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/Problem13_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:06:43,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:06:43,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:06:43,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:06:43,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:06:43,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:06:43,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:06:43,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:06:43,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:06:43,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:06:43,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:06:43,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:06:43,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:06:43,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:06:43,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:06:43,771 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 17:06:43,790 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:06:43,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:06:43,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:06:43,791 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:06:43,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:06:43,792 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:06:43,793 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:06:43,793 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:06:43,793 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:06:43,793 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:06:43,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:06:43,795 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:06:43,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:06:43,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:06:43,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:06:43,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:06:43,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:06:43,797 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:06:43,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:06:43,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:06:43,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:06:43,798 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:06:43,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:06:43,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:06:43,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:06:43,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:06:43,799 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:06:43,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:06:43,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:06:43,799 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:06:43,847 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:06:43,860 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:06:43,864 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:06:43,865 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:06:43,866 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:06:43,866 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label15.c [2019-09-09 17:06:43,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c1375a08/213eb54faa304c6fbe252d1b79c52117/FLAG1b70855fb [2019-09-09 17:06:44,819 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:06:44,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label15.c [2019-09-09 17:06:44,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c1375a08/213eb54faa304c6fbe252d1b79c52117/FLAG1b70855fb [2019-09-09 17:06:45,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c1375a08/213eb54faa304c6fbe252d1b79c52117 [2019-09-09 17:06:45,248 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:06:45,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:06:45,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:06:45,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:06:45,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:06:45,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:06:45" (1/1) ... [2019-09-09 17:06:45,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2231e286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:45, skipping insertion in model container [2019-09-09 17:06:45,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:06:45" (1/1) ... [2019-09-09 17:06:45,267 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:06:45,451 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:06:46,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:06:46,941 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:06:47,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:06:47,680 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:06:47,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47 WrapperNode [2019-09-09 17:06:47,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:06:47,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:06:47,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:06:47,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:06:47,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47" (1/1) ... [2019-09-09 17:06:47,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47" (1/1) ... [2019-09-09 17:06:47,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47" (1/1) ... [2019-09-09 17:06:47,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47" (1/1) ... [2019-09-09 17:06:47,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47" (1/1) ... [2019-09-09 17:06:47,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47" (1/1) ... [2019-09-09 17:06:48,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47" (1/1) ... [2019-09-09 17:06:48,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:06:48,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:06:48,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:06:48,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:06:48,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47" (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 17:06:48,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:06:48,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:06:48,112 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:06:48,112 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:06:48,113 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:06:48,113 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:06:48,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:06:48,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:06:48,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:06:48,114 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:06:48,114 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:06:48,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:06:48,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:06:48,115 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:06:48,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:06:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:06:48,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:06:54,224 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:06:54,224 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:06:54,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:06:54 BoogieIcfgContainer [2019-09-09 17:06:54,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:06:54,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:06:54,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:06:54,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:06:54,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:06:45" (1/3) ... [2019-09-09 17:06:54,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239b429d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:06:54, skipping insertion in model container [2019-09-09 17:06:54,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:06:47" (2/3) ... [2019-09-09 17:06:54,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239b429d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:06:54, skipping insertion in model container [2019-09-09 17:06:54,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:06:54" (3/3) ... [2019-09-09 17:06:54,235 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label15.c [2019-09-09 17:06:54,245 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:06:54,254 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:06:54,270 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:06:54,297 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:06:54,298 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:06:54,298 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:06:54,298 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:06:54,298 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:06:54,298 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:06:54,299 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:06:54,299 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:06:54,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:06:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-09 17:06:54,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:06:54,347 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] [2019-09-09 17:06:54,348 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:06:54,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:06:54,354 INFO L82 PathProgramCache]: Analyzing trace with hash -91190537, now seen corresponding path program 1 times [2019-09-09 17:06:54,357 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:06:54,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:06:54,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:06:54,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:06:54,407 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:06:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:06:54,703 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 17:06:54,705 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:06:54,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:06:54,706 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:06:54,711 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:06:54,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:06:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:06:54,729 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:07:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:07:01,026 INFO L93 Difference]: Finished difference Result 1981 states and 3232 transitions. [2019-09-09 17:07:01,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:07:01,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2019-09-09 17:07:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:07:01,072 INFO L225 Difference]: With dead ends: 1981 [2019-09-09 17:07:01,073 INFO L226 Difference]: Without dead ends: 1913 [2019-09-09 17:07:01,077 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 17:07:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2019-09-09 17:07:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2019-09-09 17:07:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1912 states. [2019-09-09 17:07:01,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3141 transitions. [2019-09-09 17:07:01,249 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3141 transitions. Word has length 42 [2019-09-09 17:07:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:07:01,250 INFO L475 AbstractCegarLoop]: Abstraction has 1912 states and 3141 transitions. [2019-09-09 17:07:01,250 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:07:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3141 transitions. [2019-09-09 17:07:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-09 17:07:01,255 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:07:01,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:01,256 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:07:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:07:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash 471977043, now seen corresponding path program 1 times [2019-09-09 17:07:01,257 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:07:01,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:01,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:07:01,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:01,259 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:07:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:07:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:07:01,440 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:07:01,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:07:01,440 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:07:01,442 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:07:01,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:07:01,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:07:01,443 INFO L87 Difference]: Start difference. First operand 1912 states and 3141 transitions. Second operand 5 states. [2019-09-09 17:07:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:07:10,402 INFO L93 Difference]: Finished difference Result 3681 states and 5546 transitions. [2019-09-09 17:07:10,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:07:10,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2019-09-09 17:07:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:07:10,435 INFO L225 Difference]: With dead ends: 3681 [2019-09-09 17:07:10,435 INFO L226 Difference]: Without dead ends: 3681 [2019-09-09 17:07:10,436 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 17:07:10,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2019-09-09 17:07:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3601. [2019-09-09 17:07:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3601 states. [2019-09-09 17:07:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5413 transitions. [2019-09-09 17:07:10,550 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5413 transitions. Word has length 117 [2019-09-09 17:07:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:07:10,552 INFO L475 AbstractCegarLoop]: Abstraction has 3601 states and 5413 transitions. [2019-09-09 17:07:10,552 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:07:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5413 transitions. [2019-09-09 17:07:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-09 17:07:10,557 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:07:10,557 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:10,557 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:07:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:07:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash 392796791, now seen corresponding path program 1 times [2019-09-09 17:07:10,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:07:10,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:10,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:07:10,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:10,559 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:07:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:07:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:07:10,726 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:07:10,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:07:10,726 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:07:10,729 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:07:10,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:07:10,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:07:10,730 INFO L87 Difference]: Start difference. First operand 3601 states and 5413 transitions. Second operand 5 states. [2019-09-09 17:07:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:07:20,902 INFO L93 Difference]: Finished difference Result 7306 states and 10880 transitions. [2019-09-09 17:07:20,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:07:20,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-09-09 17:07:20,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:07:20,945 INFO L225 Difference]: With dead ends: 7306 [2019-09-09 17:07:20,946 INFO L226 Difference]: Without dead ends: 7306 [2019-09-09 17:07:20,955 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 17:07:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2019-09-09 17:07:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7121. [2019-09-09 17:07:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7121 states. [2019-09-09 17:07:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 10497 transitions. [2019-09-09 17:07:21,146 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 10497 transitions. Word has length 131 [2019-09-09 17:07:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:07:21,148 INFO L475 AbstractCegarLoop]: Abstraction has 7121 states and 10497 transitions. [2019-09-09 17:07:21,149 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:07:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 10497 transitions. [2019-09-09 17:07:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-09 17:07:21,157 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:07:21,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:21,157 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:07:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:07:21,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1637015315, now seen corresponding path program 1 times [2019-09-09 17:07:21,158 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:07:21,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:21,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:07:21,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:21,160 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:07:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:07:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:07:21,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:07:21,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:07:21,389 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:07:21,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:07:21,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:07:21,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:07:21,391 INFO L87 Difference]: Start difference. First operand 7121 states and 10497 transitions. Second operand 6 states. [2019-09-09 17:07:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:07:29,344 INFO L93 Difference]: Finished difference Result 14335 states and 22345 transitions. [2019-09-09 17:07:29,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:07:29,344 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-09-09 17:07:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:07:29,428 INFO L225 Difference]: With dead ends: 14335 [2019-09-09 17:07:29,428 INFO L226 Difference]: Without dead ends: 14335 [2019-09-09 17:07:29,429 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 17:07:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14335 states. [2019-09-09 17:07:29,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14335 to 14126. [2019-09-09 17:07:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14126 states. [2019-09-09 17:07:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14126 states to 14126 states and 21305 transitions. [2019-09-09 17:07:29,810 INFO L78 Accepts]: Start accepts. Automaton has 14126 states and 21305 transitions. Word has length 149 [2019-09-09 17:07:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:07:29,811 INFO L475 AbstractCegarLoop]: Abstraction has 14126 states and 21305 transitions. [2019-09-09 17:07:29,811 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:07:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 14126 states and 21305 transitions. [2019-09-09 17:07:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-09 17:07:29,814 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:07:29,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:07:29,814 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:07:29,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:07:29,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1622849155, now seen corresponding path program 1 times [2019-09-09 17:07:29,815 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:07:29,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:29,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:07:29,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:29,816 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:07:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:07:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:07:29,925 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:07:29,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:07:29,926 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:07:29,926 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:07:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:07:29,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:07:29,927 INFO L87 Difference]: Start difference. First operand 14126 states and 21305 transitions. Second operand 4 states. [2019-09-09 17:07:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:07:38,003 INFO L93 Difference]: Finished difference Result 27519 states and 40522 transitions. [2019-09-09 17:07:38,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:07:38,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2019-09-09 17:07:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:07:38,118 INFO L225 Difference]: With dead ends: 27519 [2019-09-09 17:07:38,119 INFO L226 Difference]: Without dead ends: 27519 [2019-09-09 17:07:38,119 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 17:07:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27519 states. [2019-09-09 17:07:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27519 to 27488. [2019-09-09 17:07:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27488 states. [2019-09-09 17:07:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27488 states to 27488 states and 40467 transitions. [2019-09-09 17:07:38,732 INFO L78 Accepts]: Start accepts. Automaton has 27488 states and 40467 transitions. Word has length 157 [2019-09-09 17:07:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:07:38,732 INFO L475 AbstractCegarLoop]: Abstraction has 27488 states and 40467 transitions. [2019-09-09 17:07:38,732 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:07:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 27488 states and 40467 transitions. [2019-09-09 17:07:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-09-09 17:07:38,738 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:07:38,739 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 17:07:38,739 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:07:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:07:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2017004392, now seen corresponding path program 1 times [2019-09-09 17:07:38,740 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:07:38,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:38,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:07:38,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:07:38,743 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:07:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:07:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 70 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:07:39,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:07:39,100 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:07:39,101 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 237 with the following transitions: [2019-09-09 17:07:39,103 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2871], [2873], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3155], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3336], [3341], [3343], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:07:39,157 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:07:39,158 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:08:47,468 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:08:47,470 INFO L272 AbstractInterpreter]: Visited 121 different actions 121 times. Never merged. Never widened. Performed 162 root evaluator evaluations with a maximum evaluation depth of 17. Performed 162 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:08:47,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:08:47,475 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:09:49,829 INFO L227 lantSequenceWeakener]: Weakened 225 states. On average, predicates are now at 71.1% of their original sizes. [2019-09-09 17:09:49,830 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:09:49,871 INFO L420 sIntCurrentIteration]: We unified 235 AI predicates to 235 [2019-09-09 17:09:49,871 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:09:49,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:09:49,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:09:49,872 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:09:49,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:09:49,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:09:49,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:09:49,874 INFO L87 Difference]: Start difference. First operand 27488 states and 40467 transitions. Second operand 8 states. [2019-09-09 17:12:16,056 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.