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/Problem10_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:01:18,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:01:18,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:01:18,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 14:01:18,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 14:01:18,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 14:01:18,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 14:01:18,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 14:01:18,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 14:01:18,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 14:01:18,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 14:01:18,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 14:01:18,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 14:01:18,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 14:01:18,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 14:01:18,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 14:01:18,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 14:01:18,626 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 14:01:18,650 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:01:18,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:01:18,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:01:18,651 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:01:18,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:01:18,652 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:01:18,652 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:01:18,652 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:01:18,652 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:01:18,652 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:01:18,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:01:18,653 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:01:18,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:01:18,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:01:18,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:01:18,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:01:18,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:01:18,654 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:01:18,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:01:18,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:01:18,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:01:18,655 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:01:18,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:01:18,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:01:18,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:01:18,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:01:18,656 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:01:18,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:01:18,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:01:18,657 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:01:18,688 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:01:18,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:01:18,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:01:18,705 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:01:18,706 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:01:18,706 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label00.c [2019-09-09 14:01:18,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/977888dd4/67a8221cb3de4d74b5a540a8cb1a6971/FLAG79ad7bf56 [2019-09-09 14:01:19,335 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:01:19,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label00.c [2019-09-09 14:01:19,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/977888dd4/67a8221cb3de4d74b5a540a8cb1a6971/FLAG79ad7bf56 [2019-09-09 14:01:19,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/977888dd4/67a8221cb3de4d74b5a540a8cb1a6971 [2019-09-09 14:01:19,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:01:19,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:01:19,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:01:19,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:01:19,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:01:19,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:01:19" (1/1) ... [2019-09-09 14:01:19,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d1c6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:19, skipping insertion in model container [2019-09-09 14:01:19,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:01:19" (1/1) ... [2019-09-09 14:01:19,664 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:01:19,737 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:01:20,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:01:20,295 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:01:20,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:01:20,402 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:01:20,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20 WrapperNode [2019-09-09 14:01:20,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:01:20,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:01:20,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:01:20,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:01:20,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20" (1/1) ... [2019-09-09 14:01:20,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20" (1/1) ... [2019-09-09 14:01:20,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20" (1/1) ... [2019-09-09 14:01:20,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20" (1/1) ... [2019-09-09 14:01:20,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20" (1/1) ... [2019-09-09 14:01:20,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20" (1/1) ... [2019-09-09 14:01:20,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20" (1/1) ... [2019-09-09 14:01:20,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:01:20,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:01:20,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:01:20,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:01:20,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20" (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 14:01:20,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:01:20,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:01:20,600 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:01:20,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:01:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:01:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:01:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:01:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:01:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:01:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:01:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:01:21,826 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:01:21,827 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:01:21,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:01:21 BoogieIcfgContainer [2019-09-09 14:01:21,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:01:21,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:01:21,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:01:21,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:01:21,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:01:19" (1/3) ... [2019-09-09 14:01:21,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529de2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:01:21, skipping insertion in model container [2019-09-09 14:01:21,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:01:20" (2/3) ... [2019-09-09 14:01:21,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529de2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:01:21, skipping insertion in model container [2019-09-09 14:01:21,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:01:21" (3/3) ... [2019-09-09 14:01:21,837 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label00.c [2019-09-09 14:01:21,847 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:01:21,857 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:01:21,877 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:01:21,917 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:01:21,918 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:01:21,918 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:01:21,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:01:21,919 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:01:21,919 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:01:21,920 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:01:21,920 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:01:21,962 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:01:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-09 14:01:21,982 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:01:21,983 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:01:21,986 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:01:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:01:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash 446326894, now seen corresponding path program 1 times [2019-09-09 14:01:21,997 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:01:22,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:01:22,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:01:22,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:01:22,053 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:01:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:01:22,376 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 14:01:22,378 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:01:22,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 14:01:22,379 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:01:22,385 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 14:01:22,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 14:01:22,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 14:01:22,403 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-09-09 14:01:23,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:01:23,477 INFO L93 Difference]: Finished difference Result 362 states and 555 transitions. [2019-09-09 14:01:23,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 14:01:23,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-09-09 14:01:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:01:23,511 INFO L225 Difference]: With dead ends: 362 [2019-09-09 14:01:23,511 INFO L226 Difference]: Without dead ends: 294 [2019-09-09 14:01:23,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 14:01:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-09-09 14:01:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-09-09 14:01:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-09-09 14:01:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-09-09 14:01:23,592 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 53 [2019-09-09 14:01:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:01:23,595 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-09-09 14:01:23,595 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 14:01:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-09-09 14:01:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-09 14:01:23,607 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:01:23,608 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:01:23,608 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:01:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:01:23,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1014912959, now seen corresponding path program 1 times [2019-09-09 14:01:23,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:01:23,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:01:23,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:01:23,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:01:23,612 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:01:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:01:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:01:23,927 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:01:23,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:01:23,929 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:01:23,931 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:01:23,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:01:23,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:01:23,932 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-09-09 14:01:25,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:01:25,146 INFO L93 Difference]: Finished difference Result 866 states and 1202 transitions. [2019-09-09 14:01:25,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:01:25,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-09-09 14:01:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:01:25,155 INFO L225 Difference]: With dead ends: 866 [2019-09-09 14:01:25,156 INFO L226 Difference]: Without dead ends: 866 [2019-09-09 14:01:25,157 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 14:01:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-09-09 14:01:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 723. [2019-09-09 14:01:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2019-09-09 14:01:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1036 transitions. [2019-09-09 14:01:25,205 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1036 transitions. Word has length 172 [2019-09-09 14:01:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:01:25,206 INFO L475 AbstractCegarLoop]: Abstraction has 723 states and 1036 transitions. [2019-09-09 14:01:25,206 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:01:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1036 transitions. [2019-09-09 14:01:25,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-09 14:01:25,211 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:01:25,212 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:01:25,212 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:01:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:01:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1103795558, now seen corresponding path program 1 times [2019-09-09 14:01:25,213 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:01:25,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:01:25,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:01:25,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:01:25,214 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:01:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:01:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:01:25,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:01:25,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:01:25,515 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:01:25,516 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:01:25,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:01:25,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:01:25,516 INFO L87 Difference]: Start difference. First operand 723 states and 1036 transitions. Second operand 6 states. [2019-09-09 14:01:26,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:01:26,460 INFO L93 Difference]: Finished difference Result 896 states and 1207 transitions. [2019-09-09 14:01:26,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:01:26,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 179 [2019-09-09 14:01:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:01:26,467 INFO L225 Difference]: With dead ends: 896 [2019-09-09 14:01:26,467 INFO L226 Difference]: Without dead ends: 896 [2019-09-09 14:01:26,468 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 14:01:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-09-09 14:01:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 880. [2019-09-09 14:01:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-09-09 14:01:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1167 transitions. [2019-09-09 14:01:26,502 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1167 transitions. Word has length 179 [2019-09-09 14:01:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:01:26,503 INFO L475 AbstractCegarLoop]: Abstraction has 880 states and 1167 transitions. [2019-09-09 14:01:26,503 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:01:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1167 transitions. [2019-09-09 14:01:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-09-09 14:01:26,516 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:01:26,517 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:01:26,517 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:01:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:01:26,518 INFO L82 PathProgramCache]: Analyzing trace with hash -630428119, now seen corresponding path program 1 times [2019-09-09 14:01:26,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:01:26,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:01:26,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:01:26,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:01:26,519 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:01:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:01:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 92 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 14:01:26,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:01:26,818 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:01:26,819 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 249 with the following transitions: [2019-09-09 14:01:26,822 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [333], [335], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [494], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [722], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:01:26,934 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:01:26,935 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:02:04,680 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:02:04,683 INFO L272 AbstractInterpreter]: Visited 131 different actions 131 times. Never merged. Never widened. Performed 168 root evaluator evaluations with a maximum evaluation depth of 16. Performed 168 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 14:02:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:02:04,687 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:02:34,881 INFO L227 lantSequenceWeakener]: Weakened 239 states. On average, predicates are now at 73.28% of their original sizes. [2019-09-09 14:02:34,881 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:02:34,925 INFO L420 sIntCurrentIteration]: We unified 247 AI predicates to 247 [2019-09-09 14:02:34,925 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:02:34,926 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:02:34,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-09-09 14:02:34,927 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:02:34,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 14:02:34,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 14:02:34,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 14:02:34,928 INFO L87 Difference]: Start difference. First operand 880 states and 1167 transitions. Second operand 7 states. [2019-09-09 14:02:39,296 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:04:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:04:22,029 INFO L93 Difference]: Finished difference Result 1024 states and 1319 transitions. [2019-09-09 14:04:22,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:04:22,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 248 [2019-09-09 14:04:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:04:22,036 INFO L225 Difference]: With dead ends: 1024 [2019-09-09 14:04:22,036 INFO L226 Difference]: Without dead ends: 1024 [2019-09-09 14:04:22,037 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-09-09 14:04:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2019-09-09 14:04:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1023. [2019-09-09 14:04:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2019-09-09 14:04:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1318 transitions. [2019-09-09 14:04:22,085 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1318 transitions. Word has length 248 [2019-09-09 14:04:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:04:22,087 INFO L475 AbstractCegarLoop]: Abstraction has 1023 states and 1318 transitions. [2019-09-09 14:04:22,087 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 14:04:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1318 transitions. [2019-09-09 14:04:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-09-09 14:04:22,093 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:04:22,094 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-09-09 14:04:22,094 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:04:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:04:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash 144192093, now seen corresponding path program 1 times [2019-09-09 14:04:22,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:04:22,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:04:22,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:04:22,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:04:22,098 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:04:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:04:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:04:22,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:04:22,324 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:04:22,325 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 259 with the following transitions: [2019-09-09 14:04:22,325 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [333], [335], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [722], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:04:22,333 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:04:22,333 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:04:32,819 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:05:34,957 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:05:34,959 INFO L272 AbstractInterpreter]: Visited 134 different actions 261 times. Merged at 3 different actions 3 times. Never widened. Performed 395 root evaluator evaluations with a maximum evaluation depth of 16. Performed 395 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:05:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:05:34,959 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:06:14,034 INFO L227 lantSequenceWeakener]: Weakened 255 states. On average, predicates are now at 73.28% of their original sizes. [2019-09-09 14:06:14,034 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:06:14,116 INFO L420 sIntCurrentIteration]: We unified 257 AI predicates to 257 [2019-09-09 14:06:14,116 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:06:14,117 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:06:14,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 14:06:14,117 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:06:14,118 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:06:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:06:14,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:06:14,119 INFO L87 Difference]: Start difference. First operand 1023 states and 1318 transitions. Second operand 11 states. [2019-09-09 14:10:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:10:39,251 INFO L93 Difference]: Finished difference Result 1190 states and 1486 transitions. [2019-09-09 14:10:39,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 14:10:39,252 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 258 [2019-09-09 14:10:39,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:10:39,257 INFO L225 Difference]: With dead ends: 1190 [2019-09-09 14:10:39,257 INFO L226 Difference]: Without dead ends: 1024 [2019-09-09 14:10:39,258 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 248 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 14:10:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2019-09-09 14:10:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1023. [2019-09-09 14:10:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2019-09-09 14:10:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1317 transitions. [2019-09-09 14:10:39,286 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1317 transitions. Word has length 258 [2019-09-09 14:10:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:10:39,286 INFO L475 AbstractCegarLoop]: Abstraction has 1023 states and 1317 transitions. [2019-09-09 14:10:39,286 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:10:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1317 transitions. [2019-09-09 14:10:39,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-09-09 14:10:39,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:10:39,293 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:10:39,293 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:10:39,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:10:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash 56197093, now seen corresponding path program 1 times [2019-09-09 14:10:39,294 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:10:39,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:10:39,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:10:39,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:10:39,295 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:10:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:10:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 14:10:39,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:10:39,582 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:10:39,583 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 295 with the following transitions: [2019-09-09 14:10:39,589 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [333], [335], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [722], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:10:39,602 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:10:39,602 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:11:12,009 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:12:30,193 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:12:30,193 INFO L272 AbstractInterpreter]: Visited 134 different actions 262 times. Merged at 4 different actions 4 times. Never widened. Performed 497 root evaluator evaluations with a maximum evaluation depth of 16. Performed 497 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:12:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:12:30,194 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:14:15,893 INFO L227 lantSequenceWeakener]: Weakened 291 states. On average, predicates are now at 73.21% of their original sizes. [2019-09-09 14:14:15,894 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:14:16,005 INFO L420 sIntCurrentIteration]: We unified 293 AI predicates to 293 [2019-09-09 14:14:16,005 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:14:16,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:14:16,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 14:14:16,006 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:14:16,006 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 14:14:16,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 14:14:16,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-09-09 14:14:16,007 INFO L87 Difference]: Start difference. First operand 1023 states and 1317 transitions. Second operand 12 states.