java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:29:54,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:29:54,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:29:54,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:29:54,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:29:54,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:29:54,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:29:54,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:29:54,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:29:54,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:29:54,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:29:54,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:29:54,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:29:54,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:29:54,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:29:54,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 18:29:54,276 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:29:54,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:29:54,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:29:54,279 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:29:54,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:29:54,280 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:29:54,281 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:29:54,281 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:29:54,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:29:54,281 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:29:54,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:29:54,283 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:29:54,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:29:54,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:29:54,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:29:54,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:29:54,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:29:54,284 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:29:54,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:29:54,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:29:54,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:29:54,285 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:29:54,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:29:54,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:29:54,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:29:54,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:29:54,287 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:29:54,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:29:54,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:29:54,287 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:29:54,339 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:29:54,352 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:29:54,356 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:29:54,357 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:29:54,357 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:29:54,358 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label43.c [2019-09-09 18:29:54,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dcb38515/846ba98149244f54ae794fcb802f47a3/FLAG90e80cbf9 [2019-09-09 18:29:54,993 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:29:54,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label43.c [2019-09-09 18:29:55,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dcb38515/846ba98149244f54ae794fcb802f47a3/FLAG90e80cbf9 [2019-09-09 18:29:55,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dcb38515/846ba98149244f54ae794fcb802f47a3 [2019-09-09 18:29:55,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:29:55,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:29:55,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:29:55,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:29:55,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:29:55,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:29:55" (1/1) ... [2019-09-09 18:29:55,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e8182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:55, skipping insertion in model container [2019-09-09 18:29:55,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:29:55" (1/1) ... [2019-09-09 18:29:55,300 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:29:55,364 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:29:55,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:29:55,974 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:29:56,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:29:56,125 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:29:56,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56 WrapperNode [2019-09-09 18:29:56,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:29:56,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:29:56,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:29:56,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:29:56,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56" (1/1) ... [2019-09-09 18:29:56,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56" (1/1) ... [2019-09-09 18:29:56,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56" (1/1) ... [2019-09-09 18:29:56,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56" (1/1) ... [2019-09-09 18:29:56,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56" (1/1) ... [2019-09-09 18:29:56,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56" (1/1) ... [2019-09-09 18:29:56,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56" (1/1) ... [2019-09-09 18:29:56,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:29:56,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:29:56,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:29:56,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:29:56,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56" (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 [2019-09-09 18:29:56,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:29:56,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:29:56,366 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:29:56,366 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:29:56,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:29:56,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:29:56,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:29:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:29:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:29:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:29:56,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:29:57,772 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:29:57,773 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:29:57,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:29:57 BoogieIcfgContainer [2019-09-09 18:29:57,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:29:57,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:29:57,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:29:57,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:29:57,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:29:55" (1/3) ... [2019-09-09 18:29:57,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfea52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:29:57, skipping insertion in model container [2019-09-09 18:29:57,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:29:56" (2/3) ... [2019-09-09 18:29:57,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfea52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:29:57, skipping insertion in model container [2019-09-09 18:29:57,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:29:57" (3/3) ... [2019-09-09 18:29:57,786 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label43.c [2019-09-09 18:29:57,796 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:29:57,805 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:29:57,822 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:29:57,849 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:29:57,850 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:29:57,850 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:29:57,850 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:29:57,850 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:29:57,850 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:29:57,851 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:29:57,851 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:29:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:29:57,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-09 18:29:57,884 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:29:57,885 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:29:57,888 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:29:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:29:57,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1143384842, now seen corresponding path program 1 times [2019-09-09 18:29:57,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:29:57,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:29:57,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:29:57,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:29:57,938 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:29:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:29:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:29:58,132 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:29:58,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:29:58,132 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:29:58,138 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:29:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:29:58,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:29:58,157 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-09-09 18:29:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:29:59,409 INFO L93 Difference]: Finished difference Result 440 states and 711 transitions. [2019-09-09 18:29:59,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:29:59,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-09-09 18:29:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:29:59,430 INFO L225 Difference]: With dead ends: 440 [2019-09-09 18:29:59,430 INFO L226 Difference]: Without dead ends: 372 [2019-09-09 18:29:59,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:29:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-09-09 18:29:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-09-09 18:29:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:29:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-09-09 18:29:59,512 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 21 [2019-09-09 18:29:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:29:59,513 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-09-09 18:29:59,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:29:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-09-09 18:29:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-09 18:29:59,518 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:29:59,518 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 18:29:59,519 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:29:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:29:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1758836454, now seen corresponding path program 1 times [2019-09-09 18:29:59,520 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:29:59,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:29:59,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:29:59,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:29:59,521 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:29:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:29:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:29:59,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:29:59,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:29:59,796 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:29:59,798 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:29:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:29:59,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:29:59,799 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-09-09 18:30:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:01,129 INFO L93 Difference]: Finished difference Result 570 states and 828 transitions. [2019-09-09 18:30:01,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 18:30:01,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-09-09 18:30:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:01,135 INFO L225 Difference]: With dead ends: 570 [2019-09-09 18:30:01,135 INFO L226 Difference]: Without dead ends: 570 [2019-09-09 18:30:01,136 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 18:30:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-09-09 18:30:01,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-09-09 18:30:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-09-09 18:30:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-09-09 18:30:01,169 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 107 [2019-09-09 18:30:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:01,169 INFO L475 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-09-09 18:30:01,170 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:30:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-09-09 18:30:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-09 18:30:01,173 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:01,174 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:30:01,174 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:01,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1887369717, now seen corresponding path program 1 times [2019-09-09 18:30:01,175 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:01,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:01,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:01,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:01,176 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:01,313 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:30:01,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:30:01,313 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:01,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:30:01,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:30:01,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:01,316 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-09-09 18:30:02,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:30:02,902 INFO L93 Difference]: Finished difference Result 1662 states and 2318 transitions. [2019-09-09 18:30:02,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:30:02,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-09-09 18:30:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:30:02,914 INFO L225 Difference]: With dead ends: 1662 [2019-09-09 18:30:02,914 INFO L226 Difference]: Without dead ends: 1662 [2019-09-09 18:30:02,915 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:30:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-09-09 18:30:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1478. [2019-09-09 18:30:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1478 states. [2019-09-09 18:30:02,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 2054 transitions. [2019-09-09 18:30:02,966 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 2054 transitions. Word has length 116 [2019-09-09 18:30:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:30:02,967 INFO L475 AbstractCegarLoop]: Abstraction has 1478 states and 2054 transitions. [2019-09-09 18:30:02,967 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:30:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 2054 transitions. [2019-09-09 18:30:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-09 18:30:02,974 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:30:02,974 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:30:02,975 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:30:02,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:02,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1771960234, now seen corresponding path program 1 times [2019-09-09 18:30:02,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:30:02,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:02,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:30:02,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:30:02,977 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:30:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:30:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:30:03,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:30:03,827 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:30:03,828 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2019-09-09 18:30:03,831 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [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], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:30:03,879 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:30:03,880 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:30:13,507 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:30:13,509 INFO L272 AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Performed 273 root evaluator evaluations with a maximum evaluation depth of 13. Performed 273 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:30:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:30:13,514 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:30:21,465 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 77.48% of their original sizes. [2019-09-09 18:30:21,465 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:30:21,572 INFO L420 sIntCurrentIteration]: We unified 218 AI predicates to 218 [2019-09-09 18:30:21,572 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:30:21,573 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:30:21,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2019-09-09 18:30:21,574 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:30:21,575 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:30:21,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:30:21,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:30:21,576 INFO L87 Difference]: Start difference. First operand 1478 states and 2054 transitions. Second operand 11 states. [2019-09-09 18:31:56,950 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:33:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:33:48,837 INFO L93 Difference]: Finished difference Result 1664 states and 2251 transitions. [2019-09-09 18:33:48,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:33:48,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 219 [2019-09-09 18:33:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:33:48,846 INFO L225 Difference]: With dead ends: 1664 [2019-09-09 18:33:48,846 INFO L226 Difference]: Without dead ends: 1664 [2019-09-09 18:33:48,847 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 18:33:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-09-09 18:33:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1660. [2019-09-09 18:33:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1660 states. [2019-09-09 18:33:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2244 transitions. [2019-09-09 18:33:48,893 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2244 transitions. Word has length 219 [2019-09-09 18:33:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:33:48,894 INFO L475 AbstractCegarLoop]: Abstraction has 1660 states and 2244 transitions. [2019-09-09 18:33:48,894 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:33:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2244 transitions. [2019-09-09 18:33:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-09-09 18:33:48,898 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:33:48,899 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:33:48,899 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:33:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:33:48,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1331053746, now seen corresponding path program 1 times [2019-09-09 18:33:48,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:33:48,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:33:48,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:33:48,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:33:48,902 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:33:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:33:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 128 proven. 164 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:33:49,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:33:49,788 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:33:49,789 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 304 with the following transitions: [2019-09-09 18:33:49,789 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [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], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:33:49,797 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:33:49,797 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:34:01,669 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:34:01,671 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:34:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:34:01,672 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:34:05,789 INFO L227 lantSequenceWeakener]: Weakened 300 states. On average, predicates are now at 77.34% of their original sizes. [2019-09-09 18:34:05,790 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:34:05,876 INFO L420 sIntCurrentIteration]: We unified 302 AI predicates to 302 [2019-09-09 18:34:05,877 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:34:05,877 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:34:05,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:34:05,878 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:34:05,879 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:34:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:34:05,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:34:05,880 INFO L87 Difference]: Start difference. First operand 1660 states and 2244 transitions. Second operand 11 states. [2019-09-09 18:34:39,548 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:38:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:38:19,810 INFO L93 Difference]: Finished difference Result 1876 states and 2460 transitions. [2019-09-09 18:38:19,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:38:19,810 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 303 [2019-09-09 18:38:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:38:19,818 INFO L225 Difference]: With dead ends: 1876 [2019-09-09 18:38:19,819 INFO L226 Difference]: Without dead ends: 1661 [2019-09-09 18:38:19,819 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:38:19,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2019-09-09 18:38:19,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1660. [2019-09-09 18:38:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1660 states. [2019-09-09 18:38:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2238 transitions. [2019-09-09 18:38:19,876 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2238 transitions. Word has length 303 [2019-09-09 18:38:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:38:19,877 INFO L475 AbstractCegarLoop]: Abstraction has 1660 states and 2238 transitions. [2019-09-09 18:38:19,877 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:38:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2238 transitions. [2019-09-09 18:38:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2019-09-09 18:38:19,883 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:38:19,883 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:38:19,884 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:38:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:38:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2144738786, now seen corresponding path program 1 times [2019-09-09 18:38:19,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:38:19,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:38:19,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:38:19,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:38:19,886 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:38:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:38:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 53 proven. 267 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:38:20,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:38:20,686 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:38:20,687 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 330 with the following transitions: [2019-09-09 18:38:20,687 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [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], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:38:20,692 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:38:20,692 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:38:36,003 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:38:36,004 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 565 root evaluator evaluations with a maximum evaluation depth of 13. Performed 565 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:38:36,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:38:36,004 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:38:47,166 INFO L227 lantSequenceWeakener]: Weakened 326 states. On average, predicates are now at 77.33% of their original sizes. [2019-09-09 18:38:47,166 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:38:47,246 INFO L420 sIntCurrentIteration]: We unified 328 AI predicates to 328 [2019-09-09 18:38:47,246 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:38:47,246 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:38:47,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2019-09-09 18:38:47,247 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:38:47,247 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:38:47,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:38:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:38:47,248 INFO L87 Difference]: Start difference. First operand 1660 states and 2238 transitions. Second operand 11 states. [2019-09-09 18:39:29,146 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:40:42,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:40:42,651 INFO L93 Difference]: Finished difference Result 1846 states and 2438 transitions. [2019-09-09 18:40:42,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:40:42,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 329 [2019-09-09 18:40:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:40:42,661 INFO L225 Difference]: With dead ends: 1846 [2019-09-09 18:40:42,661 INFO L226 Difference]: Without dead ends: 1846 [2019-09-09 18:40:42,661 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:40:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2019-09-09 18:40:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1844. [2019-09-09 18:40:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1844 states. [2019-09-09 18:40:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2436 transitions. [2019-09-09 18:40:42,705 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2436 transitions. Word has length 329 [2019-09-09 18:40:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:40:42,706 INFO L475 AbstractCegarLoop]: Abstraction has 1844 states and 2436 transitions. [2019-09-09 18:40:42,706 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:40:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2436 transitions. [2019-09-09 18:40:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2019-09-09 18:40:42,713 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:40:42,714 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:40:42,714 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:40:42,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:40:42,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1301990694, now seen corresponding path program 1 times [2019-09-09 18:40:42,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:40:42,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:40:42,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:40:42,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:40:42,716 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:40:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:40:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 146 proven. 166 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2019-09-09 18:40:42,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:40:42,988 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:40:42,988 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 414 with the following transitions: [2019-09-09 18:40:42,989 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [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], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:40:42,993 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:40:42,993 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:41:06,743 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-09 18:41:06,744 INFO L272 AbstractInterpreter]: Visited 123 different actions 482 times. Merged at 6 different actions 23 times. Never widened. Performed 948 root evaluator evaluations with a maximum evaluation depth of 13. Performed 948 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 5 fixpoints after 3 different actions. Largest state had 24 variables. [2019-09-09 18:41:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:41:06,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-09 18:41:06,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:41:06,746 INFO L193 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 [2019-09-09 18:41:06,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:41:06,784 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-09 18:41:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:41:06,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-09 18:41:06,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-09 18:41:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 472 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-09-09 18:41:07,127 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-09 18:41:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 146 proven. 166 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2019-09-09 18:41:07,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-09 18:41:07,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2019-09-09 18:41:07,356 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-09 18:41:07,358 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-09 18:41:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-09 18:41:07,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:41:07,358 INFO L87 Difference]: Start difference. First operand 1844 states and 2436 transitions. Second operand 9 states. [2019-09-09 18:41:10,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:41:10,071 INFO L93 Difference]: Finished difference Result 2612 states and 3431 transitions. [2019-09-09 18:41:10,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:41:10,072 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 413 [2019-09-09 18:41:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:41:10,087 INFO L225 Difference]: With dead ends: 2612 [2019-09-09 18:41:10,087 INFO L226 Difference]: Without dead ends: 2612 [2019-09-09 18:41:10,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 827 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-09-09 18:41:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2019-09-09 18:41:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2060. [2019-09-09 18:41:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2060 states. [2019-09-09 18:41:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2692 transitions. [2019-09-09 18:41:10,144 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2692 transitions. Word has length 413 [2019-09-09 18:41:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:41:10,145 INFO L475 AbstractCegarLoop]: Abstraction has 2060 states and 2692 transitions. [2019-09-09 18:41:10,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-09 18:41:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2692 transitions. [2019-09-09 18:41:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2019-09-09 18:41:10,154 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:41:10,154 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-09-09 18:41:10,155 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:41:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:41:10,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1804299621, now seen corresponding path program 1 times [2019-09-09 18:41:10,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:41:10,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:41:10,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:41:10,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:41:10,156 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:41:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:41:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 162 proven. 432 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:41:11,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:41:11,045 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:41:11,045 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 417 with the following transitions: [2019-09-09 18:41:11,046 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [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], [562], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:41:11,052 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:41:11,052 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:41:29,935 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-09 18:41:29,936 INFO L272 AbstractInterpreter]: Visited 123 different actions 358 times. Merged at 6 different actions 11 times. Never widened. Performed 720 root evaluator evaluations with a maximum evaluation depth of 13. Performed 720 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 3 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:41:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:41:29,937 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-09 18:41:29,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:41:29,937 INFO L193 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 [2019-09-09 18:41:29,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:41:29,948 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-09 18:41:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:41:30,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-09 18:41:30,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-09 18:41:30,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-09-09 18:41:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 364 proven. 135 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-09-09 18:41:30,417 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-09 18:41:30,486 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-09-09 18:41:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 75 proven. 435 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-09-09 18:41:31,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-09 18:41:31,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 24 [2019-09-09 18:41:31,056 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-09 18:41:31,057 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-09 18:41:31,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-09 18:41:31,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2019-09-09 18:41:31,058 INFO L87 Difference]: Start difference. First operand 2060 states and 2692 transitions. Second operand 19 states. [2019-09-09 18:41:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:41:35,813 INFO L93 Difference]: Finished difference Result 2725 states and 3470 transitions. [2019-09-09 18:41:35,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-09 18:41:35,814 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 416 [2019-09-09 18:41:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:41:35,826 INFO L225 Difference]: With dead ends: 2725 [2019-09-09 18:41:35,827 INFO L226 Difference]: Without dead ends: 2680 [2019-09-09 18:41:35,828 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 848 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=546, Invalid=1806, Unknown=0, NotChecked=0, Total=2352 [2019-09-09 18:41:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2019-09-09 18:41:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2628. [2019-09-09 18:41:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2628 states. [2019-09-09 18:41:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 3106 transitions. [2019-09-09 18:41:35,892 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 3106 transitions. Word has length 416 [2019-09-09 18:41:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:41:35,893 INFO L475 AbstractCegarLoop]: Abstraction has 2628 states and 3106 transitions. [2019-09-09 18:41:35,893 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-09 18:41:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 3106 transitions. [2019-09-09 18:41:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2019-09-09 18:41:35,901 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:41:35,902 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:41:35,902 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:41:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:41:35,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1277138289, now seen corresponding path program 1 times [2019-09-09 18:41:35,903 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:41:35,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:41:35,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:41:35,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:41:35,904 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:41:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:41:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-09-09 18:41:36,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:41:36,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:41:36,308 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 439 with the following transitions: [2019-09-09 18:41:36,308 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [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], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:41:36,311 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:41:36,311 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:41:50,383 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:42:07,979 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:42:07,980 INFO L272 AbstractInterpreter]: Visited 122 different actions 476 times. Merged at 6 different actions 18 times. Never widened. Performed 880 root evaluator evaluations with a maximum evaluation depth of 22. Performed 880 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:42:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:42:07,980 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:42:18,511 INFO L227 lantSequenceWeakener]: Weakened 435 states. On average, predicates are now at 77.33% of their original sizes. [2019-09-09 18:42:18,511 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:42:18,569 INFO L420 sIntCurrentIteration]: We unified 437 AI predicates to 437 [2019-09-09 18:42:18,569 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:42:18,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:42:18,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:42:18,570 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:42:18,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:42:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:42:18,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:42:18,571 INFO L87 Difference]: Start difference. First operand 2628 states and 3106 transitions. Second operand 10 states.