java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label17_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:41:36,328 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:41:36,330 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:41:36,345 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:41:36,346 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:41:36,347 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:41:36,348 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:41:36,350 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:41:36,351 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:41:36,352 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:41:36,353 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:41:36,353 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:41:36,354 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:41:36,355 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:41:36,356 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:41:36,357 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:41:36,358 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:41:36,360 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:41:36,362 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:41:36,363 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:41:36,364 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:41:36,368 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:41:36,375 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 15:41:36,384 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:41:36,385 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:41:36,386 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:41:36,386 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:41:36,386 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 15:41:36,411 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:41:36,411 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:41:36,413 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:41:36,413 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:41:36,413 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:41:36,414 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:41:36,414 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:41:36,414 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:41:36,414 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:41:36,414 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:41:36,415 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:41:36,415 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:41:36,415 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:41:36,416 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:41:36,416 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:41:36,416 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:41:36,417 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:41:36,417 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:41:36,417 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:41:36,417 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:41:36,417 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:41:36,418 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:41:36,418 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:41:36,418 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:41:36,418 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:41:36,418 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:41:36,418 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:41:36,420 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:41:36,420 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:41:36,420 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:41:36,420 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:41:36,421 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:41:36,421 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:41:36,421 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:41:36,476 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:41:36,491 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:41:36,495 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:41:36,497 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:41:36,497 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:41:36,498 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label17_true-unreach-call.c [2018-11-07 15:41:36,564 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c10ef42/a43bb9434f0a4cbb8da32f8d4f8cec3e/FLAG8c20c102e [2018-11-07 15:41:37,295 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:41:37,296 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label17_true-unreach-call.c [2018-11-07 15:41:37,324 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c10ef42/a43bb9434f0a4cbb8da32f8d4f8cec3e/FLAG8c20c102e [2018-11-07 15:41:37,339 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c10ef42/a43bb9434f0a4cbb8da32f8d4f8cec3e [2018-11-07 15:41:37,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:41:37,354 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:41:37,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:41:37,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:41:37,361 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:41:37,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:41:37" (1/1) ... [2018-11-07 15:41:37,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c2de68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:37, skipping insertion in model container [2018-11-07 15:41:37,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:41:37" (1/1) ... [2018-11-07 15:41:37,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:41:37,514 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:41:38,542 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:41:38,547 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:41:39,009 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:41:39,040 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:41:39,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39 WrapperNode [2018-11-07 15:41:39,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:41:39,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:41:39,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:41:39,042 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:41:39,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (1/1) ... [2018-11-07 15:41:39,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (1/1) ... [2018-11-07 15:41:39,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:41:39,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:41:39,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:41:39,403 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:41:39,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (1/1) ... [2018-11-07 15:41:39,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (1/1) ... [2018-11-07 15:41:39,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (1/1) ... [2018-11-07 15:41:39,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (1/1) ... [2018-11-07 15:41:39,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (1/1) ... [2018-11-07 15:41:39,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (1/1) ... [2018-11-07 15:41:39,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (1/1) ... [2018-11-07 15:41:39,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:41:39,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:41:39,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:41:39,640 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:41:39,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (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 [2018-11-07 15:41:39,716 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:41:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:41:39,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:41:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 15:41:39,717 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 15:41:39,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:41:39,718 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:41:39,718 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:41:39,718 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:41:39,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:41:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:41:39,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:41:39,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:41:47,342 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:41:47,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:41:47 BoogieIcfgContainer [2018-11-07 15:41:47,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:41:47,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:41:47,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:41:47,348 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:41:47,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:41:37" (1/3) ... [2018-11-07 15:41:47,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dfc5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:41:47, skipping insertion in model container [2018-11-07 15:41:47,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:41:39" (2/3) ... [2018-11-07 15:41:47,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dfc5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:41:47, skipping insertion in model container [2018-11-07 15:41:47,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:41:47" (3/3) ... [2018-11-07 15:41:47,352 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label17_true-unreach-call.c [2018-11-07 15:41:47,362 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:41:47,371 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:41:47,384 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:41:47,434 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:41:47,434 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:41:47,434 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:41:47,435 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:41:47,435 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:41:47,435 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:41:47,435 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:41:47,436 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:41:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-11-07 15:41:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-07 15:41:47,499 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:41:47,500 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:41:47,502 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:41:47,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:41:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1618771172, now seen corresponding path program 1 times [2018-11-07 15:41:47,509 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:41:47,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:41:47,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:41:47,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:41:47,557 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:41:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:41:47,984 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 15:41:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:41:48,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:41:48,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:41:48,004 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:41:48,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:41:48,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:41:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:41:48,030 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 4 states. [2018-11-07 15:42:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:42:00,846 INFO L93 Difference]: Finished difference Result 2974 states and 5747 transitions. [2018-11-07 15:42:00,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:42:00,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2018-11-07 15:42:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:42:00,891 INFO L225 Difference]: With dead ends: 2974 [2018-11-07 15:42:00,892 INFO L226 Difference]: Without dead ends: 2193 [2018-11-07 15:42:00,909 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:42:00,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2018-11-07 15:42:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2193. [2018-11-07 15:42:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2193 states. [2018-11-07 15:42:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3677 transitions. [2018-11-07 15:42:01,125 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3677 transitions. Word has length 38 [2018-11-07 15:42:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:42:01,125 INFO L480 AbstractCegarLoop]: Abstraction has 2193 states and 3677 transitions. [2018-11-07 15:42:01,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:42:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3677 transitions. [2018-11-07 15:42:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-07 15:42:01,137 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:42:01,137 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:42:01,138 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:42:01,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:42:01,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1723944686, now seen corresponding path program 1 times [2018-11-07 15:42:01,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:42:01,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:01,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:42:01,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:01,141 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:42:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:42:01,469 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:42:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:42:01,686 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:42:01,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:42:01,686 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:42:01,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:42:01,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:42:01,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:42:01,689 INFO L87 Difference]: Start difference. First operand 2193 states and 3677 transitions. Second operand 5 states. [2018-11-07 15:42:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:42:15,863 INFO L93 Difference]: Finished difference Result 6600 states and 11248 transitions. [2018-11-07 15:42:15,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:42:15,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2018-11-07 15:42:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:42:15,894 INFO L225 Difference]: With dead ends: 6600 [2018-11-07 15:42:15,894 INFO L226 Difference]: Without dead ends: 4413 [2018-11-07 15:42:15,902 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:42:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2018-11-07 15:42:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 4378. [2018-11-07 15:42:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4378 states. [2018-11-07 15:42:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 6986 transitions. [2018-11-07 15:42:16,024 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 6986 transitions. Word has length 108 [2018-11-07 15:42:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:42:16,025 INFO L480 AbstractCegarLoop]: Abstraction has 4378 states and 6986 transitions. [2018-11-07 15:42:16,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:42:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 6986 transitions. [2018-11-07 15:42:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-07 15:42:16,029 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:42:16,030 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:42:16,030 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:42:16,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:42:16,030 INFO L82 PathProgramCache]: Analyzing trace with hash 455681307, now seen corresponding path program 1 times [2018-11-07 15:42:16,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:42:16,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:16,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:42:16,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:16,032 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:42:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:42:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:42:16,252 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:42:16,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:42:16,252 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:42:16,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:42:16,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:42:16,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:42:16,254 INFO L87 Difference]: Start difference. First operand 4378 states and 6986 transitions. Second operand 6 states. [2018-11-07 15:42:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:42:21,658 INFO L93 Difference]: Finished difference Result 11002 states and 17598 transitions. [2018-11-07 15:42:21,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:42:21,661 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2018-11-07 15:42:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:42:21,696 INFO L225 Difference]: With dead ends: 11002 [2018-11-07 15:42:21,697 INFO L226 Difference]: Without dead ends: 6630 [2018-11-07 15:42:21,711 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:42:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2018-11-07 15:42:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 6590. [2018-11-07 15:42:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6590 states. [2018-11-07 15:42:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 9022 transitions. [2018-11-07 15:42:21,896 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 9022 transitions. Word has length 135 [2018-11-07 15:42:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:42:21,900 INFO L480 AbstractCegarLoop]: Abstraction has 6590 states and 9022 transitions. [2018-11-07 15:42:21,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:42:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 9022 transitions. [2018-11-07 15:42:21,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-11-07 15:42:21,907 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:42:21,907 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:42:21,907 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:42:21,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:42:21,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1233353173, now seen corresponding path program 1 times [2018-11-07 15:42:21,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:42:21,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:21,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:42:21,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:21,914 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:42:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:42:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-07 15:42:22,205 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:42:22,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 15:42:22,205 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:42:22,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 15:42:22,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 15:42:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:42:22,207 INFO L87 Difference]: Start difference. First operand 6590 states and 9022 transitions. Second operand 4 states. [2018-11-07 15:42:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:42:29,243 INFO L93 Difference]: Finished difference Result 26041 states and 36985 transitions. [2018-11-07 15:42:29,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 15:42:29,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 215 [2018-11-07 15:42:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:42:29,328 INFO L225 Difference]: With dead ends: 26041 [2018-11-07 15:42:29,328 INFO L226 Difference]: Without dead ends: 19457 [2018-11-07 15:42:29,371 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 15:42:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19457 states. [2018-11-07 15:42:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19457 to 19457. [2018-11-07 15:42:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19457 states. [2018-11-07 15:42:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19457 states to 19457 states and 26052 transitions. [2018-11-07 15:42:29,832 INFO L78 Accepts]: Start accepts. Automaton has 19457 states and 26052 transitions. Word has length 215 [2018-11-07 15:42:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:42:29,833 INFO L480 AbstractCegarLoop]: Abstraction has 19457 states and 26052 transitions. [2018-11-07 15:42:29,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 15:42:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 19457 states and 26052 transitions. [2018-11-07 15:42:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-11-07 15:42:29,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:42:29,847 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 15:42:29,847 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:42:29,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:42:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1408112993, now seen corresponding path program 1 times [2018-11-07 15:42:29,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:42:29,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:29,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:42:29,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:42:29,849 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:42:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:42:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:42:30,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:42:30,359 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:42:30,360 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 258 with the following transitions: [2018-11-07 15:42:30,362 INFO L202 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1827], [1829], [1832], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2264], [2265], [2269], [2273], [2277], [2281], [2284], [2996], [3000], [3004], [3010], [3014], [3016], [3025], [3026], [3027], [3029], [3030] [2018-11-07 15:42:30,413 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:42:30,414 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:42:31,044 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:42:31,046 INFO L272 AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:42:31,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:42:31,076 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:42:31,793 INFO L227 lantSequenceWeakener]: Weakened 248 states. On average, predicates are now at 77.63% of their original sizes. [2018-11-07 15:42:31,793 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:42:32,102 INFO L415 sIntCurrentIteration]: We unified 256 AI predicates to 256 [2018-11-07 15:42:32,103 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:42:32,104 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:42:32,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 15:42:32,104 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:42:32,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 15:42:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 15:42:32,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 15:42:32,105 INFO L87 Difference]: Start difference. First operand 19457 states and 26052 transitions. Second operand 7 states. [2018-11-07 15:42:40,073 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown