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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label13_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 09:13:59,795 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 09:13:59,797 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 09:13:59,814 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 09:13:59,814 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 09:13:59,815 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 09:13:59,817 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 09:13:59,820 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 09:13:59,822 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 09:13:59,822 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 09:13:59,823 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 09:13:59,824 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 09:13:59,825 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 09:13:59,826 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 09:13:59,827 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 09:13:59,828 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 09:13:59,829 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 09:13:59,834 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 09:13:59,838 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 09:13:59,842 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 09:13:59,844 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 09:13:59,846 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 09:13:59,851 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 09:13:59,852 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 09:13:59,852 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 09:13:59,853 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 09:13:59,854 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 09:13:59,855 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 09:13:59,859 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 09:13:59,860 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 09:13:59,861 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 09:13:59,861 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 09:13:59,864 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 09:13:59,864 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 09:13:59,865 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 09:13:59,866 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 09:13:59,866 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 09:13:59,900 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 09:13:59,900 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 09:13:59,901 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 09:13:59,901 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 09:13:59,901 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 09:13:59,902 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 09:13:59,902 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 09:13:59,903 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 09:13:59,903 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 09:13:59,903 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 09:13:59,903 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 09:13:59,903 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 09:13:59,903 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 09:13:59,904 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 09:13:59,904 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 09:13:59,906 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 09:13:59,906 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 09:13:59,906 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 09:13:59,906 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 09:13:59,906 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 09:13:59,907 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 09:13:59,907 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 09:13:59,907 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 09:13:59,907 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 09:13:59,907 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 09:13:59,909 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 09:13:59,909 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 09:13:59,909 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 09:13:59,909 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 09:13:59,910 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 09:13:59,910 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 09:13:59,910 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 09:13:59,910 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 09:13:59,910 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 09:13:59,911 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 09:13:59,911 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 09:13:59,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 09:13:59,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 09:13:59,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 09:13:59,998 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 09:13:59,998 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 09:13:59,999 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label13_true-unreach-call.c [2018-11-07 09:14:00,064 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c50dd705/85fb42493fa144d7a04a7f82d56db2f9/FLAGfffed077b [2018-11-07 09:14:00,747 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 09:14:00,748 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label13_true-unreach-call.c [2018-11-07 09:14:00,770 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c50dd705/85fb42493fa144d7a04a7f82d56db2f9/FLAGfffed077b [2018-11-07 09:14:00,791 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c50dd705/85fb42493fa144d7a04a7f82d56db2f9 [2018-11-07 09:14:00,804 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 09:14:00,806 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 09:14:00,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 09:14:00,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 09:14:00,811 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 09:14:00,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:14:00" (1/1) ... [2018-11-07 09:14:00,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d100604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:00, skipping insertion in model container [2018-11-07 09:14:00,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:14:00" (1/1) ... [2018-11-07 09:14:00,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 09:14:00,911 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 09:14:01,815 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 09:14:01,820 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 09:14:02,140 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 09:14:02,165 INFO L193 MainTranslator]: Completed translation [2018-11-07 09:14:02,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02 WrapperNode [2018-11-07 09:14:02,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 09:14:02,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 09:14:02,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 09:14:02,168 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 09:14:02,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... [2018-11-07 09:14:02,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... [2018-11-07 09:14:02,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 09:14:02,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 09:14:02,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 09:14:02,386 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 09:14:02,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... [2018-11-07 09:14:02,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... [2018-11-07 09:14:02,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... [2018-11-07 09:14:02,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... [2018-11-07 09:14:02,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... [2018-11-07 09:14:02,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... [2018-11-07 09:14:02,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... [2018-11-07 09:14:02,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 09:14:02,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 09:14:02,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 09:14:02,524 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 09:14:02,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 09:14:02,595 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 09:14:02,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 09:14:02,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 09:14:02,595 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 09:14:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 09:14:02,596 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 09:14:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 09:14:02,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 09:14:02,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 09:14:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 09:14:02,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 09:14:08,697 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 09:14:08,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:14:08 BoogieIcfgContainer [2018-11-07 09:14:08,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 09:14:08,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 09:14:08,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 09:14:08,704 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 09:14:08,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 09:14:00" (1/3) ... [2018-11-07 09:14:08,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67529a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:14:08, skipping insertion in model container [2018-11-07 09:14:08,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:14:02" (2/3) ... [2018-11-07 09:14:08,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67529a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:14:08, skipping insertion in model container [2018-11-07 09:14:08,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:14:08" (3/3) ... [2018-11-07 09:14:08,710 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label13_true-unreach-call.c [2018-11-07 09:14:08,720 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 09:14:08,732 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 09:14:08,751 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 09:14:08,808 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 09:14:08,808 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 09:14:08,808 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 09:14:08,808 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 09:14:08,809 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 09:14:08,809 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 09:14:08,809 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 09:14:08,809 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 09:14:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 09:14:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-07 09:14:08,861 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:14:08,862 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:14:08,865 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:14:08,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:14:08,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1691177667, now seen corresponding path program 1 times [2018-11-07 09:14:08,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:14:08,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:08,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:14:08,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:08,924 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:14:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:14:09,466 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 09:14:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:14:09,594 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:14:09,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 09:14:09,594 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:14:09,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 09:14:09,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 09:14:09,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 09:14:09,626 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-11-07 09:14:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:14:13,021 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-11-07 09:14:13,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 09:14:13,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2018-11-07 09:14:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:14:13,050 INFO L225 Difference]: With dead ends: 1156 [2018-11-07 09:14:13,051 INFO L226 Difference]: Without dead ends: 744 [2018-11-07 09:14:13,066 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 09:14:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-11-07 09:14:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-11-07 09:14:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 09:14:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1355 transitions. [2018-11-07 09:14:13,230 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1355 transitions. Word has length 63 [2018-11-07 09:14:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:14:13,231 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1355 transitions. [2018-11-07 09:14:13,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 09:14:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1355 transitions. [2018-11-07 09:14:13,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-11-07 09:14:13,239 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:14:13,240 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:14:13,240 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:14:13,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:14:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash 122384276, now seen corresponding path program 1 times [2018-11-07 09:14:13,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:14:13,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:13,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:14:13,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:13,243 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:14:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:14:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:14:13,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:14:13,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 09:14:13,554 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:14:13,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 09:14:13,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 09:14:13,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 09:14:13,557 INFO L87 Difference]: Start difference. First operand 744 states and 1355 transitions. Second operand 5 states. [2018-11-07 09:14:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:14:19,134 INFO L93 Difference]: Finished difference Result 2194 states and 4083 transitions. [2018-11-07 09:14:19,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 09:14:19,135 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2018-11-07 09:14:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:14:19,150 INFO L225 Difference]: With dead ends: 2194 [2018-11-07 09:14:19,150 INFO L226 Difference]: Without dead ends: 1456 [2018-11-07 09:14:19,154 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 09:14:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2018-11-07 09:14:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1436. [2018-11-07 09:14:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2018-11-07 09:14:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2550 transitions. [2018-11-07 09:14:19,226 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2550 transitions. Word has length 133 [2018-11-07 09:14:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:14:19,227 INFO L480 AbstractCegarLoop]: Abstraction has 1436 states and 2550 transitions. [2018-11-07 09:14:19,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 09:14:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2550 transitions. [2018-11-07 09:14:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-07 09:14:19,232 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:14:19,233 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:14:19,233 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:14:19,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:14:19,233 INFO L82 PathProgramCache]: Analyzing trace with hash -805750699, now seen corresponding path program 1 times [2018-11-07 09:14:19,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:14:19,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:19,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:14:19,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:19,235 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:14:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:14:19,481 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 09:14:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:14:19,560 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:14:19,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 09:14:19,561 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:14:19,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 09:14:19,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 09:14:19,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 09:14:19,562 INFO L87 Difference]: Start difference. First operand 1436 states and 2550 transitions. Second operand 6 states. [2018-11-07 09:14:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:14:24,225 INFO L93 Difference]: Finished difference Result 3936 states and 7024 transitions. [2018-11-07 09:14:24,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 09:14:24,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2018-11-07 09:14:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:14:24,252 INFO L225 Difference]: With dead ends: 3936 [2018-11-07 09:14:24,252 INFO L226 Difference]: Without dead ends: 2506 [2018-11-07 09:14:24,263 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 09:14:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2018-11-07 09:14:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2479. [2018-11-07 09:14:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2479 states. [2018-11-07 09:14:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3996 transitions. [2018-11-07 09:14:24,354 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3996 transitions. Word has length 162 [2018-11-07 09:14:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:14:24,355 INFO L480 AbstractCegarLoop]: Abstraction has 2479 states and 3996 transitions. [2018-11-07 09:14:24,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 09:14:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3996 transitions. [2018-11-07 09:14:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-11-07 09:14:24,361 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:14:24,361 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:14:24,363 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:14:24,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:14:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash -914566951, now seen corresponding path program 1 times [2018-11-07 09:14:24,363 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:14:24,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:24,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:14:24,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:24,365 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:14:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:14:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 09:14:24,644 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 09:14:24,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 09:14:24,644 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:14:24,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 09:14:24,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 09:14:24,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 09:14:24,646 INFO L87 Difference]: Start difference. First operand 2479 states and 3996 transitions. Second operand 6 states. [2018-11-07 09:14:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:14:27,665 INFO L93 Difference]: Finished difference Result 6050 states and 9896 transitions. [2018-11-07 09:14:27,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 09:14:27,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2018-11-07 09:14:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:14:27,692 INFO L225 Difference]: With dead ends: 6050 [2018-11-07 09:14:27,693 INFO L226 Difference]: Without dead ends: 3577 [2018-11-07 09:14:27,704 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 09:14:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2018-11-07 09:14:27,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 3545. [2018-11-07 09:14:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3545 states. [2018-11-07 09:14:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 4965 transitions. [2018-11-07 09:14:27,808 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 4965 transitions. Word has length 180 [2018-11-07 09:14:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:14:27,809 INFO L480 AbstractCegarLoop]: Abstraction has 3545 states and 4965 transitions. [2018-11-07 09:14:27,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 09:14:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 4965 transitions. [2018-11-07 09:14:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-11-07 09:14:27,813 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:14:27,814 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:14:27,814 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:14:27,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:14:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash -819200035, now seen corresponding path program 1 times [2018-11-07 09:14:27,815 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:14:27,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:27,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:14:27,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:14:27,816 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:14:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:14:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 123 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 09:14:28,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:14:28,227 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:14:28,228 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 264 with the following transitions: [2018-11-07 09:14:28,231 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [583], [585], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 09:14:28,287 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:14:28,287 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:14:28,962 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 09:14:28,965 INFO L272 AbstractInterpreter]: Visited 135 different actions 135 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 09:14:29,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:14:29,008 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 09:14:29,562 INFO L227 lantSequenceWeakener]: Weakened 254 states. On average, predicates are now at 78.11% of their original sizes. [2018-11-07 09:14:29,562 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 09:14:29,820 INFO L415 sIntCurrentIteration]: We unified 262 AI predicates to 262 [2018-11-07 09:14:29,820 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 09:14:29,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:14:29,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2018-11-07 09:14:29,822 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:14:29,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 09:14:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 09:14:29,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 09:14:29,824 INFO L87 Difference]: Start difference. First operand 3545 states and 4965 transitions. Second operand 6 states. [2018-11-07 09:15:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:15:28,266 INFO L93 Difference]: Finished difference Result 7424 states and 10344 transitions. [2018-11-07 09:15:28,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 09:15:28,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 263 [2018-11-07 09:15:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:15:28,285 INFO L225 Difference]: With dead ends: 7424 [2018-11-07 09:15:28,285 INFO L226 Difference]: Without dead ends: 3885 [2018-11-07 09:15:28,298 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 263 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 09:15:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2018-11-07 09:15:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3883. [2018-11-07 09:15:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3883 states. [2018-11-07 09:15:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 5311 transitions. [2018-11-07 09:15:28,396 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 5311 transitions. Word has length 263 [2018-11-07 09:15:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:15:28,397 INFO L480 AbstractCegarLoop]: Abstraction has 3883 states and 5311 transitions. [2018-11-07 09:15:28,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 09:15:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 5311 transitions. [2018-11-07 09:15:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-11-07 09:15:28,405 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:15:28,406 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 09:15:28,406 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:15:28,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:15:28,407 INFO L82 PathProgramCache]: Analyzing trace with hash 478513722, now seen corresponding path program 1 times [2018-11-07 09:15:28,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:15:28,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:15:28,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:15:28,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:15:28,409 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:15:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:15:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 240 proven. 115 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-07 09:15:28,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:15:28,866 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:15:28,867 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 356 with the following transitions: [2018-11-07 09:15:28,867 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [583], [585], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 09:15:28,873 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:15:28,874 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:15:29,105 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 09:15:29,106 INFO L272 AbstractInterpreter]: Visited 139 different actions 404 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 09:15:29,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:15:29,115 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 09:15:29,517 INFO L227 lantSequenceWeakener]: Weakened 352 states. On average, predicates are now at 80.64% of their original sizes. [2018-11-07 09:15:29,517 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 09:15:29,812 INFO L415 sIntCurrentIteration]: We unified 354 AI predicates to 354 [2018-11-07 09:15:29,813 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 09:15:29,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:15:29,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 09:15:29,813 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:15:29,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 09:15:29,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 09:15:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 09:15:29,815 INFO L87 Difference]: Start difference. First operand 3883 states and 5311 transitions. Second operand 10 states. [2018-11-07 09:17:33,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:17:33,776 INFO L93 Difference]: Finished difference Result 9062 states and 12453 transitions. [2018-11-07 09:17:33,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-07 09:17:33,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 355 [2018-11-07 09:17:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:17:33,803 INFO L225 Difference]: With dead ends: 9062 [2018-11-07 09:17:33,804 INFO L226 Difference]: Without dead ends: 5523 [2018-11-07 09:17:33,821 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 364 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2018-11-07 09:17:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2018-11-07 09:17:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5486. [2018-11-07 09:17:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5486 states. [2018-11-07 09:17:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 7100 transitions. [2018-11-07 09:17:33,969 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 7100 transitions. Word has length 355 [2018-11-07 09:17:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:17:33,969 INFO L480 AbstractCegarLoop]: Abstraction has 5486 states and 7100 transitions. [2018-11-07 09:17:33,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 09:17:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 7100 transitions. [2018-11-07 09:17:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2018-11-07 09:17:33,989 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:17:33,990 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 09:17:33,990 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:17:33,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:17:33,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1919421790, now seen corresponding path program 1 times [2018-11-07 09:17:33,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:17:33,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:17:33,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:17:33,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:17:33,992 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:17:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:17:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 252 proven. 54 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-11-07 09:17:34,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:17:34,609 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:17:34,610 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 504 with the following transitions: [2018-11-07 09:17:34,611 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [583], [585], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 09:17:34,627 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:17:34,628 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:17:35,290 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 09:17:35,291 INFO L272 AbstractInterpreter]: Visited 250 different actions 745 times. Merged at 8 different actions 19 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 09:17:35,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:17:35,323 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 09:17:35,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:17:35,324 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 09:17:35,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:17:35,342 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 09:17:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:17:35,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 09:17:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-11-07 09:17:35,907 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 09:17:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-11-07 09:17:36,437 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:17:36,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-11-07 09:17:36,438 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:17:36,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 09:17:36,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 09:17:36,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 09:17:36,440 INFO L87 Difference]: Start difference. First operand 5486 states and 7100 transitions. Second operand 3 states. [2018-11-07 09:17:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 09:17:40,364 INFO L93 Difference]: Finished difference Result 10628 states and 13855 transitions. [2018-11-07 09:17:40,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 09:17:40,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 503 [2018-11-07 09:17:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 09:17:40,399 INFO L225 Difference]: With dead ends: 10628 [2018-11-07 09:17:40,399 INFO L226 Difference]: Without dead ends: 5486 [2018-11-07 09:17:40,436 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 1007 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 09:17:40,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2018-11-07 09:17:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5486. [2018-11-07 09:17:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5486 states. [2018-11-07 09:17:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 6798 transitions. [2018-11-07 09:17:40,585 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 6798 transitions. Word has length 503 [2018-11-07 09:17:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 09:17:40,586 INFO L480 AbstractCegarLoop]: Abstraction has 5486 states and 6798 transitions. [2018-11-07 09:17:40,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 09:17:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 6798 transitions. [2018-11-07 09:17:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2018-11-07 09:17:40,605 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 09:17:40,605 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 09:17:40,606 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 09:17:40,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:17:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1803842259, now seen corresponding path program 1 times [2018-11-07 09:17:40,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 09:17:40,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:17:40,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 09:17:40,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 09:17:40,608 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 09:17:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 09:17:41,376 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 09:17:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 77 proven. 254 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 09:17:42,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 09:17:42,194 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 09:17:42,194 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 528 with the following transitions: [2018-11-07 09:17:42,195 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [583], [585], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1288], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 09:17:42,200 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 09:17:42,200 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 09:17:42,810 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 09:17:42,810 INFO L272 AbstractInterpreter]: Visited 248 different actions 743 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 09:17:42,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 09:17:42,850 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 09:17:43,435 INFO L227 lantSequenceWeakener]: Weakened 524 states. On average, predicates are now at 80.43% of their original sizes. [2018-11-07 09:17:43,435 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 09:17:43,991 INFO L415 sIntCurrentIteration]: We unified 526 AI predicates to 526 [2018-11-07 09:17:43,991 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 09:17:43,991 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 09:17:43,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2018-11-07 09:17:43,992 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 09:17:43,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 09:17:43,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 09:17:43,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-07 09:17:43,993 INFO L87 Difference]: Start difference. First operand 5486 states and 6798 transitions. Second operand 9 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown