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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:27:39,880 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:27:39,882 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:27:39,899 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:27:39,899 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:27:39,901 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:27:39,903 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:27:39,905 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:27:39,907 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:27:39,908 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:27:39,909 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:27:39,909 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:27:39,910 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:27:39,911 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:27:39,912 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:27:39,913 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:27:39,914 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:27:39,916 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:27:39,918 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:27:39,919 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:27:39,920 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:27:39,921 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:27:39,924 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:27:39,924 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:27:39,924 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:27:39,925 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:27:39,926 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:27:39,927 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:27:39,927 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:27:39,928 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:27:39,929 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:27:39,929 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:27:39,929 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:27:39,930 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:27:39,931 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:27:39,931 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:27:39,932 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.epf [2018-11-07 15:27:39,953 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:27:39,954 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:27:39,954 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:27:39,956 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:27:39,956 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:27:39,956 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:27:39,957 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:27:39,957 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:27:39,957 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:27:39,957 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:27:39,957 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:27:39,958 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:27:39,959 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:27:39,959 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:27:39,959 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:27:39,959 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:27:39,960 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:27:39,961 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:27:39,961 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:27:39,962 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:27:39,962 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:27:39,962 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:27:39,962 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:27:39,962 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:27:39,963 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:27:39,963 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:27:39,963 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:27:39,964 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:27:39,964 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:27:39,964 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:27:39,964 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:27:39,964 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:27:39,965 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:27:39,965 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:27:40,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:27:40,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:27:40,049 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:27:40,051 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:27:40,051 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:27:40,053 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label59_true-unreach-call.c [2018-11-07 15:27:40,122 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97545a15/b6e70160ceb247c0af0f52ed9ede1971/FLAG8efdba25a [2018-11-07 15:27:40,765 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:27:40,766 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label59_true-unreach-call.c [2018-11-07 15:27:40,783 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97545a15/b6e70160ceb247c0af0f52ed9ede1971/FLAG8efdba25a [2018-11-07 15:27:40,799 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c97545a15/b6e70160ceb247c0af0f52ed9ede1971 [2018-11-07 15:27:40,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:27:40,813 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:27:40,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:27:40,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:27:40,818 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:27:40,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:27:40" (1/1) ... [2018-11-07 15:27:40,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab4496a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:40, skipping insertion in model container [2018-11-07 15:27:40,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:27:40" (1/1) ... [2018-11-07 15:27:40,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:27:40,943 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:27:41,661 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:27:41,666 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:27:41,970 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:27:41,993 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:27:41,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41 WrapperNode [2018-11-07 15:27:41,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:27:41,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:27:41,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:27:41,996 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:27:42,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (1/1) ... [2018-11-07 15:27:42,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (1/1) ... [2018-11-07 15:27:42,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:27:42,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:27:42,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:27:42,190 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:27:42,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (1/1) ... [2018-11-07 15:27:42,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (1/1) ... [2018-11-07 15:27:42,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (1/1) ... [2018-11-07 15:27:42,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (1/1) ... [2018-11-07 15:27:42,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (1/1) ... [2018-11-07 15:27:42,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (1/1) ... [2018-11-07 15:27:42,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (1/1) ... [2018-11-07 15:27:42,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:27:42,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:27:42,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:27:42,358 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:27:42,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (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 15:27:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:27:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:27:42,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:27:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:27:42,432 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:27:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:27:42,433 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:27:42,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:27:42,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:27:42,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:27:42,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:27:49,150 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:27:49,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:27:49 BoogieIcfgContainer [2018-11-07 15:27:49,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:27:49,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:27:49,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:27:49,156 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:27:49,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:27:40" (1/3) ... [2018-11-07 15:27:49,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a76224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:27:49, skipping insertion in model container [2018-11-07 15:27:49,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:27:41" (2/3) ... [2018-11-07 15:27:49,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a76224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:27:49, skipping insertion in model container [2018-11-07 15:27:49,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:27:49" (3/3) ... [2018-11-07 15:27:49,161 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label59_true-unreach-call.c [2018-11-07 15:27:49,172 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:27:49,183 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:27:49,202 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:27:49,256 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:27:49,256 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:27:49,256 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:27:49,257 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:27:49,257 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:27:49,258 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:27:49,258 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:27:49,258 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:27:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 15:27:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-07 15:27:49,310 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:27:49,311 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] [2018-11-07 15:27:49,314 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:27:49,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:27:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 371317715, now seen corresponding path program 1 times [2018-11-07 15:27:49,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:27:49,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:27:49,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:27:49,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:27:49,372 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:27:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:27:49,831 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-11-07 15:27:49,847 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 15:27:49,850 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:27:49,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:27:49,850 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:27:49,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:27:49,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:27:49,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:27:49,876 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 4 states. [2018-11-07 15:27:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:27:54,747 INFO L93 Difference]: Finished difference Result 1513 states and 2838 transitions. [2018-11-07 15:27:54,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:27:54,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2018-11-07 15:27:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:27:54,788 INFO L225 Difference]: With dead ends: 1513 [2018-11-07 15:27:54,789 INFO L226 Difference]: Without dead ends: 1097 [2018-11-07 15:27:54,803 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:27:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2018-11-07 15:27:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 744. [2018-11-07 15:27:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 15:27:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1357 transitions. [2018-11-07 15:27:54,919 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1357 transitions. Word has length 51 [2018-11-07 15:27:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:27:54,920 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1357 transitions. [2018-11-07 15:27:54,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:27:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1357 transitions. [2018-11-07 15:27:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-07 15:27:54,928 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:27:54,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:27:54,929 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:27:54,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:27:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1405398300, now seen corresponding path program 1 times [2018-11-07 15:27:54,929 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:27:54,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:27:54,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:27:54,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:27:54,931 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:27:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:27:55,293 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:27:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:27:55,359 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:27:55,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:27:55,359 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:27:55,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:27:55,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:27:55,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:27:55,362 INFO L87 Difference]: Start difference. First operand 744 states and 1357 transitions. Second operand 5 states. [2018-11-07 15:27:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:27:59,799 INFO L93 Difference]: Finished difference Result 2196 states and 4092 transitions. [2018-11-07 15:27:59,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:27:59,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2018-11-07 15:27:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:27:59,831 INFO L225 Difference]: With dead ends: 2196 [2018-11-07 15:27:59,831 INFO L226 Difference]: Without dead ends: 1458 [2018-11-07 15:27:59,836 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:27:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2018-11-07 15:27:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1438. [2018-11-07 15:27:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1438 states. [2018-11-07 15:27:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2551 transitions. [2018-11-07 15:27:59,927 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2551 transitions. Word has length 121 [2018-11-07 15:27:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:27:59,928 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 2551 transitions. [2018-11-07 15:27:59,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:27:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2551 transitions. [2018-11-07 15:27:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-11-07 15:27:59,931 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:27:59,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:27:59,932 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:27:59,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:27:59,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1847072879, now seen corresponding path program 1 times [2018-11-07 15:27:59,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:27:59,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:27:59,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:27:59,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:27:59,937 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:27:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:28:00,236 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:28:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:28:00,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:28:00,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:28:00,514 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:28:00,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:28:00,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:28:00,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:28:00,515 INFO L87 Difference]: Start difference. First operand 1438 states and 2551 transitions. Second operand 6 states. [2018-11-07 15:28:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:28:05,385 INFO L93 Difference]: Finished difference Result 4237 states and 7540 transitions. [2018-11-07 15:28:05,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:28:05,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2018-11-07 15:28:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:28:05,405 INFO L225 Difference]: With dead ends: 4237 [2018-11-07 15:28:05,406 INFO L226 Difference]: Without dead ends: 2805 [2018-11-07 15:28:05,416 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:28:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2018-11-07 15:28:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2785. [2018-11-07 15:28:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2018-11-07 15:28:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4352 transitions. [2018-11-07 15:28:05,502 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4352 transitions. Word has length 124 [2018-11-07 15:28:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:28:05,503 INFO L480 AbstractCegarLoop]: Abstraction has 2785 states and 4352 transitions. [2018-11-07 15:28:05,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:28:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4352 transitions. [2018-11-07 15:28:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-07 15:28:05,507 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:28:05,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:28:05,509 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:28:05,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:28:05,509 INFO L82 PathProgramCache]: Analyzing trace with hash -674317012, now seen corresponding path program 1 times [2018-11-07 15:28:05,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:28:05,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:05,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:28:05,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:05,511 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:28:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:28:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:28:05,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:28:05,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:28:05,717 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:28:05,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:28:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:28:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:28:05,719 INFO L87 Difference]: Start difference. First operand 2785 states and 4352 transitions. Second operand 6 states. [2018-11-07 15:28:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:28:09,584 INFO L93 Difference]: Finished difference Result 6952 states and 11048 transitions. [2018-11-07 15:28:09,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:28:09,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-11-07 15:28:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:28:09,607 INFO L225 Difference]: With dead ends: 6952 [2018-11-07 15:28:09,607 INFO L226 Difference]: Without dead ends: 4173 [2018-11-07 15:28:09,624 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 [2018-11-07 15:28:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2018-11-07 15:28:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 4153. [2018-11-07 15:28:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4153 states. [2018-11-07 15:28:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 5896 transitions. [2018-11-07 15:28:09,749 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 5896 transitions. Word has length 125 [2018-11-07 15:28:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:28:09,749 INFO L480 AbstractCegarLoop]: Abstraction has 4153 states and 5896 transitions. [2018-11-07 15:28:09,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:28:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 5896 transitions. [2018-11-07 15:28:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-11-07 15:28:09,752 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:28:09,752 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:28:09,752 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:28:09,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:28:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash -710224295, now seen corresponding path program 1 times [2018-11-07 15:28:09,753 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:28:09,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:09,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:28:09,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:09,755 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:28:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:28:10,023 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:28:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:28:10,411 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:28:10,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:28:10,411 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:28:10,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:28:10,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:28:10,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:28:10,412 INFO L87 Difference]: Start difference. First operand 4153 states and 5896 transitions. Second operand 6 states. [2018-11-07 15:28:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:28:14,929 INFO L93 Difference]: Finished difference Result 11374 states and 16767 transitions. [2018-11-07 15:28:14,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:28:14,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2018-11-07 15:28:14,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:28:14,965 INFO L225 Difference]: With dead ends: 11374 [2018-11-07 15:28:14,965 INFO L226 Difference]: Without dead ends: 7227 [2018-11-07 15:28:14,994 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:28:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2018-11-07 15:28:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 7152. [2018-11-07 15:28:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7152 states. [2018-11-07 15:28:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 9826 transitions. [2018-11-07 15:28:15,173 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 9826 transitions. Word has length 128 [2018-11-07 15:28:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:28:15,174 INFO L480 AbstractCegarLoop]: Abstraction has 7152 states and 9826 transitions. [2018-11-07 15:28:15,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:28:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 9826 transitions. [2018-11-07 15:28:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-07 15:28:15,176 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:28:15,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:28:15,177 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:28:15,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:28:15,177 INFO L82 PathProgramCache]: Analyzing trace with hash -727624727, now seen corresponding path program 1 times [2018-11-07 15:28:15,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:28:15,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:15,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:28:15,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:15,179 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:28:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:28:15,397 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:28:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:28:15,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:28:15,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:28:15,782 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:28:15,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:28:15,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:28:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:28:15,784 INFO L87 Difference]: Start difference. First operand 7152 states and 9826 transitions. Second operand 6 states. [2018-11-07 15:28:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:28:19,047 INFO L93 Difference]: Finished difference Result 17771 states and 25546 transitions. [2018-11-07 15:28:19,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:28:19,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2018-11-07 15:28:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:28:19,103 INFO L225 Difference]: With dead ends: 17771 [2018-11-07 15:28:19,104 INFO L226 Difference]: Without dead ends: 10625 [2018-11-07 15:28:19,137 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:28:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10625 states. [2018-11-07 15:28:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10625 to 10585. [2018-11-07 15:28:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10585 states. [2018-11-07 15:28:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 13819 transitions. [2018-11-07 15:28:19,505 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 13819 transitions. Word has length 136 [2018-11-07 15:28:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:28:19,505 INFO L480 AbstractCegarLoop]: Abstraction has 10585 states and 13819 transitions. [2018-11-07 15:28:19,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:28:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 13819 transitions. [2018-11-07 15:28:19,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-07 15:28:19,515 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:28:19,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:28:19,515 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:28:19,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:28:19,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2054227824, now seen corresponding path program 1 times [2018-11-07 15:28:19,528 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:28:19,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:19,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:28:19,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:19,529 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:28:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:28:19,777 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 15:28:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:28:19,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:28:19,839 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:28:19,840 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 144 with the following transitions: [2018-11-07 15:28:19,842 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], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [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], [760], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 15:28:19,890 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:28:19,891 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:28:20,628 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 15:28:21,309 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 15:28:21,311 INFO L272 AbstractInterpreter]: Visited 100 different actions 286 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 15:28:21,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:28:21,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 15:28:21,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:28:21,360 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 15:28:21,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:28:21,374 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 15:28:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:28:21,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 15:28:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:28:21,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 15:28:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:28:21,867 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:28:21,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-11-07 15:28:21,868 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:28:21,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 15:28:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 15:28:21,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:28:21,869 INFO L87 Difference]: Start difference. First operand 10585 states and 13819 transitions. Second operand 3 states. [2018-11-07 15:28:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:28:25,372 INFO L93 Difference]: Finished difference Result 21164 states and 27640 transitions. [2018-11-07 15:28:25,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 15:28:25,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2018-11-07 15:28:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:28:25,427 INFO L225 Difference]: With dead ends: 21164 [2018-11-07 15:28:25,428 INFO L226 Difference]: Without dead ends: 7903 [2018-11-07 15:28:25,528 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:28:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2018-11-07 15:28:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7903. [2018-11-07 15:28:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7903 states. [2018-11-07 15:28:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7903 states to 7903 states and 8996 transitions. [2018-11-07 15:28:25,718 INFO L78 Accepts]: Start accepts. Automaton has 7903 states and 8996 transitions. Word has length 143 [2018-11-07 15:28:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:28:25,719 INFO L480 AbstractCegarLoop]: Abstraction has 7903 states and 8996 transitions. [2018-11-07 15:28:25,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 15:28:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 7903 states and 8996 transitions. [2018-11-07 15:28:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-11-07 15:28:25,723 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:28:25,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:28:25,724 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:28:25,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:28:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1721939931, now seen corresponding path program 1 times [2018-11-07 15:28:25,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:28:25,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:25,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:28:25,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:25,726 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:28:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:28:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:28:25,963 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:28:25,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:28:25,963 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:28:25,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:28:25,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:28:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:28:25,965 INFO L87 Difference]: Start difference. First operand 7903 states and 8996 transitions. Second operand 4 states. [2018-11-07 15:28:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:28:28,139 INFO L93 Difference]: Finished difference Result 23776 states and 27470 transitions. [2018-11-07 15:28:28,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:28:28,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 214 [2018-11-07 15:28:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:28:28,204 INFO L225 Difference]: With dead ends: 23776 [2018-11-07 15:28:28,205 INFO L226 Difference]: Without dead ends: 15879 [2018-11-07 15:28:28,240 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:28:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15879 states. [2018-11-07 15:28:28,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15879 to 15877. [2018-11-07 15:28:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15877 states. [2018-11-07 15:28:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15877 states to 15877 states and 17767 transitions. [2018-11-07 15:28:28,741 INFO L78 Accepts]: Start accepts. Automaton has 15877 states and 17767 transitions. Word has length 214 [2018-11-07 15:28:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:28:28,742 INFO L480 AbstractCegarLoop]: Abstraction has 15877 states and 17767 transitions. [2018-11-07 15:28:28,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:28:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 15877 states and 17767 transitions. [2018-11-07 15:28:28,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2018-11-07 15:28:28,804 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:28:28,805 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:28:28,805 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:28:28,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:28:28,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1257154816, now seen corresponding path program 1 times [2018-11-07 15:28:28,806 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:28:28,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:28,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:28:28,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:28:28,808 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:28:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:28:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 300 proven. 223 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-07 15:28:29,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:28:29,794 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:28:29,795 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 675 with the following transitions: [2018-11-07 15:28:29,796 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], [487], [489], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [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], [836], [837], [841], [845], [849], [853], [856], [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], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1445], [1449], [1453], [1456], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 15:28:29,812 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:28:29,813 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:28:30,573 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:28:30,574 INFO L272 AbstractInterpreter]: Visited 273 different actions 273 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:28:30,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:28:30,613 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:28:32,621 INFO L227 lantSequenceWeakener]: Weakened 640 states. On average, predicates are now at 77.54% of their original sizes. [2018-11-07 15:28:32,621 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:28:36,294 INFO L415 sIntCurrentIteration]: We unified 673 AI predicates to 673 [2018-11-07 15:28:36,294 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:28:36,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:28:36,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-11-07 15:28:36,296 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:28:36,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 15:28:36,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 15:28:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-11-07 15:28:36,298 INFO L87 Difference]: Start difference. First operand 15877 states and 17767 transitions. Second operand 13 states. [2018-11-07 15:28:43,006 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown