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_label46_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:51:12,620 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:51:12,623 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:51:12,636 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:51:12,637 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:51:12,638 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:51:12,639 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:51:12,641 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:51:12,642 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:51:12,643 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:51:12,644 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:51:12,645 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:51:12,646 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:51:12,647 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:51:12,648 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:51:12,649 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:51:12,650 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:51:12,652 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:51:12,654 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:51:12,655 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:51:12,657 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:51:12,658 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:51:12,661 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:51:12,661 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:51:12,661 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:51:12,662 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:51:12,663 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:51:12,664 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:51:12,665 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:51:12,666 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:51:12,667 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:51:12,668 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:51:12,668 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:51:12,668 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:51:12,669 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:51:12,670 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:51:12,670 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 16:51:12,691 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:51:12,692 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:51:12,694 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:51:12,697 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:51:12,697 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:51:12,697 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:51:12,698 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:51:12,698 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:51:12,698 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:51:12,698 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:51:12,698 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:51:12,698 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:51:12,699 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:51:12,699 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:51:12,700 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:51:12,700 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:51:12,700 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:51:12,700 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:51:12,700 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:51:12,701 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:51:12,701 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:51:12,701 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:51:12,701 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:51:12,701 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:51:12,702 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:51:12,702 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:51:12,702 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:51:12,702 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:51:12,702 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:51:12,703 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:51:12,703 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:51:12,703 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:51:12,703 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:51:12,703 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:51:12,704 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:51:12,762 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:51:12,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:51:12,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:51:12,781 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:51:12,782 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:51:12,783 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label46_false-unreach-call.c [2018-11-12 16:51:12,850 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be281ab59/60e2eece5be94e899164de0e2384f500/FLAG3902a2abb [2018-11-12 16:51:13,619 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:51:13,620 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label46_false-unreach-call.c [2018-11-12 16:51:13,646 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be281ab59/60e2eece5be94e899164de0e2384f500/FLAG3902a2abb [2018-11-12 16:51:13,662 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be281ab59/60e2eece5be94e899164de0e2384f500 [2018-11-12 16:51:13,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:51:13,678 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:51:13,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:51:13,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:51:13,685 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:51:13,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:51:13" (1/1) ... [2018-11-12 16:51:13,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ceffb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:13, skipping insertion in model container [2018-11-12 16:51:13,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:51:13" (1/1) ... [2018-11-12 16:51:13,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:51:13,831 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:51:14,862 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:51:14,867 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:51:15,252 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:51:15,278 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:51:15,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15 WrapperNode [2018-11-12 16:51:15,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:51:15,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:51:15,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:51:15,280 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:51:15,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... [2018-11-12 16:51:15,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... [2018-11-12 16:51:15,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:51:15,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:51:15,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:51:15,586 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:51:15,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... [2018-11-12 16:51:15,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... [2018-11-12 16:51:15,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... [2018-11-12 16:51:15,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... [2018-11-12 16:51:15,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... [2018-11-12 16:51:15,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... [2018-11-12 16:51:15,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... [2018-11-12 16:51:15,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:51:15,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:51:15,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:51:15,783 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:51:15,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:51:15,859 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:51:15,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:51:15,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:51:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-12 16:51:15,860 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-12 16:51:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:51:15,860 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:51:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:51:15,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:51:15,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:51:15,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:51:24,983 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:51:24,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:51:24 BoogieIcfgContainer [2018-11-12 16:51:24,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:51:24,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:51:24,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:51:24,989 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:51:24,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:51:13" (1/3) ... [2018-11-12 16:51:24,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2f886a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:51:24, skipping insertion in model container [2018-11-12 16:51:24,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:51:15" (2/3) ... [2018-11-12 16:51:24,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2f886a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:51:24, skipping insertion in model container [2018-11-12 16:51:24,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:51:24" (3/3) ... [2018-11-12 16:51:24,993 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label46_false-unreach-call.c [2018-11-12 16:51:25,003 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:51:25,013 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:51:25,030 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:51:25,079 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:51:25,080 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:51:25,080 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:51:25,080 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:51:25,080 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:51:25,080 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:51:25,080 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:51:25,081 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:51:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-12 16:51:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-12 16:51:25,136 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:51:25,137 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:51:25,139 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:51:25,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash -343464482, now seen corresponding path program 1 times [2018-11-12 16:51:25,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:51:25,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:25,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:25,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:25,205 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:51:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:25,577 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:51:25,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:51:25,577 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:51:25,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:51:25,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:51:25,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:51:25,605 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-12 16:51:36,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:51:36,667 INFO L93 Difference]: Finished difference Result 2162 states and 4007 transitions. [2018-11-12 16:51:36,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:51:36,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-12 16:51:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:51:36,701 INFO L225 Difference]: With dead ends: 2162 [2018-11-12 16:51:36,702 INFO L226 Difference]: Without dead ends: 1552 [2018-11-12 16:51:36,712 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 [2018-11-12 16:51:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2018-11-12 16:51:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1525. [2018-11-12 16:51:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1525 states. [2018-11-12 16:51:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2696 transitions. [2018-11-12 16:51:36,866 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2696 transitions. Word has length 17 [2018-11-12 16:51:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:51:36,867 INFO L480 AbstractCegarLoop]: Abstraction has 1525 states and 2696 transitions. [2018-11-12 16:51:36,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:51:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2696 transitions. [2018-11-12 16:51:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-12 16:51:36,873 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:51:36,873 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:51:36,874 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:51:36,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:36,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1337381359, now seen corresponding path program 1 times [2018-11-12 16:51:36,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:51:36,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:36,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:36,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:36,876 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:51:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:37,270 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:51:37,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:51:37,271 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:51:37,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:51:37,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:51:37,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:51:37,274 INFO L87 Difference]: Start difference. First operand 1525 states and 2696 transitions. Second operand 6 states. [2018-11-12 16:51:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:51:48,982 INFO L93 Difference]: Finished difference Result 5788 states and 10671 transitions. [2018-11-12 16:51:48,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:51:48,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2018-11-12 16:51:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:51:49,017 INFO L225 Difference]: With dead ends: 5788 [2018-11-12 16:51:49,017 INFO L226 Difference]: Without dead ends: 4269 [2018-11-12 16:51:49,037 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:51:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2018-11-12 16:51:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 4242. [2018-11-12 16:51:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4242 states. [2018-11-12 16:51:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4242 states to 4242 states and 6350 transitions. [2018-11-12 16:51:49,179 INFO L78 Accepts]: Start accepts. Automaton has 4242 states and 6350 transitions. Word has length 96 [2018-11-12 16:51:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:51:49,180 INFO L480 AbstractCegarLoop]: Abstraction has 4242 states and 6350 transitions. [2018-11-12 16:51:49,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:51:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4242 states and 6350 transitions. [2018-11-12 16:51:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-12 16:51:49,184 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:51:49,184 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:51:49,185 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:51:49,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1716529983, now seen corresponding path program 1 times [2018-11-12 16:51:49,185 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:51:49,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:49,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:49,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:49,187 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:51:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:49,432 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:51:49,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:51:49,433 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:51:49,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:51:49,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:51:49,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:51:49,434 INFO L87 Difference]: Start difference. First operand 4242 states and 6350 transitions. Second operand 6 states. [2018-11-12 16:51:55,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:51:55,143 INFO L93 Difference]: Finished difference Result 12268 states and 20056 transitions. [2018-11-12 16:51:55,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:51:55,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2018-11-12 16:51:55,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:51:55,209 INFO L225 Difference]: With dead ends: 12268 [2018-11-12 16:51:55,210 INFO L226 Difference]: Without dead ends: 8032 [2018-11-12 16:51:55,236 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 [2018-11-12 16:51:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8032 states. [2018-11-12 16:51:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8032 to 7947. [2018-11-12 16:51:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7947 states. [2018-11-12 16:51:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7947 states to 7947 states and 11973 transitions. [2018-11-12 16:51:55,512 INFO L78 Accepts]: Start accepts. Automaton has 7947 states and 11973 transitions. Word has length 97 [2018-11-12 16:51:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:51:55,513 INFO L480 AbstractCegarLoop]: Abstraction has 7947 states and 11973 transitions. [2018-11-12 16:51:55,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:51:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand 7947 states and 11973 transitions. [2018-11-12 16:51:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-11-12 16:51:55,518 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:51:55,518 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:51:55,518 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:51:55,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:55,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1743474682, now seen corresponding path program 1 times [2018-11-12 16:51:55,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:51:55,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:55,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:55,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:55,520 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:51:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:55,902 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:51:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-12 16:51:56,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:56,343 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:51:56,344 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 172 with the following transitions: [2018-11-12 16:51:56,349 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [746], [748], [751], [759], [767], [775], [783], [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], [1239], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:51:56,437 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:51:56,437 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:51:56,895 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:51:57,848 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:51:57,850 INFO L272 AbstractInterpreter]: Visited 88 different actions 250 times. Merged at 5 different actions 9 times. Never widened. Performed 4142 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4142 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 16:51:57,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:57,897 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:51:57,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:57,897 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:51:57,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:57,915 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:51:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:58,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:51:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:58,368 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:51:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:58,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:51:58,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 16:51:58,739 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:51:58,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:51:58,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:51:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-12 16:51:58,741 INFO L87 Difference]: Start difference. First operand 7947 states and 11973 transitions. Second operand 9 states. [2018-11-12 16:52:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:52:06,999 INFO L93 Difference]: Finished difference Result 19988 states and 30433 transitions. [2018-11-12 16:52:07,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 16:52:07,000 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 171 [2018-11-12 16:52:07,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:52:07,103 INFO L225 Difference]: With dead ends: 19988 [2018-11-12 16:52:07,103 INFO L226 Difference]: Without dead ends: 12012 [2018-11-12 16:52:07,163 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 340 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:52:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12012 states. [2018-11-12 16:52:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12012 to 11987. [2018-11-12 16:52:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11987 states. [2018-11-12 16:52:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11987 states to 11987 states and 15421 transitions. [2018-11-12 16:52:07,511 INFO L78 Accepts]: Start accepts. Automaton has 11987 states and 15421 transitions. Word has length 171 [2018-11-12 16:52:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:52:07,512 INFO L480 AbstractCegarLoop]: Abstraction has 11987 states and 15421 transitions. [2018-11-12 16:52:07,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:52:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 11987 states and 15421 transitions. [2018-11-12 16:52:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-11-12 16:52:07,516 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:52:07,516 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:52:07,517 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:52:07,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:52:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1229647360, now seen corresponding path program 1 times [2018-11-12 16:52:07,517 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:52:07,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:52:07,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:52:07,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:52:07,519 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:52:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:52:07,829 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:52:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 74 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-12 16:52:08,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:52:08,618 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:52:08,618 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 185 with the following transitions: [2018-11-12 16:52:08,618 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [746], [748], [751], [759], [767], [775], [783], [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], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:52:08,624 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:52:08,624 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:52:08,739 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:52:09,869 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:52:09,869 INFO L272 AbstractInterpreter]: Visited 97 different actions 375 times. Merged at 7 different actions 22 times. Never widened. Performed 6798 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6798 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 16:52:09,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:52:09,910 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:52:09,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:52:09,911 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:52:09,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:52:09,923 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:52:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:52:10,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:52:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-12 16:52:10,090 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:52:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-12 16:52:10,384 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:52:10,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-12 16:52:10,384 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:52:10,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:52:10,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:52:10,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:52:10,386 INFO L87 Difference]: Start difference. First operand 11987 states and 15421 transitions. Second operand 3 states. [2018-11-12 16:52:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:52:13,677 INFO L93 Difference]: Finished difference Result 23968 states and 30836 transitions. [2018-11-12 16:52:13,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:52:13,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2018-11-12 16:52:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:52:13,725 INFO L225 Difference]: With dead ends: 23968 [2018-11-12 16:52:13,725 INFO L226 Difference]: Without dead ends: 11987 [2018-11-12 16:52:13,768 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 368 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:52:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11987 states. [2018-11-12 16:52:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11987 to 11987. [2018-11-12 16:52:14,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11987 states. [2018-11-12 16:52:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11987 states to 11987 states and 14818 transitions. [2018-11-12 16:52:14,036 INFO L78 Accepts]: Start accepts. Automaton has 11987 states and 14818 transitions. Word has length 184 [2018-11-12 16:52:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:52:14,036 INFO L480 AbstractCegarLoop]: Abstraction has 11987 states and 14818 transitions. [2018-11-12 16:52:14,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:52:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 11987 states and 14818 transitions. [2018-11-12 16:52:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-11-12 16:52:14,043 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:52:14,043 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:52:14,043 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:52:14,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:52:14,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1949496289, now seen corresponding path program 1 times [2018-11-12 16:52:14,044 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:52:14,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:52:14,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:52:14,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:52:14,045 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:52:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:52:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-12 16:52:14,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:52:14,518 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:52:14,518 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 248 with the following transitions: [2018-11-12 16:52:14,519 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [746], [748], [751], [759], [767], [775], [783], [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], [1547], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:52:14,525 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:52:14,525 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:52:14,626 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:52:17,638 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:52:17,638 INFO L272 AbstractInterpreter]: Visited 151 different actions 1031 times. Merged at 7 different actions 43 times. Widened at 1 different actions 2 times. Performed 21142 root evaluator evaluations with a maximum evaluation depth of 6. Performed 21142 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 7 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 16:52:17,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:52:17,678 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:52:17,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:52:17,678 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:52:17,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:52:17,692 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:52:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:52:17,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:52:18,493 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 16:52:19,075 WARN L179 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-11-12 16:52:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-11-12 16:52:19,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:52:19,522 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-12 16:52:19,779 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2018-11-12 16:52:20,394 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2018-11-12 16:52:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:52:21,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:52:21,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2018-11-12 16:52:21,241 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:52:21,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-12 16:52:21,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-12 16:52:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:52:21,243 INFO L87 Difference]: Start difference. First operand 11987 states and 14818 transitions. Second operand 12 states. [2018-11-12 16:53:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:53:08,699 INFO L93 Difference]: Finished difference Result 57930 states and 79128 transitions. [2018-11-12 16:53:08,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-12 16:53:08,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 247 [2018-11-12 16:53:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:53:08,936 INFO L225 Difference]: With dead ends: 57930 [2018-11-12 16:53:08,936 INFO L226 Difference]: Without dead ends: 41721 [2018-11-12 16:53:09,046 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 485 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=709, Invalid=2261, Unknown=0, NotChecked=0, Total=2970 [2018-11-12 16:53:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41721 states. [2018-11-12 16:53:10,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41721 to 36964. [2018-11-12 16:53:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36964 states. [2018-11-12 16:53:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36964 states to 36964 states and 49822 transitions. [2018-11-12 16:53:10,849 INFO L78 Accepts]: Start accepts. Automaton has 36964 states and 49822 transitions. Word has length 247 [2018-11-12 16:53:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:53:10,849 INFO L480 AbstractCegarLoop]: Abstraction has 36964 states and 49822 transitions. [2018-11-12 16:53:10,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-12 16:53:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 36964 states and 49822 transitions. [2018-11-12 16:53:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-11-12 16:53:10,863 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:53:10,863 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:53:10,864 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:53:10,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:53:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1021939754, now seen corresponding path program 1 times [2018-11-12 16:53:10,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:53:10,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:53:10,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:53:10,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:53:10,865 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:53:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:53:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:53:11,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:53:11,441 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:53:11,441 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 249 with the following transitions: [2018-11-12 16:53:11,441 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [746], [748], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [923], [925], [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], [1547], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:53:11,447 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:53:11,448 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:53:11,528 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:53:13,265 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:53:13,265 INFO L272 AbstractInterpreter]: Visited 153 different actions 897 times. Merged at 7 different actions 38 times. Widened at 1 different actions 1 times. Performed 17802 root evaluator evaluations with a maximum evaluation depth of 6. Performed 17802 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 11 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-12 16:53:13,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:53:13,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:53:13,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:53:13,275 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-12 16:53:13,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:53:13,292 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:53:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:53:13,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:53:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-11-12 16:53:13,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:53:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 55 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-12 16:53:13,703 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 16:53:13,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 3] total 8 [2018-11-12 16:53:13,703 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:53:13,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:53:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:53:13,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:53:13,705 INFO L87 Difference]: Start difference. First operand 36964 states and 49822 transitions. Second operand 3 states. [2018-11-12 16:53:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:53:22,066 INFO L93 Difference]: Finished difference Result 81416 states and 110830 transitions. [2018-11-12 16:53:22,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:53:22,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2018-11-12 16:53:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:53:22,249 INFO L225 Difference]: With dead ends: 81416 [2018-11-12 16:53:22,249 INFO L226 Difference]: Without dead ends: 39860 [2018-11-12 16:53:22,411 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:53:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39860 states. [2018-11-12 16:53:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39860 to 39045. [2018-11-12 16:53:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39045 states. [2018-11-12 16:53:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39045 states to 39045 states and 50218 transitions. [2018-11-12 16:53:23,442 INFO L78 Accepts]: Start accepts. Automaton has 39045 states and 50218 transitions. Word has length 248 [2018-11-12 16:53:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:53:23,442 INFO L480 AbstractCegarLoop]: Abstraction has 39045 states and 50218 transitions. [2018-11-12 16:53:23,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:53:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 39045 states and 50218 transitions. [2018-11-12 16:53:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-12 16:53:23,454 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:53:23,454 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:53:23,454 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:53:23,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:53:23,455 INFO L82 PathProgramCache]: Analyzing trace with hash 910397035, now seen corresponding path program 1 times [2018-11-12 16:53:23,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:53:23,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:53:23,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:53:23,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:53:23,456 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:53:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:53:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-12 16:53:23,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:53:23,811 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:53:23,812 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 262 with the following transitions: [2018-11-12 16:53:23,812 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [746], [748], [751], [759], [767], [775], [783], [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], [1231], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:53:23,815 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:53:23,815 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:53:23,868 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:53:25,048 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:53:25,048 INFO L272 AbstractInterpreter]: Visited 98 different actions 673 times. Merged at 8 different actions 56 times. Widened at 1 different actions 2 times. Performed 12924 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12924 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 16:53:25,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:53:25,084 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:53:25,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:53:25,085 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-12 16:53:25,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:53:25,097 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:53:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:53:25,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:53:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-12 16:53:25,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:53:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-11-12 16:53:26,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:53:26,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:53:26,123 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:53:26,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:53:26,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:53:26,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:53:26,124 INFO L87 Difference]: Start difference. First operand 39045 states and 50218 transitions. Second operand 7 states. [2018-11-12 16:53:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:53:35,622 INFO L93 Difference]: Finished difference Result 95657 states and 125188 transitions. [2018-11-12 16:53:35,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:53:35,623 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 261 [2018-11-12 16:53:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:53:35,824 INFO L225 Difference]: With dead ends: 95657 [2018-11-12 16:53:35,824 INFO L226 Difference]: Without dead ends: 57052 [2018-11-12 16:53:35,925 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:53:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57052 states. [2018-11-12 16:53:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57052 to 54042. [2018-11-12 16:53:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54042 states. [2018-11-12 16:53:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54042 states to 54042 states and 68844 transitions. [2018-11-12 16:53:37,301 INFO L78 Accepts]: Start accepts. Automaton has 54042 states and 68844 transitions. Word has length 261 [2018-11-12 16:53:37,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:53:37,301 INFO L480 AbstractCegarLoop]: Abstraction has 54042 states and 68844 transitions. [2018-11-12 16:53:37,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:53:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 54042 states and 68844 transitions. [2018-11-12 16:53:37,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-11-12 16:53:37,311 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:53:37,311 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:53:37,312 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:53:37,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:53:37,312 INFO L82 PathProgramCache]: Analyzing trace with hash -652302342, now seen corresponding path program 1 times [2018-11-12 16:53:37,312 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:53:37,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:53:37,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:53:37,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:53:37,313 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:53:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:53:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-12 16:53:38,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:53:38,580 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:53:38,580 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 266 with the following transitions: [2018-11-12 16:53:38,581 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [746], [748], [751], [759], [767], [775], [783], [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], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1654], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:53:38,584 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:53:38,584 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:53:38,641 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:53:39,576 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:53:39,576 INFO L272 AbstractInterpreter]: Visited 169 different actions 661 times. Merged at 7 different actions 21 times. Never widened. Performed 12281 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12281 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 16:53:39,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:53:39,613 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:53:39,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:53:39,614 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:53:39,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:53:39,626 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:53:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:53:39,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:53:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-12 16:53:39,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:53:40,571 WARN L179 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-11-12 16:53:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:53:40,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:53:40,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-11-12 16:53:40,967 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:53:40,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:53:40,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:53:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-11-12 16:53:40,968 INFO L87 Difference]: Start difference. First operand 54042 states and 68844 transitions. Second operand 10 states. [2018-11-12 16:53:56,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:53:56,111 INFO L93 Difference]: Finished difference Result 163110 states and 213671 transitions. [2018-11-12 16:53:56,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-12 16:53:56,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 265 [2018-11-12 16:53:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:53:56,443 INFO L225 Difference]: With dead ends: 163110 [2018-11-12 16:53:56,443 INFO L226 Difference]: Without dead ends: 101535 [2018-11-12 16:53:56,592 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 523 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2018-11-12 16:53:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101535 states. [2018-11-12 16:53:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101535 to 91149. [2018-11-12 16:53:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91149 states. [2018-11-12 16:53:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91149 states to 91149 states and 116499 transitions. [2018-11-12 16:53:59,176 INFO L78 Accepts]: Start accepts. Automaton has 91149 states and 116499 transitions. Word has length 265 [2018-11-12 16:53:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:53:59,177 INFO L480 AbstractCegarLoop]: Abstraction has 91149 states and 116499 transitions. [2018-11-12 16:53:59,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:53:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 91149 states and 116499 transitions. [2018-11-12 16:53:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-11-12 16:53:59,202 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:53:59,202 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-12 16:53:59,203 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:53:59,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:53:59,203 INFO L82 PathProgramCache]: Analyzing trace with hash -594199652, now seen corresponding path program 1 times [2018-11-12 16:53:59,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:53:59,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:53:59,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:53:59,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:53:59,208 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:53:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:54:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-11-12 16:54:00,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:54:00,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:54:00,615 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:54:00,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:54:00,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:54:00,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:54:00,616 INFO L87 Difference]: Start difference. First operand 91149 states and 116499 transitions. Second operand 4 states. [2018-11-12 16:54:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:54:08,490 INFO L93 Difference]: Finished difference Result 228154 states and 294024 transitions. [2018-11-12 16:54:08,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:54:08,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2018-11-12 16:54:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:54:08,862 INFO L225 Difference]: With dead ends: 228154 [2018-11-12 16:54:08,862 INFO L226 Difference]: Without dead ends: 109643 [2018-11-12 16:54:09,137 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:54:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109643 states. [2018-11-12 16:54:11,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109643 to 102014. [2018-11-12 16:54:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102014 states. [2018-11-12 16:54:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102014 states to 102014 states and 128552 transitions. [2018-11-12 16:54:12,169 INFO L78 Accepts]: Start accepts. Automaton has 102014 states and 128552 transitions. Word has length 344 [2018-11-12 16:54:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:54:12,170 INFO L480 AbstractCegarLoop]: Abstraction has 102014 states and 128552 transitions. [2018-11-12 16:54:12,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:54:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 102014 states and 128552 transitions. [2018-11-12 16:54:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2018-11-12 16:54:12,186 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:54:12,187 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-12 16:54:12,187 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:54:12,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:54:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash 732042042, now seen corresponding path program 1 times [2018-11-12 16:54:12,188 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:54:12,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:54:12,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:54:12,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:54:12,189 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:54:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:54:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 36 proven. 192 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-12 16:54:12,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:54:12,744 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:54:12,744 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 374 with the following transitions: [2018-11-12 16:54:12,745 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [746], [748], [751], [759], [767], [775], [783], [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], [1654], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:54:12,748 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:54:12,749 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:54:12,803 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:54:14,370 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:54:14,371 INFO L272 AbstractInterpreter]: Visited 170 different actions 1012 times. Merged at 8 different actions 51 times. Widened at 1 different actions 2 times. Performed 19608 root evaluator evaluations with a maximum evaluation depth of 6. Performed 19608 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 11 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-12 16:54:14,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:54:14,377 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:54:14,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:54:14,377 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:54:14,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:54:14,386 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:54:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:54:14,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:54:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 227 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 16:54:14,658 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:54:15,417 WARN L179 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-11-12 16:54:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 227 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 16:54:15,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:54:15,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-12 16:54:15,676 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:54:15,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:54:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:54:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:54:15,678 INFO L87 Difference]: Start difference. First operand 102014 states and 128552 transitions. Second operand 10 states. [2018-11-12 16:54:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:54:29,268 INFO L93 Difference]: Finished difference Result 257302 states and 320598 transitions. [2018-11-12 16:54:29,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-12 16:54:29,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 373 [2018-11-12 16:54:29,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:54:29,767 INFO L225 Difference]: With dead ends: 257302 [2018-11-12 16:54:29,767 INFO L226 Difference]: Without dead ends: 140744 [2018-11-12 16:54:29,995 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 757 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2018-11-12 16:54:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140744 states. [2018-11-12 16:54:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140744 to 124889. [2018-11-12 16:54:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124889 states. [2018-11-12 16:54:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124889 states to 124889 states and 153904 transitions. [2018-11-12 16:54:33,071 INFO L78 Accepts]: Start accepts. Automaton has 124889 states and 153904 transitions. Word has length 373 [2018-11-12 16:54:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:54:33,072 INFO L480 AbstractCegarLoop]: Abstraction has 124889 states and 153904 transitions. [2018-11-12 16:54:33,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:54:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 124889 states and 153904 transitions. [2018-11-12 16:54:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-11-12 16:54:33,084 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:54:33,084 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-11-12 16:54:33,084 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:54:33,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:54:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1145529246, now seen corresponding path program 1 times [2018-11-12 16:54:33,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:54:33,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:54:33,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:54:33,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:54:33,086 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:54:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:54:33,887 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-11-12 16:54:34,323 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 16:54:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 34 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:54:34,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:54:34,829 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:54:34,829 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 376 with the following transitions: [2018-11-12 16:54:34,829 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [746], [748], [751], [759], [767], [775], [783], [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], [1654], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:54:34,832 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:54:34,832 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:54:34,888 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:54:36,079 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:54:36,079 INFO L272 AbstractInterpreter]: Visited 170 different actions 841 times. Merged at 8 different actions 38 times. Widened at 1 different actions 1 times. Performed 16407 root evaluator evaluations with a maximum evaluation depth of 6. Performed 16407 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 7 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-12 16:54:36,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:54:36,085 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:54:36,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:54:36,085 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:54:36,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:54:36,098 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:54:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:54:36,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:54:39,301 WARN L179 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-11-12 16:54:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 303 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-12 16:54:39,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:54:39,681 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2018-11-12 16:54:40,059 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-12 16:54:43,682 WARN L179 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-11-12 16:54:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:54:44,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:54:44,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 28 [2018-11-12 16:54:44,307 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:54:44,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-12 16:54:44,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-12 16:54:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2018-11-12 16:54:44,309 INFO L87 Difference]: Start difference. First operand 124889 states and 153904 transitions. Second operand 23 states. Received shutdown request... [2018-11-12 16:54:49,202 WARN L187 SmtUtils]: Removed 8 from assertion stack [2018-11-12 16:54:49,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-12 16:54:49,203 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:54:49,207 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:54:49,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:54:49 BoogieIcfgContainer [2018-11-12 16:54:49,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:54:49,208 INFO L168 Benchmark]: Toolchain (without parser) took 215532.47 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-11-12 16:54:49,210 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:54:49,210 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1600.21 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. [2018-11-12 16:54:49,211 INFO L168 Benchmark]: Boogie Procedure Inliner took 306.28 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 778.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -959.7 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2018-11-12 16:54:49,212 INFO L168 Benchmark]: Boogie Preprocessor took 196.18 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: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2018-11-12 16:54:49,213 INFO L168 Benchmark]: RCFGBuilder took 9201.63 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: 467.0 MB). Peak memory consumption was 467.0 MB. Max. memory is 7.1 GB. [2018-11-12 16:54:49,213 INFO L168 Benchmark]: TraceAbstraction took 204222.22 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 1.7 GB in the beginning and 3.0 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-11-12 16:54:49,219 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1600.21 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 306.28 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 778.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -959.7 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 196.18 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: 14.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9201.63 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: 467.0 MB). Peak memory consumption was 467.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204222.22 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 1.7 GB in the beginning and 3.0 GB in the end (delta: -1.3 GB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 38). Cancelled while BasicCegarLoop was constructing difference of abstraction (124889states) and FLOYD_HOARE automaton (currently 15 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 53. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 204.1s OverallTime, 12 OverallIterations, 4 TraceHistogramMax, 150.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4365 SDtfs, 32227 SDslu, 4839 SDs, 0 SdLazy, 59047 SolverSat, 9612 SolverUnsat, 279 SolverUnknown, 0 SolverNotchecked, 122.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4457 GetRequests, 4244 SyntacticMatches, 20 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 17.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124889occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 13.0s AbstIntTime, 8 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 14.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 42616 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 23.1s InterpolantComputationTime, 4802 NumberOfCodeBlocks, 4802 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 6898 ConstructedInterpolants, 291 QuantifiedInterpolants, 10896513 SizeOfPredicates, 17 NumberOfNonLiveVariables, 3801 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 28 InterpolantComputations, 7 PerfectInterpolantSequences, 3359/4569 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown