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/Problem19_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:14:38,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:14:38,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:14:38,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:14:38,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:14:38,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:14:38,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:14:38,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:14:38,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:14:38,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:14:38,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:14:38,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:14:38,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:14:38,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:14:38,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:14:38,235 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 23:14:38,258 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:14:38,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:14:38,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:14:38,260 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:14:38,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:14:38,260 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:14:38,261 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:14:38,261 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:14:38,261 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:14:38,261 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:14:38,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:14:38,263 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:14:38,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:14:38,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:14:38,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:14:38,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:14:38,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:14:38,265 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:14:38,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:14:38,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:14:38,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:14:38,266 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:14:38,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:14:38,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:14:38,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:14:38,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:14:38,267 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:14:38,267 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:14:38,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:14:38,267 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:14:38,309 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:14:38,321 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:14:38,327 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:14:38,329 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:14:38,329 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:14:38,330 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label22.c [2019-09-09 23:14:38,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c380edd9/1ba5aa5a81eb4e9aa2f501b167e0f5dd/FLAG048353519 [2019-09-09 23:14:39,344 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:14:39,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label22.c [2019-09-09 23:14:39,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c380edd9/1ba5aa5a81eb4e9aa2f501b167e0f5dd/FLAG048353519 [2019-09-09 23:14:39,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c380edd9/1ba5aa5a81eb4e9aa2f501b167e0f5dd [2019-09-09 23:14:39,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:14:39,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:14:39,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:14:39,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:14:39,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:14:39,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:14:39" (1/1) ... [2019-09-09 23:14:39,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74acbc84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:39, skipping insertion in model container [2019-09-09 23:14:39,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:14:39" (1/1) ... [2019-09-09 23:14:39,823 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:14:40,009 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:14:42,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:14:42,300 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:14:43,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:14:43,465 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:14:43,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43 WrapperNode [2019-09-09 23:14:43,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:14:43,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:14:43,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:14:43,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:14:43,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43" (1/1) ... [2019-09-09 23:14:43,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43" (1/1) ... [2019-09-09 23:14:43,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43" (1/1) ... [2019-09-09 23:14:43,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43" (1/1) ... [2019-09-09 23:14:43,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43" (1/1) ... [2019-09-09 23:14:43,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43" (1/1) ... [2019-09-09 23:14:43,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43" (1/1) ... [2019-09-09 23:14:43,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:14:43,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:14:43,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:14:43,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:14:43,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43" (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 23:14:43,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:14:43,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:14:43,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:14:43,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:14:43,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:14:43,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:14:43,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:14:43,969 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:14:43,970 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:14:43,970 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:14:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:14:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:14:43,971 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:14:43,972 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:14:43,972 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:14:43,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:14:43,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:14:43,973 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:14:43,974 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:14:43,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:14:43,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:14:55,003 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:14:55,003 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:14:55,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:14:55 BoogieIcfgContainer [2019-09-09 23:14:55,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:14:55,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:14:55,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:14:55,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:14:55,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:14:39" (1/3) ... [2019-09-09 23:14:55,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb072ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:14:55, skipping insertion in model container [2019-09-09 23:14:55,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:14:43" (2/3) ... [2019-09-09 23:14:55,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb072ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:14:55, skipping insertion in model container [2019-09-09 23:14:55,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:14:55" (3/3) ... [2019-09-09 23:14:55,024 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label22.c [2019-09-09 23:14:55,039 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:14:55,053 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:14:55,075 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:14:55,110 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:14:55,110 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:14:55,111 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:14:55,111 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:14:55,111 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:14:55,111 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:14:55,111 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:14:55,111 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:14:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:14:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-09 23:14:55,187 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:14:55,188 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] [2019-09-09 23:14:55,190 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:14:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:14:55,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1442037684, now seen corresponding path program 1 times [2019-09-09 23:14:55,198 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:14:55,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:14:55,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:14:55,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:14:55,257 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:14:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:14:55,556 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 23:14:55,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:14:55,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:14:55,559 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:14:55,565 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:14:55,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:14:55,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:14:55,584 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-09 23:15:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:15:08,855 INFO L93 Difference]: Finished difference Result 3260 states and 6034 transitions. [2019-09-09 23:15:08,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:15:08,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2019-09-09 23:15:08,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:15:08,901 INFO L225 Difference]: With dead ends: 3260 [2019-09-09 23:15:08,902 INFO L226 Difference]: Without dead ends: 3192 [2019-09-09 23:15:08,904 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 23:15:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2019-09-09 23:15:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3145. [2019-09-09 23:15:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3145 states. [2019-09-09 23:15:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5823 transitions. [2019-09-09 23:15:09,090 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5823 transitions. Word has length 35 [2019-09-09 23:15:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:15:09,091 INFO L475 AbstractCegarLoop]: Abstraction has 3145 states and 5823 transitions. [2019-09-09 23:15:09,091 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:15:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5823 transitions. [2019-09-09 23:15:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-09 23:15:09,096 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:15:09,096 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:09,097 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:15:09,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:15:09,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1615939192, now seen corresponding path program 1 times [2019-09-09 23:15:09,098 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:15:09,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:15:09,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:15:09,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:15:09,099 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:15:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:15:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:15:09,264 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:15:09,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:15:09,265 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:15:09,267 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:15:09,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:15:09,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:15:09,268 INFO L87 Difference]: Start difference. First operand 3145 states and 5823 transitions. Second operand 6 states. [2019-09-09 23:15:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:15:25,005 INFO L93 Difference]: Finished difference Result 6263 states and 11110 transitions. [2019-09-09 23:15:25,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-09 23:15:25,008 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-09-09 23:15:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:15:25,047 INFO L225 Difference]: With dead ends: 6263 [2019-09-09 23:15:25,047 INFO L226 Difference]: Without dead ends: 6263 [2019-09-09 23:15:25,048 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:15:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2019-09-09 23:15:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 6157. [2019-09-09 23:15:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6157 states. [2019-09-09 23:15:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 10968 transitions. [2019-09-09 23:15:25,259 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 10968 transitions. Word has length 107 [2019-09-09 23:15:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:15:25,260 INFO L475 AbstractCegarLoop]: Abstraction has 6157 states and 10968 transitions. [2019-09-09 23:15:25,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:15:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 10968 transitions. [2019-09-09 23:15:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-09 23:15:25,272 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:15:25,274 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:15:25,275 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:15:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:15:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1610718421, now seen corresponding path program 1 times [2019-09-09 23:15:25,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:15:25,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:15:25,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:15:25,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:15:25,279 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:15:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:15:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:15:25,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:15:25,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:15:25,525 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:15:25,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:15:25,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:15:25,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:15:25,533 INFO L87 Difference]: Start difference. First operand 6157 states and 10968 transitions. Second operand 5 states. [2019-09-09 23:15:43,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:15:43,323 INFO L93 Difference]: Finished difference Result 12438 states and 18625 transitions. [2019-09-09 23:15:43,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 23:15:43,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2019-09-09 23:15:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:15:43,382 INFO L225 Difference]: With dead ends: 12438 [2019-09-09 23:15:43,383 INFO L226 Difference]: Without dead ends: 12438 [2019-09-09 23:15:43,383 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 23:15:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12438 states. [2019-09-09 23:15:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12438 to 12168. [2019-09-09 23:15:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2019-09-09 23:15:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 18247 transitions. [2019-09-09 23:15:43,714 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 18247 transitions. Word has length 121 [2019-09-09 23:15:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:15:43,717 INFO L475 AbstractCegarLoop]: Abstraction has 12168 states and 18247 transitions. [2019-09-09 23:15:43,717 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:15:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 18247 transitions. [2019-09-09 23:15:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-09-09 23:15:43,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:15:43,724 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 23:15:43,724 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:15:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:15:43,725 INFO L82 PathProgramCache]: Analyzing trace with hash 704629599, now seen corresponding path program 1 times [2019-09-09 23:15:43,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:15:43,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:15:43,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:15:43,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:15:43,727 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:15:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:15:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 56 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 23:15:43,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:15:43,988 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:15:43,990 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2019-09-09 23:15:43,993 INFO L207 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5414], [5416], [5419], [5427], [5435], [5443], [5451], [5459], [5467], [5475], [5483], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5822], [5823], [5827], [5838], [5841], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:15:44,065 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:15:44,066 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:15:50,966 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:15:50,968 INFO L272 AbstractInterpreter]: Visited 94 different actions 94 times. Never merged. Never widened. Performed 232 root evaluator evaluations with a maximum evaluation depth of 14. Performed 232 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:15:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:15:50,972 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:15:58,476 INFO L227 lantSequenceWeakener]: Weakened 191 states. On average, predicates are now at 75.51% of their original sizes. [2019-09-09 23:15:58,477 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:15:58,550 INFO L420 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2019-09-09 23:15:58,551 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:15:58,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:15:58,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 23:15:58,552 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:15:58,553 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 23:15:58,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 23:15:58,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:15:58,553 INFO L87 Difference]: Start difference. First operand 12168 states and 18247 transitions. Second operand 10 states. [2019-09-09 23:20:14,394 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.