java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label50_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 18:53:59,508 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 18:53:59,510 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 18:53:59,527 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 18:53:59,527 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 18:53:59,529 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 18:53:59,530 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 18:53:59,533 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 18:53:59,536 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 18:53:59,538 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 18:53:59,539 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 18:53:59,540 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 18:53:59,543 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 18:53:59,544 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 18:53:59,545 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 18:53:59,548 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 18:53:59,549 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 18:53:59,557 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 18:53:59,559 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 18:53:59,564 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 18:53:59,567 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 18:53:59,568 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 18:53:59,571 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 18:53:59,585 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 18:53:59,616 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 18:53:59,617 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 18:53:59,617 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 18:53:59,618 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 18:53:59,619 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 18:53:59,619 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 18:53:59,619 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 18:53:59,619 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 18:53:59,620 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 18:53:59,620 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 18:53:59,620 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 18:53:59,620 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 18:53:59,622 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 18:53:59,622 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 18:53:59,622 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 18:53:59,622 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 18:53:59,622 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 18:53:59,623 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 18:53:59,623 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 18:53:59,623 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 18:53:59,623 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 18:53:59,623 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 18:53:59,623 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 18:53:59,626 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 18:53:59,626 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:53:59,626 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 18:53:59,626 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 18:53:59,627 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 18:53:59,627 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 18:53:59,627 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 18:53:59,627 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 18:53:59,627 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 18:53:59,627 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 18:53:59,628 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 18:53:59,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 18:53:59,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 18:53:59,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 18:53:59,733 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 18:53:59,733 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 18:53:59,734 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label50_false-unreach-call.c [2018-10-24 18:53:59,796 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f7cf30a88/70ba38a231374cd1b32831dfe59fc5fa/FLAG51a479b61 [2018-10-24 18:54:00,591 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 18:54:00,592 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label50_false-unreach-call.c [2018-10-24 18:54:00,622 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f7cf30a88/70ba38a231374cd1b32831dfe59fc5fa/FLAG51a479b61 [2018-10-24 18:54:00,643 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f7cf30a88/70ba38a231374cd1b32831dfe59fc5fa [2018-10-24 18:54:00,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 18:54:00,658 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 18:54:00,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 18:54:00,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 18:54:00,663 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 18:54:00,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:54:00" (1/1) ... [2018-10-24 18:54:00,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa2d024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:00, skipping insertion in model container [2018-10-24 18:54:00,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:54:00" (1/1) ... [2018-10-24 18:54:00,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 18:54:00,815 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 18:54:01,749 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:54:01,754 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 18:54:02,139 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:54:02,167 INFO L193 MainTranslator]: Completed translation [2018-10-24 18:54:02,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02 WrapperNode [2018-10-24 18:54:02,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 18:54:02,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 18:54:02,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 18:54:02,169 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 18:54:02,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... [2018-10-24 18:54:02,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... [2018-10-24 18:54:02,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 18:54:02,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 18:54:02,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 18:54:02,726 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 18:54:02,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... [2018-10-24 18:54:02,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... [2018-10-24 18:54:02,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... [2018-10-24 18:54:02,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... [2018-10-24 18:54:02,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... [2018-10-24 18:54:02,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... [2018-10-24 18:54:02,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... [2018-10-24 18:54:02,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 18:54:02,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 18:54:02,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 18:54:02,957 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 18:54:02,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-24 18:54:03,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 18:54:03,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 18:54:03,030 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 18:54:03,031 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 18:54:03,031 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 18:54:03,031 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 18:54:03,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 18:54:03,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 18:54:03,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 18:54:03,032 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 18:54:14,410 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 18:54:14,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:54:14 BoogieIcfgContainer [2018-10-24 18:54:14,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 18:54:14,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 18:54:14,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 18:54:14,419 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 18:54:14,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:54:00" (1/3) ... [2018-10-24 18:54:14,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2257d974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:54:14, skipping insertion in model container [2018-10-24 18:54:14,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:54:02" (2/3) ... [2018-10-24 18:54:14,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2257d974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:54:14, skipping insertion in model container [2018-10-24 18:54:14,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:54:14" (3/3) ... [2018-10-24 18:54:14,425 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label50_false-unreach-call.c [2018-10-24 18:54:14,436 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 18:54:14,452 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 18:54:14,473 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 18:54:14,535 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 18:54:14,536 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 18:54:14,536 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 18:54:14,536 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 18:54:14,536 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 18:54:14,537 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 18:54:14,537 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 18:54:14,537 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 18:54:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-24 18:54:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 18:54:14,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:54:14,586 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:54:14,588 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:54:14,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:54:14,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1651488332, now seen corresponding path program 1 times [2018-10-24 18:54:14,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:54:14,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:14,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:54:14,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:14,650 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:54:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:54:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:54:14,879 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:54:14,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 18:54:14,880 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:54:14,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 18:54:14,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 18:54:14,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:54:14,905 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 3 states. [2018-10-24 18:54:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:54:21,653 INFO L93 Difference]: Finished difference Result 1701 states and 3102 transitions. [2018-10-24 18:54:21,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 18:54:21,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-10-24 18:54:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:54:21,684 INFO L225 Difference]: With dead ends: 1701 [2018-10-24 18:54:21,684 INFO L226 Difference]: Without dead ends: 1095 [2018-10-24 18:54:21,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 18:54:21,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2018-10-24 18:54:21,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1079. [2018-10-24 18:54:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2018-10-24 18:54:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1867 transitions. [2018-10-24 18:54:21,832 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1867 transitions. Word has length 16 [2018-10-24 18:54:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:54:21,833 INFO L481 AbstractCegarLoop]: Abstraction has 1079 states and 1867 transitions. [2018-10-24 18:54:21,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 18:54:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1867 transitions. [2018-10-24 18:54:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-24 18:54:21,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:54:21,838 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:54:21,839 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:54:21,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:54:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1481706238, now seen corresponding path program 1 times [2018-10-24 18:54:21,839 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:54:21,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:21,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:54:21,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:21,842 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:54:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:54:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:54:22,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:54:22,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 18:54:22,138 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:54:22,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 18:54:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 18:54:22,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 18:54:22,143 INFO L87 Difference]: Start difference. First operand 1079 states and 1867 transitions. Second operand 5 states. [2018-10-24 18:54:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:54:31,076 INFO L93 Difference]: Finished difference Result 3083 states and 5458 transitions. [2018-10-24 18:54:31,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:54:31,086 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2018-10-24 18:54:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:54:31,106 INFO L225 Difference]: With dead ends: 3083 [2018-10-24 18:54:31,107 INFO L226 Difference]: Without dead ends: 2010 [2018-10-24 18:54:31,115 INFO L605 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 [2018-10-24 18:54:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2018-10-24 18:54:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1988. [2018-10-24 18:54:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1988 states. [2018-10-24 18:54:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3238 transitions. [2018-10-24 18:54:31,220 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3238 transitions. Word has length 86 [2018-10-24 18:54:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:54:31,221 INFO L481 AbstractCegarLoop]: Abstraction has 1988 states and 3238 transitions. [2018-10-24 18:54:31,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 18:54:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3238 transitions. [2018-10-24 18:54:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-24 18:54:31,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:54:31,225 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:54:31,226 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:54:31,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:54:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1412498702, now seen corresponding path program 1 times [2018-10-24 18:54:31,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:54:31,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:31,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:54:31,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:31,228 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:54:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:54:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:54:31,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:54:31,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:54:31,446 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:54:31,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:54:31,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:54:31,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:54:31,448 INFO L87 Difference]: Start difference. First operand 1988 states and 3238 transitions. Second operand 6 states. [2018-10-24 18:54:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:54:37,700 INFO L93 Difference]: Finished difference Result 4890 states and 7920 transitions. [2018-10-24 18:54:37,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:54:37,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2018-10-24 18:54:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:54:37,719 INFO L225 Difference]: With dead ends: 4890 [2018-10-24 18:54:37,719 INFO L226 Difference]: Without dead ends: 2908 [2018-10-24 18:54:37,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:54:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2018-10-24 18:54:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2898. [2018-10-24 18:54:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2898 states. [2018-10-24 18:54:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 3960 transitions. [2018-10-24 18:54:37,806 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 3960 transitions. Word has length 92 [2018-10-24 18:54:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:54:37,807 INFO L481 AbstractCegarLoop]: Abstraction has 2898 states and 3960 transitions. [2018-10-24 18:54:37,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:54:37,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 3960 transitions. [2018-10-24 18:54:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-24 18:54:37,811 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:54:37,812 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:54:37,812 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:54:37,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:54:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2006667847, now seen corresponding path program 1 times [2018-10-24 18:54:37,812 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:54:37,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:37,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:54:37,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:37,814 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:54:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:54:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:54:37,996 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:54:37,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:54:37,997 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:54:37,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:54:37,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:54:37,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:54:37,998 INFO L87 Difference]: Start difference. First operand 2898 states and 3960 transitions. Second operand 4 states. [2018-10-24 18:54:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:54:43,556 INFO L93 Difference]: Finished difference Result 5790 states and 7934 transitions. [2018-10-24 18:54:43,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:54:43,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2018-10-24 18:54:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:54:43,573 INFO L225 Difference]: With dead ends: 5790 [2018-10-24 18:54:43,574 INFO L226 Difference]: Without dead ends: 2898 [2018-10-24 18:54:43,586 INFO L605 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 [2018-10-24 18:54:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2018-10-24 18:54:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2898. [2018-10-24 18:54:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2898 states. [2018-10-24 18:54:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 3748 transitions. [2018-10-24 18:54:43,762 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 3748 transitions. Word has length 126 [2018-10-24 18:54:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:54:43,763 INFO L481 AbstractCegarLoop]: Abstraction has 2898 states and 3748 transitions. [2018-10-24 18:54:43,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:54:43,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 3748 transitions. [2018-10-24 18:54:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-24 18:54:43,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:54:43,767 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:54:43,767 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:54:43,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:54:43,768 INFO L82 PathProgramCache]: Analyzing trace with hash 83736320, now seen corresponding path program 1 times [2018-10-24 18:54:43,768 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:54:43,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:43,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:54:43,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:54:43,769 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:54:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:54:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-10-24 18:54:44,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:54:44,065 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:54:44,066 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 181 with the following transitions: [2018-10-24 18:54:44,068 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [738], [740], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-24 18:54:44,157 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:54:44,157 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:54:46,195 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:55:15,405 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:55:15,407 INFO L272 AbstractInterpreter]: Visited 96 different actions 466 times. Merged at 7 different actions 30 times. Widened at 1 different actions 1 times. Found 4 fixpoints after 3 different actions. Largest state had 26 variables. [2018-10-24 18:55:15,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:55:15,424 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:55:19,284 INFO L232 lantSequenceWeakener]: Weakened 32 states. On average, predicates are now at 76.57% of their original sizes. [2018-10-24 18:55:19,285 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:55:50,737 INFO L413 sIntCurrentIteration]: We have 179 unified AI predicates [2018-10-24 18:55:50,737 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:55:50,738 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:55:50,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [7] total 25 [2018-10-24 18:55:50,739 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:55:50,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 18:55:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 18:55:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-10-24 18:55:50,741 INFO L87 Difference]: Start difference. First operand 2898 states and 3748 transitions. Second operand 20 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown