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_label25_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 23:45:11,188 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 23:45:11,190 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 23:45:11,203 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 23:45:11,203 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 23:45:11,204 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 23:45:11,205 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 23:45:11,209 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 23:45:11,211 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 23:45:11,213 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 23:45:11,215 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 23:45:11,216 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 23:45:11,217 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 23:45:11,218 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 23:45:11,219 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 23:45:11,219 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 23:45:11,220 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 23:45:11,226 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 23:45:11,231 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 23:45:11,235 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 23:45:11,236 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 23:45:11,237 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 23:45:11,245 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 23:45:11,260 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 23:45:11,290 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 23:45:11,290 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 23:45:11,291 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 23:45:11,291 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 23:45:11,291 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 23:45:11,292 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 23:45:11,292 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 23:45:11,292 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 23:45:11,292 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 23:45:11,292 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 23:45:11,292 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 23:45:11,293 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 23:45:11,293 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 23:45:11,293 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 23:45:11,294 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 23:45:11,294 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 23:45:11,294 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 23:45:11,294 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 23:45:11,294 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 23:45:11,295 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 23:45:11,295 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 23:45:11,295 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 23:45:11,295 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 23:45:11,295 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 23:45:11,296 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 23:45:11,296 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 23:45:11,296 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 23:45:11,296 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 23:45:11,296 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 23:45:11,297 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 23:45:11,297 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 23:45:11,297 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 23:45:11,297 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 23:45:11,297 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 23:45:11,298 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 23:45:11,298 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 23:45:11,341 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 23:45:11,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 23:45:11,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 23:45:11,360 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 23:45:11,360 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 23:45:11,361 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label25_false-unreach-call.c [2018-10-24 23:45:11,430 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/973731ae5/90d9b225009f4caf8c3f55cadc4a6927/FLAGbf5b7d630 [2018-10-24 23:45:12,110 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 23:45:12,111 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label25_false-unreach-call.c [2018-10-24 23:45:12,141 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/973731ae5/90d9b225009f4caf8c3f55cadc4a6927/FLAGbf5b7d630 [2018-10-24 23:45:12,161 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/973731ae5/90d9b225009f4caf8c3f55cadc4a6927 [2018-10-24 23:45:12,176 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 23:45:12,178 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 23:45:12,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 23:45:12,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 23:45:12,183 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 23:45:12,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:12" (1/1) ... [2018-10-24 23:45:12,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68033c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:12, skipping insertion in model container [2018-10-24 23:45:12,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:12" (1/1) ... [2018-10-24 23:45:12,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 23:45:12,340 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 23:45:13,306 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:45:13,311 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 23:45:13,748 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 23:45:13,772 INFO L193 MainTranslator]: Completed translation [2018-10-24 23:45:13,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13 WrapperNode [2018-10-24 23:45:13,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 23:45:13,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 23:45:13,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 23:45:13,774 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 23:45:13,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (1/1) ... [2018-10-24 23:45:13,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (1/1) ... [2018-10-24 23:45:14,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 23:45:14,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 23:45:14,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 23:45:14,247 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 23:45:14,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (1/1) ... [2018-10-24 23:45:14,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (1/1) ... [2018-10-24 23:45:14,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (1/1) ... [2018-10-24 23:45:14,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (1/1) ... [2018-10-24 23:45:14,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (1/1) ... [2018-10-24 23:45:14,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (1/1) ... [2018-10-24 23:45:14,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (1/1) ... [2018-10-24 23:45:14,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 23:45:14,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 23:45:14,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 23:45:14,587 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 23:45:14,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (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 23:45:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 23:45:14,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 23:45:14,664 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 23:45:14,664 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 23:45:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 23:45:14,665 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 23:45:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 23:45:14,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 23:45:14,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 23:45:14,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 23:45:28,784 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 23:45:28,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:28 BoogieIcfgContainer [2018-10-24 23:45:28,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 23:45:28,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 23:45:28,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 23:45:28,790 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 23:45:28,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:45:12" (1/3) ... [2018-10-24 23:45:28,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7c35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:28, skipping insertion in model container [2018-10-24 23:45:28,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:13" (2/3) ... [2018-10-24 23:45:28,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7c35a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:28, skipping insertion in model container [2018-10-24 23:45:28,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:28" (3/3) ... [2018-10-24 23:45:28,794 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label25_false-unreach-call.c [2018-10-24 23:45:28,804 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 23:45:28,813 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 23:45:28,828 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 23:45:28,873 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 23:45:28,873 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 23:45:28,873 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 23:45:28,874 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 23:45:28,874 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 23:45:28,874 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 23:45:28,874 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 23:45:28,874 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 23:45:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-24 23:45:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-24 23:45:28,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:45:28,922 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] [2018-10-24 23:45:28,924 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:45:28,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:45:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash 621618756, now seen corresponding path program 1 times [2018-10-24 23:45:28,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:45:28,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:28,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:45:28,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:28,985 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:45:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:45:29,451 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 23:45:29,462 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 23:45:29,464 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:45:29,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:45:29,465 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:45:29,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:45:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:45:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:45:29,492 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-24 23:45:39,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:45:39,744 INFO L93 Difference]: Finished difference Result 2133 states and 3959 transitions. [2018-10-24 23:45:39,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:45:39,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-10-24 23:45:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:45:39,777 INFO L225 Difference]: With dead ends: 2133 [2018-10-24 23:45:39,777 INFO L226 Difference]: Without dead ends: 1523 [2018-10-24 23:45:39,791 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 23:45:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2018-10-24 23:45:39,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1516. [2018-10-24 23:45:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2018-10-24 23:45:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2287 transitions. [2018-10-24 23:45:39,939 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2287 transitions. Word has length 30 [2018-10-24 23:45:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:45:39,940 INFO L481 AbstractCegarLoop]: Abstraction has 1516 states and 2287 transitions. [2018-10-24 23:45:39,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:45:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2287 transitions. [2018-10-24 23:45:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-24 23:45:39,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:45:39,949 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:45:39,949 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:45:39,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:45:39,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2146255078, now seen corresponding path program 1 times [2018-10-24 23:45:39,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:45:39,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:39,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:45:39,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:45:39,953 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:45:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:45:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:45:40,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:45:40,504 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:45:40,505 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 106 with the following transitions: [2018-10-24 23:45:40,508 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [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 23:45:40,555 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:45:40,555 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:45:42,478 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:45:42,479 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 23:45:42,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:45:42,527 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:45:42,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:45:42,527 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 23:45:42,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:45:42,543 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:45:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:45:42,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:46:11,525 WARN L179 SmtUtils]: Spent 24.33 s on a formula simplification. DAG size of input: 135 DAG size of output: 98 [2018-10-24 23:46:31,796 WARN L179 SmtUtils]: Spent 16.11 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2018-10-24 23:46:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:46:32,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:46:32,696 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-10-24 23:46:37,020 WARN L179 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 133 DAG size of output: 16 [2018-10-24 23:46:37,083 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2018-10-24 23:46:39,774 WARN L179 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 26 [2018-10-24 23:46:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:46:40,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-24 23:46:40,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2018-10-24 23:46:40,134 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:46:40,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:46:40,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:46:40,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=159, Unknown=5, NotChecked=0, Total=210 [2018-10-24 23:46:40,136 INFO L87 Difference]: Start difference. First operand 1516 states and 2287 transitions. Second operand 6 states. [2018-10-24 23:47:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:47:41,913 INFO L93 Difference]: Finished difference Result 5745 states and 8902 transitions. [2018-10-24 23:47:41,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:47:41,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2018-10-24 23:47:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:47:41,940 INFO L225 Difference]: With dead ends: 5745 [2018-10-24 23:47:41,940 INFO L226 Difference]: Without dead ends: 4235 [2018-10-24 23:47:41,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=54, Invalid=181, Unknown=5, NotChecked=0, Total=240 [2018-10-24 23:47:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2018-10-24 23:47:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 4200. [2018-10-24 23:47:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4200 states. [2018-10-24 23:47:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 6333 transitions. [2018-10-24 23:47:42,077 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 6333 transitions. Word has length 105 [2018-10-24 23:47:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:47:42,080 INFO L481 AbstractCegarLoop]: Abstraction has 4200 states and 6333 transitions. [2018-10-24 23:47:42,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:47:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 6333 transitions. [2018-10-24 23:47:42,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-24 23:47:42,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:42,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:47:42,103 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:42,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:42,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1301430671, now seen corresponding path program 1 times [2018-10-24 23:47:42,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:42,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:42,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:42,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:42,105 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:47:42,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:47:42,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 23:47:42,465 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:47:42,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 23:47:42,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 23:47:42,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 23:47:42,467 INFO L87 Difference]: Start difference. First operand 4200 states and 6333 transitions. Second operand 6 states. [2018-10-24 23:47:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:47:48,922 INFO L93 Difference]: Finished difference Result 12526 states and 19805 transitions. [2018-10-24 23:47:48,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 23:47:48,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2018-10-24 23:47:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:47:48,979 INFO L225 Difference]: With dead ends: 12526 [2018-10-24 23:47:48,979 INFO L226 Difference]: Without dead ends: 8332 [2018-10-24 23:47:49,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 23:47:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8332 states. [2018-10-24 23:47:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8332 to 8265. [2018-10-24 23:47:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8265 states. [2018-10-24 23:47:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 12026 transitions. [2018-10-24 23:47:49,284 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 12026 transitions. Word has length 172 [2018-10-24 23:47:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:47:49,285 INFO L481 AbstractCegarLoop]: Abstraction has 8265 states and 12026 transitions. [2018-10-24 23:47:49,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 23:47:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 12026 transitions. [2018-10-24 23:47:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-24 23:47:49,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:49,295 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, 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] [2018-10-24 23:47:49,295 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:49,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1752335123, now seen corresponding path program 1 times [2018-10-24 23:47:49,296 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:49,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:49,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:49,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:49,297 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 47 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-24 23:47:49,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:49,648 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:47:49,648 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 189 with the following transitions: [2018-10-24 23:47:49,649 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [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], [1262], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:47:49,654 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:47:49,654 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:47:50,717 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:47:50,718 INFO L272 AbstractInterpreter]: Visited 92 different actions 262 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 23:47:50,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:50,744 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:47:50,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:50,745 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 23:47:50,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:50,760 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:47:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:50,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:47:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:47:51,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:47:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:47:51,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:47:51,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-24 23:47:51,577 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:47:51,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 23:47:51,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 23:47:51,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-24 23:47:51,579 INFO L87 Difference]: Start difference. First operand 8265 states and 12026 transitions. Second operand 9 states. [2018-10-24 23:47:58,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:47:58,387 INFO L93 Difference]: Finished difference Result 20088 states and 29459 transitions. [2018-10-24 23:47:58,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 23:47:58,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2018-10-24 23:47:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:47:58,466 INFO L225 Difference]: With dead ends: 20088 [2018-10-24 23:47:58,467 INFO L226 Difference]: Without dead ends: 11829 [2018-10-24 23:47:58,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 374 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-24 23:47:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11829 states. [2018-10-24 23:47:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11829 to 11806. [2018-10-24 23:47:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11806 states. [2018-10-24 23:47:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11806 states to 11806 states and 15131 transitions. [2018-10-24 23:47:58,818 INFO L78 Accepts]: Start accepts. Automaton has 11806 states and 15131 transitions. Word has length 188 [2018-10-24 23:47:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:47:58,819 INFO L481 AbstractCegarLoop]: Abstraction has 11806 states and 15131 transitions. [2018-10-24 23:47:58,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 23:47:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 11806 states and 15131 transitions. [2018-10-24 23:47:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-24 23:47:58,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:47:58,825 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, 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 23:47:58,825 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:47:58,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:47:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1245707981, now seen corresponding path program 1 times [2018-10-24 23:47:58,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:47:58,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:58,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:47:58,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:47:58,827 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:47:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:47:59,176 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 23:47:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 95 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 23:47:59,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:47:59,911 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:47:59,912 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 206 with the following transitions: [2018-10-24 23:47:59,912 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [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], [1278], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:47:59,920 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:47:59,920 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:48:00,234 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:48:00,234 INFO L272 AbstractInterpreter]: Visited 97 different actions 190 times. Merged at 7 different actions 8 times. Never widened. Found 2 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-24 23:48:00,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:00,272 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:48:00,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:00,272 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 23:48:00,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:00,290 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:48:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:00,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:48:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:48:00,439 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:48:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:48:00,726 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-24 23:48:00,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-24 23:48:00,726 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:48:00,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 23:48:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 23:48:00,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:48:00,728 INFO L87 Difference]: Start difference. First operand 11806 states and 15131 transitions. Second operand 3 states. [2018-10-24 23:48:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:48:04,291 INFO L93 Difference]: Finished difference Result 23606 states and 30256 transitions. [2018-10-24 23:48:04,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 23:48:04,298 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2018-10-24 23:48:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:48:04,336 INFO L225 Difference]: With dead ends: 23606 [2018-10-24 23:48:04,337 INFO L226 Difference]: Without dead ends: 11806 [2018-10-24 23:48:04,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 410 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:48:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11806 states. [2018-10-24 23:48:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11806 to 11806. [2018-10-24 23:48:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11806 states. [2018-10-24 23:48:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11806 states to 11806 states and 14374 transitions. [2018-10-24 23:48:04,604 INFO L78 Accepts]: Start accepts. Automaton has 11806 states and 14374 transitions. Word has length 205 [2018-10-24 23:48:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:48:04,605 INFO L481 AbstractCegarLoop]: Abstraction has 11806 states and 14374 transitions. [2018-10-24 23:48:04,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 23:48:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11806 states and 14374 transitions. [2018-10-24 23:48:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-24 23:48:04,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:48:04,613 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:48:04,613 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:48:04,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:04,613 INFO L82 PathProgramCache]: Analyzing trace with hash -795953761, now seen corresponding path program 1 times [2018-10-24 23:48:04,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:48:04,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:04,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:04,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:04,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:48:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 23:48:04,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 23:48:04,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 23:48:04,948 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 23:48:04,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 23:48:04,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 23:48:04,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 23:48:04,949 INFO L87 Difference]: Start difference. First operand 11806 states and 14374 transitions. Second operand 4 states. [2018-10-24 23:48:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:48:15,289 INFO L93 Difference]: Finished difference Result 31996 states and 39456 transitions. [2018-10-24 23:48:15,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 23:48:15,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2018-10-24 23:48:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:48:15,343 INFO L225 Difference]: With dead ends: 31996 [2018-10-24 23:48:15,343 INFO L226 Difference]: Without dead ends: 20196 [2018-10-24 23:48:15,371 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 23:48:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20196 states. [2018-10-24 23:48:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20196 to 20183. [2018-10-24 23:48:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20183 states. [2018-10-24 23:48:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20183 states to 20183 states and 23975 transitions. [2018-10-24 23:48:15,924 INFO L78 Accepts]: Start accepts. Automaton has 20183 states and 23975 transitions. Word has length 260 [2018-10-24 23:48:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:48:15,924 INFO L481 AbstractCegarLoop]: Abstraction has 20183 states and 23975 transitions. [2018-10-24 23:48:15,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 23:48:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 20183 states and 23975 transitions. [2018-10-24 23:48:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-24 23:48:15,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:48:15,936 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, 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, 3, 3, 3, 3, 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 23:48:15,936 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:48:15,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:15,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1849561965, now seen corresponding path program 1 times [2018-10-24 23:48:15,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:48:15,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:15,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:15,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:15,938 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:48:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:48:16,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:16,553 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:48:16,554 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 305 with the following transitions: [2018-10-24 23:48:16,554 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [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], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1333], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:48:16,558 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:48:16,558 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:48:16,862 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:48:16,863 INFO L272 AbstractInterpreter]: Visited 109 different actions 220 times. Merged at 8 different actions 14 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-24 23:48:16,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:16,893 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:48:16,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:16,894 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 23:48:16,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:16,907 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:48:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:17,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:48:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:48:17,187 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:48:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 245 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-10-24 23:48:17,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:48:17,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-10-24 23:48:17,700 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:48:17,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 23:48:17,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 23:48:17,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-24 23:48:17,703 INFO L87 Difference]: Start difference. First operand 20183 states and 23975 transitions. Second operand 7 states. [2018-10-24 23:48:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:48:31,704 INFO L93 Difference]: Finished difference Result 54554 states and 66445 transitions. [2018-10-24 23:48:31,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 23:48:31,705 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 304 [2018-10-24 23:48:31,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:48:31,804 INFO L225 Difference]: With dead ends: 54554 [2018-10-24 23:48:31,804 INFO L226 Difference]: Without dead ends: 31230 [2018-10-24 23:48:31,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 609 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-24 23:48:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31230 states. [2018-10-24 23:48:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31230 to 30248. [2018-10-24 23:48:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30248 states. [2018-10-24 23:48:32,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30248 states to 30248 states and 34551 transitions. [2018-10-24 23:48:32,371 INFO L78 Accepts]: Start accepts. Automaton has 30248 states and 34551 transitions. Word has length 304 [2018-10-24 23:48:32,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:48:32,372 INFO L481 AbstractCegarLoop]: Abstraction has 30248 states and 34551 transitions. [2018-10-24 23:48:32,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 23:48:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 30248 states and 34551 transitions. [2018-10-24 23:48:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-10-24 23:48:32,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:48:32,386 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:48:32,386 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:48:32,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:32,386 INFO L82 PathProgramCache]: Analyzing trace with hash 228019061, now seen corresponding path program 1 times [2018-10-24 23:48:32,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:48:32,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:32,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:32,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:32,388 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:48:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 23:48:32,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:32,732 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:48:32,732 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 318 with the following transitions: [2018-10-24 23:48:32,733 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [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], [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], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:48:32,739 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:48:32,740 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:48:33,255 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:48:33,255 INFO L272 AbstractInterpreter]: Visited 208 different actions 415 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 23:48:33,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:33,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:48:33,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:33,291 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:48:33,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:33,305 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:48:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:33,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:48:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-24 23:48:33,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:48:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 51 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 23:48:37,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:48:37,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2018-10-24 23:48:37,031 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:48:37,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 23:48:37,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 23:48:37,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-10-24 23:48:37,032 INFO L87 Difference]: Start difference. First operand 30248 states and 34551 transitions. Second operand 9 states. [2018-10-24 23:48:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 23:48:51,567 INFO L93 Difference]: Finished difference Result 78933 states and 93709 transitions. [2018-10-24 23:48:51,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 23:48:51,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2018-10-24 23:48:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 23:48:51,693 INFO L225 Difference]: With dead ends: 78933 [2018-10-24 23:48:51,693 INFO L226 Difference]: Without dead ends: 46883 [2018-10-24 23:48:51,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 628 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2018-10-24 23:48:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46883 states. [2018-10-24 23:48:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46883 to 43523. [2018-10-24 23:48:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43523 states. [2018-10-24 23:48:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43523 states to 43523 states and 50407 transitions. [2018-10-24 23:48:52,825 INFO L78 Accepts]: Start accepts. Automaton has 43523 states and 50407 transitions. Word has length 317 [2018-10-24 23:48:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 23:48:52,826 INFO L481 AbstractCegarLoop]: Abstraction has 43523 states and 50407 transitions. [2018-10-24 23:48:52,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 23:48:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 43523 states and 50407 transitions. [2018-10-24 23:48:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2018-10-24 23:48:52,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 23:48:52,849 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:48:52,849 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 23:48:52,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:52,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1636829654, now seen corresponding path program 1 times [2018-10-24 23:48:52,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 23:48:52,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:52,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:52,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 23:48:52,851 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 23:48:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 75 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-24 23:48:53,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:53,847 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 23:48:53,847 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 426 with the following transitions: [2018-10-24 23:48:53,848 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [850], [852], [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], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1845], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 23:48:53,853 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 23:48:53,853 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 23:48:54,343 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 23:48:54,344 INFO L272 AbstractInterpreter]: Visited 209 different actions 419 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 23:48:54,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 23:48:54,376 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 23:48:54,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 23:48:54,376 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 23:48:54,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 23:48:54,390 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 23:48:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 23:48:54,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 23:48:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 23:48:54,862 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 23:48:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 266 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-24 23:48:55,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 23:48:55,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-10-24 23:48:55,244 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 23:48:55,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 23:48:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 23:48:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-24 23:48:55,246 INFO L87 Difference]: Start difference. First operand 43523 states and 50407 transitions. Second operand 10 states. Received shutdown request... [2018-10-24 23:49:20,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 23:49:20,551 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 23:49:20,558 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 23:49:20,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:49:20 BoogieIcfgContainer [2018-10-24 23:49:20,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 23:49:20,559 INFO L168 Benchmark]: Toolchain (without parser) took 248382.90 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -642.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-10-24 23:49:20,561 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 23:49:20,561 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1594.10 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 23:49:20,562 INFO L168 Benchmark]: Boogie Procedure Inliner took 472.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 796.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -949.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:20,563 INFO L168 Benchmark]: Boogie Preprocessor took 339.81 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:20,563 INFO L168 Benchmark]: RCFGBuilder took 14198.36 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: 486.1 MB). Peak memory consumption was 486.1 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:20,569 INFO L168 Benchmark]: TraceAbstraction took 231772.11 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.1 GB). Free memory was 1.7 GB in the beginning and 2.1 GB in the end (delta: -345.5 MB). Peak memory consumption was 777.0 MB. Max. memory is 7.1 GB. [2018-10-24 23:49:20,575 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 1594.10 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 472.78 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 796.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -949.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 339.81 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14198.36 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: 486.1 MB). Peak memory consumption was 486.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 231772.11 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.1 GB). Free memory was 1.7 GB in the beginning and 2.1 GB in the end (delta: -345.5 MB). Peak memory consumption was 777.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 77). Cancelled while BasicCegarLoop was constructing difference of abstraction (43523states) and FLOYD_HOARE automaton (currently 22 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (95430 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 231.6s OverallTime, 9 OverallIterations, 4 TraceHistogramMax, 153.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3446 SDtfs, 19837 SDslu, 3109 SDs, 0 SdLazy, 34886 SolverSat, 9254 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 139.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3214 GetRequests, 3094 SyntacticMatches, 15 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 63.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43523occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 4.9s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 4487 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 67.5s InterpolantComputationTime, 3550 NumberOfCodeBlocks, 3550 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 5073 ConstructedInterpolants, 204 QuantifiedInterpolants, 6271371 SizeOfPredicates, 9 NumberOfNonLiveVariables, 2756 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 21 InterpolantComputations, 6 PerfectInterpolantSequences, 3069/3442 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown