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/Problem17_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:05:22,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:05:22,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:05:22,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:05:22,353 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 21:05:22,369 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:05:22,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:05:22,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:05:22,370 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:05:22,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:05:22,371 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:05:22,371 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:05:22,372 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:05:22,372 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:05:22,372 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:05:22,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:05:22,373 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:05:22,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:05:22,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:05:22,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:05:22,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:05:22,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:05:22,374 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:05:22,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:05:22,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:05:22,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:05:22,375 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:05:22,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:05:22,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:05:22,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:05:22,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:05:22,376 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:05:22,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:05:22,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:05:22,377 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:05:22,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:05:22,437 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:05:22,442 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:05:22,444 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:05:22,444 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:05:22,445 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label17.c [2019-09-09 21:05:22,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7f4395d9/29f6d236bd794892a351f007e16a83e9/FLAG53a6d3b1f [2019-09-09 21:05:23,347 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:05:23,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label17.c [2019-09-09 21:05:23,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7f4395d9/29f6d236bd794892a351f007e16a83e9/FLAG53a6d3b1f [2019-09-09 21:05:23,432 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7f4395d9/29f6d236bd794892a351f007e16a83e9 [2019-09-09 21:05:23,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:05:23,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:05:23,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:05:23,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:05:23,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:05:23,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:05:23" (1/1) ... [2019-09-09 21:05:23,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa60c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:23, skipping insertion in model container [2019-09-09 21:05:23,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:05:23" (1/1) ... [2019-09-09 21:05:23,470 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:05:23,587 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:05:24,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:05:24,707 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:05:25,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:05:25,293 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:05:25,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25 WrapperNode [2019-09-09 21:05:25,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:05:25,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:05:25,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:05:25,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:05:25,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25" (1/1) ... [2019-09-09 21:05:25,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25" (1/1) ... [2019-09-09 21:05:25,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25" (1/1) ... [2019-09-09 21:05:25,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25" (1/1) ... [2019-09-09 21:05:25,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25" (1/1) ... [2019-09-09 21:05:25,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25" (1/1) ... [2019-09-09 21:05:25,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25" (1/1) ... [2019-09-09 21:05:25,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:05:25,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:05:25,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:05:25,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:05:25,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25" (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 21:05:25,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:05:25,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:05:25,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:05:25,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:05:25,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:05:25,692 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:05:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:05:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:05:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:05:25,693 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:05:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:05:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:05:25,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:05:29,774 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:05:29,774 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:05:29,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:05:29 BoogieIcfgContainer [2019-09-09 21:05:29,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:05:29,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:05:29,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:05:29,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:05:29,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:05:23" (1/3) ... [2019-09-09 21:05:29,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9cbe8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:05:29, skipping insertion in model container [2019-09-09 21:05:29,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:05:25" (2/3) ... [2019-09-09 21:05:29,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9cbe8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:05:29, skipping insertion in model container [2019-09-09 21:05:29,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:05:29" (3/3) ... [2019-09-09 21:05:29,787 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label17.c [2019-09-09 21:05:29,797 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:05:29,808 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:05:29,826 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:05:29,856 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:05:29,856 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:05:29,856 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:05:29,856 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:05:29,857 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:05:29,857 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:05:29,857 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:05:29,857 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:05:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:05:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-09 21:05:29,912 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:05:29,913 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] [2019-09-09 21:05:29,915 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:05:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:05:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash 14902641, now seen corresponding path program 1 times [2019-09-09 21:05:29,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:05:29,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:05:29,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:05:29,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:05:29,960 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:05:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:05:30,274 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 21:05:30,276 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:05:30,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:05:30,277 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:05:30,283 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:05:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:05:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:05:30,301 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:05:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:05:37,387 INFO L93 Difference]: Finished difference Result 1532 states and 2236 transitions. [2019-09-09 21:05:37,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:05:37,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2019-09-09 21:05:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:05:37,424 INFO L225 Difference]: With dead ends: 1532 [2019-09-09 21:05:37,424 INFO L226 Difference]: Without dead ends: 1447 [2019-09-09 21:05:37,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 21:05:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2019-09-09 21:05:37,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1440. [2019-09-09 21:05:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2019-09-09 21:05:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2109 transitions. [2019-09-09 21:05:37,585 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2109 transitions. Word has length 44 [2019-09-09 21:05:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:05:37,586 INFO L475 AbstractCegarLoop]: Abstraction has 1440 states and 2109 transitions. [2019-09-09 21:05:37,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:05:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2109 transitions. [2019-09-09 21:05:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-09 21:05:37,592 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:05:37,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:37,593 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:05:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:05:37,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1735541800, now seen corresponding path program 1 times [2019-09-09 21:05:37,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:05:37,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:05:37,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:05:37,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:05:37,596 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:05:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:05:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:05:37,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:05:37,931 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:05:37,932 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 119 with the following transitions: [2019-09-09 21:05:37,934 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [970], [972], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:05:37,990 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:05:37,990 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:05:41,476 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 21:05:43,186 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:05:43,188 INFO L272 AbstractInterpreter]: Visited 81 different actions 157 times. Merged at 4 different actions 5 times. Never widened. Performed 373 root evaluator evaluations with a maximum evaluation depth of 15. Performed 373 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 21:05:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:05:43,193 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:05:44,852 INFO L227 lantSequenceWeakener]: Weakened 115 states. On average, predicates are now at 75.76% of their original sizes. [2019-09-09 21:05:44,853 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:05:44,961 INFO L420 sIntCurrentIteration]: We unified 117 AI predicates to 117 [2019-09-09 21:05:44,961 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:05:44,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:05:44,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 21:05:44,962 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:05:44,964 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 21:05:44,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 21:05:44,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 21:05:44,965 INFO L87 Difference]: Start difference. First operand 1440 states and 2109 transitions. Second operand 11 states.