java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:33:01,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:33:01,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:33:01,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 14:33:01,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 14:33:01,465 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:33:01,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:33:01,466 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:33:01,466 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:33:01,467 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:33:01,467 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:33:01,467 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:33:01,467 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:33:01,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:33:01,467 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:33:01,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:33:01,468 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:33:01,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:33:01,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:33:01,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:33:01,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:33:01,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:33:01,470 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:33:01,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:33:01,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:33:01,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:33:01,470 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:33:01,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:33:01,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:33:01,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:33:01,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:33:01,471 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:33:01,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:33:01,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:33:01,472 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:33:01,500 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:33:01,513 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:33:01,517 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:33:01,518 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:33:01,519 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:33:01,519 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label38.c [2019-09-09 14:33:01,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef134d13b/d38cca3ca8f8433ebb88f151927f59f6/FLAG94dc6887d [2019-09-09 14:33:02,123 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:33:02,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label38.c [2019-09-09 14:33:02,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef134d13b/d38cca3ca8f8433ebb88f151927f59f6/FLAG94dc6887d [2019-09-09 14:33:02,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef134d13b/d38cca3ca8f8433ebb88f151927f59f6 [2019-09-09 14:33:02,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:33:02,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:33:02,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:33:02,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:33:02,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:33:02,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:33:02" (1/1) ... [2019-09-09 14:33:02,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f22801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:02, skipping insertion in model container [2019-09-09 14:33:02,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:33:02" (1/1) ... [2019-09-09 14:33:02,389 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:33:02,442 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:33:03,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:33:03,101 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:33:03,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:33:03,204 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:33:03,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03 WrapperNode [2019-09-09 14:33:03,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:33:03,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:33:03,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:33:03,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:33:03,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03" (1/1) ... [2019-09-09 14:33:03,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03" (1/1) ... [2019-09-09 14:33:03,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03" (1/1) ... [2019-09-09 14:33:03,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03" (1/1) ... [2019-09-09 14:33:03,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03" (1/1) ... [2019-09-09 14:33:03,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03" (1/1) ... [2019-09-09 14:33:03,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03" (1/1) ... [2019-09-09 14:33:03,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:33:03,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:33:03,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:33:03,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:33:03,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:33:03,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:33:03,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:33:03,418 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:33:03,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:33:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:33:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:33:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:33:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:33:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:33:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:33:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:33:04,798 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:33:04,799 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:33:04,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:33:04 BoogieIcfgContainer [2019-09-09 14:33:04,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:33:04,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:33:04,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:33:04,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:33:04,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:33:02" (1/3) ... [2019-09-09 14:33:04,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e09950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:33:04, skipping insertion in model container [2019-09-09 14:33:04,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:33:03" (2/3) ... [2019-09-09 14:33:04,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e09950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:33:04, skipping insertion in model container [2019-09-09 14:33:04,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:33:04" (3/3) ... [2019-09-09 14:33:04,811 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label38.c [2019-09-09 14:33:04,822 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:33:04,832 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:33:04,851 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:33:04,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:33:04,879 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:33:04,879 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:33:04,880 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:33:04,880 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:33:04,880 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:33:04,880 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:33:04,880 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:33:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:33:04,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-09 14:33:04,916 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:33:04,917 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] [2019-09-09 14:33:04,919 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:33:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:33:04,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1813043417, now seen corresponding path program 1 times [2019-09-09 14:33:04,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:33:04,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:33:04,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:33:04,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:33:04,984 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:33:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:33:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:33:05,207 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:33:05,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 14:33:05,208 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:33:05,214 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 14:33:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 14:33:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 14:33:05,233 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-09-09 14:33:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:33:06,272 INFO L93 Difference]: Finished difference Result 362 states and 553 transitions. [2019-09-09 14:33:06,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 14:33:06,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-09-09 14:33:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:33:06,298 INFO L225 Difference]: With dead ends: 362 [2019-09-09 14:33:06,299 INFO L226 Difference]: Without dead ends: 294 [2019-09-09 14:33:06,302 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 14:33:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-09-09 14:33:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-09-09 14:33:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-09-09 14:33:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 436 transitions. [2019-09-09 14:33:06,403 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 436 transitions. Word has length 38 [2019-09-09 14:33:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:33:06,403 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 436 transitions. [2019-09-09 14:33:06,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 14:33:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 436 transitions. [2019-09-09 14:33:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-09 14:33:06,409 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:33:06,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:33:06,410 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:33:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:33:06,411 INFO L82 PathProgramCache]: Analyzing trace with hash -32611371, now seen corresponding path program 1 times [2019-09-09 14:33:06,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:33:06,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:33:06,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:33:06,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:33:06,413 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:33:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:33:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 14:33:06,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:33:06,645 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:33:06,646 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 126 with the following transitions: [2019-09-09 14:33:06,648 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], [213], [215], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:33:06,699 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:33:06,699 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:33:23,737 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:33:23,740 INFO L272 AbstractInterpreter]: Visited 91 different actions 91 times. Never merged. Never widened. Performed 128 root evaluator evaluations with a maximum evaluation depth of 16. Performed 128 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 14:33:23,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:33:23,745 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:33:36,633 INFO L227 lantSequenceWeakener]: Weakened 119 states. On average, predicates are now at 73.24% of their original sizes. [2019-09-09 14:33:36,634 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:33:36,689 INFO L420 sIntCurrentIteration]: We unified 124 AI predicates to 124 [2019-09-09 14:33:36,689 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:33:36,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:33:36,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-09-09 14:33:36,690 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:33:36,692 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 14:33:36,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 14:33:36,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 14:33:36,693 INFO L87 Difference]: Start difference. First operand 294 states and 436 transitions. Second operand 7 states. [2019-09-09 14:33:41,351 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:36:13,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:36:13,582 INFO L93 Difference]: Finished difference Result 438 states and 586 transitions. [2019-09-09 14:36:13,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:36:13,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 125 [2019-09-09 14:36:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:36:13,587 INFO L225 Difference]: With dead ends: 438 [2019-09-09 14:36:13,587 INFO L226 Difference]: Without dead ends: 438 [2019-09-09 14:36:13,588 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-09-09 14:36:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-09-09 14:36:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2019-09-09 14:36:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-09-09 14:36:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 585 transitions. [2019-09-09 14:36:13,636 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 585 transitions. Word has length 125 [2019-09-09 14:36:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:36:13,637 INFO L475 AbstractCegarLoop]: Abstraction has 437 states and 585 transitions. [2019-09-09 14:36:13,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 14:36:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 585 transitions. [2019-09-09 14:36:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-09-09 14:36:13,642 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:36:13,642 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:36:13,643 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:36:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:36:13,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1837442610, now seen corresponding path program 1 times [2019-09-09 14:36:13,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:36:13,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:36:13,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:36:13,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:36:13,645 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:36:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:36:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-09-09 14:36:13,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:36:13,926 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:36:13,927 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 196 with the following transitions: [2019-09-09 14:36:13,927 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], [213], [215], [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], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:36:13,933 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:36:13,933 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:36:16,712 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:36:58,457 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:36:58,459 INFO L272 AbstractInterpreter]: Visited 95 different actions 184 times. Merged at 4 different actions 4 times. Never widened. Performed 380 root evaluator evaluations with a maximum evaluation depth of 16. Performed 380 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:36:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:36:58,459 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:37:26,978 INFO L227 lantSequenceWeakener]: Weakened 192 states. On average, predicates are now at 73.11% of their original sizes. [2019-09-09 14:37:26,979 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:37:27,065 INFO L420 sIntCurrentIteration]: We unified 194 AI predicates to 194 [2019-09-09 14:37:27,066 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:37:27,066 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:37:27,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2019-09-09 14:37:27,066 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:37:27,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 14:37:27,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 14:37:27,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 14:37:27,069 INFO L87 Difference]: Start difference. First operand 437 states and 585 transitions. Second operand 10 states. [2019-09-09 14:41:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:41:54,381 INFO L93 Difference]: Finished difference Result 584 states and 744 transitions. [2019-09-09 14:41:54,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 14:41:54,381 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 195 [2019-09-09 14:41:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:41:54,386 INFO L225 Difference]: With dead ends: 584 [2019-09-09 14:41:54,386 INFO L226 Difference]: Without dead ends: 584 [2019-09-09 14:41:54,386 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-09-09 14:41:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-09-09 14:41:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2019-09-09 14:41:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-09-09 14:41:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 742 transitions. [2019-09-09 14:41:54,415 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 742 transitions. Word has length 195 [2019-09-09 14:41:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:41:54,416 INFO L475 AbstractCegarLoop]: Abstraction has 582 states and 742 transitions. [2019-09-09 14:41:54,416 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 14:41:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 742 transitions. [2019-09-09 14:41:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-09 14:41:54,420 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:41:54,420 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:41:54,421 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:41:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:41:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1990914089, now seen corresponding path program 1 times [2019-09-09 14:41:54,421 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:41:54,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:41:54,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:41:54,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:41:54,423 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:41:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:41:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-09-09 14:41:54,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:41:54,659 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:41:54,660 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 205 with the following transitions: [2019-09-09 14:41:54,662 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], [213], [215], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:41:54,673 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:41:54,674 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:42:05,806 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:42:26,118 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:42:26,118 INFO L272 AbstractInterpreter]: Visited 95 different actions 183 times. Merged at 3 different actions 3 times. Never widened. Performed 317 root evaluator evaluations with a maximum evaluation depth of 16. Performed 317 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:42:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:42:26,119 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:42:49,206 INFO L227 lantSequenceWeakener]: Weakened 201 states. On average, predicates are now at 73.09% of their original sizes. [2019-09-09 14:42:49,207 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:42:49,298 INFO L420 sIntCurrentIteration]: We unified 203 AI predicates to 203 [2019-09-09 14:42:49,298 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:42:49,299 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:42:49,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-09-09 14:42:49,299 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:42:49,300 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:42:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:42:49,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:42:49,301 INFO L87 Difference]: Start difference. First operand 582 states and 742 transitions. Second operand 11 states. [2019-09-09 14:46:02,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:46:02,559 INFO L93 Difference]: Finished difference Result 749 states and 919 transitions. [2019-09-09 14:46:02,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 14:46:02,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 204 [2019-09-09 14:46:02,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:46:02,564 INFO L225 Difference]: With dead ends: 749 [2019-09-09 14:46:02,564 INFO L226 Difference]: Without dead ends: 749 [2019-09-09 14:46:02,565 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 14:46:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2019-09-09 14:46:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 727. [2019-09-09 14:46:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2019-09-09 14:46:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 894 transitions. [2019-09-09 14:46:02,585 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 894 transitions. Word has length 204 [2019-09-09 14:46:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:46:02,586 INFO L475 AbstractCegarLoop]: Abstraction has 727 states and 894 transitions. [2019-09-09 14:46:02,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:46:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 894 transitions. [2019-09-09 14:46:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-09-09 14:46:02,590 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:46:02,591 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:46:02,591 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:46:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:46:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash 800030687, now seen corresponding path program 1 times [2019-09-09 14:46:02,592 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:46:02,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:46:02,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:46:02,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:46:02,593 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:46:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:46:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-09-09 14:46:02,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:46:02,768 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:46:02,769 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 241 with the following transitions: [2019-09-09 14:46:02,769 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], [213], [215], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:46:02,772 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:46:02,772 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:46:36,640 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.