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_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:42:00,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:42:00,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:42:00,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:42:00,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:42:00,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:42:00,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:42:00,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:42:00,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:42:00,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:42:00,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:42:00,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:42:00,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:42:00,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:42:00,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:42:00,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:42:00,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:42:00,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:42:00,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:42:00,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:42:00,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:42:00,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:42:00,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:42:00,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:42:00,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:42:00,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:42:00,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:42:00,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:42:00,592 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 17:42:00,606 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:42:00,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:42:00,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:42:00,607 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:42:00,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:42:00,608 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:42:00,608 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:42:00,608 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:42:00,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:42:00,609 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:42:00,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:42:00,609 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:42:00,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:42:00,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:42:00,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:42:00,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:42:00,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:42:00,611 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:42:00,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:42:00,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:42:00,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:42:00,611 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:42:00,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:42:00,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:42:00,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:42:00,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:42:00,612 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:42:00,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:42:00,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:42:00,613 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:42:00,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:42:00,654 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:42:00,658 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:42:00,659 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:42:00,660 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:42:00,660 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label46.c [2019-09-09 17:42:00,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63d436ff/766dbaaeb00a4ad0a86c934fdab963ef/FLAG621d19b39 [2019-09-09 17:42:01,513 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:42:01,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label46.c [2019-09-09 17:42:01,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63d436ff/766dbaaeb00a4ad0a86c934fdab963ef/FLAG621d19b39 [2019-09-09 17:42:02,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b63d436ff/766dbaaeb00a4ad0a86c934fdab963ef [2019-09-09 17:42:02,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:42:02,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:42:02,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:42:02,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:42:02,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:42:02,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:42:02" (1/1) ... [2019-09-09 17:42:02,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57728f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:02, skipping insertion in model container [2019-09-09 17:42:02,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:42:02" (1/1) ... [2019-09-09 17:42:02,115 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:42:02,294 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:42:03,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:42:03,955 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:42:04,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:42:04,713 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:42:04,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04 WrapperNode [2019-09-09 17:42:04,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:42:04,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:42:04,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:42:04,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:42:04,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04" (1/1) ... [2019-09-09 17:42:04,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04" (1/1) ... [2019-09-09 17:42:04,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04" (1/1) ... [2019-09-09 17:42:04,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04" (1/1) ... [2019-09-09 17:42:04,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04" (1/1) ... [2019-09-09 17:42:04,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04" (1/1) ... [2019-09-09 17:42:05,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04" (1/1) ... [2019-09-09 17:42:05,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:42:05,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:42:05,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:42:05,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:42:05,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04" (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 17:42:05,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:42:05,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:42:05,152 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:42:05,152 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:42:05,153 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:42:05,153 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:42:05,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:42:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:42:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:42:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:42:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:42:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:42:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:42:05,158 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:42:05,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:42:05,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:42:05,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:42:12,085 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:42:12,086 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:42:12,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:42:12 BoogieIcfgContainer [2019-09-09 17:42:12,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:42:12,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:42:12,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:42:12,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:42:12,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:42:02" (1/3) ... [2019-09-09 17:42:12,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0dfa36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:42:12, skipping insertion in model container [2019-09-09 17:42:12,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:42:04" (2/3) ... [2019-09-09 17:42:12,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0dfa36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:42:12, skipping insertion in model container [2019-09-09 17:42:12,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:42:12" (3/3) ... [2019-09-09 17:42:12,115 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label46.c [2019-09-09 17:42:12,131 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:42:12,145 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:42:12,170 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:42:12,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:42:12,211 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:42:12,211 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:42:12,211 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:42:12,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:42:12,211 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:42:12,211 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:42:12,212 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:42:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:42:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-09 17:42:12,300 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:42:12,302 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, 1, 1, 1, 1, 1] [2019-09-09 17:42:12,305 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:42:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:42:12,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1542666417, now seen corresponding path program 1 times [2019-09-09 17:42:12,315 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:42:12,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:12,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:42:12,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:12,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:42:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:42:12,816 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 17:42:12,818 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:42:12,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:42:12,819 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:42:12,825 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:42:12,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:42:12,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:42:12,843 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:42:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:42:19,429 INFO L93 Difference]: Finished difference Result 1985 states and 3521 transitions. [2019-09-09 17:42:19,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:42:19,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-09-09 17:42:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:42:19,466 INFO L225 Difference]: With dead ends: 1985 [2019-09-09 17:42:19,466 INFO L226 Difference]: Without dead ends: 1917 [2019-09-09 17:42:19,468 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 17:42:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2019-09-09 17:42:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1897. [2019-09-09 17:42:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2019-09-09 17:42:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 3364 transitions. [2019-09-09 17:42:19,647 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 3364 transitions. Word has length 72 [2019-09-09 17:42:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:42:19,650 INFO L475 AbstractCegarLoop]: Abstraction has 1897 states and 3364 transitions. [2019-09-09 17:42:19,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:42:19,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 3364 transitions. [2019-09-09 17:42:19,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-09 17:42:19,666 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:42:19,666 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:42:19,667 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:42:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:42:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1826001525, now seen corresponding path program 1 times [2019-09-09 17:42:19,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:42:19,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:19,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:42:19,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:19,671 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:42:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:42:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:42:19,905 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:42:19,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:42:19,906 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:42:19,908 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:42:19,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:42:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:42:19,910 INFO L87 Difference]: Start difference. First operand 1897 states and 3364 transitions. Second operand 5 states. [2019-09-09 17:42:28,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:42:28,980 INFO L93 Difference]: Finished difference Result 3678 states and 5873 transitions. [2019-09-09 17:42:28,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:42:28,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-09-09 17:42:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:42:29,002 INFO L225 Difference]: With dead ends: 3678 [2019-09-09 17:42:29,003 INFO L226 Difference]: Without dead ends: 3678 [2019-09-09 17:42:29,004 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 17:42:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2019-09-09 17:42:29,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3595. [2019-09-09 17:42:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3595 states. [2019-09-09 17:42:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 5740 transitions. [2019-09-09 17:42:29,115 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 5740 transitions. Word has length 147 [2019-09-09 17:42:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:42:29,116 INFO L475 AbstractCegarLoop]: Abstraction has 3595 states and 5740 transitions. [2019-09-09 17:42:29,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:42:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 5740 transitions. [2019-09-09 17:42:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-09-09 17:42:29,119 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:42:29,120 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, 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] [2019-09-09 17:42:29,120 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:42:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:42:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash 93459516, now seen corresponding path program 1 times [2019-09-09 17:42:29,121 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:42:29,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:29,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:42:29,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:29,122 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:42:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:42:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:42:29,278 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:42:29,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:42:29,278 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:42:29,281 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:42:29,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:42:29,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:42:29,282 INFO L87 Difference]: Start difference. First operand 3595 states and 5740 transitions. Second operand 6 states. [2019-09-09 17:42:37,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:42:37,095 INFO L93 Difference]: Finished difference Result 7092 states and 10572 transitions. [2019-09-09 17:42:37,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:42:37,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2019-09-09 17:42:37,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:42:37,138 INFO L225 Difference]: With dead ends: 7092 [2019-09-09 17:42:37,138 INFO L226 Difference]: Without dead ends: 7092 [2019-09-09 17:42:37,147 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 17:42:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2019-09-09 17:42:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 7045. [2019-09-09 17:42:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7045 states. [2019-09-09 17:42:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7045 states to 7045 states and 10390 transitions. [2019-09-09 17:42:37,363 INFO L78 Accepts]: Start accepts. Automaton has 7045 states and 10390 transitions. Word has length 148 [2019-09-09 17:42:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:42:37,365 INFO L475 AbstractCegarLoop]: Abstraction has 7045 states and 10390 transitions. [2019-09-09 17:42:37,365 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:42:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7045 states and 10390 transitions. [2019-09-09 17:42:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-09 17:42:37,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:42:37,371 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, 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] [2019-09-09 17:42:37,371 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:42:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:42:37,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1499317899, now seen corresponding path program 1 times [2019-09-09 17:42:37,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:42:37,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:37,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:42:37,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:37,374 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:42:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:42:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:42:37,570 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:42:37,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:42:37,570 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:42:37,572 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:42:37,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:42:37,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:42:37,572 INFO L87 Difference]: Start difference. First operand 7045 states and 10390 transitions. Second operand 3 states. [2019-09-09 17:42:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:42:42,637 INFO L93 Difference]: Finished difference Result 13696 states and 19652 transitions. [2019-09-09 17:42:42,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:42:42,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-09-09 17:42:42,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:42:42,706 INFO L225 Difference]: With dead ends: 13696 [2019-09-09 17:42:42,706 INFO L226 Difference]: Without dead ends: 13696 [2019-09-09 17:42:42,707 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 17:42:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13696 states. [2019-09-09 17:42:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13696 to 13695. [2019-09-09 17:42:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13695 states. [2019-09-09 17:42:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13695 states to 13695 states and 19650 transitions. [2019-09-09 17:42:43,036 INFO L78 Accepts]: Start accepts. Automaton has 13695 states and 19650 transitions. Word has length 172 [2019-09-09 17:42:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:42:43,039 INFO L475 AbstractCegarLoop]: Abstraction has 13695 states and 19650 transitions. [2019-09-09 17:42:43,039 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:42:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 13695 states and 19650 transitions. [2019-09-09 17:42:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-09 17:42:43,049 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:42:43,049 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:42:43,050 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:42:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:42:43,051 INFO L82 PathProgramCache]: Analyzing trace with hash -138570541, now seen corresponding path program 1 times [2019-09-09 17:42:43,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:42:43,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:43,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:42:43,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:42:43,052 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:42:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:42:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 130 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:42:43,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:42:43,318 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:42:43,320 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2019-09-09 17:42:43,323 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], [2971], [2979], [2987], [2995], [3003], [3011], [3019], [3027], [3035], [3043], [3051], [3059], [3067], [3075], [3083], [3091], [3099], [3107], [3111], [3113], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3151], [3152], [3156], [3159], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:42:43,407 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:42:43,408 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:42:59,825 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:42:59,827 INFO L272 AbstractInterpreter]: Visited 82 different actions 82 times. Never merged. Never widened. Performed 123 root evaluator evaluations with a maximum evaluation depth of 17. Performed 123 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:42:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:42:59,832 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:43:24,432 INFO L227 lantSequenceWeakener]: Weakened 215 states. On average, predicates are now at 71.7% of their original sizes. [2019-09-09 17:43:24,433 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:43:24,482 INFO L420 sIntCurrentIteration]: We unified 223 AI predicates to 223 [2019-09-09 17:43:24,486 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:43:24,487 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:43:24,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-09-09 17:43:24,487 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:43:24,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 17:43:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 17:43:24,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 17:43:24,489 INFO L87 Difference]: Start difference. First operand 13695 states and 19650 transitions. Second operand 7 states. [2019-09-09 17:46:13,655 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.