789 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 23:48:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2018-10-24 23:48:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1043. [2018-10-24 23:48:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1043 states. [2018-10-24 23:48:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1647 transitions. [2018-10-24 23:48:01,924 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1647 transitions. Word has length 29 [2018-10-24 23:48:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:48:01,925 INFO L481 AbstractCegarLoop]: Abstraction has 1043 states and 1647 transitions. [2018-10-24 23:48:01,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:48:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1647 transitions. [2018-10-24 23:48:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-24 23:48:01,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:48:01,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:48:01,932 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:48:01,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1607791969, now seen corresponding path program 1 times [2018-10-24 23:48:01,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:48:01,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:01,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:01,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:01,935 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:48:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:48:02,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:48:02,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 23:48:02,306 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:48:02,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 23:48:02,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 23:48:02,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 23:48:02,309 INFO L87 Difference]: Start difference. First operand 1043 states and 1647 transitions. Second operand 5 states. [2018-10-24 23:48:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:48:13,401 INFO L93 Difference]: Finished difference Result 3017 states and 4847 transitions. [2018-10-24 23:48:13,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:48:13,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2018-10-24 23:48:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:48:13,419 INFO L225 Difference]: With dead ends: 3017 [2018-10-24 23:48:13,419 INFO L226 Difference]: Without dead ends: 1980 [2018-10-24 23:48:13,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:48:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2018-10-24 23:48:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1954. [2018-10-24 23:48:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2018-10-24 23:48:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2892 transitions. [2018-10-24 23:48:13,521 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2892 transitions. Word has length 101 [2018-10-24 23:48:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:48:13,522 INFO L481 AbstractCegarLoop]: Abstraction has 1954 states and 2892 transitions. [2018-10-24 23:48:13,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 23:48:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2892 transitions. [2018-10-24 23:48:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-24 23:48:13,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:48:13,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:48:13,532 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:48:13,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:13,535 INFO L82 PathProgramCache]: Analyzing trace with hash 221393273, now seen corresponding path program 1 times [2018-10-24 23:48:13,536 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:48:13,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:13,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:13,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:13,539 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:48:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:48:13,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:13,845 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:48:13,846 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 105 with the following transitions: [2018-10-24 23:48:13,848 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [842], [844], [847], [855], [863], [871], [879], [887], [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], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:48:13,908 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:48:13,909 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:48:15,669 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:48:15,671 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 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 23:48:15,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:15,717 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:48:15,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:15,718 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 23:48:15,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:15,732 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:48:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:15,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:48:40,018 WARN L179 SmtUtils]: Spent 21.70 s on a formula simplification. DAG size of input: 135 DAG size of output: 83 [2018-10-24 23:49:00,330 WARN L179 SmtUtils]: Spent 16.09 s on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2018-10-24 23:49:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:49:00,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:49:03,306 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-24 23:49:05,817 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-24 23:49:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:49:06,167 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-24 23:49:06,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-24 23:49:06,168 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:49:06,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:49:06,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:49:06,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=161, Unknown=4, NotChecked=0, Total=210 [2018-10-24 23:49:06,170 INFO L87 Difference]: Start difference. First operand 1954 states and 2892 transitions. Second operand 6 states. [2018-10-24 23:50:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:50:04,254 INFO L93 Difference]: Finished difference Result 7545 states and 11559 transitions. [2018-10-24 23:50:04,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 23:50:04,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2018-10-24 23:50:04,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:50:04,298 INFO L225 Difference]: With dead ends: 7545 [2018-10-24 23:50:04,298 INFO L226 Difference]: Without dead ends: 5597 [2018-10-24 23:50:04,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=45, Invalid=161, Unknown=4, NotChecked=0, Total=210 [2018-10-24 23:50:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2018-10-24 23:50:04,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5555. [2018-10-24 23:50:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5555 states. [2018-10-24 23:50:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5555 states to 5555 states and 8056 transitions. [2018-10-24 23:50:04,472 INFO L78 Accepts]: Start accepts. Automaton has 5555 states and 8056 transitions. Word has length 104 [2018-10-24 23:50:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:50:04,472 INFO L481 AbstractCegarLoop]: Abstraction has 5555 states and 8056 transitions. [2018-10-24 23:50:04,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:50:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5555 states and 8056 transitions. [2018-10-24 23:50:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-24 23:50:04,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:50:04,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:04,476 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:50:04,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:04,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1900453457, now seen corresponding path program 1 times [2018-10-24 23:50:04,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:50:04,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:04,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:04,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:04,478 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:50:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:50:04,685 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:50:04,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:50:04,686 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:50:04,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:50:04,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:50:04,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:50:04,687 INFO L87 Difference]: Start difference. First operand 5555 states and 8056 transitions. Second operand 6 states. [2018-10-24 23:50:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:50:14,420 INFO L93 Difference]: Finished difference Result 14312 states and 21443 transitions. [2018-10-24 23:50:14,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:50:14,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2018-10-24 23:50:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:50:14,472 INFO L225 Difference]: With dead ends: 14312 [2018-10-24 23:50:14,472 INFO L226 Difference]: Without dead ends: 8763 [2018-10-24 23:50:14,506 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 23:50:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8763 states. [2018-10-24 23:50:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8763 to 8700. [2018-10-24 23:50:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8700 states. [2018-10-24 23:50:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8700 states to 8700 states and 11562 transitions. [2018-10-24 23:50:14,746 INFO L78 Accepts]: Start accepts. Automaton has 8700 states and 11562 transitions. Word has length 109 [2018-10-24 23:50:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:50:14,746 INFO L481 AbstractCegarLoop]: Abstraction has 8700 states and 11562 transitions. [2018-10-24 23:50:14,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:50:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8700 states and 11562 transitions. [2018-10-24 23:50:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-24 23:50:14,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:50:14,753 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, 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, 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] [2018-10-24 23:50:14,754 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:50:14,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1496008104, now seen corresponding path program 1 times [2018-10-24 23:50:14,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:50:14,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:14,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:14,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:14,756 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:50:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-24 23:50:14,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:50:15,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 23:50:15,000 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:50:15,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:50:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:50:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:50:15,001 INFO L87 Difference]: Start difference. First operand 8700 states and 11562 transitions. Second operand 3 states. [2018-10-24 23:50:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:50:20,505 INFO L93 Difference]: Finished difference Result 23104 states and 31093 transitions. [2018-10-24 23:50:20,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:50:20,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2018-10-24 23:50:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:50:20,590 INFO L225 Difference]: With dead ends: 23104 [2018-10-24 23:50:20,590 INFO L226 Difference]: Without dead ends: 14410 [2018-10-24 23:50:20,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 23:50:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14410 states. [2018-10-24 23:50:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14410 to 14409. [2018-10-24 23:50:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14409 states. [2018-10-24 23:50:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14409 states to 14409 states and 18090 transitions. [2018-10-24 23:50:21,234 INFO L78 Accepts]: Start accepts. Automaton has 14409 states and 18090 transitions. Word has length 193 [2018-10-24 23:50:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:50:21,234 INFO L481 AbstractCegarLoop]: Abstraction has 14409 states and 18090 transitions. [2018-10-24 23:50:21,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:50:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 14409 states and 18090 transitions. [2018-10-24 23:50:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-24 23:50:21,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:50:21,241 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, 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, 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] [2018-10-24 23:50:21,241 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:50:21,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:21,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1623818265, now seen corresponding path program 1 times [2018-10-24 23:50:21,242 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:50:21,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:21,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:21,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:21,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:50:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:50:21,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:50:21,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:50:21,550 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:50:21,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:50:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:50:21,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:50:21,551 INFO L87 Difference]: Start difference. First operand 14409 states and 18090 transitions. Second operand 4 states. [2018-10-24 23:50:29,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:50:29,277 INFO L93 Difference]: Finished difference Result 41586 states and 54906 transitions. [2018-10-24 23:50:29,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:50:29,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 204 [2018-10-24 23:50:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:50:29,426 INFO L225 Difference]: With dead ends: 41586 [2018-10-24 23:50:29,426 INFO L226 Difference]: Without dead ends: 27617 [2018-10-24 23:50:29,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 23:50:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27617 states. [2018-10-24 23:50:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27617 to 27615. [2018-10-24 23:50:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27615 states. [2018-10-24 23:50:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27615 states to 27615 states and 33845 transitions. [2018-10-24 23:50:30,153 INFO L78 Accepts]: Start accepts. Automaton has 27615 states and 33845 transitions. Word has length 204 [2018-10-24 23:50:30,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:50:30,153 INFO L481 AbstractCegarLoop]: Abstraction has 27615 states and 33845 transitions. [2018-10-24 23:50:30,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:50:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 27615 states and 33845 transitions. [2018-10-24 23:50:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-24 23:50:30,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:50:30,164 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, 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, 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] [2018-10-24 23:50:30,164 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:50:30,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:30,164 INFO L82 PathProgramCache]: Analyzing trace with hash -430136309, now seen corresponding path program 1 times [2018-10-24 23:50:30,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:50:30,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:30,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:30,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:50:30,166 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:50:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 23:50:31,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:50:31,123 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:50:31,123 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2018-10-24 23:50:31,124 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [842], [844], [847], [855], [863], [871], [879], [887], [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], [1286], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:50:31,131 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:50:31,131 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:50:31,452 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:50:31,452 INFO L272 AbstractInterpreter]: Visited 98 different actions 195 times. Merged at 7 different actions 11 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-24 23:50:31,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:50:31,488 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:50:31,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:50:31,488 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 23:50:31,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:50:31,499 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:50:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:50:31,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:50:31,995 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-10-24 23:50:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 23:50:32,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:50:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 49 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:50:32,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:50:32,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-10-24 23:50:32,938 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:50:32,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 23:50:32,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 23:50:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-10-24 23:50:32,939 INFO L87 Difference]: Start difference. First operand 27615 states and 33845 transitions. Second operand 10 states. [2018-10-24 23:51:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:51:21,135 INFO L93 Difference]: Finished difference Result 88334 states and 115133 transitions. [2018-10-24 23:51:21,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 23:51:21,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 206 [2018-10-24 23:51:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:51:21,432 INFO L225 Difference]: With dead ends: 88334 [2018-10-24 23:51:21,433 INFO L226 Difference]: Without dead ends: 61159 [2018-10-24 23:51:21,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2018-10-24 23:51:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61159 states. [2018-10-24 23:51:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61159 to 58174. [2018-10-24 23:51:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58174 states. [2018-10-24 23:51:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58174 states to 58174 states and 72509 transitions. [2018-10-24 23:51:23,405 INFO L78 Accepts]: Start accepts. Automaton has 58174 states and 72509 transitions. Word has length 206 [2018-10-24 23:51:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:51:23,405 INFO L481 AbstractCegarLoop]: Abstraction has 58174 states and 72509 transitions. [2018-10-24 23:51:23,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 23:51:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 58174 states and 72509 transitions. [2018-10-24 23:51:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-24 23:51:23,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:51:23,417 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, 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, 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] [2018-10-24 23:51:23,417 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:51:23,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1303885603, now seen corresponding path program 1 times [2018-10-24 23:51:23,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:51:23,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:23,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:23,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:23,419 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:51:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:23,708 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:51:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 39 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:51:24,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:51:24,541 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:51:24,541 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 215 with the following transitions: [2018-10-24 23:51:24,542 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [842], [844], [847], [855], [863], [871], [879], [887], [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], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:51:24,549 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:51:24,550 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:51:25,783 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:51:25,784 INFO L272 AbstractInterpreter]: Visited 119 different actions 343 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 23:51:25,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:25,821 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:51:25,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:51:25,822 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 23:51:25,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:25,836 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:51:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:25,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:51:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-24 23:51:26,112 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:51:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-10-24 23:51:26,203 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 23:51:26,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-10-24 23:51:26,203 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:51:26,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:51:26,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:51:26,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-10-24 23:51:26,204 INFO L87 Difference]: Start difference. First operand 58174 states and 72509 transitions. Second operand 3 states. [2018-10-24 23:51:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:51:31,256 INFO L93 Difference]: Finished difference Result 115908 states and 144762 transitions. [2018-10-24 23:51:31,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:51:31,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 214 [2018-10-24 23:51:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:51:31,418 INFO L225 Difference]: With dead ends: 115908 [2018-10-24 23:51:31,418 INFO L226 Difference]: Without dead ends: 58174 [2018-10-24 23:51:31,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 428 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-10-24 23:51:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58174 states. [2018-10-24 23:51:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58174 to 55122. [2018-10-24 23:51:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55122 states. [2018-10-24 23:51:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55122 states to 55122 states and 66316 transitions. [2018-10-24 23:51:32,677 INFO L78 Accepts]: Start accepts. Automaton has 55122 states and 66316 transitions. Word has length 214 [2018-10-24 23:51:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:51:32,678 INFO L481 AbstractCegarLoop]: Abstraction has 55122 states and 66316 transitions. [2018-10-24 23:51:32,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:51:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 55122 states and 66316 transitions. [2018-10-24 23:51:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-24 23:51:32,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:51:32,694 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:51:32,694 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:51:32,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash 680469805, now seen corresponding path program 1 times [2018-10-24 23:51:32,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:51:32,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:32,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:32,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:51:32,696 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:51:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:33,454 WARN L179 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2018-10-24 23:51:33,719 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 23:51:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 68 proven. 19 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2018-10-24 23:51:33,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:51:33,953 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:51:33,954 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 304 with the following transitions: [2018-10-24 23:51:33,954 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [842], [844], [847], [855], [863], [871], [879], [887], [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], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1286], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:51:33,958 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:51:33,958 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:51:35,811 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:51:35,812 INFO L272 AbstractInterpreter]: Visited 120 different actions 346 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 23:51:35,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:51:35,837 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:51:35,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:51:35,838 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 23:51:35,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:51:35,849 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:51:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:51:35,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:51:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 280 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-24 23:51:36,164 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:51:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 144 proven. 88 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-10-24 23:51:36,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:51:36,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2018-10-24 23:51:36,558 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:51:36,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 23:51:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 23:51:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-10-24 23:51:36,560 INFO L87 Difference]: Start difference. First operand 55122 states and 66316 transitions. Second operand 12 states. Received shutdown request... [2018-10-24 23:51:41,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 23:51:41,546 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 23:51:41,553 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 23:51:41,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:51:41 BoogieIcfgContainer [2018-10-24 23:51:41,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 23:51:41,554 INFO L168 Benchmark]: Toolchain (without parser) took 246316.37 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 1.5 GB in the end (delta: -104.2 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-10-24 23:51:41,555 INFO L168 Benchmark]: CDTParser took 0.25 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. [2018-10-24 23:51:41,556 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1693.74 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 23:51:41,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 532.24 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 737.7 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -881.3 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. [2018-10-24 23:51:41,558 INFO L168 Benchmark]: Boogie Preprocessor took 306.08 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 30.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2018-10-24 23:51:41,558 INFO L168 Benchmark]: RCFGBuilder took 13216.76 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 457.8 MB). Peak memory consumption was 457.8 MB. Max. memory is 7.1 GB. [2018-10-24 23:51:41,559 INFO L168 Benchmark]: TraceAbstraction took 230562.31 ms. Allocated memory was 2.2 GB in the beginning and 3.6 GB in the end (delta: 1.4 GB). Free memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: 151.6 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-10-24 23:51:41,564 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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. * CACSL2BoogieTranslator took 1693.74 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 532.24 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 737.7 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -881.3 MB). Peak memory consumption was 56.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 306.08 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 30.3 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13216.76 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 457.8 MB). Peak memory consumption was 457.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 230562.31 ms. Allocated memory was 2.2 GB in the beginning and 3.6 GB in the end (delta: 1.4 GB). Free memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: 151.6 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 74). Cancelled while BasicCegarLoop was constructing difference of abstraction (55122states) and FLOYD_HOARE automaton (currently 20 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (6146 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 230.4s OverallTime, 9 OverallIterations, 4 TraceHistogramMax, 161.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3707 SDtfs, 16352 SDslu, 2608 SDs, 0 SdLazy, 32911 SolverSat, 7026 SolverUnsat, 23 SolverUnknown, 0 SolverNotchecked, 147.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1759 GetRequests, 1661 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 54.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58174occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 5.4s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.6s AutomataMinimizationTime, 8 MinimizatonAttempts, 6643 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 56.6s InterpolantComputationTime, 2290 NumberOfCodeBlocks, 2290 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 3100 ConstructedInterpolants, 196 QuantifiedInterpolants, 3146197 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1597 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 17 InterpolantComputations, 8 PerfectInterpolantSequences, 1713/2029 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown