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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:08:35,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:08:35,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:08:35,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:08:35,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:08:35,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:08:35,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:08:35,243 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 21:08:35,257 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:08:35,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:08:35,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:08:35,258 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:08:35,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:08:35,259 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:08:35,259 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:08:35,260 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:08:35,260 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:08:35,260 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:08:35,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:08:35,261 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:08:35,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:08:35,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:08:35,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:08:35,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:08:35,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:08:35,262 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:08:35,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:08:35,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:08:35,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:08:35,263 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:08:35,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:08:35,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:08:35,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:08:35,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:08:35,264 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:08:35,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:08:35,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:08:35,265 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:08:35,293 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:08:35,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:08:35,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:08:35,311 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:08:35,312 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:08:35,312 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label20.c [2019-09-09 21:08:35,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bf98412/f663272cf1834c30b162b16d444f031b/FLAG13394ad09 [2019-09-09 21:08:36,122 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:08:36,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label20.c [2019-09-09 21:08:36,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bf98412/f663272cf1834c30b162b16d444f031b/FLAG13394ad09 [2019-09-09 21:08:36,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bf98412/f663272cf1834c30b162b16d444f031b [2019-09-09 21:08:36,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:08:36,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:08:36,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:08:36,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:08:36,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:08:36,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:08:36" (1/1) ... [2019-09-09 21:08:36,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335c662c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:36, skipping insertion in model container [2019-09-09 21:08:36,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:08:36" (1/1) ... [2019-09-09 21:08:36,231 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:08:36,338 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:08:37,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:08:37,409 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:08:37,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:08:37,910 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:08:37,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37 WrapperNode [2019-09-09 21:08:37,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:08:37,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:08:37,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:08:37,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:08:37,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37" (1/1) ... [2019-09-09 21:08:37,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37" (1/1) ... [2019-09-09 21:08:38,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37" (1/1) ... [2019-09-09 21:08:38,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37" (1/1) ... [2019-09-09 21:08:38,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37" (1/1) ... [2019-09-09 21:08:38,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37" (1/1) ... [2019-09-09 21:08:38,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37" (1/1) ... [2019-09-09 21:08:38,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:08:38,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:08:38,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:08:38,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:08:38,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37" (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 21:08:38,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:08:38,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:08:38,316 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:08:38,317 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:08:38,317 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:08:38,317 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:08:38,317 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:08:38,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:08:38,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:08:38,318 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:08:38,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:08:38,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:08:38,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:08:42,270 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:08:42,270 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:08:42,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:08:42 BoogieIcfgContainer [2019-09-09 21:08:42,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:08:42,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:08:42,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:08:42,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:08:42,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:08:36" (1/3) ... [2019-09-09 21:08:42,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc9828d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:08:42, skipping insertion in model container [2019-09-09 21:08:42,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37" (2/3) ... [2019-09-09 21:08:42,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc9828d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:08:42, skipping insertion in model container [2019-09-09 21:08:42,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:08:42" (3/3) ... [2019-09-09 21:08:42,281 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label20.c [2019-09-09 21:08:42,291 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:08:42,300 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:08:42,318 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:08:42,345 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:08:42,346 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:08:42,346 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:08:42,346 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:08:42,346 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:08:42,346 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:08:42,346 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:08:42,347 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:08:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:08:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-09 21:08:42,387 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:08:42,389 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] [2019-09-09 21:08:42,390 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:08:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:08:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1354524993, now seen corresponding path program 1 times [2019-09-09 21:08:42,399 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:08:42,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:42,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:08:42,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:42,440 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:08:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:08:42,669 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 21:08:42,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:08:42,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:08:42,671 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:08:42,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:08:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:08:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:08:42,695 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:08:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:08:48,946 INFO L93 Difference]: Finished difference Result 1536 states and 2305 transitions. [2019-09-09 21:08:48,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:08:48,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-09-09 21:08:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:08:48,983 INFO L225 Difference]: With dead ends: 1536 [2019-09-09 21:08:48,984 INFO L226 Difference]: Without dead ends: 1451 [2019-09-09 21:08:48,985 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 21:08:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2019-09-09 21:08:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1437. [2019-09-09 21:08:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1437 states. [2019-09-09 21:08:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2166 transitions. [2019-09-09 21:08:49,117 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2166 transitions. Word has length 32 [2019-09-09 21:08:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:08:49,117 INFO L475 AbstractCegarLoop]: Abstraction has 1437 states and 2166 transitions. [2019-09-09 21:08:49,117 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:08:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2166 transitions. [2019-09-09 21:08:49,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-09 21:08:49,123 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:08:49,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:49,124 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:08:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:08:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1522428140, now seen corresponding path program 1 times [2019-09-09 21:08:49,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:08:49,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:49,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:08:49,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:49,129 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:08:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:08:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:08:49,302 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:08:49,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 21:08:49,303 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:08:49,307 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 21:08:49,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 21:08:49,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 21:08:49,308 INFO L87 Difference]: Start difference. First operand 1437 states and 2166 transitions. Second operand 5 states. [2019-09-09 21:08:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:08:54,018 INFO L93 Difference]: Finished difference Result 2824 states and 4003 transitions. [2019-09-09 21:08:54,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:08:54,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-09-09 21:08:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:08:54,035 INFO L225 Difference]: With dead ends: 2824 [2019-09-09 21:08:54,036 INFO L226 Difference]: Without dead ends: 2824 [2019-09-09 21:08:54,037 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 21:08:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2019-09-09 21:08:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2794. [2019-09-09 21:08:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2794 states. [2019-09-09 21:08:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 3921 transitions. [2019-09-09 21:08:54,129 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 3921 transitions. Word has length 103 [2019-09-09 21:08:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:08:54,130 INFO L475 AbstractCegarLoop]: Abstraction has 2794 states and 3921 transitions. [2019-09-09 21:08:54,130 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 21:08:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 3921 transitions. [2019-09-09 21:08:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-09 21:08:54,133 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:08:54,133 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:54,134 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:08:54,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:08:54,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1448831800, now seen corresponding path program 1 times [2019-09-09 21:08:54,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:08:54,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:54,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:08:54,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:54,136 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:08:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:08:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:08:54,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:08:54,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 21:08:54,347 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:08:54,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 21:08:54,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 21:08:54,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 21:08:54,349 INFO L87 Difference]: Start difference. First operand 2794 states and 3921 transitions. Second operand 3 states. [2019-09-09 21:08:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:08:57,452 INFO L93 Difference]: Finished difference Result 3683 states and 5057 transitions. [2019-09-09 21:08:57,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 21:08:57,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2019-09-09 21:08:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:08:57,470 INFO L225 Difference]: With dead ends: 3683 [2019-09-09 21:08:57,471 INFO L226 Difference]: Without dead ends: 3683 [2019-09-09 21:08:57,471 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 21:08:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2019-09-09 21:08:57,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 3681. [2019-09-09 21:08:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3681 states. [2019-09-09 21:08:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 5053 transitions. [2019-09-09 21:08:57,559 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 5053 transitions. Word has length 106 [2019-09-09 21:08:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:08:57,559 INFO L475 AbstractCegarLoop]: Abstraction has 3681 states and 5053 transitions. [2019-09-09 21:08:57,560 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 21:08:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 5053 transitions. [2019-09-09 21:08:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-09 21:08:57,565 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:08:57,566 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:57,566 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:08:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:08:57,566 INFO L82 PathProgramCache]: Analyzing trace with hash -179939417, now seen corresponding path program 1 times [2019-09-09 21:08:57,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:08:57,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:57,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:08:57,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:57,568 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:08:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:08:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:08:57,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:08:57,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:08:57,828 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:08:57,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:08:57,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:08:57,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:08:57,831 INFO L87 Difference]: Start difference. First operand 3681 states and 5053 transitions. Second operand 6 states. [2019-09-09 21:09:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:09:03,135 INFO L93 Difference]: Finished difference Result 5527 states and 6762 transitions. [2019-09-09 21:09:03,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:09:03,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 186 [2019-09-09 21:09:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:09:03,162 INFO L225 Difference]: With dead ends: 5527 [2019-09-09 21:09:03,162 INFO L226 Difference]: Without dead ends: 5527 [2019-09-09 21:09:03,163 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 21:09:03,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5527 states. [2019-09-09 21:09:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5527 to 5054. [2019-09-09 21:09:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5054 states. [2019-09-09 21:09:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 6165 transitions. [2019-09-09 21:09:03,284 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 6165 transitions. Word has length 186 [2019-09-09 21:09:03,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:09:03,286 INFO L475 AbstractCegarLoop]: Abstraction has 5054 states and 6165 transitions. [2019-09-09 21:09:03,286 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:09:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 6165 transitions. [2019-09-09 21:09:03,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-09 21:09:03,289 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:09:03,290 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 21:09:03,290 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:09:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:09:03,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1944797959, now seen corresponding path program 1 times [2019-09-09 21:09:03,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:09:03,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:03,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:09:03,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:03,292 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:09:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:09:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-09 21:09:03,438 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:09:03,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:09:03,439 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:09:03,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:09:03,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:09:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:09:03,441 INFO L87 Difference]: Start difference. First operand 5054 states and 6165 transitions. Second operand 4 states. [2019-09-09 21:09:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:09:08,543 INFO L93 Difference]: Finished difference Result 13421 states and 15800 transitions. [2019-09-09 21:09:08,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:09:08,547 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 194 [2019-09-09 21:09:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:09:08,601 INFO L225 Difference]: With dead ends: 13421 [2019-09-09 21:09:08,602 INFO L226 Difference]: Without dead ends: 13421 [2019-09-09 21:09:08,602 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:09:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2019-09-09 21:09:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 11678. [2019-09-09 21:09:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11678 states. [2019-09-09 21:09:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11678 states to 11678 states and 13961 transitions. [2019-09-09 21:09:08,853 INFO L78 Accepts]: Start accepts. Automaton has 11678 states and 13961 transitions. Word has length 194 [2019-09-09 21:09:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:09:08,854 INFO L475 AbstractCegarLoop]: Abstraction has 11678 states and 13961 transitions. [2019-09-09 21:09:08,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:09:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 11678 states and 13961 transitions. [2019-09-09 21:09:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-09-09 21:09:08,858 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:09:08,859 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 21:09:08,859 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:09:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:09:08,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1960120748, now seen corresponding path program 1 times [2019-09-09 21:09:08,860 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:09:08,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:08,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:09:08,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:08,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:09:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:09:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 102 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:09:09,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:09:09,097 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:09:09,098 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2019-09-09 21:09:09,100 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], [874], [876], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [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], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:09:09,189 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:09:09,189 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:09:16,230 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:09:16,232 INFO L272 AbstractInterpreter]: Visited 114 different actions 114 times. Never merged. Never widened. Performed 250 root evaluator evaluations with a maximum evaluation depth of 15. Performed 250 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 21:09:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:09:16,236 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:09:22,591 INFO L227 lantSequenceWeakener]: Weakened 198 states. On average, predicates are now at 75.43% of their original sizes. [2019-09-09 21:09:22,591 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:09:22,673 INFO L420 sIntCurrentIteration]: We unified 216 AI predicates to 216 [2019-09-09 21:09:22,673 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:09:22,675 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:09:22,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 21:09:22,675 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:09:22,676 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 21:09:22,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 21:09:22,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 21:09:22,677 INFO L87 Difference]: Start difference. First operand 11678 states and 13961 transitions. Second operand 11 states. [2019-09-09 21:09:33,646 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.