java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:03:11,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:03:11,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:03:11,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 15:03:11,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 15:03:11,993 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:03:11,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:03:11,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:03:11,993 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:03:11,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:03:11,994 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:03:11,995 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:03:11,995 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:03:11,995 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:03:11,995 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:03:11,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:03:11,996 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:03:11,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:03:11,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:03:11,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:03:11,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:03:11,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:03:11,997 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:03:11,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:03:11,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:03:11,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:03:11,998 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:03:11,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:03:11,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:03:11,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:03:11,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:03:11,999 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:03:11,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:03:11,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:03:11,999 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:03:12,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:03:12,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:03:12,046 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:03:12,047 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:03:12,048 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:03:12,048 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label11.c [2019-09-09 15:03:12,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58d8d9f56/864b414f24cb48da9d7f64a1c798e462/FLAGfe84ae4d4 [2019-09-09 15:03:12,727 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:03:12,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label11.c [2019-09-09 15:03:12,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58d8d9f56/864b414f24cb48da9d7f64a1c798e462/FLAGfe84ae4d4 [2019-09-09 15:03:12,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58d8d9f56/864b414f24cb48da9d7f64a1c798e462 [2019-09-09 15:03:12,990 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:03:12,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:03:12,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:03:12,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:03:12,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:03:12,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:03:12" (1/1) ... [2019-09-09 15:03:13,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc6461a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:12, skipping insertion in model container [2019-09-09 15:03:13,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:03:12" (1/1) ... [2019-09-09 15:03:13,009 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:03:13,079 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:03:13,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:03:13,851 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:03:13,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:03:14,010 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:03:14,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14 WrapperNode [2019-09-09 15:03:14,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:03:14,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:03:14,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:03:14,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:03:14,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14" (1/1) ... [2019-09-09 15:03:14,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14" (1/1) ... [2019-09-09 15:03:14,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14" (1/1) ... [2019-09-09 15:03:14,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14" (1/1) ... [2019-09-09 15:03:14,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14" (1/1) ... [2019-09-09 15:03:14,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14" (1/1) ... [2019-09-09 15:03:14,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14" (1/1) ... [2019-09-09 15:03:14,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:03:14,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:03:14,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:03:14,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:03:14,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:03:14,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:03:14,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:03:14,286 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:03:14,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:03:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:03:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:03:14,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:03:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:03:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:03:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:03:14,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:03:16,048 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:03:16,049 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:03:16,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:03:16 BoogieIcfgContainer [2019-09-09 15:03:16,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:03:16,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:03:16,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:03:16,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:03:16,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:03:12" (1/3) ... [2019-09-09 15:03:16,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4197ac72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:03:16, skipping insertion in model container [2019-09-09 15:03:16,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:03:14" (2/3) ... [2019-09-09 15:03:16,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4197ac72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:03:16, skipping insertion in model container [2019-09-09 15:03:16,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:03:16" (3/3) ... [2019-09-09 15:03:16,059 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label11.c [2019-09-09 15:03:16,070 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:03:16,079 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:03:16,096 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:03:16,123 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:03:16,124 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:03:16,124 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:03:16,124 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:03:16,125 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:03:16,125 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:03:16,125 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:03:16,125 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:03:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-09-09 15:03:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-09 15:03:16,186 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:03:16,188 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:03:16,190 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:03:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:03:16,197 INFO L82 PathProgramCache]: Analyzing trace with hash -573919190, now seen corresponding path program 1 times [2019-09-09 15:03:16,200 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:03:16,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:03:16,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:03:16,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:03:16,257 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:03:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:03:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:03:16,696 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:03:16,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 15:03:16,696 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:03:16,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 15:03:16,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 15:03:16,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 15:03:16,718 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-09-09 15:03:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:03:18,178 INFO L93 Difference]: Finished difference Result 493 states and 799 transitions. [2019-09-09 15:03:18,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 15:03:18,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2019-09-09 15:03:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:03:18,200 INFO L225 Difference]: With dead ends: 493 [2019-09-09 15:03:18,200 INFO L226 Difference]: Without dead ends: 425 [2019-09-09 15:03:18,202 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 15:03:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-09-09 15:03:18,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-09-09 15:03:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-09-09 15:03:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-09-09 15:03:18,285 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 67 [2019-09-09 15:03:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:03:18,286 INFO L475 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-09-09 15:03:18,286 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 15:03:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-09-09 15:03:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 15:03:18,297 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:03:18,297 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:03:18,297 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:03:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:03:18,298 INFO L82 PathProgramCache]: Analyzing trace with hash -391265842, now seen corresponding path program 1 times [2019-09-09 15:03:18,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:03:18,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:03:18,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:03:18,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:03:18,302 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:03:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:03:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:03:18,560 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:03:18,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 15:03:18,561 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:03:18,563 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 15:03:18,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 15:03:18,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 15:03:18,564 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 4 states. [2019-09-09 15:03:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:03:20,332 INFO L93 Difference]: Finished difference Result 1189 states and 1734 transitions. [2019-09-09 15:03:20,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 15:03:20,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-09-09 15:03:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:03:20,376 INFO L225 Difference]: With dead ends: 1189 [2019-09-09 15:03:20,377 INFO L226 Difference]: Without dead ends: 1189 [2019-09-09 15:03:20,378 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 15:03:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2019-09-09 15:03:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 616. [2019-09-09 15:03:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2019-09-09 15:03:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 938 transitions. [2019-09-09 15:03:20,438 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 938 transitions. Word has length 141 [2019-09-09 15:03:20,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:03:20,439 INFO L475 AbstractCegarLoop]: Abstraction has 616 states and 938 transitions. [2019-09-09 15:03:20,439 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 15:03:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 938 transitions. [2019-09-09 15:03:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-09-09 15:03:20,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:03:20,444 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:03:20,444 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:03:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:03:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1913186172, now seen corresponding path program 1 times [2019-09-09 15:03:20,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:03:20,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:03:20,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:03:20,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:03:20,447 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:03:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:03:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:03:20,586 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:03:20,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:03:20,587 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:03:20,587 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:03:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:03:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:03:20,588 INFO L87 Difference]: Start difference. First operand 616 states and 938 transitions. Second operand 6 states. [2019-09-09 15:03:22,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:03:22,334 INFO L93 Difference]: Finished difference Result 838 states and 1228 transitions. [2019-09-09 15:03:22,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 15:03:22,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2019-09-09 15:03:22,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:03:22,340 INFO L225 Difference]: With dead ends: 838 [2019-09-09 15:03:22,340 INFO L226 Difference]: Without dead ends: 838 [2019-09-09 15:03:22,341 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 15:03:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2019-09-09 15:03:22,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 827. [2019-09-09 15:03:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2019-09-09 15:03:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1209 transitions. [2019-09-09 15:03:22,377 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1209 transitions. Word has length 169 [2019-09-09 15:03:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:03:22,387 INFO L475 AbstractCegarLoop]: Abstraction has 827 states and 1209 transitions. [2019-09-09 15:03:22,387 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:03:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1209 transitions. [2019-09-09 15:03:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-09-09 15:03:22,393 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:03:22,393 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, 3, 3, 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] [2019-09-09 15:03:22,393 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:03:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:03:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1478588639, now seen corresponding path program 1 times [2019-09-09 15:03:22,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:03:22,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:03:22,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:03:22,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:03:22,395 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:03:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:03:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 120 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 15:03:22,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:03:22,642 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:03:22,643 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 233 with the following transitions: [2019-09-09 15:03:22,646 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [445], [447], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [558], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-09-09 15:03:22,706 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:03:22,706 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:04:35,952 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:04:35,954 INFO L272 AbstractInterpreter]: Visited 90 different actions 90 times. Never merged. Never widened. Performed 229 root evaluator evaluations with a maximum evaluation depth of 17. Performed 229 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-09-09 15:04:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:04:35,958 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:06:25,678 INFO L227 lantSequenceWeakener]: Weakened 213 states. On average, predicates are now at 74.07% of their original sizes. [2019-09-09 15:06:25,678 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:06:25,764 INFO L420 sIntCurrentIteration]: We unified 231 AI predicates to 231 [2019-09-09 15:06:25,764 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:06:25,765 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:06:25,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 15:06:25,765 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:06:25,766 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 15:06:25,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 15:06:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 15:06:25,767 INFO L87 Difference]: Start difference. First operand 827 states and 1209 transitions. Second operand 10 states.