java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label57_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:23:54,885 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:23:54,888 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:23:54,900 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:23:54,901 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:23:54,902 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:23:54,903 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:23:54,905 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:23:54,906 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:23:54,907 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:23:54,908 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:23:54,908 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:23:54,909 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:23:54,910 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:23:54,912 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:23:54,912 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:23:54,913 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:23:54,915 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:23:54,917 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:23:54,922 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:23:54,923 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:23:54,924 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:23:54,928 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:23:54,929 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:23:54,929 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:23:54,930 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:23:54,931 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:23:54,934 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:23:54,935 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:23:54,936 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:23:54,936 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:23:54,937 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:23:54,937 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:23:54,937 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:23:54,940 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:23:54,942 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:23:54,942 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:23:54,968 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:23:54,968 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:23:54,969 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:23:54,969 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:23:54,970 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:23:54,970 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:23:54,970 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:23:54,970 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:23:54,970 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:23:54,971 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:23:54,971 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:23:54,971 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:23:54,971 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:23:54,972 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:23:54,973 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:23:54,973 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:23:54,973 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:23:54,973 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:23:54,974 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:23:54,974 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:23:54,974 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:23:54,974 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:23:54,974 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:23:54,975 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:23:54,976 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:23:54,976 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:23:54,977 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:23:54,977 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:23:54,977 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:23:54,977 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:23:54,977 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:23:54,977 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:23:54,978 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:23:54,978 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:23:54,978 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:23:55,032 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:23:55,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:23:55,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:23:55,049 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:23:55,049 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:23:55,050 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label57_false-unreach-call.c [2018-11-07 18:23:55,116 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b82c279/7aa188e525be4e6da2c503d496b136e6/FLAG3cabba5cd [2018-11-07 18:23:55,875 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:23:55,876 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label57_false-unreach-call.c [2018-11-07 18:23:55,901 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b82c279/7aa188e525be4e6da2c503d496b136e6/FLAG3cabba5cd [2018-11-07 18:23:55,917 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b82c279/7aa188e525be4e6da2c503d496b136e6 [2018-11-07 18:23:55,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:23:55,932 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:23:55,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:23:55,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:23:55,941 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:23:55,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:23:55" (1/1) ... [2018-11-07 18:23:55,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7293a3c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:55, skipping insertion in model container [2018-11-07 18:23:55,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:23:55" (1/1) ... [2018-11-07 18:23:55,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:23:56,098 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:23:57,143 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:23:57,148 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:23:57,555 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:23:57,580 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:23:57,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57 WrapperNode [2018-11-07 18:23:57,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:23:57,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:23:57,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:23:57,582 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:23:57,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... [2018-11-07 18:23:57,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... [2018-11-07 18:23:57,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:23:57,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:23:57,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:23:57,834 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:23:57,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... [2018-11-07 18:23:57,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... [2018-11-07 18:23:57,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... [2018-11-07 18:23:57,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... [2018-11-07 18:23:57,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... [2018-11-07 18:23:57,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... [2018-11-07 18:23:58,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... [2018-11-07 18:23:58,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:23:58,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:23:58,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:23:58,033 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:23:58,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:23:58,110 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:23:58,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:23:58,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:23:58,111 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:23:58,111 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:23:58,111 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:23:58,111 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:23:58,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:23:58,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:23:58,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:23:58,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:24:07,307 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:24:07,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:24:07 BoogieIcfgContainer [2018-11-07 18:24:07,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:24:07,309 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:24:07,309 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:24:07,313 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:24:07,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:23:55" (1/3) ... [2018-11-07 18:24:07,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262e0c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:24:07, skipping insertion in model container [2018-11-07 18:24:07,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:23:57" (2/3) ... [2018-11-07 18:24:07,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262e0c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:24:07, skipping insertion in model container [2018-11-07 18:24:07,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:24:07" (3/3) ... [2018-11-07 18:24:07,317 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label57_false-unreach-call.c [2018-11-07 18:24:07,327 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:24:07,337 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:24:07,355 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:24:07,402 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:24:07,402 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:24:07,402 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:24:07,402 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:24:07,403 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:24:07,403 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:24:07,403 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:24:07,403 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:24:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 18:24:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-07 18:24:07,454 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:24:07,456 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] [2018-11-07 18:24:07,459 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:24:07,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash -43851924, now seen corresponding path program 1 times [2018-11-07 18:24:07,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:24:07,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:07,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:07,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:07,517 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:24:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:24:07,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:24:07,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:24:07,918 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:24:07,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:24:07,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:24:07,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:24:07,942 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 18:24:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:24:21,057 INFO L93 Difference]: Finished difference Result 2166 states and 4013 transitions. [2018-11-07 18:24:21,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:24:21,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2018-11-07 18:24:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:24:21,108 INFO L225 Difference]: With dead ends: 2166 [2018-11-07 18:24:21,109 INFO L226 Difference]: Without dead ends: 1556 [2018-11-07 18:24:21,125 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 [2018-11-07 18:24:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2018-11-07 18:24:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1068. [2018-11-07 18:24:21,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-11-07 18:24:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1850 transitions. [2018-11-07 18:24:21,263 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1850 transitions. Word has length 24 [2018-11-07 18:24:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:24:21,264 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 1850 transitions. [2018-11-07 18:24:21,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:24:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1850 transitions. [2018-11-07 18:24:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-11-07 18:24:21,271 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:24:21,271 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:24:21,271 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:24:21,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:21,272 INFO L82 PathProgramCache]: Analyzing trace with hash -397529710, now seen corresponding path program 1 times [2018-11-07 18:24:21,272 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:24:21,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:21,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:21,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:21,276 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:24:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:24:21,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:24:21,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:24:21,662 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:24:21,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:24:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:24:21,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:24:21,665 INFO L87 Difference]: Start difference. First operand 1068 states and 1850 transitions. Second operand 6 states. [2018-11-07 18:24:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:24:29,042 INFO L93 Difference]: Finished difference Result 3059 states and 5419 transitions. [2018-11-07 18:24:29,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:24:29,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-11-07 18:24:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:24:29,066 INFO L225 Difference]: With dead ends: 3059 [2018-11-07 18:24:29,066 INFO L226 Difference]: Without dead ends: 1997 [2018-11-07 18:24:29,071 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:24:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-11-07 18:24:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1975. [2018-11-07 18:24:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2018-11-07 18:24:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3181 transitions. [2018-11-07 18:24:29,159 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3181 transitions. Word has length 100 [2018-11-07 18:24:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:24:29,160 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 3181 transitions. [2018-11-07 18:24:29,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:24:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3181 transitions. [2018-11-07 18:24:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-07 18:24:29,171 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:24:29,171 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:24:29,172 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:24:29,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:29,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1715903094, now seen corresponding path program 1 times [2018-11-07 18:24:29,172 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:24:29,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:29,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:29,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:29,174 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:24:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:24:29,488 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:24:29,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:24:29,488 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:24:29,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:24:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:24:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:24:29,489 INFO L87 Difference]: Start difference. First operand 1975 states and 3181 transitions. Second operand 6 states. [2018-11-07 18:24:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:24:33,585 INFO L93 Difference]: Finished difference Result 4880 states and 7834 transitions. [2018-11-07 18:24:33,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:24:33,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2018-11-07 18:24:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:24:33,605 INFO L225 Difference]: With dead ends: 4880 [2018-11-07 18:24:33,605 INFO L226 Difference]: Without dead ends: 2911 [2018-11-07 18:24:33,614 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:24:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-11-07 18:24:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2880. [2018-11-07 18:24:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-11-07 18:24:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2018-11-07 18:24:33,702 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 104 [2018-11-07 18:24:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:24:33,703 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2018-11-07 18:24:33,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:24:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2018-11-07 18:24:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-11-07 18:24:33,705 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:24:33,706 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 18:24:33,706 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:24:33,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:33,706 INFO L82 PathProgramCache]: Analyzing trace with hash 405307367, now seen corresponding path program 1 times [2018-11-07 18:24:33,707 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:24:33,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:33,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:33,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:33,708 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:24:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:24:33,930 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:24:33,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:24:33,930 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:24:33,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:24:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:24:33,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:24:33,932 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 transitions. Second operand 4 states. [2018-11-07 18:24:40,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:24:40,746 INFO L93 Difference]: Finished difference Result 6193 states and 8530 transitions. [2018-11-07 18:24:40,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:24:40,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2018-11-07 18:24:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:24:40,773 INFO L225 Difference]: With dead ends: 6193 [2018-11-07 18:24:40,774 INFO L226 Difference]: Without dead ends: 3319 [2018-11-07 18:24:40,785 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:24:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2018-11-07 18:24:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3319. [2018-11-07 18:24:40,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3319 states. [2018-11-07 18:24:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4368 transitions. [2018-11-07 18:24:40,881 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4368 transitions. Word has length 134 [2018-11-07 18:24:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:24:40,886 INFO L480 AbstractCegarLoop]: Abstraction has 3319 states and 4368 transitions. [2018-11-07 18:24:40,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:24:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4368 transitions. [2018-11-07 18:24:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-07 18:24:40,892 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:24:40,892 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:24:40,893 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:24:40,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:40,893 INFO L82 PathProgramCache]: Analyzing trace with hash 400329504, now seen corresponding path program 1 times [2018-11-07 18:24:40,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:24:40,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:40,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:40,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:24:40,895 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:24:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 18:24:41,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:24:41,611 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:24:41,612 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 189 with the following transitions: [2018-11-07 18:24:41,614 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [802], [804], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:24:41,659 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:24:41,660 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:24:42,204 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:24:43,271 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:24:43,273 INFO L272 AbstractInterpreter]: Visited 97 different actions 377 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 18:24:43,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:24:43,319 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:24:43,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:24:43,320 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:24:43,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:24:43,335 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:24:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:24:43,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:24:43,937 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-07 18:24:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 18:24:44,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:24:44,904 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 18:24:45,020 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 18:24:45,305 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-11-07 18:24:46,153 WARN L179 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-11-07 18:24:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 39 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:24:46,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:24:46,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-11-07 18:24:46,764 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:24:46,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:24:46,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:24:46,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-11-07 18:24:46,766 INFO L87 Difference]: Start difference. First operand 3319 states and 4368 transitions. Second operand 10 states. [2018-11-07 18:25:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:25:09,581 INFO L93 Difference]: Finished difference Result 15900 states and 21743 transitions. [2018-11-07 18:25:09,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:25:09,582 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 188 [2018-11-07 18:25:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:25:09,657 INFO L225 Difference]: With dead ends: 15900 [2018-11-07 18:25:09,657 INFO L226 Difference]: Without dead ends: 12587 [2018-11-07 18:25:09,678 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 369 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2018-11-07 18:25:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12587 states. [2018-11-07 18:25:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12587 to 12455. [2018-11-07 18:25:09,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12455 states. [2018-11-07 18:25:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12455 states to 12455 states and 15586 transitions. [2018-11-07 18:25:10,024 INFO L78 Accepts]: Start accepts. Automaton has 12455 states and 15586 transitions. Word has length 188 [2018-11-07 18:25:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:25:10,024 INFO L480 AbstractCegarLoop]: Abstraction has 12455 states and 15586 transitions. [2018-11-07 18:25:10,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:25:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 12455 states and 15586 transitions. [2018-11-07 18:25:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-11-07 18:25:10,032 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:25:10,032 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:25:10,033 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:25:10,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:25:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash -841312883, now seen corresponding path program 1 times [2018-11-07 18:25:10,034 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:25:10,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:10,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:25:10,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:10,036 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:25:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:25:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 35 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-07 18:25:10,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:25:10,506 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:25:10,506 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2018-11-07 18:25:10,506 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [802], [804], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:25:10,518 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:25:10,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:25:10,688 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:25:10,700 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:25:10,700 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 18:25:10,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:25:10,735 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:25:11,132 INFO L227 lantSequenceWeakener]: Weakened 201 states. On average, predicates are now at 75.04% of their original sizes. [2018-11-07 18:25:11,133 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:25:11,621 INFO L415 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2018-11-07 18:25:11,621 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:25:11,622 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:25:11,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2018-11-07 18:25:11,622 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:25:11,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:25:11,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:25:11,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:25:11,624 INFO L87 Difference]: Start difference. First operand 12455 states and 15586 transitions. Second operand 8 states. [2018-11-07 18:25:44,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:25:44,150 INFO L93 Difference]: Finished difference Result 25340 states and 31667 transitions. [2018-11-07 18:25:44,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 18:25:44,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 210 [2018-11-07 18:25:44,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:25:44,195 INFO L225 Difference]: With dead ends: 25340 [2018-11-07 18:25:44,195 INFO L226 Difference]: Without dead ends: 12891 [2018-11-07 18:25:44,228 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 211 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:25:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12891 states. [2018-11-07 18:25:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12891 to 12889. [2018-11-07 18:25:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12889 states. [2018-11-07 18:25:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12889 states to 12889 states and 16034 transitions. [2018-11-07 18:25:44,515 INFO L78 Accepts]: Start accepts. Automaton has 12889 states and 16034 transitions. Word has length 210 [2018-11-07 18:25:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:25:44,516 INFO L480 AbstractCegarLoop]: Abstraction has 12889 states and 16034 transitions. [2018-11-07 18:25:44,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:25:44,516 INFO L276 IsEmpty]: Start isEmpty. Operand 12889 states and 16034 transitions. [2018-11-07 18:25:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-11-07 18:25:44,523 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:25:44,523 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:25:44,524 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:25:44,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:25:44,524 INFO L82 PathProgramCache]: Analyzing trace with hash 483840771, now seen corresponding path program 1 times [2018-11-07 18:25:44,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:25:44,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:44,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:25:44,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:44,525 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:25:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:25:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2018-11-07 18:25:44,895 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:25:44,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:25:44,895 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:25:44,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:25:44,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:25:44,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:25:44,896 INFO L87 Difference]: Start difference. First operand 12889 states and 16034 transitions. Second operand 3 states. [2018-11-07 18:25:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:25:52,672 INFO L93 Difference]: Finished difference Result 35489 states and 45667 transitions. [2018-11-07 18:25:52,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:25:52,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 285 [2018-11-07 18:25:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:25:52,751 INFO L225 Difference]: With dead ends: 35489 [2018-11-07 18:25:52,751 INFO L226 Difference]: Without dead ends: 23040 [2018-11-07 18:25:52,790 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:25:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23040 states. [2018-11-07 18:25:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23040 to 23034. [2018-11-07 18:25:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23034 states. [2018-11-07 18:25:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23034 states to 23034 states and 28357 transitions. [2018-11-07 18:25:53,322 INFO L78 Accepts]: Start accepts. Automaton has 23034 states and 28357 transitions. Word has length 285 [2018-11-07 18:25:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:25:53,323 INFO L480 AbstractCegarLoop]: Abstraction has 23034 states and 28357 transitions. [2018-11-07 18:25:53,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:25:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 23034 states and 28357 transitions. [2018-11-07 18:25:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-11-07 18:25:53,332 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:25:53,333 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:25:53,333 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:25:53,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:25:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash 831903117, now seen corresponding path program 1 times [2018-11-07 18:25:53,334 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:25:53,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:53,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:25:53,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:25:53,335 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:25:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:25:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-11-07 18:25:53,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:25:53,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:25:53,797 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:25:53,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:25:53,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:25:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:25:53,798 INFO L87 Difference]: Start difference. First operand 23034 states and 28357 transitions. Second operand 4 states. [2018-11-07 18:26:01,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:26:01,976 INFO L93 Difference]: Finished difference Result 61037 states and 77790 transitions. [2018-11-07 18:26:01,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:26:01,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 286 [2018-11-07 18:26:01,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:26:02,110 INFO L225 Difference]: With dead ends: 61037 [2018-11-07 18:26:02,110 INFO L226 Difference]: Without dead ends: 38443 [2018-11-07 18:26:02,177 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:26:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38443 states. [2018-11-07 18:26:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38443 to 36139. [2018-11-07 18:26:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36139 states. [2018-11-07 18:26:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36139 states to 36139 states and 42765 transitions. [2018-11-07 18:26:02,988 INFO L78 Accepts]: Start accepts. Automaton has 36139 states and 42765 transitions. Word has length 286 [2018-11-07 18:26:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:26:02,989 INFO L480 AbstractCegarLoop]: Abstraction has 36139 states and 42765 transitions. [2018-11-07 18:26:02,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:26:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 36139 states and 42765 transitions. [2018-11-07 18:26:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2018-11-07 18:26:03,025 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:26:03,026 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:26:03,026 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:26:03,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:26:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash -533441334, now seen corresponding path program 1 times [2018-11-07 18:26:03,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:26:03,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:26:03,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:26:03,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:26:03,028 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:26:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:26:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-11-07 18:26:04,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:26:04,472 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:26:04,472 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 440 with the following transitions: [2018-11-07 18:26:04,473 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [802], [804], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1243], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1600], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:26:04,479 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:26:04,479 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:26:04,526 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:26:05,138 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:26:05,138 INFO L272 AbstractInterpreter]: Visited 161 different actions 469 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 18:26:05,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:26:05,178 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:26:05,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:26:05,178 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:26:05,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:26:05,197 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:26:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:26:05,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:26:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-11-07 18:26:05,701 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:26:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-11-07 18:26:06,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:26:06,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-07 18:26:06,275 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:26:06,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:26:06,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:26:06,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:26:06,276 INFO L87 Difference]: Start difference. First operand 36139 states and 42765 transitions. Second operand 6 states. [2018-11-07 18:26:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:26:18,293 INFO L93 Difference]: Finished difference Result 93713 states and 110568 transitions. [2018-11-07 18:26:18,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:26:18,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 439 [2018-11-07 18:26:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:26:18,427 INFO L225 Difference]: With dead ends: 93713 [2018-11-07 18:26:18,427 INFO L226 Difference]: Without dead ends: 52295 [2018-11-07 18:26:18,512 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 893 GetRequests, 880 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-11-07 18:26:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52295 states. [2018-11-07 18:26:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52295 to 33160. [2018-11-07 18:26:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33160 states. [2018-11-07 18:26:19,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33160 states to 33160 states and 39515 transitions. [2018-11-07 18:26:19,258 INFO L78 Accepts]: Start accepts. Automaton has 33160 states and 39515 transitions. Word has length 439 [2018-11-07 18:26:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:26:19,259 INFO L480 AbstractCegarLoop]: Abstraction has 33160 states and 39515 transitions. [2018-11-07 18:26:19,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:26:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 33160 states and 39515 transitions. [2018-11-07 18:26:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-11-07 18:26:19,297 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:26:19,297 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:26:19,297 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:26:19,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:26:19,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1492451345, now seen corresponding path program 1 times [2018-11-07 18:26:19,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:26:19,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:26:19,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:26:19,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:26:19,299 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:26:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:26:19,829 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-11-07 18:26:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 96 proven. 388 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-07 18:26:20,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:26:20,490 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:26:20,491 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 465 with the following transitions: [2018-11-07 18:26:20,491 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [802], [804], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1243], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1723], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:26:20,497 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:26:20,497 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:26:20,533 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:26:21,223 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:26:21,223 INFO L272 AbstractInterpreter]: Visited 184 different actions 538 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 18:26:21,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:26:21,225 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:26:21,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:26:21,225 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:26:21,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:26:21,234 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:26:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:26:21,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:26:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-11-07 18:26:22,061 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:26:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 307 proven. 2 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-11-07 18:26:22,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:26:22,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 17 [2018-11-07 18:26:22,641 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:26:22,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 18:26:22,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 18:26:22,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:26:22,642 INFO L87 Difference]: Start difference. First operand 33160 states and 39515 transitions. Second operand 16 states. [2018-11-07 18:26:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:26:52,883 INFO L93 Difference]: Finished difference Result 122134 states and 149173 transitions. [2018-11-07 18:26:52,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-11-07 18:26:52,884 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 464 [2018-11-07 18:26:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:26:53,033 INFO L225 Difference]: With dead ends: 122134 [2018-11-07 18:26:53,033 INFO L226 Difference]: Without dead ends: 50924 [2018-11-07 18:26:53,313 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1127 GetRequests, 995 SyntacticMatches, 8 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6233 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2439, Invalid=13311, Unknown=0, NotChecked=0, Total=15750 [2018-11-07 18:26:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50924 states. [2018-11-07 18:26:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50924 to 39298. [2018-11-07 18:26:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39298 states. [2018-11-07 18:26:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39298 states to 39298 states and 45348 transitions. [2018-11-07 18:26:54,035 INFO L78 Accepts]: Start accepts. Automaton has 39298 states and 45348 transitions. Word has length 464 [2018-11-07 18:26:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:26:54,036 INFO L480 AbstractCegarLoop]: Abstraction has 39298 states and 45348 transitions. [2018-11-07 18:26:54,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 18:26:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 39298 states and 45348 transitions. [2018-11-07 18:26:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2018-11-07 18:26:54,062 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:26:54,063 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:26:54,063 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:26:54,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:26:54,063 INFO L82 PathProgramCache]: Analyzing trace with hash -796740242, now seen corresponding path program 1 times [2018-11-07 18:26:54,063 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:26:54,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:26:54,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:26:54,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:26:54,065 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:26:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:26:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 336 proven. 15 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-11-07 18:26:54,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:26:54,980 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:26:54,980 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 513 with the following transitions: [2018-11-07 18:26:54,981 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [802], [804], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1893], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:26:54,986 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:26:54,986 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:26:55,034 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:26:57,198 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:26:57,199 INFO L272 AbstractInterpreter]: Visited 222 different actions 1339 times. Merged at 9 different actions 64 times. Widened at 1 different actions 2 times. Found 15 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 18:26:57,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:26:57,208 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:26:57,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:26:57,208 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:26:57,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:26:57,217 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:26:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:26:57,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:26:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 336 proven. 15 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-11-07 18:26:57,592 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:26:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-11-07 18:26:58,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:26:58,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2018-11-07 18:26:58,157 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:26:58,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 18:26:58,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 18:26:58,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:26:58,159 INFO L87 Difference]: Start difference. First operand 39298 states and 45348 transitions. Second operand 8 states. [2018-11-07 18:27:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:27:09,185 INFO L93 Difference]: Finished difference Result 107548 states and 125683 transitions. [2018-11-07 18:27:09,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:27:09,189 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 512 [2018-11-07 18:27:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:27:09,351 INFO L225 Difference]: With dead ends: 107548 [2018-11-07 18:27:09,351 INFO L226 Difference]: Without dead ends: 70434 [2018-11-07 18:27:09,414 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1043 GetRequests, 1027 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-11-07 18:27:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70434 states. [2018-11-07 18:27:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70434 to 65723. [2018-11-07 18:27:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65723 states. [2018-11-07 18:27:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65723 states to 65723 states and 76604 transitions. [2018-11-07 18:27:10,547 INFO L78 Accepts]: Start accepts. Automaton has 65723 states and 76604 transitions. Word has length 512 [2018-11-07 18:27:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:27:10,549 INFO L480 AbstractCegarLoop]: Abstraction has 65723 states and 76604 transitions. [2018-11-07 18:27:10,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 18:27:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 65723 states and 76604 transitions. [2018-11-07 18:27:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2018-11-07 18:27:10,574 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:27:10,575 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 3, 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] [2018-11-07 18:27:10,575 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:27:10,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:27:10,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1303845556, now seen corresponding path program 1 times [2018-11-07 18:27:10,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:27:10,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:27:10,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:27:10,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:27:10,577 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:27:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:27:11,330 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 18:27:11,526 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 18:27:11,752 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2018-11-07 18:27:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 76 proven. 192 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2018-11-07 18:27:12,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:27:12,087 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:27:12,087 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 514 with the following transitions: [2018-11-07 18:27:12,088 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [802], [804], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1356], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1893], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 18:27:12,092 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:27:12,093 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:27:12,181 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:27:14,293 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:27:14,294 INFO L272 AbstractInterpreter]: Visited 222 different actions 1341 times. Merged at 9 different actions 66 times. Widened at 1 different actions 2 times. Found 15 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 18:27:14,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:27:14,331 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:27:14,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:27:14,331 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:27:14,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:27:14,343 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:27:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:27:14,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:27:15,032 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 31 [2018-11-07 18:27:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-11-07 18:27:15,607 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:27:15,785 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 18:27:15,973 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 18:27:16,115 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-11-07 18:27:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-11-07 18:27:16,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:27:16,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 15 [2018-11-07 18:27:16,606 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:27:16,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 18:27:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 18:27:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:27:16,608 INFO L87 Difference]: Start difference. First operand 65723 states and 76604 transitions. Second operand 13 states. [2018-11-07 18:27:16,960 WARN L179 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 10 [2018-11-07 18:27:19,394 WARN L179 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2018-11-07 18:27:19,988 WARN L179 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2018-11-07 18:27:20,558 WARN L179 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 Received shutdown request... [2018-11-07 18:27:31,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-07 18:27:31,655 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:27:31,660 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:27:31,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:27:31 BoogieIcfgContainer [2018-11-07 18:27:31,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:27:31,662 INFO L168 Benchmark]: Toolchain (without parser) took 215730.99 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -842.6 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-11-07 18:27:31,663 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:27:31,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1648.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:27:31,664 INFO L168 Benchmark]: Boogie Procedure Inliner took 251.30 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 797.4 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -980.8 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2018-11-07 18:27:31,665 INFO L168 Benchmark]: Boogie Preprocessor took 198.83 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2018-11-07 18:27:31,666 INFO L168 Benchmark]: RCFGBuilder took 9275.45 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 461.8 MB). Peak memory consumption was 461.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:27:31,667 INFO L168 Benchmark]: TraceAbstraction took 204351.56 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 2.3 GB in the end (delta: -464.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-11-07 18:27:31,672 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1648.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 251.30 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 797.4 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -980.8 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 198.83 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9275.45 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 461.8 MB). Peak memory consumption was 461.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204351.56 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.6 GB). Free memory was 1.8 GB in the beginning and 2.3 GB in the end (delta: -464.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 59). Cancelled while BasicCegarLoop was constructing difference of abstraction (65723states) and FLOYD_HOARE automaton (currently 16 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (583 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 204.2s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 172.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4567 SDtfs, 35168 SDslu, 4417 SDs, 0 SdLazy, 55409 SolverSat, 12293 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 120.1s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 4765 GetRequests, 4521 SyntacticMatches, 18 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6490 ImplicationChecksByTransitivity, 15.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65723occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.8s AbstIntTime, 6 AbstIntIterations, 1 AbstIntStrong, 0.9975375241913624 AbsIntWeakeningRatio, 0.1291866028708134 AbsIntAvgWeakeningVarsNumRemoved, 19.033492822966508 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.9s AutomataMinimizationTime, 11 MinimizatonAttempts, 38457 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 14.7s InterpolantComputationTime, 5375 NumberOfCodeBlocks, 5375 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 7469 ConstructedInterpolants, 100 QuantifiedInterpolants, 12726418 SizeOfPredicates, 12 NumberOfNonLiveVariables, 3397 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 22 InterpolantComputations, 6 PerfectInterpolantSequences, 7247/8021 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown