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_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:02:14,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:02:14,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:02:14,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 15:02:14,353 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 15:02:14,369 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:02:14,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:02:14,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:02:14,370 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:02:14,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:02:14,371 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:02:14,371 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:02:14,371 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:02:14,371 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:02:14,371 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:02:14,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:02:14,373 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:02:14,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:02:14,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:02:14,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:02:14,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:02:14,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:02:14,374 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:02:14,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:02:14,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:02:14,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:02:14,375 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:02:14,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:02:14,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:02:14,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:02:14,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:02:14,376 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:02:14,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:02:14,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:02:14,377 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:02:14,429 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:02:14,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:02:14,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:02:14,447 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:02:14,450 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:02:14,451 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-09-09 15:02:14,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37bace988/64ca776085ea46b1be95e90e8692c61e/FLAGcd2d05219 [2019-09-09 15:02:15,200 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:02:15,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-09-09 15:02:15,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37bace988/64ca776085ea46b1be95e90e8692c61e/FLAGcd2d05219 [2019-09-09 15:02:15,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37bace988/64ca776085ea46b1be95e90e8692c61e [2019-09-09 15:02:15,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:02:15,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:02:15,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:02:15,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:02:15,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:02:15,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:02:15" (1/1) ... [2019-09-09 15:02:15,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab5b6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:15, skipping insertion in model container [2019-09-09 15:02:15,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:02:15" (1/1) ... [2019-09-09 15:02:15,411 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:02:15,472 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:02:16,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:02:16,110 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:02:16,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:02:16,361 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:02:16,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16 WrapperNode [2019-09-09 15:02:16,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:02:16,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:02:16,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:02:16,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:02:16,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16" (1/1) ... [2019-09-09 15:02:16,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16" (1/1) ... [2019-09-09 15:02:16,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16" (1/1) ... [2019-09-09 15:02:16,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16" (1/1) ... [2019-09-09 15:02:16,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16" (1/1) ... [2019-09-09 15:02:16,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16" (1/1) ... [2019-09-09 15:02:16,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16" (1/1) ... [2019-09-09 15:02:16,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:02:16,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:02:16,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:02:16,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:02:16,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16" (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 15:02:16,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:02:16,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:02:16,641 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:02:16,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:02:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:02:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:02:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:02:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:02:16,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:02:16,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:02:16,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:02:18,434 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:02:18,435 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:02:18,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:02:18 BoogieIcfgContainer [2019-09-09 15:02:18,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:02:18,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:02:18,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:02:18,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:02:18,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:02:15" (1/3) ... [2019-09-09 15:02:18,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ae6244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:02:18, skipping insertion in model container [2019-09-09 15:02:18,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:02:16" (2/3) ... [2019-09-09 15:02:18,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ae6244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:02:18, skipping insertion in model container [2019-09-09 15:02:18,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:02:18" (3/3) ... [2019-09-09 15:02:18,452 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label09.c [2019-09-09 15:02:18,466 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:02:18,478 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:02:18,501 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:02:18,542 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:02:18,544 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:02:18,544 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:02:18,544 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:02:18,544 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:02:18,545 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:02:18,545 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:02:18,545 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:02:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-09-09 15:02:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-09 15:02:18,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:02:18,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:02:18,622 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:02:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:02:18,627 INFO L82 PathProgramCache]: Analyzing trace with hash -869319573, now seen corresponding path program 1 times [2019-09-09 15:02:18,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:02:18,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:02:18,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:02:18,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:02:18,673 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:02:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:02:19,019 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 15:02:19,022 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:02:19,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 15:02:19,022 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:02:19,028 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 15:02:19,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 15:02:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 15:02:19,047 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-09-09 15:02:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:02:21,241 INFO L93 Difference]: Finished difference Result 695 states and 994 transitions. [2019-09-09 15:02:21,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 15:02:21,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-09-09 15:02:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:02:21,269 INFO L225 Difference]: With dead ends: 695 [2019-09-09 15:02:21,269 INFO L226 Difference]: Without dead ends: 622 [2019-09-09 15:02:21,271 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 15:02:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-09-09 15:02:21,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-09-09 15:02:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-09-09 15:02:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-09-09 15:02:21,371 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 72 [2019-09-09 15:02:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:02:21,372 INFO L475 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-09-09 15:02:21,372 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 15:02:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-09-09 15:02:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-09-09 15:02:21,381 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:02:21,381 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, 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] [2019-09-09 15:02:21,381 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:02:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:02:21,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1437675110, now seen corresponding path program 1 times [2019-09-09 15:02:21,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:02:21,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:02:21,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:02:21,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:02:21,384 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:02:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:02:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:02:21,609 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:02:21,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:02:21,609 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:02:21,611 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:02:21,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:02:21,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:02:21,612 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-09-09 15:02:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:02:23,456 INFO L93 Difference]: Finished difference Result 1221 states and 1621 transitions. [2019-09-09 15:02:23,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 15:02:23,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-09-09 15:02:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:02:23,468 INFO L225 Difference]: With dead ends: 1221 [2019-09-09 15:02:23,468 INFO L226 Difference]: Without dead ends: 1221 [2019-09-09 15:02:23,469 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 15:02:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-09-09 15:02:23,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-09-09 15:02:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-09-09 15:02:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-09-09 15:02:23,542 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 152 [2019-09-09 15:02:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:02:23,543 INFO L475 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-09-09 15:02:23,544 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:02:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-09-09 15:02:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-09 15:02:23,552 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:02:23,552 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, 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] [2019-09-09 15:02:23,553 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:02:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:02:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1147537460, now seen corresponding path program 1 times [2019-09-09 15:02:23,554 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:02:23,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:02:23,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:02:23,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:02:23,555 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:02:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:02:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:02:23,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:02:23,981 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:02:23,982 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 204 with the following transitions: [2019-09-09 15:02:23,985 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], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-09-09 15:02:24,053 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:02:24,053 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:06:00,907 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 15:08:44,792 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:08:44,796 INFO L272 AbstractInterpreter]: Visited 138 different actions 271 times. Merged at 4 different actions 5 times. Never widened. Performed 651 root evaluator evaluations with a maximum evaluation depth of 17. Performed 651 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 15:08:44,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:08:44,801 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:11:08,040 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 74.01% of their original sizes. [2019-09-09 15:11:08,041 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:11:08,166 INFO L420 sIntCurrentIteration]: We unified 202 AI predicates to 202 [2019-09-09 15:11:08,166 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:11:08,167 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:11:08,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2019-09-09 15:11:08,168 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:11:08,169 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-09 15:11:08,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-09 15:11:08,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-09-09 15:11:08,170 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 13 states.