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_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:08:35,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:08:35,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:08:36,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:08:36,073 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 21:08:36,098 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:08:36,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:08:36,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:08:36,100 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:08:36,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:08:36,101 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:08:36,101 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:08:36,101 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:08:36,101 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:08:36,101 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:08:36,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:08:36,104 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:08:36,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:08:36,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:08:36,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:08:36,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:08:36,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:08:36,105 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:08:36,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:08:36,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:08:36,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:08:36,106 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:08:36,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:08:36,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:08:36,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:08:36,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:08:36,108 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:08:36,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:08:36,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:08:36,108 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:08:36,161 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:08:36,178 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:08:36,182 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:08:36,183 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:08:36,184 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:08:36,187 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label21.c [2019-09-09 21:08:36,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c480efd3/4ffae48e254c4ecd8b49173809bc0cbd/FLAGcccb2672f [2019-09-09 21:08:36,925 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:08:36,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label21.c [2019-09-09 21:08:36,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c480efd3/4ffae48e254c4ecd8b49173809bc0cbd/FLAGcccb2672f [2019-09-09 21:08:37,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c480efd3/4ffae48e254c4ecd8b49173809bc0cbd [2019-09-09 21:08:37,110 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:08:37,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:08:37,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:08:37,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:08:37,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:08:37,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:08:37" (1/1) ... [2019-09-09 21:08:37,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f3c391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:37, skipping insertion in model container [2019-09-09 21:08:37,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:08:37" (1/1) ... [2019-09-09 21:08:37,128 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:08:37,221 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:08:38,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:08:38,317 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:08:38,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:08:38,853 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:08:38,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38 WrapperNode [2019-09-09 21:08:38,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:08:38,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:08:38,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:08:38,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:08:38,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38" (1/1) ... [2019-09-09 21:08:38,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38" (1/1) ... [2019-09-09 21:08:38,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38" (1/1) ... [2019-09-09 21:08:38,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38" (1/1) ... [2019-09-09 21:08:39,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38" (1/1) ... [2019-09-09 21:08:39,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38" (1/1) ... [2019-09-09 21:08:39,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38" (1/1) ... [2019-09-09 21:08:39,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:08:39,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:08:39,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:08:39,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:08:39,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38" (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 21:08:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:08:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:08:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:08:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:08:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:08:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:08:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:08:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:08:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:08:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:08:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:08:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:08:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:08:43,153 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:08:43,154 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:08:43,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:08:43 BoogieIcfgContainer [2019-09-09 21:08:43,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:08:43,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:08:43,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:08:43,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:08:43,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:08:37" (1/3) ... [2019-09-09 21:08:43,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624ff964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:08:43, skipping insertion in model container [2019-09-09 21:08:43,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:08:38" (2/3) ... [2019-09-09 21:08:43,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@624ff964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:08:43, skipping insertion in model container [2019-09-09 21:08:43,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:08:43" (3/3) ... [2019-09-09 21:08:43,164 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label21.c [2019-09-09 21:08:43,174 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:08:43,185 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:08:43,203 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:08:43,235 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:08:43,236 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:08:43,236 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:08:43,236 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:08:43,236 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:08:43,236 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:08:43,236 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:08:43,237 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:08:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:08:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-09 21:08:43,298 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:08:43,299 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] [2019-09-09 21:08:43,301 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:08:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:08:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1940897135, now seen corresponding path program 1 times [2019-09-09 21:08:43,310 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:08:43,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:43,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:08:43,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:43,358 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:08:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:08:43,695 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 21:08:43,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:08:43,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:08:43,698 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:08:43,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:08:43,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:08:43,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:08:43,721 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:08:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:08:49,979 INFO L93 Difference]: Finished difference Result 1565 states and 2620 transitions. [2019-09-09 21:08:49,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:08:49,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2019-09-09 21:08:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:08:50,016 INFO L225 Difference]: With dead ends: 1565 [2019-09-09 21:08:50,017 INFO L226 Difference]: Without dead ends: 1478 [2019-09-09 21:08:50,019 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 21:08:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2019-09-09 21:08:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2019-09-09 21:08:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2019-09-09 21:08:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1697 transitions. [2019-09-09 21:08:50,141 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1697 transitions. Word has length 65 [2019-09-09 21:08:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:08:50,143 INFO L475 AbstractCegarLoop]: Abstraction has 1006 states and 1697 transitions. [2019-09-09 21:08:50,144 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:08:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1697 transitions. [2019-09-09 21:08:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-09 21:08:50,155 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:08:50,155 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, 1, 1, 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 21:08:50,156 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:08:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:08:50,156 INFO L82 PathProgramCache]: Analyzing trace with hash -263344465, now seen corresponding path program 1 times [2019-09-09 21:08:50,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:08:50,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:50,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:08:50,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:50,158 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:08:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:08:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:08:50,407 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:08:50,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:08:50,407 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:08:50,409 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:08:50,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:08:50,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:08:50,410 INFO L87 Difference]: Start difference. First operand 1006 states and 1697 transitions. Second operand 6 states. [2019-09-09 21:08:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:08:55,413 INFO L93 Difference]: Finished difference Result 1931 states and 2979 transitions. [2019-09-09 21:08:55,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:08:55,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-09-09 21:08:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:08:55,428 INFO L225 Difference]: With dead ends: 1931 [2019-09-09 21:08:55,429 INFO L226 Difference]: Without dead ends: 1931 [2019-09-09 21:08:55,430 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 21:08:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2019-09-09 21:08:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1911. [2019-09-09 21:08:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1911 states. [2019-09-09 21:08:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2935 transitions. [2019-09-09 21:08:55,524 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2935 transitions. Word has length 140 [2019-09-09 21:08:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:08:55,527 INFO L475 AbstractCegarLoop]: Abstraction has 1911 states and 2935 transitions. [2019-09-09 21:08:55,527 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:08:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2935 transitions. [2019-09-09 21:08:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-09-09 21:08:55,542 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:08:55,542 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, 1, 1, 1, 1, 1, 1, 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 21:08:55,543 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:08:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:08:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash -462261193, now seen corresponding path program 1 times [2019-09-09 21:08:55,544 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:08:55,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:55,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:08:55,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:08:55,547 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:08:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:08:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:08:55,741 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:08:55,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:08:55,741 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:08:55,742 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:08:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:08:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:08:55,743 INFO L87 Difference]: Start difference. First operand 1911 states and 2935 transitions. Second operand 6 states. [2019-09-09 21:09:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:09:00,121 INFO L93 Difference]: Finished difference Result 2841 states and 3676 transitions. [2019-09-09 21:09:00,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:09:00,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-09-09 21:09:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:09:00,139 INFO L225 Difference]: With dead ends: 2841 [2019-09-09 21:09:00,140 INFO L226 Difference]: Without dead ends: 2841 [2019-09-09 21:09:00,143 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 21:09:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2019-09-09 21:09:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2819. [2019-09-09 21:09:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-09-09 21:09:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3606 transitions. [2019-09-09 21:09:00,216 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3606 transitions. Word has length 144 [2019-09-09 21:09:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:09:00,217 INFO L475 AbstractCegarLoop]: Abstraction has 2819 states and 3606 transitions. [2019-09-09 21:09:00,217 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:09:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3606 transitions. [2019-09-09 21:09:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-09-09 21:09:00,219 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:09:00,220 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:00,220 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:09:00,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:09:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1443737402, now seen corresponding path program 1 times [2019-09-09 21:09:00,221 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:09:00,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:00,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:09:00,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:00,222 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:09:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:09:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:09:00,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:09:00,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:09:00,340 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:09:00,341 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:09:00,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:09:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:09:00,342 INFO L87 Difference]: Start difference. First operand 2819 states and 3606 transitions. Second operand 4 states. [2019-09-09 21:09:04,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:09:04,359 INFO L93 Difference]: Finished difference Result 2819 states and 3569 transitions. [2019-09-09 21:09:04,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:09:04,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-09-09 21:09:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:09:04,375 INFO L225 Difference]: With dead ends: 2819 [2019-09-09 21:09:04,376 INFO L226 Difference]: Without dead ends: 2819 [2019-09-09 21:09:04,376 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 21:09:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2019-09-09 21:09:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2819. [2019-09-09 21:09:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-09-09 21:09:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3569 transitions. [2019-09-09 21:09:04,454 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3569 transitions. Word has length 174 [2019-09-09 21:09:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:09:04,456 INFO L475 AbstractCegarLoop]: Abstraction has 2819 states and 3569 transitions. [2019-09-09 21:09:04,456 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:09:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3569 transitions. [2019-09-09 21:09:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-09-09 21:09:04,460 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:09:04,461 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, 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, 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 21:09:04,461 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:09:04,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:09:04,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1713540935, now seen corresponding path program 1 times [2019-09-09 21:09:04,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:09:04,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:04,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:09:04,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:04,463 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:09:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:09:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-09 21:09:04,659 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:09:04,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:09:04,659 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:09:04,660 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:09:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:09:04,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:09:04,662 INFO L87 Difference]: Start difference. First operand 2819 states and 3569 transitions. Second operand 4 states. [2019-09-09 21:09:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:09:11,336 INFO L93 Difference]: Finished difference Result 8104 states and 9650 transitions. [2019-09-09 21:09:11,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:09:11,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 227 [2019-09-09 21:09:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:09:11,373 INFO L225 Difference]: With dead ends: 8104 [2019-09-09 21:09:11,373 INFO L226 Difference]: Without dead ends: 8104 [2019-09-09 21:09:11,374 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 21:09:11,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8104 states. [2019-09-09 21:09:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8104 to 7228. [2019-09-09 21:09:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7228 states. [2019-09-09 21:09:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7228 states to 7228 states and 8718 transitions. [2019-09-09 21:09:11,584 INFO L78 Accepts]: Start accepts. Automaton has 7228 states and 8718 transitions. Word has length 227 [2019-09-09 21:09:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:09:11,585 INFO L475 AbstractCegarLoop]: Abstraction has 7228 states and 8718 transitions. [2019-09-09 21:09:11,585 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:09:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 7228 states and 8718 transitions. [2019-09-09 21:09:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-09-09 21:09:11,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:09:11,591 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:11,592 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:09:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:09:11,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1604905498, now seen corresponding path program 1 times [2019-09-09 21:09:11,593 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:09:11,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:11,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:09:11,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:09:11,598 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:09:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:09:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 135 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:09:11,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:09:11,906 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:09:11,908 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 251 with the following transitions: [2019-09-09 21:09:11,911 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1118], [1126], [1134], [1138], [1140], [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 21:09:11,995 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:09:11,995 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:09:19,311 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:09:19,313 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 21:09:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:09:19,317 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:09:26,448 INFO L227 lantSequenceWeakener]: Weakened 231 states. On average, predicates are now at 75.96% of their original sizes. [2019-09-09 21:09:26,448 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:09:26,539 INFO L420 sIntCurrentIteration]: We unified 249 AI predicates to 249 [2019-09-09 21:09:26,539 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:09:26,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:09:26,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 21:09:26,541 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:09:26,541 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 21:09:26,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 21:09:26,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 21:09:26,542 INFO L87 Difference]: Start difference. First operand 7228 states and 8718 transitions. Second operand 11 states. [2019-09-09 21:09:43,358 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.