java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 03:30:38,434 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 03:30:38,436 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 03:30:38,452 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 03:30:38,452 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 03:30:38,453 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 03:30:38,457 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 03:30:38,459 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 03:30:38,463 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 03:30:38,464 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 03:30:38,466 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 03:30:38,467 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 03:30:38,468 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 03:30:38,469 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 03:30:38,470 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 03:30:38,479 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 03:30:38,480 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 03:30:38,485 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 03:30:38,489 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 03:30:38,490 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 03:30:38,491 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 03:30:38,492 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 03:30:38,494 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 03:30:38,501 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 03:30:38,502 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 03:30:38,503 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 03:30:38,503 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 03:30:38,504 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-27 03:30:38,529 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 03:30:38,530 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 03:30:38,530 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 03:30:38,531 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 03:30:38,531 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 03:30:38,531 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 03:30:38,531 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 03:30:38,532 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 03:30:38,532 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 03:30:38,533 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 03:30:38,533 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 03:30:38,533 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 03:30:38,534 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 03:30:38,534 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 03:30:38,534 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 03:30:38,534 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 03:30:38,536 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 03:30:38,536 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 03:30:38,537 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 03:30:38,537 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 03:30:38,537 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 03:30:38,537 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 03:30:38,537 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 03:30:38,538 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 03:30:38,538 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 03:30:38,538 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 03:30:38,539 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 03:30:38,539 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 03:30:38,539 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 03:30:38,539 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 03:30:38,539 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 03:30:38,539 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 03:30:38,540 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 03:30:38,540 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 03:30:38,611 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 03:30:38,628 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 03:30:38,632 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 03:30:38,634 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 03:30:38,634 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 03:30:38,635 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-10-27 03:30:38,718 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fbb7c61f1/5ecc96d341684a448d29e79a1c6721ee/FLAGd6c2950cd [2018-10-27 03:30:39,461 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 03:30:39,462 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-10-27 03:30:39,489 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fbb7c61f1/5ecc96d341684a448d29e79a1c6721ee/FLAGd6c2950cd [2018-10-27 03:30:39,508 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/fbb7c61f1/5ecc96d341684a448d29e79a1c6721ee [2018-10-27 03:30:39,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 03:30:39,524 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 03:30:39,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 03:30:39,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 03:30:39,531 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 03:30:39,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:30:39" (1/1) ... [2018-10-27 03:30:39,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@441f49ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:39, skipping insertion in model container [2018-10-27 03:30:39,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:30:39" (1/1) ... [2018-10-27 03:30:39,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 03:30:39,681 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 03:30:40,793 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 03:30:40,798 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 03:30:41,212 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 03:30:41,237 INFO L193 MainTranslator]: Completed translation [2018-10-27 03:30:41,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41 WrapperNode [2018-10-27 03:30:41,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 03:30:41,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 03:30:41,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 03:30:41,240 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 03:30:41,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... [2018-10-27 03:30:41,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... [2018-10-27 03:30:41,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 03:30:41,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 03:30:41,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 03:30:41,717 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 03:30:41,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... [2018-10-27 03:30:41,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... [2018-10-27 03:30:41,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... [2018-10-27 03:30:41,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... [2018-10-27 03:30:41,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... [2018-10-27 03:30:41,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... [2018-10-27 03:30:41,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... [2018-10-27 03:30:42,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 03:30:42,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 03:30:42,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 03:30:42,020 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 03:30:42,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 03:30:42,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 03:30:42,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 03:30:42,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 03:30:42,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 03:30:42,092 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 03:30:42,092 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 03:30:42,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 03:30:42,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 03:30:42,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 03:30:42,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 03:30:55,454 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 03:30:55,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:30:55 BoogieIcfgContainer [2018-10-27 03:30:55,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 03:30:55,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 03:30:55,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 03:30:55,461 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 03:30:55,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:30:39" (1/3) ... [2018-10-27 03:30:55,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e445b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:30:55, skipping insertion in model container [2018-10-27 03:30:55,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:30:41" (2/3) ... [2018-10-27 03:30:55,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e445b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:30:55, skipping insertion in model container [2018-10-27 03:30:55,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:30:55" (3/3) ... [2018-10-27 03:30:55,465 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label11_true-unreach-call.c [2018-10-27 03:30:55,476 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 03:30:55,487 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 03:30:55,506 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 03:30:55,552 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 03:30:55,553 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 03:30:55,553 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 03:30:55,553 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 03:30:55,553 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 03:30:55,553 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 03:30:55,554 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 03:30:55,554 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 03:30:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 03:30:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-27 03:30:55,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:30:55,604 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 03:30:55,606 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:30:55,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:30:55,618 INFO L82 PathProgramCache]: Analyzing trace with hash -492133930, now seen corresponding path program 1 times [2018-10-27 03:30:55,621 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:30:55,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:30:55,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:30:55,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:30:55,679 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:30:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:30:56,188 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-27 03:30:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:30:56,215 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 03:30:56,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 03:30:56,216 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 03:30:56,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 03:30:56,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 03:30:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 03:30:56,244 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 03:31:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 03:31:07,319 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-10-27 03:31:07,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 03:31:07,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-10-27 03:31:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 03:31:07,368 INFO L225 Difference]: With dead ends: 2164 [2018-10-27 03:31:07,368 INFO L226 Difference]: Without dead ends: 1554 [2018-10-27 03:31:07,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 03:31:07,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-10-27 03:31:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-10-27 03:31:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-10-27 03:31:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-10-27 03:31:07,576 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 63 [2018-10-27 03:31:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 03:31:07,578 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-10-27 03:31:07,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 03:31:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-10-27 03:31:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-27 03:31:07,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:31:07,594 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 03:31:07,594 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:31:07,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:31:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1696460921, now seen corresponding path program 1 times [2018-10-27 03:31:07,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:31:07,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:31:07,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:31:07,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:31:07,598 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:31:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:31:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:31:07,913 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 03:31:07,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 03:31:07,913 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 03:31:07,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 03:31:07,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 03:31:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 03:31:07,917 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-10-27 03:31:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 03:31:19,615 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-10-27 03:31:19,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 03:31:19,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2018-10-27 03:31:19,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 03:31:19,634 INFO L225 Difference]: With dead ends: 3031 [2018-10-27 03:31:19,635 INFO L226 Difference]: Without dead ends: 1985 [2018-10-27 03:31:19,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 03:31:19,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-10-27 03:31:19,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-10-27 03:31:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-10-27 03:31:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-10-27 03:31:19,733 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 135 [2018-10-27 03:31:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 03:31:19,736 INFO L481 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-10-27 03:31:19,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 03:31:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-10-27 03:31:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-27 03:31:19,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:31:19,741 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 03:31:19,742 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:31:19,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:31:19,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1297606689, now seen corresponding path program 1 times [2018-10-27 03:31:19,742 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:31:19,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:31:19,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:31:19,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:31:19,744 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:31:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:31:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:31:20,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:31:20,196 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 03:31:20,197 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 139 with the following transitions: [2018-10-27 03:31:20,200 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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] [2018-10-27 03:31:20,273 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 03:31:20,273 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 03:31:21,587 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 03:31:39,385 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 03:31:39,386 INFO L272 AbstractInterpreter]: Visited 83 different actions 543 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 03:31:39,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:31:39,404 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 03:31:39,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:31:39,405 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 03:31:39,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:31:39,417 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 03:31:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:31:39,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 03:31:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:31:44,046 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 03:31:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:31:44,355 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 03:31:44,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-10-27 03:31:44,356 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 03:31:44,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 03:31:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 03:31:44,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-10-27 03:31:44,357 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 3 states. [2018-10-27 03:31:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 03:31:50,836 INFO L93 Difference]: Finished difference Result 5693 states and 9655 transitions. [2018-10-27 03:31:50,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 03:31:50,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2018-10-27 03:31:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 03:31:50,865 INFO L225 Difference]: With dead ends: 5693 [2018-10-27 03:31:50,865 INFO L226 Difference]: Without dead ends: 3740 [2018-10-27 03:31:50,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-10-27 03:31:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2018-10-27 03:31:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3734. [2018-10-27 03:31:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3734 states. [2018-10-27 03:31:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 6077 transitions. [2018-10-27 03:31:50,981 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 6077 transitions. Word has length 138 [2018-10-27 03:31:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 03:31:50,982 INFO L481 AbstractCegarLoop]: Abstraction has 3734 states and 6077 transitions. [2018-10-27 03:31:50,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 03:31:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 6077 transitions. [2018-10-27 03:31:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-27 03:31:50,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:31:50,990 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 03:31:50,991 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:31:50,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:31:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -291330969, now seen corresponding path program 1 times [2018-10-27 03:31:50,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:31:50,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:31:50,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:31:50,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:31:50,993 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:31:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:31:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 113 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-27 03:31:51,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:31:51,334 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 03:31:51,334 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2018-10-27 03:31:51,335 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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], [1310], [1315], [1317], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 03:31:51,341 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 03:31:51,341 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 03:31:52,422 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 03:32:11,257 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 03:32:11,258 INFO L272 AbstractInterpreter]: Visited 104 different actions 592 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 03:32:11,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:32:11,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 03:32:11,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:32:11,267 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 03:32:11,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:32:11,276 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 03:32:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:32:11,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 03:32:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:32:11,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 03:32:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:32:11,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 03:32:11,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 03:32:11,657 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 03:32:11,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 03:32:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 03:32:11,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-27 03:32:11,659 INFO L87 Difference]: Start difference. First operand 3734 states and 6077 transitions. Second operand 9 states. [2018-10-27 03:32:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 03:32:19,381 INFO L93 Difference]: Finished difference Result 9302 states and 15012 transitions. [2018-10-27 03:32:19,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 03:32:19,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 235 [2018-10-27 03:32:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 03:32:19,405 INFO L225 Difference]: With dead ends: 9302 [2018-10-27 03:32:19,405 INFO L226 Difference]: Without dead ends: 4595 [2018-10-27 03:32:19,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 468 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-27 03:32:19,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2018-10-27 03:32:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 4560. [2018-10-27 03:32:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2018-10-27 03:32:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 5524 transitions. [2018-10-27 03:32:19,546 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 5524 transitions. Word has length 235 [2018-10-27 03:32:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 03:32:19,547 INFO L481 AbstractCegarLoop]: Abstraction has 4560 states and 5524 transitions. [2018-10-27 03:32:19,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 03:32:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 5524 transitions. [2018-10-27 03:32:19,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-27 03:32:19,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:32:19,555 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 03:32:19,555 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:32:19,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:32:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1705786468, now seen corresponding path program 1 times [2018-10-27 03:32:19,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:32:19,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:32:19,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:32:19,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:32:19,558 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:32:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:32:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 170 proven. 19 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-10-27 03:32:19,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:32:19,961 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 03:32:19,961 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-10-27 03:32:19,961 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 03:32:19,967 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 03:32:19,967 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 03:32:20,939 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 03:32:33,471 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 03:32:33,472 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. [2018-10-27 03:32:33,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:32:33,508 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 03:32:33,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:32:33,508 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 [2018-10-27 03:32:33,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:32:33,516 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 03:32:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:32:33,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 03:32:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-27 03:32:34,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 03:32:34,934 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-10-27 03:32:34,985 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-10-27 03:32:35,476 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2018-10-27 03:32:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 174 proven. 221 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 03:32:36,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 03:32:36,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2018-10-27 03:32:36,147 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 03:32:36,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 03:32:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 03:32:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2018-10-27 03:32:36,149 INFO L87 Difference]: Start difference. First operand 4560 states and 5524 transitions. Second operand 15 states. [2018-10-27 03:33:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 03:33:18,370 INFO L93 Difference]: Finished difference Result 27136 states and 35203 transitions. [2018-10-27 03:33:18,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-27 03:33:18,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 333 [2018-10-27 03:33:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 03:33:18,502 INFO L225 Difference]: With dead ends: 27136 [2018-10-27 03:33:18,502 INFO L226 Difference]: Without dead ends: 21693 [2018-10-27 03:33:18,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 658 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=833, Invalid=3723, Unknown=0, NotChecked=0, Total=4556 [2018-10-27 03:33:18,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21693 states. [2018-10-27 03:33:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21693 to 20573. [2018-10-27 03:33:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20573 states. [2018-10-27 03:33:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20573 states to 20573 states and 24463 transitions. [2018-10-27 03:33:19,198 INFO L78 Accepts]: Start accepts. Automaton has 20573 states and 24463 transitions. Word has length 333 [2018-10-27 03:33:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 03:33:19,199 INFO L481 AbstractCegarLoop]: Abstraction has 20573 states and 24463 transitions. [2018-10-27 03:33:19,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-27 03:33:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 20573 states and 24463 transitions. [2018-10-27 03:33:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-27 03:33:19,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 03:33:19,216 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 03:33:19,216 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 03:33:19,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:33:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1877965642, now seen corresponding path program 1 times [2018-10-27 03:33:19,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 03:33:19,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:33:19,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:33:19,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 03:33:19,218 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 03:33:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:33:20,082 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-10-27 03:33:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:33:20,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:33:20,582 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 03:33:20,582 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 412 with the following transitions: [2018-10-27 03:33:20,583 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [273], [710], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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], [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], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-10-27 03:33:20,597 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-27 03:33:20,598 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 03:33:28,684 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 03:34:14,330 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 03:34:14,330 INFO L272 AbstractInterpreter]: Visited 356 different actions 1054 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 03:34:14,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 03:34:14,338 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 03:34:14,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 03:34:14,338 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 [2018-10-27 03:34:14,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 03:34:14,346 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 03:34:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 03:34:14,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 03:34:19,088 WARN L179 SmtUtils]: Spent 4.26 s on a formula simplification that was a NOOP. DAG size: 38 [2018-10-27 03:34:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:34:19,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 03:34:19,560 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2018-10-27 03:34:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 03:34:21,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 03:34:21,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-10-27 03:34:21,535 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 03:34:21,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 03:34:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 03:34:21,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-27 03:34:21,537 INFO L87 Difference]: Start difference. First operand 20573 states and 24463 transitions. Second operand 6 states. Received shutdown request... [2018-10-27 03:34:36,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 03:34:36,123 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 03:34:36,128 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 03:34:36,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 03:34:36 BoogieIcfgContainer [2018-10-27 03:34:36,128 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 03:34:36,129 INFO L168 Benchmark]: Toolchain (without parser) took 236606.72 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-27 03:34:36,130 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. [2018-10-27 03:34:36,131 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1712.45 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. [2018-10-27 03:34:36,132 INFO L168 Benchmark]: Boogie Procedure Inliner took 478.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 766.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -916.7 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-27 03:34:36,133 INFO L168 Benchmark]: Boogie Preprocessor took 302.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. [2018-10-27 03:34:36,133 INFO L168 Benchmark]: RCFGBuilder took 13436.24 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 460.3 MB). Peak memory consumption was 460.3 MB. Max. memory is 7.1 GB. [2018-10-27 03:34:36,134 INFO L168 Benchmark]: TraceAbstraction took 220671.58 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.7 GB in the beginning and 2.7 GB in the end (delta: -1.0 GB). Peak memory consumption was 878.6 MB. Max. memory is 7.1 GB. [2018-10-27 03:34:36,139 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 1712.45 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 478.04 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 766.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -916.7 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 302.68 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13436.24 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.7 GB in the end (delta: 460.3 MB). Peak memory consumption was 460.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220671.58 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.7 GB in the beginning and 2.7 GB in the end (delta: -1.0 GB). Peak memory consumption was 878.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 176]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 176). Cancelled while BasicCegarLoop was constructing difference of abstraction (20573states) and FLOYD_HOARE automaton (currently 6 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (15922 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 220.5s OverallTime, 6 OverallIterations, 4 TraceHistogramMax, 94.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1821 SDtfs, 20545 SDslu, 2040 SDs, 0 SdLazy, 26620 SolverSat, 7435 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 83.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2344 GetRequests, 2220 SyntacticMatches, 14 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20573occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 106.4s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 1689 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 17.2s InterpolantComputationTime, 2432 NumberOfCodeBlocks, 2432 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 3535 ConstructedInterpolants, 513 QuantifiedInterpolants, 10756217 SizeOfPredicates, 11 NumberOfNonLiveVariables, 1857 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 1684/2153 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown