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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:55:47,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:55:47,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:55:47,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 16:55:47,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 16:55:47,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 16:55:47,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 16:55:47,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 16:55:47,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 16:55:47,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 16:55:47,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 16:55:47,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 16:55:47,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 16:55:47,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 16:55:47,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 16:55:47,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 16:55:47,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 16:55:47,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:55:47,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:55:47,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:55:47,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:55:47,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:55:47,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:55:47,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:55:47,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:55:47,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:55:47,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:55:47,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:55:47,186 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 16:55:47,202 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:55:47,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:55:47,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:55:47,203 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:55:47,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:55:47,204 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:55:47,204 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:55:47,204 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:55:47,204 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:55:47,204 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:55:47,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:55:47,205 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:55:47,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:55:47,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:55:47,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:55:47,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:55:47,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:55:47,206 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:55:47,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:55:47,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:55:47,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:55:47,207 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:55:47,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:55:47,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:55:47,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:55:47,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:55:47,208 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:55:47,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:55:47,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:55:47,209 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:55:47,237 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:55:47,250 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:55:47,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:55:47,255 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:55:47,255 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:55:47,256 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label02.c [2019-09-09 16:55:47,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ceed4e6c/f2f2766f6d0147f882c6d2064926916c/FLAGef5701d9c [2019-09-09 16:55:48,112 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:55:48,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label02.c [2019-09-09 16:55:48,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ceed4e6c/f2f2766f6d0147f882c6d2064926916c/FLAGef5701d9c [2019-09-09 16:55:48,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ceed4e6c/f2f2766f6d0147f882c6d2064926916c [2019-09-09 16:55:48,663 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:55:48,664 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:55:48,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:55:48,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:55:48,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:55:48,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:55:48" (1/1) ... [2019-09-09 16:55:48,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c983d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:48, skipping insertion in model container [2019-09-09 16:55:48,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:55:48" (1/1) ... [2019-09-09 16:55:48,681 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:55:48,870 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:55:50,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:55:50,514 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:55:51,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:55:51,286 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:55:51,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51 WrapperNode [2019-09-09 16:55:51,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:55:51,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:55:51,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:55:51,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:55:51,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51" (1/1) ... [2019-09-09 16:55:51,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51" (1/1) ... [2019-09-09 16:55:51,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51" (1/1) ... [2019-09-09 16:55:51,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51" (1/1) ... [2019-09-09 16:55:51,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51" (1/1) ... [2019-09-09 16:55:51,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51" (1/1) ... [2019-09-09 16:55:51,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51" (1/1) ... [2019-09-09 16:55:51,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:55:51,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:55:51,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:55:51,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:55:51,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51" (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 16:55:51,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:55:51,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:55:51,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:55:51,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:55:51,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:55:51,733 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:55:51,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:55:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:55:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:55:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:55:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:55:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:55:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:55:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:55:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:55:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:55:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:55:58,611 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:55:58,611 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:55:58,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:55:58 BoogieIcfgContainer [2019-09-09 16:55:58,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:55:58,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:55:58,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:55:58,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:55:58,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:55:48" (1/3) ... [2019-09-09 16:55:58,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21984a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:55:58, skipping insertion in model container [2019-09-09 16:55:58,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:55:51" (2/3) ... [2019-09-09 16:55:58,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21984a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:55:58, skipping insertion in model container [2019-09-09 16:55:58,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:55:58" (3/3) ... [2019-09-09 16:55:58,623 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label02.c [2019-09-09 16:55:58,634 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:55:58,644 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:55:58,662 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:55:58,690 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:55:58,691 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:55:58,691 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:55:58,691 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:55:58,691 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:55:58,691 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:55:58,691 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:55:58,692 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:55:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 16:55:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-09 16:55:58,742 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:55:58,743 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] [2019-09-09 16:55:58,745 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:55:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:55:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2063873488, now seen corresponding path program 1 times [2019-09-09 16:55:58,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:55:58,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:55:58,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:55:58,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:55:58,810 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:55:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:55:59,082 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 16:55:59,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:55:59,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:55:59,085 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:55:59,091 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:55:59,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:55:59,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:55:59,109 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-09-09 16:56:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:56:10,145 INFO L93 Difference]: Finished difference Result 2988 states and 5265 transitions. [2019-09-09 16:56:10,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:56:10,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-09-09 16:56:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:56:10,193 INFO L225 Difference]: With dead ends: 2988 [2019-09-09 16:56:10,193 INFO L226 Difference]: Without dead ends: 2901 [2019-09-09 16:56:10,196 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 16:56:10,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2019-09-09 16:56:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2771. [2019-09-09 16:56:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2771 states. [2019-09-09 16:56:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4860 transitions. [2019-09-09 16:56:10,404 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4860 transitions. Word has length 45 [2019-09-09 16:56:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:56:10,405 INFO L475 AbstractCegarLoop]: Abstraction has 2771 states and 4860 transitions. [2019-09-09 16:56:10,405 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:56:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4860 transitions. [2019-09-09 16:56:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-09 16:56:10,411 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:56:10,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:56:10,412 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:56:10,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:56:10,412 INFO L82 PathProgramCache]: Analyzing trace with hash 648999256, now seen corresponding path program 1 times [2019-09-09 16:56:10,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:56:10,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:56:10,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:56:10,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:56:10,414 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:56:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:56:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:56:10,704 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:56:10,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:56:10,704 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:56:10,709 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:56:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:56:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:56:10,711 INFO L87 Difference]: Start difference. First operand 2771 states and 4860 transitions. Second operand 6 states. [2019-09-09 16:56:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:56:19,544 INFO L93 Difference]: Finished difference Result 5346 states and 9271 transitions. [2019-09-09 16:56:19,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:56:19,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2019-09-09 16:56:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:56:19,578 INFO L225 Difference]: With dead ends: 5346 [2019-09-09 16:56:19,578 INFO L226 Difference]: Without dead ends: 5346 [2019-09-09 16:56:19,579 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 16:56:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2019-09-09 16:56:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 5286. [2019-09-09 16:56:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5286 states. [2019-09-09 16:56:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5286 states to 5286 states and 9118 transitions. [2019-09-09 16:56:19,728 INFO L78 Accepts]: Start accepts. Automaton has 5286 states and 9118 transitions. Word has length 115 [2019-09-09 16:56:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:56:19,729 INFO L475 AbstractCegarLoop]: Abstraction has 5286 states and 9118 transitions. [2019-09-09 16:56:19,729 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:56:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 5286 states and 9118 transitions. [2019-09-09 16:56:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-09 16:56:19,732 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:56:19,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:56:19,733 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:56:19,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:56:19,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1423326351, now seen corresponding path program 1 times [2019-09-09 16:56:19,734 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:56:19,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:56:19,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:56:19,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:56:19,735 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:56:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:56:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:56:19,875 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:56:19,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:56:19,875 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:56:19,876 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:56:19,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:56:19,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:56:19,877 INFO L87 Difference]: Start difference. First operand 5286 states and 9118 transitions. Second operand 6 states. [2019-09-09 16:56:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:56:27,933 INFO L93 Difference]: Finished difference Result 7919 states and 13116 transitions. [2019-09-09 16:56:27,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:56:27,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2019-09-09 16:56:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:56:27,980 INFO L225 Difference]: With dead ends: 7919 [2019-09-09 16:56:27,981 INFO L226 Difference]: Without dead ends: 7919 [2019-09-09 16:56:27,982 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 16:56:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7919 states. [2019-09-09 16:56:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7919 to 7853. [2019-09-09 16:56:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7853 states. [2019-09-09 16:56:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7853 states to 7853 states and 12900 transitions. [2019-09-09 16:56:28,218 INFO L78 Accepts]: Start accepts. Automaton has 7853 states and 12900 transitions. Word has length 118 [2019-09-09 16:56:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:56:28,221 INFO L475 AbstractCegarLoop]: Abstraction has 7853 states and 12900 transitions. [2019-09-09 16:56:28,221 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:56:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7853 states and 12900 transitions. [2019-09-09 16:56:28,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-09 16:56:28,226 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:56:28,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:56:28,226 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:56:28,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:56:28,227 INFO L82 PathProgramCache]: Analyzing trace with hash 944737797, now seen corresponding path program 1 times [2019-09-09 16:56:28,227 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:56:28,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:56:28,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:56:28,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:56:28,228 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:56:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:56:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:56:28,407 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:56:28,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 16:56:28,407 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:56:28,408 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 16:56:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 16:56:28,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 16:56:28,409 INFO L87 Difference]: Start difference. First operand 7853 states and 12900 transitions. Second operand 5 states. [2019-09-09 16:56:36,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:56:36,809 INFO L93 Difference]: Finished difference Result 16038 states and 26043 transitions. [2019-09-09 16:56:36,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 16:56:36,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2019-09-09 16:56:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:56:36,904 INFO L225 Difference]: With dead ends: 16038 [2019-09-09 16:56:36,904 INFO L226 Difference]: Without dead ends: 16038 [2019-09-09 16:56:36,906 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 16:56:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16038 states. [2019-09-09 16:56:37,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16038 to 15790. [2019-09-09 16:56:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15790 states. [2019-09-09 16:56:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15790 states to 15790 states and 24782 transitions. [2019-09-09 16:56:37,369 INFO L78 Accepts]: Start accepts. Automaton has 15790 states and 24782 transitions. Word has length 128 [2019-09-09 16:56:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:56:37,370 INFO L475 AbstractCegarLoop]: Abstraction has 15790 states and 24782 transitions. [2019-09-09 16:56:37,370 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 16:56:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 15790 states and 24782 transitions. [2019-09-09 16:56:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-09 16:56:37,373 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:56:37,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:56:37,373 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:56:37,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:56:37,374 INFO L82 PathProgramCache]: Analyzing trace with hash -537370007, now seen corresponding path program 1 times [2019-09-09 16:56:37,374 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:56:37,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:56:37,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:56:37,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:56:37,376 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:56:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:56:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:56:37,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:56:37,578 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:56:37,580 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2019-09-09 16:56:37,583 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], [2895], [2897], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3265], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 16:56:37,638 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:56:37,639 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 16:59:11,178 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 16:59:11,181 INFO L272 AbstractInterpreter]: Visited 107 different actions 208 times. Merged at 4 different actions 4 times. Never widened. Performed 406 root evaluator evaluations with a maximum evaluation depth of 17. Performed 406 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 16:59:11,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:59:11,185 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:00:40,858 INFO L227 lantSequenceWeakener]: Weakened 142 states. On average, predicates are now at 71.37% of their original sizes. [2019-09-09 17:00:40,858 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:00:40,930 INFO L420 sIntCurrentIteration]: We unified 144 AI predicates to 144 [2019-09-09 17:00:40,931 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:00:40,932 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:00:40,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 17:00:40,933 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:00:40,934 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 17:00:40,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 17:00:40,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 17:00:40,934 INFO L87 Difference]: Start difference. First operand 15790 states and 24782 transitions. Second operand 10 states. [2019-09-09 17:05:15,048 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.