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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:06:36,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:06:36,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:06:36,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:06:36,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:06:36,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:06:36,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:06:36,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:06:36,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:06:36,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:06:36,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:06:36,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:06:36,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:06:36,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:06:36,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:06:36,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:06:36,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:06:36,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:06:36,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:06:36,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:06:36,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:06:36,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:06:36,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:06:36,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:06:36,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:06:36,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:06:36,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:06:36,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:06:36,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:06:36,511 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:06:36,511 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:06:36,512 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:06:36,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:06:36,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:06:36,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:06:36,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:06:36,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:06:36,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:06:36,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:06:36,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:06:36,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:06:36,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:06:36,560 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:06:36,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:06:36,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:06:36,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:06:36,562 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:06:36,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:06:36,563 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:06:36,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:06:36,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:06:36,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:06:36,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:06:36,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:06:36,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:06:36,564 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:06:36,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:06:36,565 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:06:36,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:06:36,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:06:36,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:06:36,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:06:36,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:06:36,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:06:36,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:06:36,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:06:36,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:06:36,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:06:36,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:06:36,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:06:36,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:06:36,914 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:06:36,937 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:06:36,940 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:06:36,941 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:06:36,942 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:06:36,942 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-13 20:06:37,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7637b9c2c/905212a64b5f44088f089ec0f71ef22d/FLAG3b3ad3cf8 [2019-10-13 20:06:37,513 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:06:37,514 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-13 20:06:37,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7637b9c2c/905212a64b5f44088f089ec0f71ef22d/FLAG3b3ad3cf8 [2019-10-13 20:06:37,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7637b9c2c/905212a64b5f44088f089ec0f71ef22d [2019-10-13 20:06:37,832 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:06:37,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:06:37,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:37,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:06:37,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:06:37,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:37" (1/1) ... [2019-10-13 20:06:37,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2bbd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:37, skipping insertion in model container [2019-10-13 20:06:37,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:37" (1/1) ... [2019-10-13 20:06:37,856 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:06:37,915 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:06:38,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:38,572 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:06:38,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:38,711 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:06:38,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38 WrapperNode [2019-10-13 20:06:38,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:38,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:06:38,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:06:38,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:06:38,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38" (1/1) ... [2019-10-13 20:06:38,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38" (1/1) ... [2019-10-13 20:06:38,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38" (1/1) ... [2019-10-13 20:06:38,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38" (1/1) ... [2019-10-13 20:06:38,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38" (1/1) ... [2019-10-13 20:06:38,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38" (1/1) ... [2019-10-13 20:06:38,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38" (1/1) ... [2019-10-13 20:06:38,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:06:38,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:06:38,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:06:38,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:06:38,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38" (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 [2019-10-13 20:06:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:06:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:06:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:06:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:06:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:06:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:06:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:06:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:06:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:06:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:06:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:06:40,444 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:06:40,445 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:06:40,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:40 BoogieIcfgContainer [2019-10-13 20:06:40,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:06:40,448 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:06:40,448 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:06:40,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:06:40,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:06:37" (1/3) ... [2019-10-13 20:06:40,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5050dda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:40, skipping insertion in model container [2019-10-13 20:06:40,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:38" (2/3) ... [2019-10-13 20:06:40,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5050dda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:40, skipping insertion in model container [2019-10-13 20:06:40,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:40" (3/3) ... [2019-10-13 20:06:40,462 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label14.c [2019-10-13 20:06:40,476 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:06:40,486 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:06:40,497 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:06:40,541 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:06:40,541 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:06:40,541 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:06:40,542 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:06:40,542 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:06:40,542 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:06:40,542 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:06:40,542 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:06:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:06:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 20:06:40,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:40,585 INFO L380 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] [2019-10-13 20:06:40,587 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:40,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2013862189, now seen corresponding path program 1 times [2019-10-13 20:06:40,601 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:40,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686122574] [2019-10-13 20:06:40,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:40,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:40,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:40,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686122574] [2019-10-13 20:06:40,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:40,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:06:40,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858863054] [2019-10-13 20:06:40,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:06:40,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:40,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:06:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:40,977 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-13 20:06:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:42,991 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-13 20:06:42,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:42,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-13 20:06:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:43,017 INFO L225 Difference]: With dead ends: 890 [2019-10-13 20:06:43,017 INFO L226 Difference]: Without dead ends: 554 [2019-10-13 20:06:43,026 INFO L600 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 [2019-10-13 20:06:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-13 20:06:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-13 20:06:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-13 20:06:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 806 transitions. [2019-10-13 20:06:43,131 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 806 transitions. Word has length 32 [2019-10-13 20:06:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:43,131 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 806 transitions. [2019-10-13 20:06:43,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 806 transitions. [2019-10-13 20:06:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 20:06:43,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:43,140 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:43,140 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:43,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1275083330, now seen corresponding path program 1 times [2019-10-13 20:06:43,141 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:43,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552001524] [2019-10-13 20:06:43,142 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:43,142 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:43,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:43,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552001524] [2019-10-13 20:06:43,412 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:43,413 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:06:43,413 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8801766] [2019-10-13 20:06:43,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:06:43,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:06:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:43,419 INFO L87 Difference]: Start difference. First operand 554 states and 806 transitions. Second operand 4 states. [2019-10-13 20:06:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:45,054 INFO L93 Difference]: Finished difference Result 2194 states and 3253 transitions. [2019-10-13 20:06:45,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:45,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-13 20:06:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:45,070 INFO L225 Difference]: With dead ends: 2194 [2019-10-13 20:06:45,070 INFO L226 Difference]: Without dead ends: 1646 [2019-10-13 20:06:45,074 INFO L600 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 [2019-10-13 20:06:45,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-13 20:06:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-13 20:06:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-13 20:06:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2329 transitions. [2019-10-13 20:06:45,200 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2329 transitions. Word has length 144 [2019-10-13 20:06:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:45,202 INFO L462 AbstractCegarLoop]: Abstraction has 1646 states and 2329 transitions. [2019-10-13 20:06:45,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2329 transitions. [2019-10-13 20:06:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-13 20:06:45,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:45,218 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:06:45,218 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:45,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1544408570, now seen corresponding path program 1 times [2019-10-13 20:06:45,219 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:45,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349704936] [2019-10-13 20:06:45,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:45,220 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:45,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:45,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349704936] [2019-10-13 20:06:45,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359969517] [2019-10-13 20:06:45,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:45,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:06:45,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:45,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 20:06:45,982 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:46,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:46,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:46,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:46,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:46,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:46,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 50 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:46,449 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:06:46,449 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2019-10-13 20:06:46,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770454984] [2019-10-13 20:06:46,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:46,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:46,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:46,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:06:46,452 INFO L87 Difference]: Start difference. First operand 1646 states and 2329 transitions. Second operand 5 states. [2019-10-13 20:06:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:47,930 INFO L93 Difference]: Finished difference Result 3878 states and 5438 transitions. [2019-10-13 20:06:47,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:06:47,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2019-10-13 20:06:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:47,945 INFO L225 Difference]: With dead ends: 3878 [2019-10-13 20:06:47,945 INFO L226 Difference]: Without dead ends: 2238 [2019-10-13 20:06:47,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:06:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2019-10-13 20:06:48,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1678. [2019-10-13 20:06:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1678 states. [2019-10-13 20:06:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2292 transitions. [2019-10-13 20:06:48,070 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2292 transitions. Word has length 217 [2019-10-13 20:06:48,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:48,071 INFO L462 AbstractCegarLoop]: Abstraction has 1678 states and 2292 transitions. [2019-10-13 20:06:48,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:48,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2292 transitions. [2019-10-13 20:06:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-13 20:06:48,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:48,080 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:06:48,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:48,295 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1655155903, now seen corresponding path program 1 times [2019-10-13 20:06:48,296 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:48,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809004386] [2019-10-13 20:06:48,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:48,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:48,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 20:06:48,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809004386] [2019-10-13 20:06:48,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713337702] [2019-10-13 20:06:48,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:48,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:06:48,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:48,737 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:48,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2059296278] [2019-10-13 20:06:48,885 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 245 [2019-10-13 20:06:48,937 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:06:48,937 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:06:57,801 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:06:57,803 INFO L272 AbstractInterpreter]: Visited 114 different actions 114 times. Never merged. Never widened. Performed 267 root evaluator evaluations with a maximum evaluation depth of 13. Performed 267 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:06:57,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:57,807 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:07:06,631 INFO L227 lantSequenceWeakener]: Weakened 225 states. On average, predicates are now at 77.68% of their original sizes. [2019-10-13 20:07:06,631 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:07:06,702 INFO L553 sIntCurrentIteration]: We unified 243 AI predicates to 243 [2019-10-13 20:07:06,702 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:07:06,703 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:07:06,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 5, 5] total 18 [2019-10-13 20:07:06,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312739828] [2019-10-13 20:07:06,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 20:07:06,705 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:06,706 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:07:06,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 20:07:06,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:07:06,706 INFO L87 Difference]: Start difference. First operand 1678 states and 2292 transitions. Second operand 10 states.