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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:03:38,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:03:38,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:03:38,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:03:38,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:03:38,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:03:38,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:03:38,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:03:38,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:03:38,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:03:38,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:03:38,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:03:38,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:03:38,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:03:38,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:03:38,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:03:38,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:03:38,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:03:38,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:03:38,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:03:38,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:03:38,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:03:38,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:03:38,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:03:38,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:03:38,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:03:38,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:03:38,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:03:38,992 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 17:03:39,031 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:03:39,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:03:39,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:03:39,035 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:03:39,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:03:39,036 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:03:39,036 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:03:39,037 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:03:39,037 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:03:39,037 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:03:39,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:03:39,038 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:03:39,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:03:39,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:03:39,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:03:39,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:03:39,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:03:39,039 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:03:39,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:03:39,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:03:39,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:03:39,040 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:03:39,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:03:39,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:03:39,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:03:39,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:03:39,042 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:03:39,042 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:03:39,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:03:39,043 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:03:39,095 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:03:39,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:03:39,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:03:39,112 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:03:39,112 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:03:39,113 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label08.c [2019-09-09 17:03:39,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9c5a509/690c530593d84be285cf8236d260fec2/FLAG54dee3304 [2019-09-09 17:03:39,938 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:03:39,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label08.c [2019-09-09 17:03:39,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9c5a509/690c530593d84be285cf8236d260fec2/FLAG54dee3304 [2019-09-09 17:03:40,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa9c5a509/690c530593d84be285cf8236d260fec2 [2019-09-09 17:03:40,019 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:03:40,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:03:40,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:03:40,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:03:40,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:03:40,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:03:40" (1/1) ... [2019-09-09 17:03:40,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18409feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:40, skipping insertion in model container [2019-09-09 17:03:40,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:03:40" (1/1) ... [2019-09-09 17:03:40,039 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:03:40,219 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:03:41,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:03:41,769 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:03:42,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:03:42,532 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:03:42,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42 WrapperNode [2019-09-09 17:03:42,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:03:42,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:03:42,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:03:42,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:03:42,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42" (1/1) ... [2019-09-09 17:03:42,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42" (1/1) ... [2019-09-09 17:03:42,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42" (1/1) ... [2019-09-09 17:03:42,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42" (1/1) ... [2019-09-09 17:03:42,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42" (1/1) ... [2019-09-09 17:03:42,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42" (1/1) ... [2019-09-09 17:03:42,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42" (1/1) ... [2019-09-09 17:03:42,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:03:42,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:03:42,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:03:42,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:03:42,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42" (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 17:03:42,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:03:42,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:03:42,939 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:03:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:03:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:03:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:03:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:03:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:03:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:03:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:03:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:03:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:03:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:03:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:03:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:03:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:03:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:03:49,610 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:03:49,613 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:03:49,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:03:49 BoogieIcfgContainer [2019-09-09 17:03:49,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:03:49,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:03:49,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:03:49,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:03:49,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:03:40" (1/3) ... [2019-09-09 17:03:49,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bce8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:03:49, skipping insertion in model container [2019-09-09 17:03:49,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:03:42" (2/3) ... [2019-09-09 17:03:49,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bce8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:03:49, skipping insertion in model container [2019-09-09 17:03:49,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:03:49" (3/3) ... [2019-09-09 17:03:49,634 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label08.c [2019-09-09 17:03:49,647 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:03:49,659 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:03:49,679 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:03:49,713 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:03:49,713 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:03:49,713 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:03:49,714 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:03:49,714 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:03:49,714 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:03:49,714 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:03:49,714 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:03:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:03:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-09 17:03:49,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:03:49,781 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] [2019-09-09 17:03:49,783 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:03:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:03:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1724184079, now seen corresponding path program 1 times [2019-09-09 17:03:49,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:03:49,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:03:49,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:03:49,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:03:49,833 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:03:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:03:50,118 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 17:03:50,121 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:03:50,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:03:50,121 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:03:50,127 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:03:50,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:03:50,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:03:50,145 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:03:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:03:55,927 INFO L93 Difference]: Finished difference Result 1981 states and 3232 transitions. [2019-09-09 17:03:55,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:03:55,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2019-09-09 17:03:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:03:55,968 INFO L225 Difference]: With dead ends: 1981 [2019-09-09 17:03:55,968 INFO L226 Difference]: Without dead ends: 1913 [2019-09-09 17:03:55,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:03:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2019-09-09 17:03:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2019-09-09 17:03:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1912 states. [2019-09-09 17:03:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3141 transitions. [2019-09-09 17:03:56,140 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3141 transitions. Word has length 56 [2019-09-09 17:03:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:03:56,142 INFO L475 AbstractCegarLoop]: Abstraction has 1912 states and 3141 transitions. [2019-09-09 17:03:56,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:03:56,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3141 transitions. [2019-09-09 17:03:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-09 17:03:56,159 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:03:56,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:56,160 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:03:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:03:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1158943563, now seen corresponding path program 1 times [2019-09-09 17:03:56,161 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:03:56,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:03:56,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:03:56,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:03:56,164 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:03:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:03:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:03:56,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:03:56,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:03:56,426 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:03:56,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:03:56,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:03:56,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:03:56,429 INFO L87 Difference]: Start difference. First operand 1912 states and 3141 transitions. Second operand 5 states. [2019-09-09 17:04:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:04:05,884 INFO L93 Difference]: Finished difference Result 3681 states and 5546 transitions. [2019-09-09 17:04:05,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:04:05,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-09-09 17:04:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:04:05,912 INFO L225 Difference]: With dead ends: 3681 [2019-09-09 17:04:05,913 INFO L226 Difference]: Without dead ends: 3681 [2019-09-09 17:04:05,914 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 17:04:05,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2019-09-09 17:04:06,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3601. [2019-09-09 17:04:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3601 states. [2019-09-09 17:04:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5413 transitions. [2019-09-09 17:04:06,035 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5413 transitions. Word has length 131 [2019-09-09 17:04:06,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:04:06,038 INFO L475 AbstractCegarLoop]: Abstraction has 3601 states and 5413 transitions. [2019-09-09 17:04:06,038 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:04:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5413 transitions. [2019-09-09 17:04:06,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-09 17:04:06,043 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:04:06,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:06,044 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:04:06,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:04:06,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1065765487, now seen corresponding path program 1 times [2019-09-09 17:04:06,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:04:06,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:04:06,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:04:06,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:04:06,048 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:04:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:04:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:04:06,275 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:04:06,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:04:06,276 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:04:06,278 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:04:06,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:04:06,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:04:06,279 INFO L87 Difference]: Start difference. First operand 3601 states and 5413 transitions. Second operand 5 states. [2019-09-09 17:04:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:04:16,736 INFO L93 Difference]: Finished difference Result 7308 states and 10881 transitions. [2019-09-09 17:04:16,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:04:16,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-09-09 17:04:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:04:16,775 INFO L225 Difference]: With dead ends: 7308 [2019-09-09 17:04:16,775 INFO L226 Difference]: Without dead ends: 7308 [2019-09-09 17:04:16,776 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 17:04:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7308 states. [2019-09-09 17:04:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7308 to 7121. [2019-09-09 17:04:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7121 states. [2019-09-09 17:04:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 10497 transitions. [2019-09-09 17:04:16,973 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 10497 transitions. Word has length 145 [2019-09-09 17:04:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:04:16,973 INFO L475 AbstractCegarLoop]: Abstraction has 7121 states and 10497 transitions. [2019-09-09 17:04:16,973 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:04:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 10497 transitions. [2019-09-09 17:04:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-09 17:04:16,978 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:04:16,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:04:16,979 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:04:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:04:16,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1092495861, now seen corresponding path program 1 times [2019-09-09 17:04:16,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:04:16,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:04:16,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:04:16,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:04:16,981 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:04:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:04:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:04:17,214 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:04:17,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:04:17,214 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:04:17,215 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:04:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:04:17,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:04:17,216 INFO L87 Difference]: Start difference. First operand 7121 states and 10497 transitions. Second operand 6 states. [2019-09-09 17:04:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:04:25,235 INFO L93 Difference]: Finished difference Result 14335 states and 22341 transitions. [2019-09-09 17:04:25,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:04:25,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2019-09-09 17:04:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:04:25,304 INFO L225 Difference]: With dead ends: 14335 [2019-09-09 17:04:25,305 INFO L226 Difference]: Without dead ends: 14335 [2019-09-09 17:04:25,305 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 17:04:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14335 states. [2019-09-09 17:04:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14335 to 14126. [2019-09-09 17:04:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14126 states. [2019-09-09 17:04:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14126 states to 14126 states and 21301 transitions. [2019-09-09 17:04:25,657 INFO L78 Accepts]: Start accepts. Automaton has 14126 states and 21301 transitions. Word has length 163 [2019-09-09 17:04:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:04:25,660 INFO L475 AbstractCegarLoop]: Abstraction has 14126 states and 21301 transitions. [2019-09-09 17:04:25,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:04:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 14126 states and 21301 transitions. [2019-09-09 17:04:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-09-09 17:04:25,666 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:04:25,667 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, 2, 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] [2019-09-09 17:04:25,667 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:04:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:04:25,667 INFO L82 PathProgramCache]: Analyzing trace with hash 217514268, now seen corresponding path program 1 times [2019-09-09 17:04:25,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:04:25,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:04:25,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:04:25,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:04:25,669 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:04:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:04:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:04:25,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:04:25,865 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:04:25,866 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 235 with the following transitions: [2019-09-09 17:04:25,869 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], [2983], [2985], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3140], [3143], [3147], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3273], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:04:25,941 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:04:25,942 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:05:17,645 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:05:17,647 INFO L272 AbstractInterpreter]: Visited 107 different actions 107 times. Never merged. Never widened. Performed 148 root evaluator evaluations with a maximum evaluation depth of 17. Performed 148 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:05:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:05:17,652 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:06:06,900 INFO L227 lantSequenceWeakener]: Weakened 223 states. On average, predicates are now at 71.37% of their original sizes. [2019-09-09 17:06:06,900 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:06:06,951 INFO L420 sIntCurrentIteration]: We unified 233 AI predicates to 233 [2019-09-09 17:06:06,951 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:06:06,952 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:06:06,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:06:06,953 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:06:06,953 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:06:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:06:06,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:06:06,954 INFO L87 Difference]: Start difference. First operand 14126 states and 21301 transitions. Second operand 8 states. [2019-09-09 17:09:32,397 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.