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/Problem17_label49_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:22:54,459 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:22:54,462 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:22:54,479 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:22:54,479 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:22:54,489 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:22:54,491 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:22:54,494 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:22:54,498 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:22:54,499 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:22:54,501 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:22:54,501 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:22:54,502 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:22:54,503 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:22:54,504 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:22:54,513 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:22:54,515 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:22:54,516 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:22:54,522 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:22:54,524 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:22:54,525 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:22:54,527 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:22:54,533 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:22:54,534 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:22:54,534 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:22:54,535 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:22:54,537 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:22:54,538 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:22:54,539 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:22:54,540 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:22:54,540 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:22:54,540 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:22:54,542 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:22:54,543 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:22:54,544 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:22:54,545 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:22:54,546 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 [2018-11-07 18:22:54,571 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:22:54,571 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:22:54,572 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:22:54,573 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:22:54,573 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:22:54,574 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:22:54,574 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:22:54,574 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:22:54,574 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:22:54,574 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:22:54,575 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:22:54,575 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:22:54,575 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:22:54,576 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:22:54,576 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:22:54,576 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:22:54,578 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:22:54,578 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:22:54,578 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:22:54,579 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:22:54,579 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:22:54,579 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:22:54,579 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:22:54,579 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:22:54,580 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:22:54,580 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:22:54,580 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:22:54,580 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:22:54,581 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:22:54,581 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:22:54,581 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:22:54,581 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:22:54,581 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:22:54,582 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:22:54,582 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:22:54,650 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:22:54,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:22:54,668 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:22:54,670 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:22:54,670 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:22:54,671 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label49_false-unreach-call.c [2018-11-07 18:22:54,748 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd62c28cd/f02b7e11542e4ff591138dc851f43ba1/FLAGe7023073b [2018-11-07 18:22:55,524 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:22:55,525 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label49_false-unreach-call.c [2018-11-07 18:22:55,553 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd62c28cd/f02b7e11542e4ff591138dc851f43ba1/FLAGe7023073b [2018-11-07 18:22:55,572 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd62c28cd/f02b7e11542e4ff591138dc851f43ba1 [2018-11-07 18:22:55,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:22:55,587 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:22:55,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:22:55,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:22:55,593 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:22:55,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:22:55" (1/1) ... [2018-11-07 18:22:55,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70c1fa53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:55, skipping insertion in model container [2018-11-07 18:22:55,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:22:55" (1/1) ... [2018-11-07 18:22:55,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:22:55,730 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:22:56,739 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:22:56,744 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:22:57,199 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:22:57,225 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:22:57,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57 WrapperNode [2018-11-07 18:22:57,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:22:57,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:22:57,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:22:57,227 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:22:57,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (1/1) ... [2018-11-07 18:22:57,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (1/1) ... [2018-11-07 18:22:57,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:22:57,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:22:57,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:22:57,488 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:22:57,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (1/1) ... [2018-11-07 18:22:57,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (1/1) ... [2018-11-07 18:22:57,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (1/1) ... [2018-11-07 18:22:57,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (1/1) ... [2018-11-07 18:22:57,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (1/1) ... [2018-11-07 18:22:57,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (1/1) ... [2018-11-07 18:22:57,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (1/1) ... [2018-11-07 18:22:57,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:22:57,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:22:57,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:22:57,749 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:22:57,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (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 [2018-11-07 18:22:57,823 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:22:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:22:57,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:22:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:22:57,824 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:22:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:22:57,825 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:22:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:22:57,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:22:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:22:57,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:23:06,726 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:23:06,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:23:06 BoogieIcfgContainer [2018-11-07 18:23:06,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:23:06,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:23:06,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:23:06,731 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:23:06,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:22:55" (1/3) ... [2018-11-07 18:23:06,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406fce99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:23:06, skipping insertion in model container [2018-11-07 18:23:06,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:22:57" (2/3) ... [2018-11-07 18:23:06,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406fce99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:23:06, skipping insertion in model container [2018-11-07 18:23:06,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:23:06" (3/3) ... [2018-11-07 18:23:06,735 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label49_false-unreach-call.c [2018-11-07 18:23:06,745 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:23:06,753 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:23:06,770 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:23:06,814 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:23:06,814 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:23:06,815 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:23:06,815 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:23:06,815 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:23:06,815 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:23:06,815 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:23:06,815 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:23:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 18:23:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-07 18:23:06,860 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:23:06,861 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] [2018-11-07 18:23:06,863 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:23:06,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:23:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash -549765852, now seen corresponding path program 1 times [2018-11-07 18:23:06,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:23:06,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:06,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:23:06,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:06,926 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:23:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:23:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:23:07,309 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:23:07,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:23:07,310 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:23:07,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:23:07,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:23:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:23:07,339 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 18:23:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:23:17,174 INFO L93 Difference]: Finished difference Result 2166 states and 4013 transitions. [2018-11-07 18:23:17,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:23:17,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2018-11-07 18:23:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:23:17,228 INFO L225 Difference]: With dead ends: 2166 [2018-11-07 18:23:17,228 INFO L226 Difference]: Without dead ends: 1556 [2018-11-07 18:23:17,241 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:23:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2018-11-07 18:23:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1068. [2018-11-07 18:23:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-11-07 18:23:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1850 transitions. [2018-11-07 18:23:17,408 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1850 transitions. Word has length 22 [2018-11-07 18:23:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:23:17,409 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 1850 transitions. [2018-11-07 18:23:17,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:23:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1850 transitions. [2018-11-07 18:23:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-07 18:23:17,420 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:23:17,420 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:23:17,422 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:23:17,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:23:17,423 INFO L82 PathProgramCache]: Analyzing trace with hash -157307670, now seen corresponding path program 1 times [2018-11-07 18:23:17,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:23:17,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:17,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:23:17,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:17,426 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:23:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:23:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:23:17,781 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:23:17,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:23:17,782 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:23:17,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:23:17,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:23:17,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:23:17,785 INFO L87 Difference]: Start difference. First operand 1068 states and 1850 transitions. Second operand 6 states. [2018-11-07 18:23:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:23:24,828 INFO L93 Difference]: Finished difference Result 3059 states and 5419 transitions. [2018-11-07 18:23:24,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:23:24,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2018-11-07 18:23:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:23:24,856 INFO L225 Difference]: With dead ends: 3059 [2018-11-07 18:23:24,856 INFO L226 Difference]: Without dead ends: 1997 [2018-11-07 18:23:24,861 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:23:24,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-11-07 18:23:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1975. [2018-11-07 18:23:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2018-11-07 18:23:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3181 transitions. [2018-11-07 18:23:24,938 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3181 transitions. Word has length 98 [2018-11-07 18:23:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:23:24,938 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 3181 transitions. [2018-11-07 18:23:24,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:23:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3181 transitions. [2018-11-07 18:23:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-07 18:23:24,946 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:23:24,946 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:23:24,946 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:23:24,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:23:24,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1941736734, now seen corresponding path program 1 times [2018-11-07 18:23:24,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:23:24,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:24,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:23:24,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:24,949 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:23:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:23:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:23:25,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:23:25,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:23:25,179 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:23:25,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:23:25,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:23:25,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:23:25,181 INFO L87 Difference]: Start difference. First operand 1975 states and 3181 transitions. Second operand 6 states. [2018-11-07 18:23:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:23:29,237 INFO L93 Difference]: Finished difference Result 4880 states and 7834 transitions. [2018-11-07 18:23:29,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:23:29,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2018-11-07 18:23:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:23:29,258 INFO L225 Difference]: With dead ends: 4880 [2018-11-07 18:23:29,259 INFO L226 Difference]: Without dead ends: 2911 [2018-11-07 18:23:29,267 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:23:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-11-07 18:23:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2880. [2018-11-07 18:23:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-11-07 18:23:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2018-11-07 18:23:29,347 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 102 [2018-11-07 18:23:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:23:29,347 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2018-11-07 18:23:29,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:23:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2018-11-07 18:23:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-07 18:23:29,350 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:23:29,351 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:23:29,351 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:23:29,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:23:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash 927500415, now seen corresponding path program 1 times [2018-11-07 18:23:29,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:23:29,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:29,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:23:29,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:29,353 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:23:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:23:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:23:29,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:23:29,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:23:29,604 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:23:29,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:23:29,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:23:29,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:23:29,605 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 transitions. Second operand 4 states. [2018-11-07 18:23:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:23:34,319 INFO L93 Difference]: Finished difference Result 5754 states and 7882 transitions. [2018-11-07 18:23:34,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:23:34,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2018-11-07 18:23:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:23:34,334 INFO L225 Difference]: With dead ends: 5754 [2018-11-07 18:23:34,334 INFO L226 Difference]: Without dead ends: 2880 [2018-11-07 18:23:34,346 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 [2018-11-07 18:23:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2018-11-07 18:23:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2880. [2018-11-07 18:23:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-11-07 18:23:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3720 transitions. [2018-11-07 18:23:34,414 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3720 transitions. Word has length 132 [2018-11-07 18:23:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:23:34,415 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3720 transitions. [2018-11-07 18:23:34,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:23:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3720 transitions. [2018-11-07 18:23:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-07 18:23:34,418 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:23:34,418 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:23:34,419 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:23:34,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:23:34,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1417902568, now seen corresponding path program 1 times [2018-11-07 18:23:34,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:23:34,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:34,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:23:34,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:23:34,421 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:23:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:23:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 18:23:34,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:23:34,859 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:23:34,860 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 187 with the following transitions: [2018-11-07 18:23:34,863 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [786], [788], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:23:34,915 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:23:34,915 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:23:35,478 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:23:36,731 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:23:36,738 INFO L272 AbstractInterpreter]: Visited 97 different actions 377 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:23:36,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:23:36,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:23:36,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:23:36,791 INFO L194 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 [2018-11-07 18:23:36,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:23:36,806 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:23:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:23:36,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:23:37,392 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-07 18:23:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 18:23:37,777 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:23:38,529 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-11-07 18:23:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:23:39,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:23:39,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-11-07 18:23:39,190 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:23:39,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:23:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:23:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:23:39,192 INFO L87 Difference]: Start difference. First operand 2880 states and 3720 transitions. Second operand 10 states. [2018-11-07 18:24:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:24:03,658 INFO L93 Difference]: Finished difference Result 15017 states and 20406 transitions. [2018-11-07 18:24:03,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-07 18:24:03,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 186 [2018-11-07 18:24:03,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:24:03,741 INFO L225 Difference]: With dead ends: 15017 [2018-11-07 18:24:03,741 INFO L226 Difference]: Without dead ends: 12143 [2018-11-07 18:24:03,763 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2018-11-07 18:24:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12143 states. [2018-11-07 18:24:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12143 to 12019. [2018-11-07 18:24:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12019 states. [2018-11-07 18:24:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12019 states to 12019 states and 14911 transitions. [2018-11-07 18:24:04,118 INFO L78 Accepts]: Start accepts. Automaton has 12019 states and 14911 transitions. Word has length 186 [2018-11-07 18:24:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:24:04,119 INFO L480 AbstractCegarLoop]: Abstraction has 12019 states and 14911 transitions. [2018-11-07 18:24:04,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:24:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 12019 states and 14911 transitions. [2018-11-07 18:24:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-11-07 18:24:04,125 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:24:04,126 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:24:04,126 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:24:04,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:04,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2086441019, now seen corresponding path program 1 times [2018-11-07 18:24:04,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:24:04,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:04,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:04,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:04,129 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:24:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 18:24:04,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:24:04,682 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:24:04,685 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2018-11-07 18:24:04,686 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [786], [788], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:24:04,708 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:24:04,708 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:24:04,886 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:24:04,894 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:24:04,894 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 18:24:04,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:04,939 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:24:05,373 INFO L227 lantSequenceWeakener]: Weakened 199 states. On average, predicates are now at 74.99% of their original sizes. [2018-11-07 18:24:05,374 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:24:05,851 INFO L415 sIntCurrentIteration]: We unified 207 AI predicates to 207 [2018-11-07 18:24:05,852 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:24:05,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:24:05,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2018-11-07 18:24:05,853 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:24:05,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:24:05,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:24:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:24:05,855 INFO L87 Difference]: Start difference. First operand 12019 states and 14911 transitions. Second operand 8 states. [2018-11-07 18:24:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:24:33,273 INFO L93 Difference]: Finished difference Result 24468 states and 30319 transitions. [2018-11-07 18:24:33,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 18:24:33,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 208 [2018-11-07 18:24:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:24:33,328 INFO L225 Difference]: With dead ends: 24468 [2018-11-07 18:24:33,328 INFO L226 Difference]: Without dead ends: 12455 [2018-11-07 18:24:33,360 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 209 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:24:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12455 states. [2018-11-07 18:24:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12455 to 12453. [2018-11-07 18:24:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12453 states. [2018-11-07 18:24:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12453 states to 12453 states and 15359 transitions. [2018-11-07 18:24:33,648 INFO L78 Accepts]: Start accepts. Automaton has 12453 states and 15359 transitions. Word has length 208 [2018-11-07 18:24:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:24:33,649 INFO L480 AbstractCegarLoop]: Abstraction has 12453 states and 15359 transitions. [2018-11-07 18:24:33,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:24:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 12453 states and 15359 transitions. [2018-11-07 18:24:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-11-07 18:24:33,656 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:24:33,657 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:24:33,657 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:24:33,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:33,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1195661669, now seen corresponding path program 1 times [2018-11-07 18:24:33,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:24:33,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:33,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:33,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:33,660 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:24:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2018-11-07 18:24:33,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:24:33,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:24:33,965 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:24:33,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:24:33,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:24:33,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:24:33,966 INFO L87 Difference]: Start difference. First operand 12453 states and 15359 transitions. Second operand 3 states. [2018-11-07 18:24:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:24:40,414 INFO L93 Difference]: Finished difference Result 35055 states and 44931 transitions. [2018-11-07 18:24:40,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:24:40,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 283 [2018-11-07 18:24:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:24:40,499 INFO L225 Difference]: With dead ends: 35055 [2018-11-07 18:24:40,500 INFO L226 Difference]: Without dead ends: 23042 [2018-11-07 18:24:40,540 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:24:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23042 states. [2018-11-07 18:24:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23042 to 23026. [2018-11-07 18:24:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23026 states. [2018-11-07 18:24:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23026 states to 23026 states and 28913 transitions. [2018-11-07 18:24:41,128 INFO L78 Accepts]: Start accepts. Automaton has 23026 states and 28913 transitions. Word has length 283 [2018-11-07 18:24:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:24:41,128 INFO L480 AbstractCegarLoop]: Abstraction has 23026 states and 28913 transitions. [2018-11-07 18:24:41,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:24:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 23026 states and 28913 transitions. [2018-11-07 18:24:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-11-07 18:24:41,147 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:24:41,148 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:24:41,148 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:24:41,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash -70234267, now seen corresponding path program 1 times [2018-11-07 18:24:41,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:24:41,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:41,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:41,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:41,150 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:24:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:41,630 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 3 [2018-11-07 18:24:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-11-07 18:24:41,678 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:24:41,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:24:41,678 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:24:41,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:24:41,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:24:41,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:24:41,679 INFO L87 Difference]: Start difference. First operand 23026 states and 28913 transitions. Second operand 4 states. [2018-11-07 18:24:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:24:49,220 INFO L93 Difference]: Finished difference Result 61878 states and 80604 transitions. [2018-11-07 18:24:49,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:24:49,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 284 [2018-11-07 18:24:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:24:49,336 INFO L225 Difference]: With dead ends: 61878 [2018-11-07 18:24:49,337 INFO L226 Difference]: Without dead ends: 39292 [2018-11-07 18:24:49,401 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:24:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39292 states. [2018-11-07 18:24:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39292 to 36558. [2018-11-07 18:24:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36558 states. [2018-11-07 18:24:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36558 states to 36558 states and 44110 transitions. [2018-11-07 18:24:50,213 INFO L78 Accepts]: Start accepts. Automaton has 36558 states and 44110 transitions. Word has length 284 [2018-11-07 18:24:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:24:50,214 INFO L480 AbstractCegarLoop]: Abstraction has 36558 states and 44110 transitions. [2018-11-07 18:24:50,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:24:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 36558 states and 44110 transitions. [2018-11-07 18:24:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-11-07 18:24:50,240 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:24:50,240 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:24:50,241 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:24:50,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash -393330342, now seen corresponding path program 1 times [2018-11-07 18:24:50,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:24:50,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:50,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:50,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:50,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:24:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:50,809 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-11-07 18:24:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 63 proven. 168 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-11-07 18:24:52,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:24:52,584 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:24:52,585 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 387 with the following transitions: [2018-11-07 18:24:52,585 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [786], [788], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:24:52,593 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:24:52,593 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:24:52,668 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:24:53,274 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:24:53,274 INFO L272 AbstractInterpreter]: Visited 189 different actions 553 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 18:24:53,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:53,282 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:24:53,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:24:53,283 INFO L194 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 [2018-11-07 18:24:53,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:53,293 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:24:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:53,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:24:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-07 18:24:53,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:24:54,175 WARN L179 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-11-07 18:24:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 123 proven. 109 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 18:24:54,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:24:54,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 16 [2018-11-07 18:24:54,661 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:24:54,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 18:24:54,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 18:24:54,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:24:54,663 INFO L87 Difference]: Start difference. First operand 36558 states and 44110 transitions. Second operand 15 states. [2018-11-07 18:25:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:25:09,287 INFO L93 Difference]: Finished difference Result 100234 states and 121232 transitions. [2018-11-07 18:25:09,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-07 18:25:09,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 386 [2018-11-07 18:25:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:25:09,425 INFO L225 Difference]: With dead ends: 100234 [2018-11-07 18:25:09,425 INFO L226 Difference]: Without dead ends: 41710 [2018-11-07 18:25:09,537 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 830 GetRequests, 780 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2018-11-07 18:25:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41710 states. [2018-11-07 18:25:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41710 to 31603. [2018-11-07 18:25:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31603 states. [2018-11-07 18:25:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31603 states to 31603 states and 37002 transitions. [2018-11-07 18:25:10,205 INFO L78 Accepts]: Start accepts. Automaton has 31603 states and 37002 transitions. Word has length 386 [2018-11-07 18:25:10,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:25:10,206 INFO L480 AbstractCegarLoop]: Abstraction has 31603 states and 37002 transitions. [2018-11-07 18:25:10,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 18:25:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 31603 states and 37002 transitions. [2018-11-07 18:25:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-11-07 18:25:10,226 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:25:10,227 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:25:10,227 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:25:10,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:25:10,228 INFO L82 PathProgramCache]: Analyzing trace with hash 742551710, now seen corresponding path program 1 times [2018-11-07 18:25:10,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:25:10,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:10,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:25:10,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:10,230 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:25:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:25:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 51 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-07 18:25:11,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:25:11,131 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:25:11,131 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 398 with the following transitions: [2018-11-07 18:25:11,132 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [786], [788], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1376], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:25:11,143 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:25:11,143 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:25:11,486 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:25:12,934 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:25:12,934 INFO L272 AbstractInterpreter]: Visited 189 different actions 1309 times. Merged at 8 different actions 56 times. Widened at 1 different actions 2 times. Found 13 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:25:12,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:25:12,945 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:25:12,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:25:12,945 INFO L194 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 [2018-11-07 18:25:12,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:25:12,956 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:25:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:25:13,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:25:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 242 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:25:13,428 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:25:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 242 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:25:13,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:25:13,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-07 18:25:13,995 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:25:13,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:25:13,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:25:13,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:25:13,996 INFO L87 Difference]: Start difference. First operand 31603 states and 37002 transitions. Second operand 10 states. [2018-11-07 18:25:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:25:25,635 INFO L93 Difference]: Finished difference Result 88098 states and 105258 transitions. [2018-11-07 18:25:25,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-07 18:25:25,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 397 [2018-11-07 18:25:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:25:25,795 INFO L225 Difference]: With dead ends: 88098 [2018-11-07 18:25:25,795 INFO L226 Difference]: Without dead ends: 53166 [2018-11-07 18:25:25,863 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 806 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2018-11-07 18:25:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53166 states. [2018-11-07 18:25:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53166 to 48831. [2018-11-07 18:25:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48831 states. [2018-11-07 18:25:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48831 states to 48831 states and 56699 transitions. [2018-11-07 18:25:26,697 INFO L78 Accepts]: Start accepts. Automaton has 48831 states and 56699 transitions. Word has length 397 [2018-11-07 18:25:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:25:26,698 INFO L480 AbstractCegarLoop]: Abstraction has 48831 states and 56699 transitions. [2018-11-07 18:25:26,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:25:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 48831 states and 56699 transitions. [2018-11-07 18:25:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-11-07 18:25:26,711 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:25:26,712 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:25:26,712 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:25:26,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:25:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash 833866882, now seen corresponding path program 1 times [2018-11-07 18:25:26,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:25:26,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:26,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:25:26,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:26,714 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:25:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:25:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 49 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:25:27,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:25:27,864 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:25:27,864 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 400 with the following transitions: [2018-11-07 18:25:27,865 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [786], [788], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:25:27,869 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:25:27,869 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:25:27,962 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:25:30,294 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:25:30,295 INFO L272 AbstractInterpreter]: Visited 189 different actions 1500 times. Merged at 8 different actions 68 times. Widened at 1 different actions 3 times. Found 13 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 18:25:30,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:25:30,302 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:25:30,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:25:30,302 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:25:30,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:25:30,311 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:25:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:25:30,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:25:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-07 18:25:31,084 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:25:32,642 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-07 18:25:32,645 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 18:25:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 51 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:25:33,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:25:33,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 28 [2018-11-07 18:25:33,905 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:25:33,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 18:25:33,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 18:25:33,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2018-11-07 18:25:33,907 INFO L87 Difference]: Start difference. First operand 48831 states and 56699 transitions. Second operand 23 states. [2018-11-07 18:25:51,027 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2018-11-07 18:25:52,156 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2018-11-07 18:25:53,228 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2018-11-07 18:26:04,281 WARN L179 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2018-11-07 18:26:07,190 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2018-11-07 18:26:09,112 WARN L179 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-07 18:26:13,791 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2018-11-07 18:26:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:26:21,628 INFO L93 Difference]: Finished difference Result 145424 states and 178071 transitions. [2018-11-07 18:26:21,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-11-07 18:26:21,637 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 399 [2018-11-07 18:26:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:26:22,043 INFO L225 Difference]: With dead ends: 145424 [2018-11-07 18:26:22,043 INFO L226 Difference]: Without dead ends: 97040 [2018-11-07 18:26:22,155 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 787 SyntacticMatches, 6 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10336 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=3226, Invalid=24496, Unknown=0, NotChecked=0, Total=27722 [2018-11-07 18:26:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97040 states. [2018-11-07 18:26:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97040 to 88034. [2018-11-07 18:26:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88034 states. [2018-11-07 18:26:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88034 states to 88034 states and 102070 transitions. [2018-11-07 18:26:24,767 INFO L78 Accepts]: Start accepts. Automaton has 88034 states and 102070 transitions. Word has length 399 [2018-11-07 18:26:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:26:24,768 INFO L480 AbstractCegarLoop]: Abstraction has 88034 states and 102070 transitions. [2018-11-07 18:26:24,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-07 18:26:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 88034 states and 102070 transitions. [2018-11-07 18:26:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2018-11-07 18:26:24,786 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:26:24,787 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:26:24,787 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:26:24,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:26:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1172005488, now seen corresponding path program 1 times [2018-11-07 18:26:24,789 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:26:24,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:26:24,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:26:24,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:26:24,790 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:26:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:26:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 49 proven. 17 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2018-11-07 18:26:25,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:26:25,456 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:26:25,456 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 443 with the following transitions: [2018-11-07 18:26:25,457 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [786], [788], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1626], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1758], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:26:25,460 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:26:25,460 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:26:25,540 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:26:27,366 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:26:27,366 INFO L272 AbstractInterpreter]: Visited 189 different actions 1310 times. Merged at 8 different actions 57 times. Widened at 1 different actions 2 times. Found 13 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:26:27,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:26:27,372 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:26:27,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:26:27,372 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:26:27,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:26:27,380 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:26:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:26:27,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:26:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:26:28,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-11-07 18:26:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 287 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 18:26:29,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:26:29,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2018-11-07 18:26:29,233 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:26:29,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 18:26:29,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 18:26:29,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-11-07 18:26:29,235 INFO L87 Difference]: Start difference. First operand 88034 states and 102070 transitions. Second operand 11 states. [2018-11-07 18:26:29,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-07 18:26:29,236 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:26:29,241 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:26:29,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:26:29 BoogieIcfgContainer [2018-11-07 18:26:29,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:26:29,243 INFO L168 Benchmark]: Toolchain (without parser) took 213657.77 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -869.2 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-11-07 18:26:29,244 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:26:29,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1638.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:26:29,246 INFO L168 Benchmark]: Boogie Procedure Inliner took 260.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -944.6 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:26:29,246 INFO L168 Benchmark]: Boogie Preprocessor took 260.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2018-11-07 18:26:29,247 INFO L168 Benchmark]: RCFGBuilder took 8978.62 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 454.9 MB). Peak memory consumption was 454.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:26:29,248 INFO L168 Benchmark]: TraceAbstraction took 202514.25 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -530.7 MB). Peak memory consumption was 984.0 MB. Max. memory is 7.1 GB. [2018-11-07 18:26:29,253 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1638.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 260.63 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 761.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -944.6 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 260.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8978.62 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 454.9 MB). Peak memory consumption was 454.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 202514.25 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.7 GB in the beginning and 2.3 GB in the end (delta: -530.7 MB). Peak memory consumption was 984.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 53). Cancelled while BasicCegarLoop was constructing difference of abstraction (88034states) and FLOYD_HOARE automaton (currently 2 states, 11 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 202.4s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 167.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4146 SDtfs, 36811 SDslu, 5921 SDs, 0 SdLazy, 67151 SolverSat, 12165 SolverUnsat, 163 SolverUnknown, 0 SolverNotchecked, 114.7s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 4152 GetRequests, 3839 SyntacticMatches, 20 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11085 ImplicationChecksByTransitivity, 18.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88034occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.0s AbstIntTime, 6 AbstIntIterations, 1 AbstIntStrong, 0.997513732154564 AbsIntWeakeningRatio, 0.13043478260869565 AbsIntAvgWeakeningVarsNumRemoved, 18.995169082125603 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 26865 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 14.7s InterpolantComputationTime, 4749 NumberOfCodeBlocks, 4749 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 6537 ConstructedInterpolants, 205 QuantifiedInterpolants, 13416520 SizeOfPredicates, 10 NumberOfNonLiveVariables, 2944 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 22 InterpolantComputations, 6 PerfectInterpolantSequences, 3826/5029 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown