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/Problem11_label31_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 17:44:31,215 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 17:44:31,217 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 17:44:31,234 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 17:44:31,235 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 17:44:31,236 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 17:44:31,238 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 17:44:31,240 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 17:44:31,243 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 17:44:31,244 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 17:44:31,246 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 17:44:31,246 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 17:44:31,247 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 17:44:31,249 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 17:44:31,255 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 17:44:31,256 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 17:44:31,261 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 17:44:31,263 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 17:44:31,265 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 17:44:31,266 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 17:44:31,267 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 17:44:31,269 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 17:44:31,271 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 17:44:31,271 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 17:44:31,271 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 17:44:31,272 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 17:44:31,273 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 17:44:31,274 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 17:44:31,274 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 17:44:31,275 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 17:44:31,276 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 17:44:31,276 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 17:44:31,277 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 17:44:31,277 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 17:44:31,278 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 17:44:31,278 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 17:44:31,279 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 17:44:31,303 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 17:44:31,303 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 17:44:31,304 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 17:44:31,304 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 17:44:31,304 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 17:44:31,304 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 17:44:31,307 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 17:44:31,307 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 17:44:31,307 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 17:44:31,307 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 17:44:31,308 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 17:44:31,308 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 17:44:31,308 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 17:44:31,309 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 17:44:31,309 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 17:44:31,309 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 17:44:31,309 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 17:44:31,310 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 17:44:31,311 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 17:44:31,311 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 17:44:31,311 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 17:44:31,311 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 17:44:31,311 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 17:44:31,312 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 17:44:31,312 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 17:44:31,312 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 17:44:31,312 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 17:44:31,312 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 17:44:31,313 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 17:44:31,313 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 17:44:31,313 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 17:44:31,313 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 17:44:31,313 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 17:44:31,313 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 17:44:31,314 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 17:44:31,358 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 17:44:31,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 17:44:31,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 17:44:31,379 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 17:44:31,379 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 17:44:31,380 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label31_false-unreach-call.c [2018-11-07 17:44:31,444 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4901adb/ef8725e15f0a4815a6ad130256b3d11e/FLAG6e219dfbd [2018-11-07 17:44:32,086 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 17:44:32,090 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label31_false-unreach-call.c [2018-11-07 17:44:32,116 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4901adb/ef8725e15f0a4815a6ad130256b3d11e/FLAG6e219dfbd [2018-11-07 17:44:32,131 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d4901adb/ef8725e15f0a4815a6ad130256b3d11e [2018-11-07 17:44:32,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 17:44:32,144 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 17:44:32,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 17:44:32,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 17:44:32,149 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 17:44:32,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:44:32" (1/1) ... [2018-11-07 17:44:32,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fca1d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:32, skipping insertion in model container [2018-11-07 17:44:32,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:44:32" (1/1) ... [2018-11-07 17:44:32,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 17:44:32,247 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 17:44:32,857 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 17:44:32,862 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 17:44:33,118 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 17:44:33,160 INFO L193 MainTranslator]: Completed translation [2018-11-07 17:44:33,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33 WrapperNode [2018-11-07 17:44:33,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 17:44:33,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 17:44:33,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 17:44:33,163 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 17:44:33,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (1/1) ... [2018-11-07 17:44:33,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (1/1) ... [2018-11-07 17:44:33,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 17:44:33,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 17:44:33,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 17:44:33,358 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 17:44:33,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (1/1) ... [2018-11-07 17:44:33,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (1/1) ... [2018-11-07 17:44:33,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (1/1) ... [2018-11-07 17:44:33,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (1/1) ... [2018-11-07 17:44:33,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (1/1) ... [2018-11-07 17:44:33,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (1/1) ... [2018-11-07 17:44:33,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (1/1) ... [2018-11-07 17:44:33,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 17:44:33,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 17:44:33,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 17:44:33,513 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 17:44:33,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (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 17:44:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 17:44:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 17:44:33,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 17:44:33,602 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 17:44:33,602 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 17:44:33,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 17:44:33,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 17:44:33,603 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 17:44:33,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 17:44:38,749 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 17:44:38,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:44:38 BoogieIcfgContainer [2018-11-07 17:44:38,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 17:44:38,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 17:44:38,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 17:44:38,754 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 17:44:38,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:44:32" (1/3) ... [2018-11-07 17:44:38,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233dcccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:44:38, skipping insertion in model container [2018-11-07 17:44:38,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:44:33" (2/3) ... [2018-11-07 17:44:38,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233dcccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:44:38, skipping insertion in model container [2018-11-07 17:44:38,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:44:38" (3/3) ... [2018-11-07 17:44:38,759 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label31_false-unreach-call.c [2018-11-07 17:44:38,770 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 17:44:38,780 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 17:44:38,799 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 17:44:38,841 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 17:44:38,841 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 17:44:38,842 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 17:44:38,842 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 17:44:38,842 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 17:44:38,842 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 17:44:38,842 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 17:44:38,843 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 17:44:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 17:44:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-07 17:44:38,881 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:44:38,882 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:44:38,885 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:44:38,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:44:38,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1380418692, now seen corresponding path program 1 times [2018-11-07 17:44:38,895 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:44:38,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:44:38,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:44:38,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:44:38,958 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:44:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:44:39,313 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 17:44:39,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:44:39,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 17:44:39,316 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:44:39,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 17:44:39,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 17:44:39,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:44:39,340 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-11-07 17:44:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:44:42,069 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-11-07 17:44:42,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 17:44:42,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-11-07 17:44:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:44:42,092 INFO L225 Difference]: With dead ends: 782 [2018-11-07 17:44:42,092 INFO L226 Difference]: Without dead ends: 487 [2018-11-07 17:44:42,100 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 17:44:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-11-07 17:44:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-11-07 17:44:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-11-07 17:44:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-11-07 17:44:42,197 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 14 [2018-11-07 17:44:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:44:42,197 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-11-07 17:44:42,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 17:44:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-11-07 17:44:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-07 17:44:42,203 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:44:42,203 INFO L375 BasicCegarLoop]: trace histogram [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 17:44:42,204 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:44:42,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:44:42,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1196080591, now seen corresponding path program 1 times [2018-11-07 17:44:42,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:44:42,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:44:42,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:44:42,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:44:42,206 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:44:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:44:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:44:42,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:44:42,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 17:44:42,980 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:44:42,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 17:44:42,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 17:44:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 17:44:42,983 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-11-07 17:44:43,264 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 17:44:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:44:49,439 INFO L93 Difference]: Finished difference Result 1755 states and 3230 transitions. [2018-11-07 17:44:49,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 17:44:49,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2018-11-07 17:44:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:44:49,460 INFO L225 Difference]: With dead ends: 1755 [2018-11-07 17:44:49,461 INFO L226 Difference]: Without dead ends: 1279 [2018-11-07 17:44:49,467 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-07 17:44:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2018-11-07 17:44:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1033. [2018-11-07 17:44:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2018-11-07 17:44:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1679 transitions. [2018-11-07 17:44:49,583 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1679 transitions. Word has length 89 [2018-11-07 17:44:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:44:49,584 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 1679 transitions. [2018-11-07 17:44:49,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 17:44:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1679 transitions. [2018-11-07 17:44:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-07 17:44:49,596 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:44:49,597 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:44:49,597 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:44:49,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:44:49,602 INFO L82 PathProgramCache]: Analyzing trace with hash -669093568, now seen corresponding path program 1 times [2018-11-07 17:44:49,602 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:44:49,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:44:49,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:44:49,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:44:49,604 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:44:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:44:49,907 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 17:44:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 17:44:49,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:44:49,972 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:44:49,973 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 163 with the following transitions: [2018-11-07 17:44:49,976 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [514], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:44:50,034 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:44:50,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:44:50,578 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:44:50,583 INFO L272 AbstractInterpreter]: Visited 80 different actions 80 times. Never merged. Never widened. Never found a fixpoint. Largest state had 28 variables. [2018-11-07 17:44:50,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:44:50,620 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:44:51,116 INFO L227 lantSequenceWeakener]: Weakened 153 states. On average, predicates are now at 72.78% of their original sizes. [2018-11-07 17:44:51,116 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:44:51,476 INFO L415 sIntCurrentIteration]: We unified 161 AI predicates to 161 [2018-11-07 17:44:51,476 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:44:51,477 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:44:51,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 17:44:51,477 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:44:51,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 17:44:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 17:44:51,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 17:44:51,479 INFO L87 Difference]: Start difference. First operand 1033 states and 1679 transitions. Second operand 7 states. [2018-11-07 17:44:54,576 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:45:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:45:06,676 INFO L93 Difference]: Finished difference Result 2252 states and 3562 transitions. [2018-11-07 17:45:06,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 17:45:06,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 162 [2018-11-07 17:45:06,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:45:06,683 INFO L225 Difference]: With dead ends: 2252 [2018-11-07 17:45:06,684 INFO L226 Difference]: Without dead ends: 1225 [2018-11-07 17:45:06,687 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 17:45:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2018-11-07 17:45:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1223. [2018-11-07 17:45:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1223 states. [2018-11-07 17:45:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 1877 transitions. [2018-11-07 17:45:06,729 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 1877 transitions. Word has length 162 [2018-11-07 17:45:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:45:06,729 INFO L480 AbstractCegarLoop]: Abstraction has 1223 states and 1877 transitions. [2018-11-07 17:45:06,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 17:45:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 1877 transitions. [2018-11-07 17:45:06,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-11-07 17:45:06,733 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:45:06,734 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:45:06,734 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:45:06,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:45:06,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1475705382, now seen corresponding path program 1 times [2018-11-07 17:45:06,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:45:06,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:06,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:45:06,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:06,737 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:45:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:45:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:45:07,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:45:07,611 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:45:07,611 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2018-11-07 17:45:07,612 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:45:07,617 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:45:07,618 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:45:07,747 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:45:07,903 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:45:07,904 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 17:45:07,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:45:07,942 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:45:08,273 INFO L227 lantSequenceWeakener]: Weakened 203 states. On average, predicates are now at 72.91% of their original sizes. [2018-11-07 17:45:08,273 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:45:09,106 INFO L415 sIntCurrentIteration]: We unified 205 AI predicates to 205 [2018-11-07 17:45:09,106 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:45:09,106 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:45:09,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2018-11-07 17:45:09,107 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:45:09,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 17:45:09,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 17:45:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 17:45:09,108 INFO L87 Difference]: Start difference. First operand 1223 states and 1877 transitions. Second operand 11 states. [2018-11-07 17:45:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:45:24,610 INFO L93 Difference]: Finished difference Result 2445 states and 3917 transitions. [2018-11-07 17:45:24,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 17:45:24,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 206 [2018-11-07 17:45:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:45:24,618 INFO L225 Difference]: With dead ends: 2445 [2018-11-07 17:45:24,618 INFO L226 Difference]: Without dead ends: 1418 [2018-11-07 17:45:24,622 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 214 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-07 17:45:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2018-11-07 17:45:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1414. [2018-11-07 17:45:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2018-11-07 17:45:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 2084 transitions. [2018-11-07 17:45:24,657 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 2084 transitions. Word has length 206 [2018-11-07 17:45:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:45:24,658 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 2084 transitions. [2018-11-07 17:45:24,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 17:45:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 2084 transitions. [2018-11-07 17:45:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-11-07 17:45:24,662 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:45:24,662 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:45:24,663 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:45:24,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:45:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1225192974, now seen corresponding path program 1 times [2018-11-07 17:45:24,663 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:45:24,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:24,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:45:24,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:24,665 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:45:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:45:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 17:45:24,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 17:45:24,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 17:45:24,861 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:45:24,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 17:45:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 17:45:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:45:24,863 INFO L87 Difference]: Start difference. First operand 1414 states and 2084 transitions. Second operand 3 states. [2018-11-07 17:45:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:45:26,268 INFO L93 Difference]: Finished difference Result 3193 states and 5147 transitions. [2018-11-07 17:45:26,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 17:45:26,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2018-11-07 17:45:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:45:26,282 INFO L225 Difference]: With dead ends: 3193 [2018-11-07 17:45:26,282 INFO L226 Difference]: Without dead ends: 2166 [2018-11-07 17:45:26,287 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 17:45:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2018-11-07 17:45:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 1987. [2018-11-07 17:45:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1987 states. [2018-11-07 17:45:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2801 transitions. [2018-11-07 17:45:26,335 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2801 transitions. Word has length 216 [2018-11-07 17:45:26,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:45:26,336 INFO L480 AbstractCegarLoop]: Abstraction has 1987 states and 2801 transitions. [2018-11-07 17:45:26,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 17:45:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2801 transitions. [2018-11-07 17:45:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-11-07 17:45:26,339 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:45:26,340 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:45:26,340 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:45:26,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:45:26,341 INFO L82 PathProgramCache]: Analyzing trace with hash -612296166, now seen corresponding path program 1 times [2018-11-07 17:45:26,341 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:45:26,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:26,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:45:26,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:26,342 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:45:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:45:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:45:26,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:45:26,761 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:45:26,761 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 217 with the following transitions: [2018-11-07 17:45:26,761 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:45:26,767 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:45:26,767 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:45:26,925 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:45:27,172 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:45:27,173 INFO L272 AbstractInterpreter]: Visited 135 different actions 392 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 17:45:27,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:45:27,183 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:45:27,485 INFO L227 lantSequenceWeakener]: Weakened 213 states. On average, predicates are now at 72.92% of their original sizes. [2018-11-07 17:45:27,485 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:45:27,598 INFO L415 sIntCurrentIteration]: We unified 215 AI predicates to 215 [2018-11-07 17:45:27,599 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:45:27,599 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:45:27,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2018-11-07 17:45:27,600 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:45:27,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 17:45:27,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 17:45:27,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 17:45:27,601 INFO L87 Difference]: Start difference. First operand 1987 states and 2801 transitions. Second operand 11 states. [2018-11-07 17:45:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:45:37,829 INFO L93 Difference]: Finished difference Result 3978 states and 5940 transitions. [2018-11-07 17:45:37,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 17:45:37,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 216 [2018-11-07 17:45:37,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:45:37,840 INFO L225 Difference]: With dead ends: 3978 [2018-11-07 17:45:37,840 INFO L226 Difference]: Without dead ends: 2378 [2018-11-07 17:45:37,846 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 225 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-07 17:45:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2018-11-07 17:45:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2372. [2018-11-07 17:45:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2372 states. [2018-11-07 17:45:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3243 transitions. [2018-11-07 17:45:37,902 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3243 transitions. Word has length 216 [2018-11-07 17:45:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:45:37,903 INFO L480 AbstractCegarLoop]: Abstraction has 2372 states and 3243 transitions. [2018-11-07 17:45:37,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 17:45:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3243 transitions. [2018-11-07 17:45:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-11-07 17:45:37,907 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:45:37,907 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:45:37,908 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:45:37,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:45:37,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1093129036, now seen corresponding path program 1 times [2018-11-07 17:45:37,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:45:37,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:37,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:45:37,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:37,909 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:45:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:45:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:45:38,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:45:38,868 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:45:38,868 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 222 with the following transitions: [2018-11-07 17:45:38,869 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:45:38,876 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:45:38,876 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:45:38,964 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:45:39,366 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:45:39,366 INFO L272 AbstractInterpreter]: Visited 140 different actions 407 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 17:45:39,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:45:39,374 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:45:39,749 INFO L227 lantSequenceWeakener]: Weakened 218 states. On average, predicates are now at 72.97% of their original sizes. [2018-11-07 17:45:39,749 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:45:40,071 INFO L415 sIntCurrentIteration]: We unified 220 AI predicates to 220 [2018-11-07 17:45:40,072 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:45:40,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:45:40,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 22 [2018-11-07 17:45:40,072 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:45:40,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 17:45:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 17:45:40,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-07 17:45:40,073 INFO L87 Difference]: Start difference. First operand 2372 states and 3243 transitions. Second operand 13 states. [2018-11-07 17:45:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:45:58,766 INFO L93 Difference]: Finished difference Result 4368 states and 6220 transitions. [2018-11-07 17:45:58,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 17:45:58,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 221 [2018-11-07 17:45:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:45:58,776 INFO L225 Difference]: With dead ends: 4368 [2018-11-07 17:45:58,777 INFO L226 Difference]: Without dead ends: 2768 [2018-11-07 17:45:58,782 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 230 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-07 17:45:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2018-11-07 17:45:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2762. [2018-11-07 17:45:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2762 states. [2018-11-07 17:45:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 3656 transitions. [2018-11-07 17:45:58,842 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 3656 transitions. Word has length 221 [2018-11-07 17:45:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:45:58,843 INFO L480 AbstractCegarLoop]: Abstraction has 2762 states and 3656 transitions. [2018-11-07 17:45:58,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 17:45:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 3656 transitions. [2018-11-07 17:45:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-07 17:45:58,847 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:45:58,848 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:45:58,849 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:45:58,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:45:58,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1769082423, now seen corresponding path program 1 times [2018-11-07 17:45:58,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:45:58,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:58,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:45:58,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:45:58,850 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:45:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:45:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:45:59,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:45:59,263 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:45:59,263 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2018-11-07 17:45:59,264 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:45:59,268 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:45:59,269 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:45:59,385 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:45:59,870 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:45:59,870 INFO L272 AbstractInterpreter]: Visited 156 different actions 455 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 17:45:59,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:45:59,878 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:46:00,319 INFO L227 lantSequenceWeakener]: Weakened 23 states. On average, predicates are now at 73.83% of their original sizes. [2018-11-07 17:46:00,319 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:46:00,754 INFO L415 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2018-11-07 17:46:00,754 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:46:00,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:46:00,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [8] total 27 [2018-11-07 17:46:00,755 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:46:00,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 17:46:00,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 17:46:00,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-11-07 17:46:00,757 INFO L87 Difference]: Start difference. First operand 2762 states and 3656 transitions. Second operand 21 states. [2018-11-07 17:46:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:46:28,394 INFO L93 Difference]: Finished difference Result 5542 states and 7855 transitions. [2018-11-07 17:46:28,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 17:46:28,394 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 237 [2018-11-07 17:46:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:46:28,411 INFO L225 Difference]: With dead ends: 5542 [2018-11-07 17:46:28,412 INFO L226 Difference]: Without dead ends: 3556 [2018-11-07 17:46:28,418 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 256 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2018-11-07 17:46:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2018-11-07 17:46:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 3539. [2018-11-07 17:46:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3539 states. [2018-11-07 17:46:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 4527 transitions. [2018-11-07 17:46:28,505 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 4527 transitions. Word has length 237 [2018-11-07 17:46:28,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:46:28,506 INFO L480 AbstractCegarLoop]: Abstraction has 3539 states and 4527 transitions. [2018-11-07 17:46:28,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 17:46:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 4527 transitions. [2018-11-07 17:46:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-11-07 17:46:28,513 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:46:28,514 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:28,514 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:46:28,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:46:28,514 INFO L82 PathProgramCache]: Analyzing trace with hash 860254427, now seen corresponding path program 1 times [2018-11-07 17:46:28,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:46:28,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:46:28,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:46:28,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:46:28,516 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:46:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:46:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2018-11-07 17:46:28,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:46:28,887 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:46:28,887 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 286 with the following transitions: [2018-11-07 17:46:28,887 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [734], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:46:28,891 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:46:28,891 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:46:29,018 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:46:30,300 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:46:30,300 INFO L272 AbstractInterpreter]: Visited 156 different actions 615 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 17:46:30,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:46:30,309 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:46:30,742 INFO L227 lantSequenceWeakener]: Weakened 71 states. On average, predicates are now at 73.29% of their original sizes. [2018-11-07 17:46:30,742 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:46:31,057 INFO L415 sIntCurrentIteration]: We unified 284 AI predicates to 284 [2018-11-07 17:46:31,057 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:46:31,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:46:31,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [4] total 22 [2018-11-07 17:46:31,058 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:46:31,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 17:46:31,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 17:46:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2018-11-07 17:46:31,059 INFO L87 Difference]: Start difference. First operand 3539 states and 4527 transitions. Second operand 20 states. [2018-11-07 17:46:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:46:53,347 INFO L93 Difference]: Finished difference Result 6320 states and 9117 transitions. [2018-11-07 17:46:53,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-07 17:46:53,348 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 285 [2018-11-07 17:46:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:46:53,364 INFO L225 Difference]: With dead ends: 6320 [2018-11-07 17:46:53,364 INFO L226 Difference]: Without dead ends: 4720 [2018-11-07 17:46:53,370 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 296 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2018-11-07 17:46:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2018-11-07 17:46:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 3931. [2018-11-07 17:46:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3931 states. [2018-11-07 17:46:53,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 5005 transitions. [2018-11-07 17:46:53,460 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 5005 transitions. Word has length 285 [2018-11-07 17:46:53,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:46:53,461 INFO L480 AbstractCegarLoop]: Abstraction has 3931 states and 5005 transitions. [2018-11-07 17:46:53,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 17:46:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 5005 transitions. [2018-11-07 17:46:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-11-07 17:46:53,468 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:46:53,468 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 17:46:53,469 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:46:53,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:46:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash 847353761, now seen corresponding path program 1 times [2018-11-07 17:46:53,469 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:46:53,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:46:53,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:46:53,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:46:53,470 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:46:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:46:54,052 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-07 17:46:54,768 WARN L179 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-11-07 17:46:55,107 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 17:46:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 184 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:46:55,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:46:55,696 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:46:55,696 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 292 with the following transitions: [2018-11-07 17:46:55,696 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:46:55,699 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:46:55,699 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:46:55,843 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:46:56,382 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 17:46:56,382 INFO L272 AbstractInterpreter]: Visited 127 different actions 626 times. Merged at 8 different actions 37 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 17:46:56,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:46:56,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 17:46:56,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:46:56,392 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 17:46:56,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:46:56,409 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 17:46:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:46:56,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 17:46:57,233 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 17:46:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 17:46:57,299 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 17:46:57,749 WARN L179 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-07 17:46:58,487 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-07 17:46:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 17:46:58,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 17:46:58,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-07 17:46:58,852 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 17:46:58,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 17:46:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 17:46:58,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2018-11-07 17:46:58,853 INFO L87 Difference]: Start difference. First operand 3931 states and 5005 transitions. Second operand 18 states. [2018-11-07 17:46:59,171 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2018-11-07 17:47:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:47:12,950 INFO L93 Difference]: Finished difference Result 8862 states and 12524 transitions. [2018-11-07 17:47:12,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-07 17:47:12,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 291 [2018-11-07 17:47:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:47:12,983 INFO L225 Difference]: With dead ends: 8862 [2018-11-07 17:47:12,983 INFO L226 Difference]: Without dead ends: 6667 [2018-11-07 17:47:13,008 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 624 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1097, Invalid=4305, Unknown=0, NotChecked=0, Total=5402 [2018-11-07 17:47:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2018-11-07 17:47:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 5953. [2018-11-07 17:47:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5953 states. [2018-11-07 17:47:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 7216 transitions. [2018-11-07 17:47:13,217 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 7216 transitions. Word has length 291 [2018-11-07 17:47:13,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:47:13,218 INFO L480 AbstractCegarLoop]: Abstraction has 5953 states and 7216 transitions. [2018-11-07 17:47:13,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 17:47:13,219 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 7216 transitions. [2018-11-07 17:47:13,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-11-07 17:47:13,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:47:13,231 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:13,231 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:47:13,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:47:13,232 INFO L82 PathProgramCache]: Analyzing trace with hash -465824905, now seen corresponding path program 1 times [2018-11-07 17:47:13,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:47:13,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:47:13,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:47:13,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:47:13,233 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:47:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:47:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-11-07 17:47:13,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:47:13,678 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:47:13,678 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 294 with the following transitions: [2018-11-07 17:47:13,678 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [874], [878], [889], [892], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:47:13,684 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:47:13,684 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:47:13,880 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:47:14,745 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 17:47:14,746 INFO L272 AbstractInterpreter]: Visited 160 different actions 636 times. Merged at 7 different actions 29 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 17:47:14,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:47:14,783 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 17:47:15,633 INFO L227 lantSequenceWeakener]: Weakened 14 states. On average, predicates are now at 74.31% of their original sizes. [2018-11-07 17:47:15,634 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 17:47:17,570 INFO L415 sIntCurrentIteration]: We unified 292 AI predicates to 292 [2018-11-07 17:47:17,570 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 17:47:17,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 17:47:17,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [4] total 22 [2018-11-07 17:47:17,571 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 17:47:17,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 17:47:17,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 17:47:17,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2018-11-07 17:47:17,574 INFO L87 Difference]: Start difference. First operand 5953 states and 7216 transitions. Second operand 20 states. [2018-11-07 17:47:43,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:47:43,964 INFO L93 Difference]: Finished difference Result 9670 states and 12072 transitions. [2018-11-07 17:47:43,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-07 17:47:43,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 293 [2018-11-07 17:47:43,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:47:43,984 INFO L225 Difference]: With dead ends: 9670 [2018-11-07 17:47:43,985 INFO L226 Difference]: Without dead ends: 6948 [2018-11-07 17:47:43,995 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 314 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=332, Invalid=1390, Unknown=0, NotChecked=0, Total=1722 [2018-11-07 17:47:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6948 states. [2018-11-07 17:47:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6948 to 6916. [2018-11-07 17:47:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6916 states. [2018-11-07 17:47:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6916 states to 6916 states and 8321 transitions. [2018-11-07 17:47:44,155 INFO L78 Accepts]: Start accepts. Automaton has 6916 states and 8321 transitions. Word has length 293 [2018-11-07 17:47:44,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:47:44,156 INFO L480 AbstractCegarLoop]: Abstraction has 6916 states and 8321 transitions. [2018-11-07 17:47:44,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 17:47:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 6916 states and 8321 transitions. [2018-11-07 17:47:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-11-07 17:47:44,165 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:47:44,165 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 17:47:44,165 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:47:44,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:47:44,166 INFO L82 PathProgramCache]: Analyzing trace with hash 738841538, now seen corresponding path program 1 times [2018-11-07 17:47:44,166 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:47:44,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:47:44,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:47:44,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:47:44,167 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:47:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:47:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 189 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 17:47:45,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:47:45,335 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:47:45,335 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 297 with the following transitions: [2018-11-07 17:47:45,335 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [574], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:47:45,338 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:47:45,338 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:47:45,462 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 17:47:46,040 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 17:47:46,041 INFO L272 AbstractInterpreter]: Visited 127 different actions 628 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 17:47:46,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:47:46,051 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 17:47:46,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:47:46,051 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 17:47:46,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:47:46,060 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 17:47:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:47:46,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 17:47:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-07 17:47:46,504 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 17:47:46,734 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-11-07 17:47:46,865 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-11-07 17:47:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-11-07 17:47:47,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 17:47:47,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2018-11-07 17:47:47,306 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 17:47:47,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-07 17:47:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-07 17:47:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2018-11-07 17:47:47,308 INFO L87 Difference]: Start difference. First operand 6916 states and 8321 transitions. Second operand 14 states. [2018-11-07 17:47:49,046 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2018-11-07 17:47:50,333 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2018-11-07 17:47:52,337 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2018-11-07 17:47:53,615 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-11-07 17:48:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 17:48:02,576 INFO L93 Difference]: Finished difference Result 15707 states and 22783 transitions. [2018-11-07 17:48:02,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-11-07 17:48:02,577 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 296 [2018-11-07 17:48:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 17:48:02,648 INFO L225 Difference]: With dead ends: 15707 [2018-11-07 17:48:02,648 INFO L226 Difference]: Without dead ends: 11187 [2018-11-07 17:48:02,689 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 643 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1444, Invalid=6566, Unknown=0, NotChecked=0, Total=8010 [2018-11-07 17:48:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11187 states. [2018-11-07 17:48:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11187 to 10382. [2018-11-07 17:48:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10382 states. [2018-11-07 17:48:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10382 states to 10382 states and 12699 transitions. [2018-11-07 17:48:03,071 INFO L78 Accepts]: Start accepts. Automaton has 10382 states and 12699 transitions. Word has length 296 [2018-11-07 17:48:03,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 17:48:03,071 INFO L480 AbstractCegarLoop]: Abstraction has 10382 states and 12699 transitions. [2018-11-07 17:48:03,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-07 17:48:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10382 states and 12699 transitions. [2018-11-07 17:48:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-11-07 17:48:03,083 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 17:48:03,084 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 17:48:03,084 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 17:48:03,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 17:48:03,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1828580015, now seen corresponding path program 1 times [2018-11-07 17:48:03,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 17:48:03,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:48:03,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:48:03,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 17:48:03,085 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 17:48:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:48:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 34 proven. 221 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-07 17:48:03,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:48:03,860 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 17:48:03,860 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 304 with the following transitions: [2018-11-07 17:48:03,860 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [13], [15], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 17:48:03,863 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 17:48:03,863 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 17:48:03,971 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... [2018-11-07 17:48:04,835 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-07 17:48:04,836 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-07 17:48:04,836 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 17:48:04,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 17:48:04,836 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 17:48:04,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 17:48:04,847 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 17:48:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 17:48:04,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 17:48:04,976 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 17:48:05,177 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 17:48:05,177 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 17:48:05,183 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 17:48:05,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:48:05 BoogieIcfgContainer [2018-11-07 17:48:05,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 17:48:05,185 INFO L168 Benchmark]: Toolchain (without parser) took 213041.58 ms. Allocated memory was 1.5 GB in the beginning and 4.9 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -340.4 MB). Peak memory consumption was 3.0 GB. Max. memory is 7.1 GB. [2018-11-07 17:48:05,186 INFO L168 Benchmark]: CDTParser took 0.22 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 17:48:05,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1016.75 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-07 17:48:05,191 INFO L168 Benchmark]: Boogie Procedure Inliner took 195.31 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -869.9 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2018-11-07 17:48:05,192 INFO L168 Benchmark]: Boogie Preprocessor took 154.11 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 17:48:05,192 INFO L168 Benchmark]: RCFGBuilder took 5237.39 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 169.6 MB). Peak memory consumption was 169.6 MB. Max. memory is 7.1 GB. [2018-11-07 17:48:05,195 INFO L168 Benchmark]: TraceAbstraction took 206433.10 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 296.4 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-11-07 17:48:05,205 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 1016.75 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 195.31 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -869.9 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 154.11 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5237.39 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 169.6 MB). Peak memory consumption was 169.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206433.10 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 296.4 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 27]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 27). Cancelled while BasicCegarLoop was analyzing trace of length 304 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 13 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 206.3s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 176.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3169 SDtfs, 22372 SDslu, 4918 SDs, 0 SdLazy, 36004 SolverSat, 6442 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.6s Time, PredicateUnifierStatistics: 14 DeclaredPredicates, 3148 GetRequests, 2799 SyntacticMatches, 5 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5448 ImplicationChecksByTransitivity, 17.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10382occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.4s AbstIntTime, 10 AbstIntIterations, 7 AbstIntStrong, 0.9973824587618775 AbsIntWeakeningRatio, 0.12213267203967762 AbsIntAvgWeakeningVarsNumRemoved, 20.95040297582145 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 2805 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 3113 NumberOfCodeBlocks, 3113 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 3684 ConstructedInterpolants, 7 QuantifiedInterpolants, 6223825 SizeOfPredicates, 6 NumberOfNonLiveVariables, 1081 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 1934/2378 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown