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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:06:27,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:06:27,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:06:27,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:06:27,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:06:27,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:06:27,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:06:27,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:06:27,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:06:27,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:06:27,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:06:27,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:06:27,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:06:27,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:06:27,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:06:27,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:06:27,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:06:27,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:06:27,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:06:27,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:06:27,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:06:27,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:06:27,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:06:27,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:06:27,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:06:27,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:06:27,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:06:27,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:06:27,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:06:27,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:06:27,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:06:27,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:06:27,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:06:27,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:06:27,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:06:27,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:06:27,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:06:27,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:06:27,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:06:27,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:06:27,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:06:27,598 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 20:06:27,614 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:06:27,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:06:27,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:06:27,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:06:27,617 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:06:27,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:06:27,617 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:06:27,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:06:27,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:06:27,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:06:27,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:06:27,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:06:27,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:06:27,618 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:06:27,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:06:27,619 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:06:27,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:06:27,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:06:27,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:06:27,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:06:27,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:06:27,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:06:27,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:06:27,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:06:27,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:06:27,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:06:27,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:06:27,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:06:27,622 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 20:06:27,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:06:27,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:06:27,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:06:27,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:06:27,949 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:06:27,950 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-10-13 20:06:28,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eece19ac/2a557a43376343b09e3df57313f0663f/FLAGb6a7057c2 [2019-10-13 20:06:28,568 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:06:28,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-10-13 20:06:28,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eece19ac/2a557a43376343b09e3df57313f0663f/FLAGb6a7057c2 [2019-10-13 20:06:28,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eece19ac/2a557a43376343b09e3df57313f0663f [2019-10-13 20:06:28,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:06:28,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:06:28,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:28,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:06:28,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:06:28,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:28" (1/1) ... [2019-10-13 20:06:28,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e53d70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:28, skipping insertion in model container [2019-10-13 20:06:28,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:28" (1/1) ... [2019-10-13 20:06:28,903 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:06:28,967 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:06:29,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:29,568 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:06:29,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:29,729 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:06:29,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29 WrapperNode [2019-10-13 20:06:29,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:29,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:06:29,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:06:29,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:06:29,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29" (1/1) ... [2019-10-13 20:06:29,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29" (1/1) ... [2019-10-13 20:06:29,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29" (1/1) ... [2019-10-13 20:06:29,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29" (1/1) ... [2019-10-13 20:06:29,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29" (1/1) ... [2019-10-13 20:06:29,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29" (1/1) ... [2019-10-13 20:06:29,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29" (1/1) ... [2019-10-13 20:06:29,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:06:29,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:06:29,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:06:29,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:06:29,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29" (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 20:06:29,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:06:29,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:06:29,947 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:06:29,947 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:06:29,947 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:06:29,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:06:29,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:06:29,948 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:06:29,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:06:29,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:06:29,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:06:31,326 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:06:31,327 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:06:31,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:31 BoogieIcfgContainer [2019-10-13 20:06:31,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:06:31,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:06:31,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:06:31,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:06:31,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:06:28" (1/3) ... [2019-10-13 20:06:31,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a87541a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:31, skipping insertion in model container [2019-10-13 20:06:31,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:29" (2/3) ... [2019-10-13 20:06:31,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a87541a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:31, skipping insertion in model container [2019-10-13 20:06:31,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:31" (3/3) ... [2019-10-13 20:06:31,349 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label08.c [2019-10-13 20:06:31,359 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:06:31,370 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:06:31,382 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:06:31,424 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:06:31,424 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:06:31,424 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:06:31,425 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:06:31,425 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:06:31,425 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:06:31,425 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:06:31,425 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:06:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:06:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 20:06:31,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:31,457 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:31,459 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:31,465 INFO L82 PathProgramCache]: Analyzing trace with hash -597113733, now seen corresponding path program 1 times [2019-10-13 20:06:31,472 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:31,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026500809] [2019-10-13 20:06:31,473 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:31,473 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:31,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:31,707 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 20:06:31,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026500809] [2019-10-13 20:06:31,709 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:31,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:06:31,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156811492] [2019-10-13 20:06:31,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:06:31,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:31,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:06:31,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:31,740 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:06:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:32,870 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:06:32,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:06:32,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-13 20:06:32,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:32,895 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:06:32,895 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:06:32,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:06:33,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:06:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:06:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:06:33,041 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 18 [2019-10-13 20:06:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:33,042 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:06:33,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:06:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:06:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 20:06:33,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:33,050 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:06:33,051 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:33,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:33,052 INFO L82 PathProgramCache]: Analyzing trace with hash -866058331, now seen corresponding path program 1 times [2019-10-13 20:06:33,052 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:33,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768696636] [2019-10-13 20:06:33,052 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:33,052 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:33,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:33,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768696636] [2019-10-13 20:06:33,313 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:33,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:33,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489654705] [2019-10-13 20:06:33,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:33,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:33,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:33,317 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:06:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:34,795 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-10-13 20:06:34,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:34,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-10-13 20:06:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:34,807 INFO L225 Difference]: With dead ends: 1122 [2019-10-13 20:06:34,807 INFO L226 Difference]: Without dead ends: 756 [2019-10-13 20:06:34,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:06:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-10-13 20:06:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-10-13 20:06:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-13 20:06:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-10-13 20:06:34,868 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 87 [2019-10-13 20:06:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:34,869 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-10-13 20:06:34,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:06:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-10-13 20:06:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 20:06:34,872 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:34,873 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:06:34,873 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1300336130, now seen corresponding path program 1 times [2019-10-13 20:06:34,874 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:34,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094085813] [2019-10-13 20:06:34,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:34,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:34,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:34,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094085813] [2019-10-13 20:06:34,980 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:34,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:06:34,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052414634] [2019-10-13 20:06:34,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:34,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:34,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:34,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:06:34,982 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-10-13 20:06:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:36,296 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-10-13 20:06:36,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:36,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2019-10-13 20:06:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:36,308 INFO L225 Difference]: With dead ends: 1904 [2019-10-13 20:06:36,308 INFO L226 Difference]: Without dead ends: 1158 [2019-10-13 20:06:36,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:06:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-10-13 20:06:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-10-13 20:06:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-10-13 20:06:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-10-13 20:06:36,362 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 88 [2019-10-13 20:06:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:36,362 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-10-13 20:06:36,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-10-13 20:06:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 20:06:36,365 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:36,365 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:06:36,365 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:36,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:36,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1278217766, now seen corresponding path program 1 times [2019-10-13 20:06:36,366 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:36,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537586325] [2019-10-13 20:06:36,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:36,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:36,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:36,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537586325] [2019-10-13 20:06:36,506 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:36,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:06:36,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286830629] [2019-10-13 20:06:36,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:36,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:36,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:36,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:06:36,508 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-10-13 20:06:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:37,772 INFO L93 Difference]: Finished difference Result 2880 states and 4162 transitions. [2019-10-13 20:06:37,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:06:37,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2019-10-13 20:06:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:37,784 INFO L225 Difference]: With dead ends: 2880 [2019-10-13 20:06:37,784 INFO L226 Difference]: Without dead ends: 1748 [2019-10-13 20:06:37,788 INFO L600 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 [2019-10-13 20:06:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2019-10-13 20:06:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1326. [2019-10-13 20:06:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2019-10-13 20:06:37,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1863 transitions. [2019-10-13 20:06:37,850 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1863 transitions. Word has length 90 [2019-10-13 20:06:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:37,851 INFO L462 AbstractCegarLoop]: Abstraction has 1326 states and 1863 transitions. [2019-10-13 20:06:37,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1863 transitions. [2019-10-13 20:06:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 20:06:37,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:37,862 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:37,862 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:37,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1132692271, now seen corresponding path program 1 times [2019-10-13 20:06:37,863 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:37,864 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820812985] [2019-10-13 20:06:37,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:37,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:37,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:06:38,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820812985] [2019-10-13 20:06:38,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:38,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:06:38,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391604777] [2019-10-13 20:06:38,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:06:38,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:06:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:38,036 INFO L87 Difference]: Start difference. First operand 1326 states and 1863 transitions. Second operand 4 states. [2019-10-13 20:06:39,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:39,482 INFO L93 Difference]: Finished difference Result 4128 states and 5824 transitions. [2019-10-13 20:06:39,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:39,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-13 20:06:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:39,499 INFO L225 Difference]: With dead ends: 4128 [2019-10-13 20:06:39,499 INFO L226 Difference]: Without dead ends: 2808 [2019-10-13 20:06:39,504 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 20:06:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2019-10-13 20:06:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 1712. [2019-10-13 20:06:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1712 states. [2019-10-13 20:06:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2319 transitions. [2019-10-13 20:06:39,571 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2319 transitions. Word has length 174 [2019-10-13 20:06:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:39,572 INFO L462 AbstractCegarLoop]: Abstraction has 1712 states and 2319 transitions. [2019-10-13 20:06:39,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2319 transitions. [2019-10-13 20:06:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 20:06:39,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:39,579 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 20:06:39,579 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1658054871, now seen corresponding path program 1 times [2019-10-13 20:06:39,580 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:39,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360750495] [2019-10-13 20:06:39,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:39,581 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:39,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-13 20:06:39,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360750495] [2019-10-13 20:06:39,803 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:39,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:06:39,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088817154] [2019-10-13 20:06:39,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:06:39,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:06:39,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:39,805 INFO L87 Difference]: Start difference. First operand 1712 states and 2319 transitions. Second operand 3 states. [2019-10-13 20:06:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:40,720 INFO L93 Difference]: Finished difference Result 4350 states and 6015 transitions. [2019-10-13 20:06:40,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:06:40,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-10-13 20:06:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:40,740 INFO L225 Difference]: With dead ends: 4350 [2019-10-13 20:06:40,740 INFO L226 Difference]: Without dead ends: 2644 [2019-10-13 20:06:40,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2019-10-13 20:06:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2456. [2019-10-13 20:06:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2019-10-13 20:06:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3243 transitions. [2019-10-13 20:06:40,820 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3243 transitions. Word has length 234 [2019-10-13 20:06:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:40,821 INFO L462 AbstractCegarLoop]: Abstraction has 2456 states and 3243 transitions. [2019-10-13 20:06:40,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:06:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3243 transitions. [2019-10-13 20:06:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-13 20:06:40,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:40,838 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 20:06:40,839 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash -121492162, now seen corresponding path program 1 times [2019-10-13 20:06:40,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:40,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565972128] [2019-10-13 20:06:40,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:40,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:40,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:42,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565972128] [2019-10-13 20:06:42,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184899040] [2019-10-13 20:06:42,097 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 20:06:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:42,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:06:42,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:42,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 20:06:42,428 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:42,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:42,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:42,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:42,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:42,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:42,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:43,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:06:43,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2019-10-13 20:06:43,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732038593] [2019-10-13 20:06:43,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:43,033 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-10-13 20:06:43,033 INFO L87 Difference]: Start difference. First operand 2456 states and 3243 transitions. Second operand 5 states. [2019-10-13 20:06:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:44,471 INFO L93 Difference]: Finished difference Result 4928 states and 6538 transitions. [2019-10-13 20:06:44,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:06:44,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-10-13 20:06:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:44,485 INFO L225 Difference]: With dead ends: 4928 [2019-10-13 20:06:44,485 INFO L226 Difference]: Without dead ends: 2478 [2019-10-13 20:06:44,492 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 513 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-10-13 20:06:44,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2019-10-13 20:06:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2462. [2019-10-13 20:06:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2462 states. [2019-10-13 20:06:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3228 transitions. [2019-10-13 20:06:44,560 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3228 transitions. Word has length 259 [2019-10-13 20:06:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:44,561 INFO L462 AbstractCegarLoop]: Abstraction has 2462 states and 3228 transitions. [2019-10-13 20:06:44,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:44,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3228 transitions. [2019-10-13 20:06:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-10-13 20:06:44,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:44,570 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 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 20:06:44,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:44,780 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1137249175, now seen corresponding path program 1 times [2019-10-13 20:06:44,780 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:44,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673444509] [2019-10-13 20:06:44,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:44,781 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:44,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:45,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673444509] [2019-10-13 20:06:45,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584036366] [2019-10-13 20:06:45,841 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 20:06:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:45,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:06:45,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:46,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:06:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 248 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 20:06:46,280 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:46,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:06:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 41 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:46,870 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1387541236] [2019-10-13 20:06:46,877 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 344 [2019-10-13 20:06:46,935 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:06:46,935 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:04,964 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:04,967 INFO L272 AbstractInterpreter]: Visited 138 different actions 271 times. Merged at 4 different actions 5 times. Never widened. Performed 536 root evaluator evaluations with a maximum evaluation depth of 13. Performed 536 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:07:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:04,971 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates