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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:47:22,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:47:22,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:47:22,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:47:22,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:47:22,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:47:22,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:47:22,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:47:22,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:47:22,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:47:22,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:47:22,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:47:22,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:47:22,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:47:22,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:47:22,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:47:22,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:47:22,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:47:22,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:47:22,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:47:22,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:47:22,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:47:22,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:47:22,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:47:22,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:47:22,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:47:22,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:47:22,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:47:22,714 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 17:47:22,740 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:47:22,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:47:22,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:47:22,742 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:47:22,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:47:22,743 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:47:22,743 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:47:22,743 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:47:22,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:47:22,744 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:47:22,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:47:22,746 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:47:22,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:47:22,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:47:22,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:47:22,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:47:22,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:47:22,747 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:47:22,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:47:22,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:47:22,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:47:22,748 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:47:22,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:47:22,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:47:22,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:47:22,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:47:22,749 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:47:22,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:47:22,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:47:22,750 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:47:22,796 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:47:22,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:47:22,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:47:22,813 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:47:22,813 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:47:22,814 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label55.c [2019-09-09 17:47:22,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60ae2a5e/7976bfb921b64845864a97049e384608/FLAG5d592214c [2019-09-09 17:47:23,663 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:47:23,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label55.c [2019-09-09 17:47:23,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60ae2a5e/7976bfb921b64845864a97049e384608/FLAG5d592214c [2019-09-09 17:47:24,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60ae2a5e/7976bfb921b64845864a97049e384608 [2019-09-09 17:47:24,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:47:24,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:47:24,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:47:24,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:47:24,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:47:24,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:47:24" (1/1) ... [2019-09-09 17:47:24,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e8182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:24, skipping insertion in model container [2019-09-09 17:47:24,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:47:24" (1/1) ... [2019-09-09 17:47:24,163 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:47:24,339 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:47:25,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:47:25,943 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:47:26,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:47:26,608 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:47:26,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26 WrapperNode [2019-09-09 17:47:26,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:47:26,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:47:26,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:47:26,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:47:26,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26" (1/1) ... [2019-09-09 17:47:26,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26" (1/1) ... [2019-09-09 17:47:26,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26" (1/1) ... [2019-09-09 17:47:26,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26" (1/1) ... [2019-09-09 17:47:26,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26" (1/1) ... [2019-09-09 17:47:26,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26" (1/1) ... [2019-09-09 17:47:26,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26" (1/1) ... [2019-09-09 17:47:27,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:47:27,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:47:27,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:47:27,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:47:27,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26" (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 17:47:27,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:47:27,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:47:27,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:47:27,098 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:47:27,098 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:47:27,098 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:47:27,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:47:27,098 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:47:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:47:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:47:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:47:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:47:27,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:47:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:47:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:47:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:47:27,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:47:32,818 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:47:32,818 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:47:32,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:47:32 BoogieIcfgContainer [2019-09-09 17:47:32,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:47:32,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:47:32,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:47:32,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:47:32,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:47:24" (1/3) ... [2019-09-09 17:47:32,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1859215f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:47:32, skipping insertion in model container [2019-09-09 17:47:32,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:47:26" (2/3) ... [2019-09-09 17:47:32,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1859215f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:47:32, skipping insertion in model container [2019-09-09 17:47:32,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:47:32" (3/3) ... [2019-09-09 17:47:32,833 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label55.c [2019-09-09 17:47:32,843 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:47:32,852 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:47:32,869 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:47:32,895 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:47:32,896 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:47:32,896 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:47:32,896 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:47:32,896 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:47:32,896 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:47:32,896 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:47:32,897 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:47:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:47:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-09 17:47:32,949 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:47:32,950 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] [2019-09-09 17:47:32,952 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:47:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:47:32,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2115758055, now seen corresponding path program 1 times [2019-09-09 17:47:32,960 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:47:33,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:33,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:47:33,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:33,011 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:47:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:47:33,385 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 17:47:33,388 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:47:33,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:47:33,389 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:47:33,395 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:47:33,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:47:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:47:33,418 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:47:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:47:39,244 INFO L93 Difference]: Finished difference Result 1981 states and 3232 transitions. [2019-09-09 17:47:39,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:47:39,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-09-09 17:47:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:47:39,279 INFO L225 Difference]: With dead ends: 1981 [2019-09-09 17:47:39,279 INFO L226 Difference]: Without dead ends: 1913 [2019-09-09 17:47:39,282 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 17:47:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2019-09-09 17:47:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2019-09-09 17:47:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1912 states. [2019-09-09 17:47:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3141 transitions. [2019-09-09 17:47:39,432 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3141 transitions. Word has length 54 [2019-09-09 17:47:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:47:39,433 INFO L475 AbstractCegarLoop]: Abstraction has 1912 states and 3141 transitions. [2019-09-09 17:47:39,434 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:47:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3141 transitions. [2019-09-09 17:47:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-09-09 17:47:39,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:47:39,445 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:39,445 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:47:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:47:39,445 INFO L82 PathProgramCache]: Analyzing trace with hash 363778051, now seen corresponding path program 1 times [2019-09-09 17:47:39,446 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:47:39,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:39,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:47:39,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:39,447 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:47:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:47:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:47:39,692 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:47:39,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:47:39,692 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:47:39,694 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:47:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:47:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:47:39,695 INFO L87 Difference]: Start difference. First operand 1912 states and 3141 transitions. Second operand 5 states. [2019-09-09 17:47:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:47:49,051 INFO L93 Difference]: Finished difference Result 3683 states and 5547 transitions. [2019-09-09 17:47:49,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:47:49,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2019-09-09 17:47:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:47:49,077 INFO L225 Difference]: With dead ends: 3683 [2019-09-09 17:47:49,078 INFO L226 Difference]: Without dead ends: 3683 [2019-09-09 17:47:49,079 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 17:47:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2019-09-09 17:47:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 3601. [2019-09-09 17:47:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3601 states. [2019-09-09 17:47:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5413 transitions. [2019-09-09 17:47:49,167 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5413 transitions. Word has length 129 [2019-09-09 17:47:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:47:49,168 INFO L475 AbstractCegarLoop]: Abstraction has 3601 states and 5413 transitions. [2019-09-09 17:47:49,168 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:47:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5413 transitions. [2019-09-09 17:47:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-09 17:47:49,171 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:47:49,171 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:47:49,172 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:47:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:47:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash 469907495, now seen corresponding path program 1 times [2019-09-09 17:47:49,172 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:47:49,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:49,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:47:49,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:47:49,174 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:47:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:47:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:47:49,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:47:49,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:47:49,320 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:47:49,323 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:47:49,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:47:49,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:47:49,324 INFO L87 Difference]: Start difference. First operand 3601 states and 5413 transitions. Second operand 5 states. [2019-09-09 17:48:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:48:06,005 INFO L93 Difference]: Finished difference Result 7306 states and 10880 transitions. [2019-09-09 17:48:06,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:48:06,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-09-09 17:48:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:48:06,045 INFO L225 Difference]: With dead ends: 7306 [2019-09-09 17:48:06,046 INFO L226 Difference]: Without dead ends: 7306 [2019-09-09 17:48:06,046 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 17:48:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2019-09-09 17:48:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7121. [2019-09-09 17:48:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7121 states. [2019-09-09 17:48:06,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 10497 transitions. [2019-09-09 17:48:06,249 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 10497 transitions. Word has length 143 [2019-09-09 17:48:06,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:48:06,250 INFO L475 AbstractCegarLoop]: Abstraction has 7121 states and 10497 transitions. [2019-09-09 17:48:06,250 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:48:06,250 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 10497 transitions. [2019-09-09 17:48:06,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-09-09 17:48:06,254 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:48:06,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:06,255 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:48:06,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:48:06,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1827062467, now seen corresponding path program 1 times [2019-09-09 17:48:06,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:48:06,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:48:06,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:48:06,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:48:06,257 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:48:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:48:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:48:06,508 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:48:06,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:48:06,508 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:48:06,509 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:48:06,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:48:06,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:48:06,510 INFO L87 Difference]: Start difference. First operand 7121 states and 10497 transitions. Second operand 6 states. [2019-09-09 17:48:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:48:14,418 INFO L93 Difference]: Finished difference Result 14335 states and 22345 transitions. [2019-09-09 17:48:14,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:48:14,420 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2019-09-09 17:48:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:48:14,493 INFO L225 Difference]: With dead ends: 14335 [2019-09-09 17:48:14,494 INFO L226 Difference]: Without dead ends: 14335 [2019-09-09 17:48:14,494 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 17:48:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14335 states. [2019-09-09 17:48:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14335 to 14126. [2019-09-09 17:48:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14126 states. [2019-09-09 17:48:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14126 states to 14126 states and 21305 transitions. [2019-09-09 17:48:14,904 INFO L78 Accepts]: Start accepts. Automaton has 14126 states and 21305 transitions. Word has length 161 [2019-09-09 17:48:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:48:14,906 INFO L475 AbstractCegarLoop]: Abstraction has 14126 states and 21305 transitions. [2019-09-09 17:48:14,906 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:48:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 14126 states and 21305 transitions. [2019-09-09 17:48:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-09-09 17:48:14,909 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:48:14,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:14,910 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:48:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:48:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash 970601011, now seen corresponding path program 1 times [2019-09-09 17:48:14,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:48:14,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:48:14,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:48:14,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:48:14,912 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:48:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:48:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:48:15,051 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:48:15,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:48:15,051 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:48:15,052 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:48:15,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:48:15,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:48:15,054 INFO L87 Difference]: Start difference. First operand 14126 states and 21305 transitions. Second operand 4 states. [2019-09-09 17:48:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:48:23,030 INFO L93 Difference]: Finished difference Result 27519 states and 40522 transitions. [2019-09-09 17:48:23,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:48:23,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 169 [2019-09-09 17:48:23,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:48:23,139 INFO L225 Difference]: With dead ends: 27519 [2019-09-09 17:48:23,140 INFO L226 Difference]: Without dead ends: 27519 [2019-09-09 17:48:23,140 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 17:48:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27519 states. [2019-09-09 17:48:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27519 to 27488. [2019-09-09 17:48:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27488 states. [2019-09-09 17:48:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27488 states to 27488 states and 40467 transitions. [2019-09-09 17:48:23,997 INFO L78 Accepts]: Start accepts. Automaton has 27488 states and 40467 transitions. Word has length 169 [2019-09-09 17:48:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:48:23,998 INFO L475 AbstractCegarLoop]: Abstraction has 27488 states and 40467 transitions. [2019-09-09 17:48:23,998 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:48:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 27488 states and 40467 transitions. [2019-09-09 17:48:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-09-09 17:48:24,005 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:48:24,005 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, 2, 2, 2, 2, 2, 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 17:48:24,007 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:48:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:48:24,007 INFO L82 PathProgramCache]: Analyzing trace with hash 850298504, now seen corresponding path program 1 times [2019-09-09 17:48:24,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:48:24,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:48:24,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:48:24,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:48:24,011 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:48:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:48:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 94 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:48:24,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:48:24,211 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:48:24,212 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 249 with the following transitions: [2019-09-09 17:48:24,216 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], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2955], [2963], [2967], [2969], [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 17:48:24,310 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:48:24,312 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:49:34,461 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:49:34,463 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 17:49:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:49:34,467 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:50:38,037 INFO L227 lantSequenceWeakener]: Weakened 237 states. On average, predicates are now at 71.3% of their original sizes. [2019-09-09 17:50:38,037 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:50:38,086 INFO L420 sIntCurrentIteration]: We unified 247 AI predicates to 247 [2019-09-09 17:50:38,086 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:50:38,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:50:38,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:50:38,088 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:50:38,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:50:38,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:50:38,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:50:38,089 INFO L87 Difference]: Start difference. First operand 27488 states and 40467 transitions. Second operand 8 states. [2019-09-09 17:54:05,898 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.