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/Problem10_label58_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:11:36,915 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:11:36,917 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:11:36,934 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:11:36,934 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:11:36,936 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:11:36,937 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:11:36,942 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:11:36,948 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:11:36,955 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:11:36,956 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:11:36,956 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:11:36,957 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:11:36,958 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:11:36,962 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:11:36,963 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:11:36,965 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:11:36,966 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:11:36,971 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:11:36,972 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:11:36,976 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:11:36,977 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:11:36,980 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:11:36,981 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:11:36,981 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:11:36,982 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:11:36,984 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:11:36,984 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:11:36,986 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:11:36,987 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:11:36,989 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:11:36,990 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:11:36,990 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:11:36,991 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:11:36,992 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:11:36,992 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:11:36,992 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 16:11:37,018 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:11:37,018 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:11:37,019 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:11:37,019 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:11:37,020 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:11:37,020 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:11:37,020 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:11:37,020 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:11:37,020 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:11:37,021 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:11:37,021 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:11:37,021 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:11:37,021 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:11:37,022 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:11:37,022 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:11:37,022 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:11:37,022 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:11:37,023 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:11:37,023 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:11:37,023 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:11:37,023 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:11:37,023 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:11:37,023 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:11:37,024 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:11:37,024 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:11:37,024 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:11:37,024 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:11:37,024 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:11:37,025 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:11:37,026 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:11:37,026 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:11:37,026 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:11:37,026 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:11:37,026 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:11:37,026 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:11:37,091 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:11:37,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:11:37,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:11:37,113 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:11:37,113 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:11:37,114 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label58_false-unreach-call.c [2018-11-12 16:11:37,177 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233309cc6/a04cca62d65c47d6bf9e6bccacd37aba/FLAG8f617ca28 [2018-11-12 16:11:37,825 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:11:37,827 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label58_false-unreach-call.c [2018-11-12 16:11:37,848 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233309cc6/a04cca62d65c47d6bf9e6bccacd37aba/FLAG8f617ca28 [2018-11-12 16:11:37,866 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/233309cc6/a04cca62d65c47d6bf9e6bccacd37aba [2018-11-12 16:11:37,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:11:37,879 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:11:37,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:11:37,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:11:37,884 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:11:37,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:11:37" (1/1) ... [2018-11-12 16:11:37,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a274fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:37, skipping insertion in model container [2018-11-12 16:11:37,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:11:37" (1/1) ... [2018-11-12 16:11:37,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:11:37,970 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:11:38,432 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:11:38,437 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:11:38,564 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:11:38,586 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:11:38,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38 WrapperNode [2018-11-12 16:11:38,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:11:38,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:11:38,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:11:38,589 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:11:38,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (1/1) ... [2018-11-12 16:11:38,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (1/1) ... [2018-11-12 16:11:38,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:11:38,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:11:38,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:11:38,719 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:11:38,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (1/1) ... [2018-11-12 16:11:38,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (1/1) ... [2018-11-12 16:11:38,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (1/1) ... [2018-11-12 16:11:38,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (1/1) ... [2018-11-12 16:11:38,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (1/1) ... [2018-11-12 16:11:38,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (1/1) ... [2018-11-12 16:11:38,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (1/1) ... [2018-11-12 16:11:38,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:11:38,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:11:38,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:11:38,843 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:11:38,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (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 16:11:38,922 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:11:38,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:11:38,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:11:38,924 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:11:38,925 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:11:38,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:11:38,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:11:38,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:11:38,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:11:42,094 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:11:42,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:11:42 BoogieIcfgContainer [2018-11-12 16:11:42,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:11:42,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:11:42,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:11:42,100 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:11:42,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:11:37" (1/3) ... [2018-11-12 16:11:42,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ccb5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:11:42, skipping insertion in model container [2018-11-12 16:11:42,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:11:38" (2/3) ... [2018-11-12 16:11:42,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ccb5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:11:42, skipping insertion in model container [2018-11-12 16:11:42,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:11:42" (3/3) ... [2018-11-12 16:11:42,104 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label58_false-unreach-call.c [2018-11-12 16:11:42,113 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:11:42,122 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:11:42,139 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:11:42,175 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:11:42,176 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:11:42,176 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:11:42,176 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:11:42,176 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:11:42,176 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:11:42,176 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:11:42,177 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:11:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-11-12 16:11:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-12 16:11:42,212 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:11:42,213 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] [2018-11-12 16:11:42,215 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:11:42,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:11:42,222 INFO L82 PathProgramCache]: Analyzing trace with hash -527630724, now seen corresponding path program 1 times [2018-11-12 16:11:42,225 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:11:42,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:42,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:11:42,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:42,278 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:11:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:11:42,631 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-12 16:11:42,637 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 16:11:42,639 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:11:42,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:11:42,640 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:11:42,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:11:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:11:42,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:11:42,666 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 4 states. [2018-11-12 16:11:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:11:45,455 INFO L93 Difference]: Finished difference Result 737 states and 1298 transitions. [2018-11-12 16:11:45,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:11:45,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-11-12 16:11:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:11:45,478 INFO L225 Difference]: With dead ends: 737 [2018-11-12 16:11:45,478 INFO L226 Difference]: Without dead ends: 515 [2018-11-12 16:11:45,486 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:11:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-11-12 16:11:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2018-11-12 16:11:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-11-12 16:11:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 848 transitions. [2018-11-12 16:11:45,577 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 848 transitions. Word has length 20 [2018-11-12 16:11:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:11:45,577 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 848 transitions. [2018-11-12 16:11:45,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:11:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 848 transitions. [2018-11-12 16:11:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-11-12 16:11:45,584 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:11:45,584 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:11:45,584 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:11:45,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:11:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1079251133, now seen corresponding path program 1 times [2018-11-12 16:11:45,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:11:45,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:45,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:11:45,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:45,587 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:11:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:11:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:11:45,955 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:11:45,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:11:45,955 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:11:45,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:11:45,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:11:45,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:11:45,959 INFO L87 Difference]: Start difference. First operand 515 states and 848 transitions. Second operand 6 states. [2018-11-12 16:11:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:11:48,910 INFO L93 Difference]: Finished difference Result 1863 states and 3251 transitions. [2018-11-12 16:11:48,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:11:48,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2018-11-12 16:11:48,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:11:48,932 INFO L225 Difference]: With dead ends: 1863 [2018-11-12 16:11:48,933 INFO L226 Difference]: Without dead ends: 1354 [2018-11-12 16:11:48,941 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:11:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2018-11-12 16:11:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1331. [2018-11-12 16:11:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-11-12 16:11:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2051 transitions. [2018-11-12 16:11:49,046 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2051 transitions. Word has length 95 [2018-11-12 16:11:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:11:49,047 INFO L480 AbstractCegarLoop]: Abstraction has 1331 states and 2051 transitions. [2018-11-12 16:11:49,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:11:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2051 transitions. [2018-11-12 16:11:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-12 16:11:49,051 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:11:49,052 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:11:49,052 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:11:49,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:11:49,053 INFO L82 PathProgramCache]: Analyzing trace with hash 861016671, now seen corresponding path program 1 times [2018-11-12 16:11:49,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:11:49,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:49,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:11:49,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:49,054 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:11:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:11:49,307 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:11:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:11:49,361 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:11:49,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:11:49,362 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:11:49,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:11:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:11:49,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:11:49,363 INFO L87 Difference]: Start difference. First operand 1331 states and 2051 transitions. Second operand 6 states. [2018-11-12 16:11:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:11:53,398 INFO L93 Difference]: Finished difference Result 3512 states and 5693 transitions. [2018-11-12 16:11:53,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:11:53,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2018-11-12 16:11:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:11:53,419 INFO L225 Difference]: With dead ends: 3512 [2018-11-12 16:11:53,420 INFO L226 Difference]: Without dead ends: 2187 [2018-11-12 16:11:53,431 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:11:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2018-11-12 16:11:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2165. [2018-11-12 16:11:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2165 states. [2018-11-12 16:11:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 3178 transitions. [2018-11-12 16:11:53,528 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 3178 transitions. Word has length 97 [2018-11-12 16:11:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:11:53,529 INFO L480 AbstractCegarLoop]: Abstraction has 2165 states and 3178 transitions. [2018-11-12 16:11:53,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:11:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 3178 transitions. [2018-11-12 16:11:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-11-12 16:11:53,531 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:11:53,531 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:11:53,532 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:11:53,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:11:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash 300203728, now seen corresponding path program 1 times [2018-11-12 16:11:53,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:11:53,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:53,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:11:53,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:53,533 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:11:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:11:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:11:53,733 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:11:53,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:11:53,734 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:11:53,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:11:53,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:11:53,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:11:53,735 INFO L87 Difference]: Start difference. First operand 2165 states and 3178 transitions. Second operand 4 states. [2018-11-12 16:11:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:11:54,872 INFO L93 Difference]: Finished difference Result 4762 states and 7142 transitions. [2018-11-12 16:11:54,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:11:54,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2018-11-12 16:11:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:11:54,890 INFO L225 Difference]: With dead ends: 4762 [2018-11-12 16:11:54,891 INFO L226 Difference]: Without dead ends: 2603 [2018-11-12 16:11:54,906 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 16:11:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2018-11-12 16:11:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2601. [2018-11-12 16:11:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2601 states. [2018-11-12 16:11:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3587 transitions. [2018-11-12 16:11:54,995 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3587 transitions. Word has length 100 [2018-11-12 16:11:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:11:54,996 INFO L480 AbstractCegarLoop]: Abstraction has 2601 states and 3587 transitions. [2018-11-12 16:11:54,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:11:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3587 transitions. [2018-11-12 16:11:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-12 16:11:55,000 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:11:55,000 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:11:55,000 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:11:55,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:11:55,004 INFO L82 PathProgramCache]: Analyzing trace with hash 789375408, now seen corresponding path program 1 times [2018-11-12 16:11:55,004 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:11:55,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:55,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:11:55,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:55,005 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:11:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:11:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:11:55,252 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:11:55,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:11:55,252 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:11:55,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:11:55,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:11:55,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:11:55,253 INFO L87 Difference]: Start difference. First operand 2601 states and 3587 transitions. Second operand 6 states. [2018-11-12 16:11:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:11:57,500 INFO L93 Difference]: Finished difference Result 6030 states and 8674 transitions. [2018-11-12 16:11:57,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:11:57,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2018-11-12 16:11:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:11:57,523 INFO L225 Difference]: With dead ends: 6030 [2018-11-12 16:11:57,524 INFO L226 Difference]: Without dead ends: 3435 [2018-11-12 16:11:57,535 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:11:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2018-11-12 16:11:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3363. [2018-11-12 16:11:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3363 states. [2018-11-12 16:11:57,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4459 transitions. [2018-11-12 16:11:57,644 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4459 transitions. Word has length 116 [2018-11-12 16:11:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:11:57,644 INFO L480 AbstractCegarLoop]: Abstraction has 3363 states and 4459 transitions. [2018-11-12 16:11:57,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:11:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4459 transitions. [2018-11-12 16:11:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-12 16:11:57,651 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:11:57,652 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:11:57,652 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:11:57,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:11:57,652 INFO L82 PathProgramCache]: Analyzing trace with hash 44889932, now seen corresponding path program 1 times [2018-11-12 16:11:57,655 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:11:57,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:57,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:11:57,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:11:57,656 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:11:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:11:57,982 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:11:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-12 16:11:58,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:11:58,121 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:11:58,123 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 191 with the following transitions: [2018-11-12 16:11:58,125 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [559], [563], [567], [570], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-12 16:11:58,170 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:11:58,170 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:11:58,716 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:11:58,765 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:11:58,767 INFO L272 AbstractInterpreter]: Visited 94 different actions 94 times. Never merged. Never widened. Performed 854 root evaluator evaluations with a maximum evaluation depth of 6. Performed 854 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 16:11:58,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:11:58,821 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:11:59,527 INFO L227 lantSequenceWeakener]: Weakened 181 states. On average, predicates are now at 72.66% of their original sizes. [2018-11-12 16:11:59,529 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:11:59,901 INFO L415 sIntCurrentIteration]: We unified 189 AI predicates to 189 [2018-11-12 16:11:59,902 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:11:59,903 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:11:59,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2018-11-12 16:11:59,903 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:11:59,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:11:59,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:11:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:11:59,905 INFO L87 Difference]: Start difference. First operand 3363 states and 4459 transitions. Second operand 7 states. [2018-11-12 16:12:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:12:08,098 INFO L93 Difference]: Finished difference Result 6866 states and 9110 transitions. [2018-11-12 16:12:08,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:12:08,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 190 [2018-11-12 16:12:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:12:08,116 INFO L225 Difference]: With dead ends: 6866 [2018-11-12 16:12:08,117 INFO L226 Difference]: Without dead ends: 3509 [2018-11-12 16:12:08,131 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:12:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2018-11-12 16:12:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 3507. [2018-11-12 16:12:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3507 states. [2018-11-12 16:12:08,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 4612 transitions. [2018-11-12 16:12:08,237 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 4612 transitions. Word has length 190 [2018-11-12 16:12:08,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:12:08,238 INFO L480 AbstractCegarLoop]: Abstraction has 3507 states and 4612 transitions. [2018-11-12 16:12:08,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:12:08,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 4612 transitions. [2018-11-12 16:12:08,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-11-12 16:12:08,246 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:12:08,247 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:12:08,247 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:12:08,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:08,248 INFO L82 PathProgramCache]: Analyzing trace with hash -239609168, now seen corresponding path program 1 times [2018-11-12 16:12:08,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:12:08,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:08,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:12:08,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:08,249 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:12:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:12:08,551 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 16:12:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-12 16:12:08,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:12:08,845 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:12:08,845 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2018-11-12 16:12:08,846 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [702], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-12 16:12:08,852 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:12:08,852 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:12:08,976 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:12:10,438 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:12:10,439 INFO L272 AbstractInterpreter]: Visited 131 different actions 766 times. Merged at 7 different actions 38 times. Widened at 1 different actions 1 times. Performed 9449 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9449 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:12:10,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:10,476 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:12:10,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:12:10,476 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 16:12:10,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:12:10,489 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:12:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:12:10,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:12:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:12:11,144 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:12:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:12:11,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:12:11,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2018-11-12 16:12:11,562 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:12:11,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 16:12:11,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 16:12:11,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-12 16:12:11,563 INFO L87 Difference]: Start difference. First operand 3507 states and 4612 transitions. Second operand 11 states. [2018-11-12 16:12:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:12:17,853 INFO L93 Difference]: Finished difference Result 10277 states and 14081 transitions. [2018-11-12 16:12:17,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-12 16:12:17,854 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 222 [2018-11-12 16:12:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:12:17,868 INFO L225 Difference]: With dead ends: 10277 [2018-11-12 16:12:17,868 INFO L226 Difference]: Without dead ends: 3089 [2018-11-12 16:12:17,918 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 448 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2018-11-12 16:12:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2018-11-12 16:12:17,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2359. [2018-11-12 16:12:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2359 states. [2018-11-12 16:12:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 2715 transitions. [2018-11-12 16:12:17,986 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 2715 transitions. Word has length 222 [2018-11-12 16:12:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:12:17,986 INFO L480 AbstractCegarLoop]: Abstraction has 2359 states and 2715 transitions. [2018-11-12 16:12:17,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 16:12:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 2715 transitions. [2018-11-12 16:12:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-11-12 16:12:17,993 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:12:17,994 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:12:17,994 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:12:17,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:17,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1512727360, now seen corresponding path program 1 times [2018-11-12 16:12:17,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:12:17,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:17,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:12:17,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:12:17,996 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:12:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:12:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2018-11-12 16:12:19,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:12:19,132 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:12:19,133 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 279 with the following transitions: [2018-11-12 16:12:19,133 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [782], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-11-12 16:12:19,138 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:12:19,138 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:12:19,320 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:12:19,800 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:12:19,801 INFO L272 AbstractInterpreter]: Visited 151 different actions 445 times. Merged at 7 different actions 16 times. Never widened. Performed 6292 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6292 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:12:19,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:12:19,839 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:12:19,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:12:19,839 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 16:12:19,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:12:19,853 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:12:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:12:19,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:12:20,920 WARN L179 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 20 [2018-11-12 16:12:21,267 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-12 16:12:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 5 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:12:21,627 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:12:22,559 WARN L179 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2018-11-12 16:12:23,038 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-12 16:12:23,795 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 1670