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/Problem14_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:40:45,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:40:45,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:40:45,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:40:45,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:40:45,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:40:45,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:40:45,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:40:45,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:40:45,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:40:45,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:40:45,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:40:45,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:40:46,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:40:46,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:40:46,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:40:46,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 18:40:46,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:40:46,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:40:46,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:40:46,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:40:46,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:40:46,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:40:46,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:40:46,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:40:46,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:40:46,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:40:46,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:40:46,016 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 18:40:46,031 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:40:46,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:40:46,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:40:46,032 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:40:46,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:40:46,033 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:40:46,033 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:40:46,034 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:40:46,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:40:46,034 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:40:46,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:40:46,035 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:40:46,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:40:46,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:40:46,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:40:46,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:40:46,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:40:46,036 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:40:46,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:40:46,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:40:46,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:40:46,037 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:40:46,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:40:46,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:40:46,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:40:46,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:40:46,038 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:40:46,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:40:46,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:40:46,038 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:40:46,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:40:46,087 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:40:46,090 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:40:46,091 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:40:46,092 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:40:46,093 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-09-09 18:40:46,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18a433d4/abb565c0f10e4a56856f9084972b4ffe/FLAG663e93687 [2019-09-09 18:40:46,734 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:40:46,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-09-09 18:40:46,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18a433d4/abb565c0f10e4a56856f9084972b4ffe/FLAG663e93687 [2019-09-09 18:40:46,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18a433d4/abb565c0f10e4a56856f9084972b4ffe [2019-09-09 18:40:47,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:40:47,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:40:47,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:40:47,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:40:47,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:40:47,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:40:46" (1/1) ... [2019-09-09 18:40:47,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c68dd03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47, skipping insertion in model container [2019-09-09 18:40:47,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:40:46" (1/1) ... [2019-09-09 18:40:47,026 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:40:47,077 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:40:47,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:40:47,687 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:40:47,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:40:47,855 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:40:47,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47 WrapperNode [2019-09-09 18:40:47,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:40:47,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:40:47,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:40:47,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:40:47,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47" (1/1) ... [2019-09-09 18:40:47,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47" (1/1) ... [2019-09-09 18:40:47,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47" (1/1) ... [2019-09-09 18:40:47,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47" (1/1) ... [2019-09-09 18:40:47,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47" (1/1) ... [2019-09-09 18:40:47,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47" (1/1) ... [2019-09-09 18:40:48,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47" (1/1) ... [2019-09-09 18:40:48,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:40:48,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:40:48,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:40:48,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:40:48,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:40:48,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:40:48,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:40:48,098 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:40:48,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:40:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:40:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:40:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:40:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:40:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:40:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:40:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:40:49,531 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:40:49,531 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:40:49,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:40:49 BoogieIcfgContainer [2019-09-09 18:40:49,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:40:49,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:40:49,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:40:49,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:40:49,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:40:46" (1/3) ... [2019-09-09 18:40:49,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4ce3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:40:49, skipping insertion in model container [2019-09-09 18:40:49,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:40:47" (2/3) ... [2019-09-09 18:40:49,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4ce3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:40:49, skipping insertion in model container [2019-09-09 18:40:49,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:40:49" (3/3) ... [2019-09-09 18:40:49,547 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label55.c [2019-09-09 18:40:49,556 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:40:49,565 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:40:49,581 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:40:49,608 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:40:49,608 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:40:49,609 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:40:49,609 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:40:49,609 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:40:49,609 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:40:49,609 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:40:49,610 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:40:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:40:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-09 18:40:49,646 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:40:49,647 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] [2019-09-09 18:40:49,650 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:40:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:40:49,656 INFO L82 PathProgramCache]: Analyzing trace with hash 606791250, now seen corresponding path program 1 times [2019-09-09 18:40:49,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:40:49,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:40:49,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:40:49,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:40:49,709 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:40:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:40:49,956 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 18:40:49,959 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:40:49,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:40:49,959 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:40:49,965 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:40:49,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:40:49,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:40:49,983 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-09-09 18:40:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:40:51,852 INFO L93 Difference]: Finished difference Result 642 states and 940 transitions. [2019-09-09 18:40:51,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:40:51,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-09-09 18:40:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:40:51,896 INFO L225 Difference]: With dead ends: 642 [2019-09-09 18:40:51,897 INFO L226 Difference]: Without dead ends: 554 [2019-09-09 18:40:51,899 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 18:40:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-09-09 18:40:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-09-09 18:40:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-09-09 18:40:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 806 transitions. [2019-09-09 18:40:52,021 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 806 transitions. Word has length 63 [2019-09-09 18:40:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:40:52,021 INFO L475 AbstractCegarLoop]: Abstraction has 554 states and 806 transitions. [2019-09-09 18:40:52,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:40:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 806 transitions. [2019-09-09 18:40:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-09 18:40:52,037 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:40:52,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:40:52,041 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:40:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:40:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash 905975074, now seen corresponding path program 1 times [2019-09-09 18:40:52,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:40:52,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:40:52,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:40:52,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:40:52,044 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:40:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:40:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:40:52,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:40:52,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:40:52,381 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:40:52,383 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:40:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:40:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:40:52,384 INFO L87 Difference]: Start difference. First operand 554 states and 806 transitions. Second operand 4 states. [2019-09-09 18:40:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:40:53,999 INFO L93 Difference]: Finished difference Result 1646 states and 2331 transitions. [2019-09-09 18:40:54,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:40:54,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-09-09 18:40:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:40:54,013 INFO L225 Difference]: With dead ends: 1646 [2019-09-09 18:40:54,013 INFO L226 Difference]: Without dead ends: 1646 [2019-09-09 18:40:54,014 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 18:40:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-09-09 18:40:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1464. [2019-09-09 18:40:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2019-09-09 18:40:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2038 transitions. [2019-09-09 18:40:54,087 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2038 transitions. Word has length 175 [2019-09-09 18:40:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:40:54,088 INFO L475 AbstractCegarLoop]: Abstraction has 1464 states and 2038 transitions. [2019-09-09 18:40:54,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:40:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2038 transitions. [2019-09-09 18:40:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-09-09 18:40:54,093 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:40:54,094 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, 2, 2, 2, 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] [2019-09-09 18:40:54,094 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:40:54,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:40:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash 338201322, now seen corresponding path program 1 times [2019-09-09 18:40:54,095 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:40:54,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:40:54,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:40:54,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:40:54,096 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:40:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:40:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:40:54,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:40:54,367 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:40:54,368 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 258 with the following transitions: [2019-09-09 18:40:54,371 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:40:54,419 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:40:54,420 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:41:03,975 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:41:03,977 INFO L272 AbstractInterpreter]: Visited 116 different actions 116 times. Never merged. Never widened. Performed 271 root evaluator evaluations with a maximum evaluation depth of 13. Performed 271 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:41:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:41:03,981 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:41:11,953 INFO L227 lantSequenceWeakener]: Weakened 238 states. On average, predicates are now at 78.25% of their original sizes. [2019-09-09 18:41:11,954 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:41:12,056 INFO L420 sIntCurrentIteration]: We unified 256 AI predicates to 256 [2019-09-09 18:41:12,056 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:41:12,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:41:12,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:41:12,058 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:41:12,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:41:12,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:41:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:41:12,060 INFO L87 Difference]: Start difference. First operand 1464 states and 2038 transitions. Second operand 11 states. [2019-09-09 18:42:47,195 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:46:27,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:46:27,482 INFO L93 Difference]: Finished difference Result 1650 states and 2233 transitions. [2019-09-09 18:46:27,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:46:27,482 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 257 [2019-09-09 18:46:27,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:46:27,491 INFO L225 Difference]: With dead ends: 1650 [2019-09-09 18:46:27,491 INFO L226 Difference]: Without dead ends: 1650 [2019-09-09 18:46:27,492 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 18:46:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2019-09-09 18:46:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1646. [2019-09-09 18:46:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-09-09 18:46:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2227 transitions. [2019-09-09 18:46:27,539 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2227 transitions. Word has length 257 [2019-09-09 18:46:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:46:27,539 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2227 transitions. [2019-09-09 18:46:27,539 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:46:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2227 transitions. [2019-09-09 18:46:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2019-09-09 18:46:27,546 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:46:27,547 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:46:27,547 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:46:27,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:46:27,548 INFO L82 PathProgramCache]: Analyzing trace with hash 895332674, now seen corresponding path program 1 times [2019-09-09 18:46:27,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:46:27,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:46:27,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:46:27,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:46:27,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:46:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:46:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 253 proven. 161 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:46:28,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:46:28,251 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:46:28,251 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 342 with the following transitions: [2019-09-09 18:46:28,252 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:46:28,259 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:46:28,259 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:46:39,535 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:46:39,536 INFO L272 AbstractInterpreter]: Visited 120 different actions 235 times. Merged at 4 different actions 5 times. Never widened. Performed 481 root evaluator evaluations with a maximum evaluation depth of 13. Performed 481 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:46:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:46:39,537 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:46:43,930 INFO L227 lantSequenceWeakener]: Weakened 338 states. On average, predicates are now at 77.89% of their original sizes. [2019-09-09 18:46:43,930 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:46:44,003 INFO L420 sIntCurrentIteration]: We unified 340 AI predicates to 340 [2019-09-09 18:46:44,004 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:46:44,004 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:46:44,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:46:44,004 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:46:44,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:46:44,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:46:44,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:46:44,006 INFO L87 Difference]: Start difference. First operand 1646 states and 2227 transitions. Second operand 11 states. [2019-09-09 18:47:16,771 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:48:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:48:39,893 INFO L93 Difference]: Finished difference Result 1862 states and 2454 transitions. [2019-09-09 18:48:39,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:48:39,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 341 [2019-09-09 18:48:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:48:39,903 INFO L225 Difference]: With dead ends: 1862 [2019-09-09 18:48:39,903 INFO L226 Difference]: Without dead ends: 1862 [2019-09-09 18:48:39,904 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:48:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2019-09-09 18:48:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1646. [2019-09-09 18:48:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-09-09 18:48:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2227 transitions. [2019-09-09 18:48:39,947 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2227 transitions. Word has length 341 [2019-09-09 18:48:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:48:39,947 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2227 transitions. [2019-09-09 18:48:39,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:48:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2227 transitions. [2019-09-09 18:48:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2019-09-09 18:48:39,955 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:48:39,955 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:48:39,956 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:48:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:48:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2021159722, now seen corresponding path program 1 times [2019-09-09 18:48:39,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:48:39,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:48:39,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:48:39,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:48:39,958 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:48:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:48:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 225 proven. 166 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-09-09 18:48:40,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:48:40,362 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:48:40,363 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 368 with the following transitions: [2019-09-09 18:48:40,363 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:48:40,370 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:48:40,370 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:48:54,839 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:48:54,839 INFO L272 AbstractInterpreter]: Visited 120 different actions 235 times. Merged at 4 different actions 5 times. Never widened. Performed 561 root evaluator evaluations with a maximum evaluation depth of 13. Performed 561 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:48:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:48:54,840 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:49:06,171 INFO L227 lantSequenceWeakener]: Weakened 364 states. On average, predicates are now at 77.85% of their original sizes. [2019-09-09 18:49:06,172 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:49:06,283 INFO L420 sIntCurrentIteration]: We unified 366 AI predicates to 366 [2019-09-09 18:49:06,283 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:49:06,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:49:06,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-09-09 18:49:06,284 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:49:06,285 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:49:06,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:49:06,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:49:06,286 INFO L87 Difference]: Start difference. First operand 1646 states and 2227 transitions. Second operand 11 states. [2019-09-09 18:49:48,287 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:51:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:51:28,353 INFO L93 Difference]: Finished difference Result 2014 states and 2617 transitions. [2019-09-09 18:51:28,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:51:28,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 367 [2019-09-09 18:51:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:51:28,362 INFO L225 Difference]: With dead ends: 2014 [2019-09-09 18:51:28,363 INFO L226 Difference]: Without dead ends: 2014 [2019-09-09 18:51:28,363 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:51:28,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2019-09-09 18:51:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 2012. [2019-09-09 18:51:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2012 states. [2019-09-09 18:51:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 2615 transitions. [2019-09-09 18:51:28,404 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 2615 transitions. Word has length 367 [2019-09-09 18:51:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:51:28,405 INFO L475 AbstractCegarLoop]: Abstraction has 2012 states and 2615 transitions. [2019-09-09 18:51:28,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:51:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 2615 transitions. [2019-09-09 18:51:28,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2019-09-09 18:51:28,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:51:28,414 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:51:28,414 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:51:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:51:28,415 INFO L82 PathProgramCache]: Analyzing trace with hash 62409986, now seen corresponding path program 1 times [2019-09-09 18:51:28,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:51:28,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:51:28,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:51:28,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:51:28,416 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:51:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:51:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 304 proven. 124 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 18:51:28,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:51:28,798 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:51:28,798 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 394 with the following transitions: [2019-09-09 18:51:28,798 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:51:28,802 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:51:28,802 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:51:42,380 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:51:59,563 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:51:59,563 INFO L272 AbstractInterpreter]: Visited 120 different actions 467 times. Merged at 6 different actions 17 times. Never widened. Performed 864 root evaluator evaluations with a maximum evaluation depth of 22. Performed 864 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 4 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:51:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:51:59,564 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:52:09,244 INFO L227 lantSequenceWeakener]: Weakened 390 states. On average, predicates are now at 77.81% of their original sizes. [2019-09-09 18:52:09,244 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:52:09,311 INFO L420 sIntCurrentIteration]: We unified 392 AI predicates to 392 [2019-09-09 18:52:09,311 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:52:09,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:52:09,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:52:09,312 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:52:09,313 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:52:09,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:52:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:52:09,313 INFO L87 Difference]: Start difference. First operand 2012 states and 2615 transitions. Second operand 10 states. [2019-09-09 18:53:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:53:40,956 INFO L93 Difference]: Finished difference Result 2203 states and 2842 transitions. [2019-09-09 18:53:40,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-09 18:53:40,957 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 393 [2019-09-09 18:53:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:53:40,971 INFO L225 Difference]: With dead ends: 2203 [2019-09-09 18:53:40,972 INFO L226 Difference]: Without dead ends: 2203 [2019-09-09 18:53:40,972 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:53:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2019-09-09 18:53:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2198. [2019-09-09 18:53:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2198 states. [2019-09-09 18:53:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 2837 transitions. [2019-09-09 18:53:41,023 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 2837 transitions. Word has length 393 [2019-09-09 18:53:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:53:41,024 INFO L475 AbstractCegarLoop]: Abstraction has 2198 states and 2837 transitions. [2019-09-09 18:53:41,024 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:53:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 2837 transitions. [2019-09-09 18:53:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2019-09-09 18:53:41,036 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:53:41,036 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:53:41,036 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:53:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:53:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 756586798, now seen corresponding path program 1 times [2019-09-09 18:53:41,037 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:53:41,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:53:41,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:53:41,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:53:41,038 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:53:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:53:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 314 proven. 191 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-09-09 18:53:41,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:53:41,333 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:53:41,334 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 452 with the following transitions: [2019-09-09 18:53:41,334 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:53:41,337 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:53:41,338 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:54:00,944 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:54:00,945 INFO L272 AbstractInterpreter]: Visited 121 different actions 475 times. Merged at 6 different actions 21 times. Never widened. Performed 848 root evaluator evaluations with a maximum evaluation depth of 13. Performed 848 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 5 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:54:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:54:00,945 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:54:06,359 INFO L227 lantSequenceWeakener]: Weakened 448 states. On average, predicates are now at 77.76% of their original sizes. [2019-09-09 18:54:06,360 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:54:06,426 INFO L420 sIntCurrentIteration]: We unified 450 AI predicates to 450 [2019-09-09 18:54:06,427 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:54:06,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:54:06,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:54:06,427 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:54:06,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:54:06,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:54:06,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:54:06,429 INFO L87 Difference]: Start difference. First operand 2198 states and 2837 transitions. Second operand 10 states. [2019-09-09 18:54:42,558 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.