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/Problem11_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:32:17,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:32:17,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:32:17,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 15:32:17,529 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 15:32:17,544 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:32:17,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:32:17,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:32:17,545 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:32:17,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:32:17,546 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:32:17,546 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:32:17,546 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:32:17,546 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:32:17,547 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:32:17,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:32:17,547 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:32:17,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:32:17,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:32:17,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:32:17,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:32:17,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:32:17,549 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:32:17,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:32:17,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:32:17,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:32:17,549 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:32:17,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:32:17,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:32:17,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:32:17,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:32:17,550 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:32:17,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:32:17,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:32:17,551 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:32:17,580 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:32:17,592 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:32:17,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:32:17,597 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:32:17,597 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:32:17,598 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label39.c [2019-09-09 15:32:17,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674d86c90/d2b209d70dee4d05a69c55c14a2d14ed/FLAGc951fe9de [2019-09-09 15:32:18,256 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:32:18,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label39.c [2019-09-09 15:32:18,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674d86c90/d2b209d70dee4d05a69c55c14a2d14ed/FLAGc951fe9de [2019-09-09 15:32:18,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674d86c90/d2b209d70dee4d05a69c55c14a2d14ed [2019-09-09 15:32:18,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:32:18,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:32:18,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:32:18,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:32:18,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:32:18,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:32:18" (1/1) ... [2019-09-09 15:32:18,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151681b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:18, skipping insertion in model container [2019-09-09 15:32:18,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:32:18" (1/1) ... [2019-09-09 15:32:18,482 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:32:18,542 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:32:19,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:32:19,236 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:32:19,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:32:19,475 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:32:19,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19 WrapperNode [2019-09-09 15:32:19,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:32:19,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:32:19,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:32:19,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:32:19,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19" (1/1) ... [2019-09-09 15:32:19,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19" (1/1) ... [2019-09-09 15:32:19,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19" (1/1) ... [2019-09-09 15:32:19,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19" (1/1) ... [2019-09-09 15:32:19,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19" (1/1) ... [2019-09-09 15:32:19,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19" (1/1) ... [2019-09-09 15:32:19,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19" (1/1) ... [2019-09-09 15:32:19,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:32:19,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:32:19,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:32:19,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:32:19,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19" (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 15:32:19,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:32:19,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:32:19,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:32:19,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:32:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:32:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:32:19,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:32:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:32:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:32:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:32:19,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:32:21,511 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:32:21,512 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:32:21,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:32:21 BoogieIcfgContainer [2019-09-09 15:32:21,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:32:21,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:32:21,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:32:21,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:32:21,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:32:18" (1/3) ... [2019-09-09 15:32:21,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe7e3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:32:21, skipping insertion in model container [2019-09-09 15:32:21,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:32:19" (2/3) ... [2019-09-09 15:32:21,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe7e3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:32:21, skipping insertion in model container [2019-09-09 15:32:21,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:32:21" (3/3) ... [2019-09-09 15:32:21,524 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label39.c [2019-09-09 15:32:21,534 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:32:21,547 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:32:21,567 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:32:21,602 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:32:21,603 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:32:21,603 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:32:21,604 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:32:21,605 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:32:21,605 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:32:21,605 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:32:21,605 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:32:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-09-09 15:32:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-09 15:32:21,648 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:32:21,649 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:32:21,650 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:32:21,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:32:21,655 INFO L82 PathProgramCache]: Analyzing trace with hash 284650251, now seen corresponding path program 1 times [2019-09-09 15:32:21,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:32:21,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:21,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:32:21,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:21,701 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:32:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:32:21,862 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 15:32:21,864 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:32:21,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 15:32:21,865 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:32:21,871 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 15:32:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 15:32:21,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 15:32:21,891 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-09-09 15:32:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:32:23,485 INFO L93 Difference]: Finished difference Result 494 states and 682 transitions. [2019-09-09 15:32:23,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 15:32:23,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-09 15:32:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:32:23,506 INFO L225 Difference]: With dead ends: 494 [2019-09-09 15:32:23,507 INFO L226 Difference]: Without dead ends: 425 [2019-09-09 15:32:23,509 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 15:32:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-09-09 15:32:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2019-09-09 15:32:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2019-09-09 15:32:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 613 transitions. [2019-09-09 15:32:23,587 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 613 transitions. Word has length 16 [2019-09-09 15:32:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:32:23,588 INFO L475 AbstractCegarLoop]: Abstraction has 425 states and 613 transitions. [2019-09-09 15:32:23,588 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 15:32:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 613 transitions. [2019-09-09 15:32:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-09 15:32:23,592 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:32:23,593 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 15:32:23,593 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:32:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:32:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash 137345354, now seen corresponding path program 1 times [2019-09-09 15:32:23,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:32:23,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:23,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:32:23,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:23,596 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:32:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:32:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:32:23,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:32:23,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:32:23,822 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:32:23,824 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:32:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:32:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:32:23,825 INFO L87 Difference]: Start difference. First operand 425 states and 613 transitions. Second operand 6 states. [2019-09-09 15:32:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:32:25,470 INFO L93 Difference]: Finished difference Result 829 states and 1189 transitions. [2019-09-09 15:32:25,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 15:32:25,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2019-09-09 15:32:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:32:25,479 INFO L225 Difference]: With dead ends: 829 [2019-09-09 15:32:25,479 INFO L226 Difference]: Without dead ends: 829 [2019-09-09 15:32:25,481 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 15:32:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2019-09-09 15:32:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 816. [2019-09-09 15:32:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2019-09-09 15:32:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1166 transitions. [2019-09-09 15:32:25,539 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1166 transitions. Word has length 88 [2019-09-09 15:32:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:32:25,539 INFO L475 AbstractCegarLoop]: Abstraction has 816 states and 1166 transitions. [2019-09-09 15:32:25,539 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:32:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1166 transitions. [2019-09-09 15:32:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-09 15:32:25,543 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:32:25,543 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 15:32:25,543 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:32:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:32:25,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1739121885, now seen corresponding path program 1 times [2019-09-09 15:32:25,544 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:32:25,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:25,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:32:25,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:25,546 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:32:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:32:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:32:25,668 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:32:25,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 15:32:25,668 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:32:25,669 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 15:32:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 15:32:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 15:32:25,670 INFO L87 Difference]: Start difference. First operand 816 states and 1166 transitions. Second operand 4 states. [2019-09-09 15:32:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:32:27,385 INFO L93 Difference]: Finished difference Result 1400 states and 2014 transitions. [2019-09-09 15:32:27,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 15:32:27,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2019-09-09 15:32:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:32:27,396 INFO L225 Difference]: With dead ends: 1400 [2019-09-09 15:32:27,396 INFO L226 Difference]: Without dead ends: 1400 [2019-09-09 15:32:27,397 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 15:32:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2019-09-09 15:32:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1398. [2019-09-09 15:32:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1398 states. [2019-09-09 15:32:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2010 transitions. [2019-09-09 15:32:27,452 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2010 transitions. Word has length 89 [2019-09-09 15:32:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:32:27,453 INFO L475 AbstractCegarLoop]: Abstraction has 1398 states and 2010 transitions. [2019-09-09 15:32:27,453 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 15:32:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2010 transitions. [2019-09-09 15:32:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-09 15:32:27,458 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:32:27,458 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 15:32:27,458 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:32:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:32:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1858445134, now seen corresponding path program 1 times [2019-09-09 15:32:27,459 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:32:27,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:27,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:32:27,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:27,461 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:32:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:32:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:32:27,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:32:27,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 15:32:27,600 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:32:27,602 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 15:32:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 15:32:27,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 15:32:27,603 INFO L87 Difference]: Start difference. First operand 1398 states and 2010 transitions. Second operand 5 states. [2019-09-09 15:32:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:32:29,463 INFO L93 Difference]: Finished difference Result 2623 states and 3616 transitions. [2019-09-09 15:32:29,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 15:32:29,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2019-09-09 15:32:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:32:29,491 INFO L225 Difference]: With dead ends: 2623 [2019-09-09 15:32:29,491 INFO L226 Difference]: Without dead ends: 2623 [2019-09-09 15:32:29,492 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 15:32:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2623 states. [2019-09-09 15:32:29,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2623 to 2597. [2019-09-09 15:32:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2019-09-09 15:32:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3544 transitions. [2019-09-09 15:32:29,605 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3544 transitions. Word has length 102 [2019-09-09 15:32:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:32:29,606 INFO L475 AbstractCegarLoop]: Abstraction has 2597 states and 3544 transitions. [2019-09-09 15:32:29,606 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 15:32:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3544 transitions. [2019-09-09 15:32:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-09 15:32:29,617 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:32:29,617 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:32:29,618 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:32:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:32:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1024150850, now seen corresponding path program 1 times [2019-09-09 15:32:29,618 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:32:29,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:29,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:32:29,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:29,620 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:32:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:32:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:32:29,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:32:29,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 15:32:29,761 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:32:29,762 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 15:32:29,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 15:32:29,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 15:32:29,763 INFO L87 Difference]: Start difference. First operand 2597 states and 3544 transitions. Second operand 4 states. [2019-09-09 15:32:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:32:31,581 INFO L93 Difference]: Finished difference Result 5504 states and 7506 transitions. [2019-09-09 15:32:31,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 15:32:31,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2019-09-09 15:32:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:32:31,627 INFO L225 Difference]: With dead ends: 5504 [2019-09-09 15:32:31,627 INFO L226 Difference]: Without dead ends: 5504 [2019-09-09 15:32:31,628 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 15:32:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2019-09-09 15:32:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 5282. [2019-09-09 15:32:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5282 states. [2019-09-09 15:32:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 7163 transitions. [2019-09-09 15:32:31,953 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 7163 transitions. Word has length 110 [2019-09-09 15:32:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:32:31,955 INFO L475 AbstractCegarLoop]: Abstraction has 5282 states and 7163 transitions. [2019-09-09 15:32:31,955 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 15:32:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 7163 transitions. [2019-09-09 15:32:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-09 15:32:31,969 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:32:31,969 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:32:31,970 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:32:31,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:32:31,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1434196844, now seen corresponding path program 1 times [2019-09-09 15:32:31,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:32:31,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:31,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:32:31,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:32:31,973 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:32:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:32:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-09-09 15:32:32,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:32:32,343 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:32:32,344 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2019-09-09 15:32:32,346 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [37], [39], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [526], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-09-09 15:32:32,418 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:32:32,419 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:36:12,684 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 15:38:54,695 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:38:54,698 INFO L272 AbstractInterpreter]: Visited 139 different actions 273 times. Merged at 4 different actions 5 times. Never widened. Performed 655 root evaluator evaluations with a maximum evaluation depth of 17. Performed 655 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2019-09-09 15:38:54,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:38:54,704 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:41:36,857 INFO L227 lantSequenceWeakener]: Weakened 221 states. On average, predicates are now at 72.98% of their original sizes. [2019-09-09 15:41:36,857 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:41:36,998 INFO L420 sIntCurrentIteration]: We unified 223 AI predicates to 223 [2019-09-09 15:41:36,998 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:41:36,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:41:36,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2019-09-09 15:41:37,000 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:41:37,000 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-09 15:41:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-09 15:41:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-09-09 15:41:37,001 INFO L87 Difference]: Start difference. First operand 5282 states and 7163 transitions. Second operand 13 states.