java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label56_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:42:59,559 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:42:59,562 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:42:59,579 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:42:59,580 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:42:59,581 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:42:59,582 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:42:59,584 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:42:59,586 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:42:59,587 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:42:59,587 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:42:59,588 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:42:59,589 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:42:59,590 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:42:59,591 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:42:59,592 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:42:59,593 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:42:59,595 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:42:59,596 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:42:59,598 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:42:59,599 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:42:59,600 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:42:59,603 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:42:59,603 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:42:59,604 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:42:59,605 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:42:59,606 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:42:59,606 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:42:59,607 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:42:59,609 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:42:59,610 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:42:59,611 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:42:59,611 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:42:59,611 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:42:59,613 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:42:59,614 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:42:59,615 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 18:42:59,645 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:42:59,646 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:42:59,647 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:42:59,650 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:42:59,650 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:42:59,650 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:42:59,650 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:42:59,651 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:42:59,651 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:42:59,651 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:42:59,651 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:42:59,651 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:42:59,651 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:42:59,653 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:42:59,653 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:42:59,653 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:42:59,653 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:42:59,653 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:42:59,654 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:42:59,654 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:42:59,654 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:42:59,654 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:42:59,654 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:42:59,656 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:42:59,656 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:42:59,657 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:42:59,657 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:42:59,657 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:42:59,657 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:42:59,657 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:42:59,658 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:42:59,658 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:42:59,658 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:42:59,658 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:42:59,658 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:42:59,728 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:42:59,741 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:42:59,745 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:42:59,746 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:42:59,747 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:42:59,748 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label56_true-unreach-call.c [2018-11-12 18:42:59,819 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6108777/c49f53d7689249ce91fee1f69ce86853/FLAG534b5d233 [2018-11-12 18:43:00,480 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:43:00,481 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label56_true-unreach-call.c [2018-11-12 18:43:00,497 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6108777/c49f53d7689249ce91fee1f69ce86853/FLAG534b5d233 [2018-11-12 18:43:00,513 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c6108777/c49f53d7689249ce91fee1f69ce86853 [2018-11-12 18:43:00,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:43:00,526 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:43:00,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:43:00,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:43:00,531 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:43:00,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:43:00" (1/1) ... [2018-11-12 18:43:00,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab70265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:00, skipping insertion in model container [2018-11-12 18:43:00,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:43:00" (1/1) ... [2018-11-12 18:43:00,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:43:00,643 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:43:01,260 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:43:01,266 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:43:01,515 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:43:01,535 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:43:01,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01 WrapperNode [2018-11-12 18:43:01,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:43:01,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:43:01,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:43:01,537 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:43:01,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... [2018-11-12 18:43:01,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... [2018-11-12 18:43:01,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:43:01,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:43:01,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:43:01,735 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:43:01,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... [2018-11-12 18:43:01,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... [2018-11-12 18:43:01,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... [2018-11-12 18:43:01,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... [2018-11-12 18:43:01,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... [2018-11-12 18:43:01,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... [2018-11-12 18:43:01,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... [2018-11-12 18:43:01,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:43:01,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:43:01,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:43:01,857 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:43:01,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 18:43:01,942 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:43:01,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:43:01,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:43:01,942 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:43:01,943 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:43:01,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:43:01,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:43:01,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:43:01,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:43:06,326 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:43:06,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:43:06 BoogieIcfgContainer [2018-11-12 18:43:06,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:43:06,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:43:06,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:43:06,331 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:43:06,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:43:00" (1/3) ... [2018-11-12 18:43:06,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a92b8ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:43:06, skipping insertion in model container [2018-11-12 18:43:06,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:43:01" (2/3) ... [2018-11-12 18:43:06,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a92b8ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:43:06, skipping insertion in model container [2018-11-12 18:43:06,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:43:06" (3/3) ... [2018-11-12 18:43:06,336 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label56_true-unreach-call.c [2018-11-12 18:43:06,345 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:43:06,353 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:43:06,369 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:43:06,419 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:43:06,420 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:43:06,420 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:43:06,420 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:43:06,420 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:43:06,420 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:43:06,421 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:43:06,421 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:43:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 18:43:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-12 18:43:06,460 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:06,461 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] [2018-11-12 18:43:06,464 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:06,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash -822687572, now seen corresponding path program 1 times [2018-11-12 18:43:06,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:06,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:06,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:06,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:06,529 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:06,910 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 18:43:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:43:07,002 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:43:07,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 18:43:07,002 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:07,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:43:07,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:43:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:43:07,031 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-11-12 18:43:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:09,184 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-11-12 18:43:09,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:43:09,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2018-11-12 18:43:09,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:09,208 INFO L225 Difference]: With dead ends: 782 [2018-11-12 18:43:09,208 INFO L226 Difference]: Without dead ends: 487 [2018-11-12 18:43:09,216 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:43:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-11-12 18:43:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-11-12 18:43:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-11-12 18:43:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-11-12 18:43:09,310 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 48 [2018-11-12 18:43:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:09,311 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-11-12 18:43:09,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:43:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-11-12 18:43:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-12 18:43:09,321 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:09,321 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:43:09,322 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:09,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash -191480489, now seen corresponding path program 1 times [2018-11-12 18:43:09,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:09,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:09,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:09,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:09,324 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:43:09,893 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:43:09,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-12 18:43:09,893 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:09,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:43:09,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:43:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:43:09,896 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-11-12 18:43:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:16,195 INFO L93 Difference]: Finished difference Result 1759 states and 3238 transitions. [2018-11-12 18:43:16,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 18:43:16,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2018-11-12 18:43:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:16,211 INFO L225 Difference]: With dead ends: 1759 [2018-11-12 18:43:16,212 INFO L226 Difference]: Without dead ends: 1283 [2018-11-12 18:43:16,217 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-12 18:43:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2018-11-12 18:43:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1037. [2018-11-12 18:43:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-11-12 18:43:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1685 transitions. [2018-11-12 18:43:16,305 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1685 transitions. Word has length 123 [2018-11-12 18:43:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:16,306 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 1685 transitions. [2018-11-12 18:43:16,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:43:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1685 transitions. [2018-11-12 18:43:16,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-11-12 18:43:16,315 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:16,315 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:43:16,316 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:16,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:16,316 INFO L82 PathProgramCache]: Analyzing trace with hash -259626392, now seen corresponding path program 1 times [2018-11-12 18:43:16,316 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:16,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:16,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:16,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:16,318 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 82 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 18:43:16,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:16,519 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:16,520 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 197 with the following transitions: [2018-11-12 18:43:16,522 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [514], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:43:16,567 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:16,567 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:17,045 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:43:17,048 INFO L272 AbstractInterpreter]: Visited 80 different actions 80 times. Never merged. Never widened. Performed 824 root evaluator evaluations with a maximum evaluation depth of 6. Performed 824 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 28 variables. [2018-11-12 18:43:17,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:17,094 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:43:17,663 INFO L227 lantSequenceWeakener]: Weakened 187 states. On average, predicates are now at 73.53% of their original sizes. [2018-11-12 18:43:17,663 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:43:17,812 INFO L415 sIntCurrentIteration]: We unified 195 AI predicates to 195 [2018-11-12 18:43:17,812 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:43:17,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:43:17,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-12 18:43:17,813 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:17,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:43:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:43:17,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:43:17,815 INFO L87 Difference]: Start difference. First operand 1037 states and 1685 transitions. Second operand 7 states. [2018-11-12 18:43:21,248 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:37,387 INFO L93 Difference]: Finished difference Result 2260 states and 3574 transitions. [2018-11-12 18:43:37,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:43:37,387 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 196 [2018-11-12 18:43:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:37,397 INFO L225 Difference]: With dead ends: 2260 [2018-11-12 18:43:37,398 INFO L226 Difference]: Without dead ends: 1229 [2018-11-12 18:43:37,401 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 196 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:43:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2018-11-12 18:43:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1227. [2018-11-12 18:43:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1227 states. [2018-11-12 18:43:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1883 transitions. [2018-11-12 18:43:37,434 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1883 transitions. Word has length 196 [2018-11-12 18:43:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:37,435 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 1883 transitions. [2018-11-12 18:43:37,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:43:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1883 transitions. [2018-11-12 18:43:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-11-12 18:43:37,440 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:37,440 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:43:37,440 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:37,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash 188115406, now seen corresponding path program 1 times [2018-11-12 18:43:37,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:37,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:37,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:37,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:37,443 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-11-12 18:43:37,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:43:37,877 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:43:37,878 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 241 with the following transitions: [2018-11-12 18:43:37,878 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:43:37,885 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:43:37,885 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:43:37,998 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:43:38,313 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:43:38,313 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Performed 3011 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3011 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:43:38,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:38,349 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:43:38,891 INFO L227 lantSequenceWeakener]: Weakened 237 states. On average, predicates are now at 73.49% of their original sizes. [2018-11-12 18:43:38,891 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:43:39,834 INFO L415 sIntCurrentIteration]: We unified 239 AI predicates to 239 [2018-11-12 18:43:39,835 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:43:39,835 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:43:39,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-12 18:43:39,835 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:39,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:43:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:43:39,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:43:39,839 INFO L87 Difference]: Start difference. First operand 1227 states and 1883 transitions. Second operand 11 states. [2018-11-12 18:43:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:43:58,140 INFO L93 Difference]: Finished difference Result 2453 states and 3929 transitions. [2018-11-12 18:43:58,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:43:58,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 240 [2018-11-12 18:43:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:43:58,150 INFO L225 Difference]: With dead ends: 2453 [2018-11-12 18:43:58,150 INFO L226 Difference]: Without dead ends: 1422 [2018-11-12 18:43:58,153 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 248 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:43:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2018-11-12 18:43:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1418. [2018-11-12 18:43:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1418 states. [2018-11-12 18:43:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2090 transitions. [2018-11-12 18:43:58,191 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2090 transitions. Word has length 240 [2018-11-12 18:43:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:43:58,192 INFO L480 AbstractCegarLoop]: Abstraction has 1418 states and 2090 transitions. [2018-11-12 18:43:58,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:43:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2090 transitions. [2018-11-12 18:43:58,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-11-12 18:43:58,197 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:43:58,197 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:43:58,198 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:43:58,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:43:58,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1100609894, now seen corresponding path program 1 times [2018-11-12 18:43:58,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:43:58,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:58,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:43:58,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:43:58,200 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:43:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:43:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:43:58,549 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:43:58,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:43:58,549 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:43:58,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:43:58,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:43:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:43:58,551 INFO L87 Difference]: Start difference. First operand 1418 states and 2090 transitions. Second operand 4 states. [2018-11-12 18:44:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:44:00,422 INFO L93 Difference]: Finished difference Result 3943 states and 6559 transitions. [2018-11-12 18:44:00,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:44:00,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 250 [2018-11-12 18:44:00,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:44:00,439 INFO L225 Difference]: With dead ends: 3943 [2018-11-12 18:44:00,439 INFO L226 Difference]: Without dead ends: 2912 [2018-11-12 18:44:00,447 INFO L604 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 [2018-11-12 18:44:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2018-11-12 18:44:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2896. [2018-11-12 18:44:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2896 states. [2018-11-12 18:44:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4414 transitions. [2018-11-12 18:44:00,521 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4414 transitions. Word has length 250 [2018-11-12 18:44:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:44:00,522 INFO L480 AbstractCegarLoop]: Abstraction has 2896 states and 4414 transitions. [2018-11-12 18:44:00,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:44:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4414 transitions. [2018-11-12 18:44:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-11-12 18:44:00,530 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:44:00,530 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:44:00,530 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:44:00,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2052167774, now seen corresponding path program 1 times [2018-11-12 18:44:00,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:44:00,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:00,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:00,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:00,532 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:44:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 171 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:44:00,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:00,940 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:44:00,941 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 267 with the following transitions: [2018-11-12 18:44:00,941 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [578], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:44:00,946 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:44:00,946 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:44:01,139 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:44:01,648 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:44:01,648 INFO L272 AbstractInterpreter]: Visited 135 different actions 392 times. Merged at 5 different actions 9 times. Never widened. Performed 6440 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6440 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:44:01,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:01,657 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:44:02,066 INFO L227 lantSequenceWeakener]: Weakened 263 states. On average, predicates are now at 73.45% of their original sizes. [2018-11-12 18:44:02,066 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:44:02,389 INFO L415 sIntCurrentIteration]: We unified 265 AI predicates to 265 [2018-11-12 18:44:02,389 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:44:02,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:44:02,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-12 18:44:02,390 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:44:02,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:44:02,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:44:02,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:44:02,391 INFO L87 Difference]: Start difference. First operand 2896 states and 4414 transitions. Second operand 11 states. [2018-11-12 18:44:12,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:44:12,492 INFO L93 Difference]: Finished difference Result 5797 states and 9177 transitions. [2018-11-12 18:44:12,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:44:12,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 266 [2018-11-12 18:44:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:44:12,508 INFO L225 Difference]: With dead ends: 5797 [2018-11-12 18:44:12,509 INFO L226 Difference]: Without dead ends: 3288 [2018-11-12 18:44:12,521 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 275 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:44:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2018-11-12 18:44:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 3090. [2018-11-12 18:44:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3090 states. [2018-11-12 18:44:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 4645 transitions. [2018-11-12 18:44:12,596 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 4645 transitions. Word has length 266 [2018-11-12 18:44:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:44:12,597 INFO L480 AbstractCegarLoop]: Abstraction has 3090 states and 4645 transitions. [2018-11-12 18:44:12,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:44:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 4645 transitions. [2018-11-12 18:44:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-11-12 18:44:12,605 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:44:12,605 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:44:12,606 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:44:12,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:12,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1316171772, now seen corresponding path program 1 times [2018-11-12 18:44:12,606 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:44:12,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:12,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:12,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:12,608 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:44:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-11-12 18:44:12,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:44:12,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:44:12,823 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:44:12,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:44:12,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:44:12,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:44:12,824 INFO L87 Difference]: Start difference. First operand 3090 states and 4645 transitions. Second operand 4 states. [2018-11-12 18:44:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:44:15,314 INFO L93 Difference]: Finished difference Result 10180 states and 16398 transitions. [2018-11-12 18:44:15,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:44:15,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 271 [2018-11-12 18:44:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:44:15,352 INFO L225 Difference]: With dead ends: 10180 [2018-11-12 18:44:15,352 INFO L226 Difference]: Without dead ends: 7476 [2018-11-12 18:44:15,374 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:44:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2018-11-12 18:44:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 7473. [2018-11-12 18:44:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7473 states. [2018-11-12 18:44:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7473 states to 7473 states and 11270 transitions. [2018-11-12 18:44:15,593 INFO L78 Accepts]: Start accepts. Automaton has 7473 states and 11270 transitions. Word has length 271 [2018-11-12 18:44:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:44:15,594 INFO L480 AbstractCegarLoop]: Abstraction has 7473 states and 11270 transitions. [2018-11-12 18:44:15,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:44:15,594 INFO L276 IsEmpty]: Start isEmpty. Operand 7473 states and 11270 transitions. [2018-11-12 18:44:15,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-11-12 18:44:15,620 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:44:15,621 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:44:15,621 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:44:15,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:15,622 INFO L82 PathProgramCache]: Analyzing trace with hash 385643921, now seen corresponding path program 1 times [2018-11-12 18:44:15,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:44:15,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:15,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:15,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:15,623 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:44:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 87 proven. 101 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-12 18:44:16,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:16,484 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:44:16,484 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 290 with the following transitions: [2018-11-12 18:44:16,485 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [657], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:44:16,490 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:44:16,490 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:44:16,713 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:44:17,628 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:44:17,629 INFO L272 AbstractInterpreter]: Visited 141 different actions 553 times. Merged at 7 different actions 24 times. Never widened. Performed 10333 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10333 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:44:17,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:17,639 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:44:17,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:17,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 18:44:17,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:17,654 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:44:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:17,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:44:22,837 WARN L179 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2018-11-12 18:44:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-11-12 18:44:23,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:44:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:44:23,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:44:23,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 12 [2018-11-12 18:44:23,698 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:44:23,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 18:44:23,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 18:44:23,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=89, Unknown=2, NotChecked=0, Total=132 [2018-11-12 18:44:23,700 INFO L87 Difference]: Start difference. First operand 7473 states and 11270 transitions. Second operand 10 states. [2018-11-12 18:44:32,062 WARN L179 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 27 DAG size of output: 13 [2018-11-12 18:44:50,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:44:50,815 INFO L93 Difference]: Finished difference Result 21855 states and 35899 transitions. [2018-11-12 18:44:50,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-12 18:44:50,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 289 [2018-11-12 18:44:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:44:50,932 INFO L225 Difference]: With dead ends: 21855 [2018-11-12 18:44:50,932 INFO L226 Difference]: Without dead ends: 14768 [2018-11-12 18:44:50,980 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 574 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=212, Invalid=542, Unknown=2, NotChecked=0, Total=756 [2018-11-12 18:44:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14768 states. [2018-11-12 18:44:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14768 to 13391. [2018-11-12 18:44:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13391 states. [2018-11-12 18:44:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13391 states to 13391 states and 20763 transitions. [2018-11-12 18:44:51,426 INFO L78 Accepts]: Start accepts. Automaton has 13391 states and 20763 transitions. Word has length 289 [2018-11-12 18:44:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:44:51,426 INFO L480 AbstractCegarLoop]: Abstraction has 13391 states and 20763 transitions. [2018-11-12 18:44:51,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 18:44:51,427 INFO L276 IsEmpty]: Start isEmpty. Operand 13391 states and 20763 transitions. [2018-11-12 18:44:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-11-12 18:44:51,460 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:44:51,460 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:44:51,461 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:44:51,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash -431969405, now seen corresponding path program 1 times [2018-11-12 18:44:51,461 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:44:51,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:51,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:44:51,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:44:51,462 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:44:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:44:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-11-12 18:44:51,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:44:51,743 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:44:51,743 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 320 with the following transitions: [2018-11-12 18:44:51,743 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:44:51,749 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:44:51,749 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:44:51,848 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:44:52,653 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:44:52,653 INFO L272 AbstractInterpreter]: Visited 156 different actions 612 times. Merged at 7 different actions 21 times. Never widened. Performed 10300 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10300 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:44:52,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:44:52,662 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:44:53,266 INFO L227 lantSequenceWeakener]: Weakened 105 states. On average, predicates are now at 74.49% of their original sizes. [2018-11-12 18:44:53,267 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:44:53,717 INFO L415 sIntCurrentIteration]: We unified 318 AI predicates to 318 [2018-11-12 18:44:53,717 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:44:53,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:44:53,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [5] total 24 [2018-11-12 18:44:53,718 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:44:53,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 18:44:53,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 18:44:53,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:44:53,720 INFO L87 Difference]: Start difference. First operand 13391 states and 20763 transitions. Second operand 21 states. [2018-11-12 18:45:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:45:24,065 INFO L93 Difference]: Finished difference Result 28275 states and 44554 transitions. [2018-11-12 18:45:24,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-12 18:45:24,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 319 [2018-11-12 18:45:24,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:45:24,132 INFO L225 Difference]: With dead ends: 28275 [2018-11-12 18:45:24,133 INFO L226 Difference]: Without dead ends: 15652 [2018-11-12 18:45:24,183 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 337 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2018-11-12 18:45:24,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2018-11-12 18:45:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 15131. [2018-11-12 18:45:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15131 states. [2018-11-12 18:45:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15131 states to 15131 states and 22701 transitions. [2018-11-12 18:45:24,535 INFO L78 Accepts]: Start accepts. Automaton has 15131 states and 22701 transitions. Word has length 319 [2018-11-12 18:45:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:45:24,536 INFO L480 AbstractCegarLoop]: Abstraction has 15131 states and 22701 transitions. [2018-11-12 18:45:24,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 18:45:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 15131 states and 22701 transitions. [2018-11-12 18:45:24,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-11-12 18:45:24,590 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:45:24,591 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:45:24,591 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:45:24,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:24,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1408185684, now seen corresponding path program 1 times [2018-11-12 18:45:24,591 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:45:24,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:24,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:45:24,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:24,593 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:45:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:45:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-12 18:45:24,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:45:24,915 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:45:24,915 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 361 with the following transitions: [2018-11-12 18:45:24,915 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [657], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:45:24,918 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:45:24,918 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:45:25,072 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:45:25,729 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:45:25,730 INFO L272 AbstractInterpreter]: Visited 142 different actions 565 times. Merged at 8 different actions 32 times. Never widened. Performed 10331 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10331 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 7 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:45:25,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:25,736 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:45:25,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:45:25,736 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 18:45:25,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:45:25,745 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:45:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:45:25,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:45:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-12 18:45:25,985 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:45:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-12 18:45:26,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:45:26,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 18:45:26,878 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:45:26,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 18:45:26,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 18:45:26,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:45:26,879 INFO L87 Difference]: Start difference. First operand 15131 states and 22701 transitions. Second operand 9 states. [2018-11-12 18:45:33,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:45:33,485 INFO L93 Difference]: Finished difference Result 43240 states and 81097 transitions. [2018-11-12 18:45:33,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-12 18:45:33,485 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2018-11-12 18:45:33,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:45:33,743 INFO L225 Difference]: With dead ends: 43240 [2018-11-12 18:45:33,743 INFO L226 Difference]: Without dead ends: 30427 [2018-11-12 18:45:33,927 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 737 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2018-11-12 18:45:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30427 states. [2018-11-12 18:45:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30427 to 28143. [2018-11-12 18:45:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28143 states. [2018-11-12 18:45:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28143 states to 28143 states and 38001 transitions. [2018-11-12 18:45:34,895 INFO L78 Accepts]: Start accepts. Automaton has 28143 states and 38001 transitions. Word has length 360 [2018-11-12 18:45:34,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:45:34,895 INFO L480 AbstractCegarLoop]: Abstraction has 28143 states and 38001 transitions. [2018-11-12 18:45:34,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 18:45:34,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28143 states and 38001 transitions. [2018-11-12 18:45:34,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-11-12 18:45:34,969 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:45:34,970 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:45:34,970 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:45:34,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:34,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1339658866, now seen corresponding path program 1 times [2018-11-12 18:45:34,970 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:45:34,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:34,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:45:34,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:34,972 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:45:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:45:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 320 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:45:35,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:45:35,640 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:45:35,640 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 372 with the following transitions: [2018-11-12 18:45:35,641 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [657], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:45:35,645 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:45:35,645 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:45:35,778 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:45:37,118 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:45:37,119 INFO L272 AbstractInterpreter]: Visited 137 different actions 678 times. Merged at 8 different actions 41 times. Widened at 1 different actions 1 times. Performed 10647 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10647 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:45:37,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:37,125 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:45:37,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:45:37,125 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 18:45:37,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:45:37,135 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:45:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:45:37,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:45:37,477 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2018-11-12 18:45:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2018-11-12 18:45:37,660 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:45:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2018-11-12 18:45:37,810 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:45:37,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2018-11-12 18:45:37,810 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:45:37,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:45:37,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:45:37,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:45:37,811 INFO L87 Difference]: Start difference. First operand 28143 states and 38001 transitions. Second operand 3 states. [2018-11-12 18:45:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:45:47,315 INFO L93 Difference]: Finished difference Result 56793 states and 79004 transitions. [2018-11-12 18:45:47,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:45:47,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 371 [2018-11-12 18:45:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:45:47,459 INFO L225 Difference]: With dead ends: 56793 [2018-11-12 18:45:47,459 INFO L226 Difference]: Without dead ends: 30914 [2018-11-12 18:45:47,602 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 741 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:45:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30914 states. [2018-11-12 18:45:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30914 to 30141. [2018-11-12 18:45:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30141 states. [2018-11-12 18:45:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30141 states to 30141 states and 40610 transitions. [2018-11-12 18:45:48,332 INFO L78 Accepts]: Start accepts. Automaton has 30141 states and 40610 transitions. Word has length 371 [2018-11-12 18:45:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:45:48,333 INFO L480 AbstractCegarLoop]: Abstraction has 30141 states and 40610 transitions. [2018-11-12 18:45:48,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:45:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 30141 states and 40610 transitions. [2018-11-12 18:45:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2018-11-12 18:45:48,419 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:45:48,419 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:45:48,419 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:45:48,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:48,420 INFO L82 PathProgramCache]: Analyzing trace with hash 152812171, now seen corresponding path program 1 times [2018-11-12 18:45:48,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:45:48,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:48,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:45:48,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:45:48,421 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:45:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:45:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:45:49,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:45:49,265 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:45:49,265 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 401 with the following transitions: [2018-11-12 18:45:49,266 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [815], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:45:49,269 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:45:49,269 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:45:49,463 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:45:50,295 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:45:50,296 INFO L272 AbstractInterpreter]: Visited 147 different actions 577 times. Merged at 7 different actions 22 times. Never widened. Performed 10506 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10506 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:45:50,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:45:50,304 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:45:50,862 INFO L227 lantSequenceWeakener]: Weakened 397 states. On average, predicates are now at 75.27% of their original sizes. [2018-11-12 18:45:50,862 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:45:50,951 INFO L415 sIntCurrentIteration]: We unified 399 AI predicates to 399 [2018-11-12 18:45:50,951 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:45:50,951 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:45:50,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-12 18:45:50,952 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:45:50,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 18:45:50,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 18:45:50,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:45:50,953 INFO L87 Difference]: Start difference. First operand 30141 states and 40610 transitions. Second operand 10 states. [2018-11-12 18:46:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:46:02,965 INFO L93 Difference]: Finished difference Result 71443 states and 98997 transitions. [2018-11-12 18:46:02,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:46:02,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 400 [2018-11-12 18:46:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:46:03,128 INFO L225 Difference]: With dead ends: 71443 [2018-11-12 18:46:03,129 INFO L226 Difference]: Without dead ends: 42462 [2018-11-12 18:46:03,298 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 407 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 18:46:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42462 states. [2018-11-12 18:46:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42462 to 42289. [2018-11-12 18:46:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42289 states. [2018-11-12 18:46:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42289 states to 42289 states and 55926 transitions. [2018-11-12 18:46:04,166 INFO L78 Accepts]: Start accepts. Automaton has 42289 states and 55926 transitions. Word has length 400 [2018-11-12 18:46:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:46:04,167 INFO L480 AbstractCegarLoop]: Abstraction has 42289 states and 55926 transitions. [2018-11-12 18:46:04,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 18:46:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 42289 states and 55926 transitions. [2018-11-12 18:46:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-11-12 18:46:04,262 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:46:04,262 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:46:04,262 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:46:04,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:46:04,263 INFO L82 PathProgramCache]: Analyzing trace with hash 15972197, now seen corresponding path program 1 times [2018-11-12 18:46:04,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:46:04,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:46:04,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:46:04,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:46:04,264 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:46:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:46:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 129 proven. 213 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 18:46:05,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:46:05,407 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:46:05,407 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 406 with the following transitions: [2018-11-12 18:46:05,407 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [785], [789], [793], [797], [808], [812], [815], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:46:05,410 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:46:05,410 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:46:05,490 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:46:06,195 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:46:06,195 INFO L272 AbstractInterpreter]: Visited 149 different actions 584 times. Merged at 7 different actions 21 times. Never widened. Performed 9542 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9542 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:46:06,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:46:06,204 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:46:06,765 INFO L227 lantSequenceWeakener]: Weakened 402 states. On average, predicates are now at 75.18% of their original sizes. [2018-11-12 18:46:06,765 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:46:06,922 INFO L415 sIntCurrentIteration]: We unified 404 AI predicates to 404 [2018-11-12 18:46:06,923 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:46:06,923 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:46:06,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2018-11-12 18:46:06,923 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:46:06,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 18:46:06,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 18:46:06,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-12 18:46:06,925 INFO L87 Difference]: Start difference. First operand 42289 states and 55926 transitions. Second operand 13 states. Received shutdown request... [2018-11-12 18:46:37,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-12 18:46:37,653 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 18:46:37,658 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 18:46:37,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 06:46:37 BoogieIcfgContainer [2018-11-12 18:46:37,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 18:46:37,660 INFO L168 Benchmark]: Toolchain (without parser) took 217134.54 ms. Allocated memory was 1.5 GB in the beginning and 4.6 GB in the end (delta: 3.0 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-11-12 18:46:37,661 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-11-12 18:46:37,661 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1009.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-11-12 18:46:37,662 INFO L168 Benchmark]: Boogie Procedure Inliner took 197.87 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 766.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -863.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2018-11-12 18:46:37,663 INFO L168 Benchmark]: Boogie Preprocessor took 121.39 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 18:46:37,663 INFO L168 Benchmark]: RCFGBuilder took 4470.34 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: 174.3 MB). Peak memory consumption was 174.3 MB. Max. memory is 7.1 GB. [2018-11-12 18:46:37,664 INFO L168 Benchmark]: TraceAbstraction took 211330.84 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.2 GB). Free memory was 2.1 GB in the beginning and 2.8 GB in the end (delta: -693.2 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-11-12 18:46:37,668 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1009.10 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 197.87 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 766.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -863.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.39 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4470.34 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: 174.3 MB). Peak memory consumption was 174.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 211330.84 ms. Allocated memory was 2.3 GB in the beginning and 4.6 GB in the end (delta: 2.2 GB). Free memory was 2.1 GB in the beginning and 2.8 GB in the end (delta: -693.2 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 129]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 129). Cancelled while BasicCegarLoop was constructing difference of abstraction (42289states) and FLOYD_HOARE automaton (currently 35 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (81764 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 211.2s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 178.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3212 SDtfs, 14134 SDslu, 4410 SDs, 0 SdLazy, 28187 SolverSat, 4609 SolverUnsat, 65 SolverUnknown, 0 SolverNotchecked, 86.4s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 4044 GetRequests, 3822 SyntacticMatches, 10 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 14.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42289occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.9s AbstIntTime, 9 AbstIntIterations, 6 AbstIntStrong, 0.9977232053528048 AbsIntWeakeningRatio, 0.09945054945054944 AbsIntAvgWeakeningVarsNumRemoved, 22.79725274725275 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.9s AutomataMinimizationTime, 12 MinimizatonAttempts, 5602 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 4558 NumberOfCodeBlocks, 4558 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 5559 ConstructedInterpolants, 47 QuantifiedInterpolants, 5279837 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 19 InterpolantComputations, 6 PerfectInterpolantSequences, 4278/4835 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown