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/Problem10_label26_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 18:05:49,534 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 18:05:49,537 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 18:05:49,550 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 18:05:49,550 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 18:05:49,552 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 18:05:49,553 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 18:05:49,555 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 18:05:49,557 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 18:05:49,558 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 18:05:49,559 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 18:05:49,559 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 18:05:49,560 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 18:05:49,561 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 18:05:49,562 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 18:05:49,563 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 18:05:49,564 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 18:05:49,566 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 18:05:49,568 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 18:05:49,570 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 18:05:49,571 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 18:05:49,573 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 18:05:49,575 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 18:05:49,590 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 18:05:49,592 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 18:05:49,593 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 18:05:49,593 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 18:05:49,594 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 18:05:49,627 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 18:05:49,629 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 18:05:49,630 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 18:05:49,630 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 18:05:49,630 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 18:05:49,630 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 18:05:49,630 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 18:05:49,631 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 18:05:49,631 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 18:05:49,632 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 18:05:49,632 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 18:05:49,632 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 18:05:49,633 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 18:05:49,633 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 18:05:49,633 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 18:05:49,633 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 18:05:49,635 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 18:05:49,636 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 18:05:49,636 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 18:05:49,636 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 18:05:49,636 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 18:05:49,637 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 18:05:49,637 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 18:05:49,637 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 18:05:49,637 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 18:05:49,637 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 18:05:49,638 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 18:05:49,638 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 18:05:49,638 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 18:05:49,638 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 18:05:49,638 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 18:05:49,638 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 18:05:49,639 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 18:05:49,639 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 18:05:49,692 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 18:05:49,705 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 18:05:49,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 18:05:49,711 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 18:05:49,711 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 18:05:49,712 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label26_false-unreach-call.c [2018-10-24 18:05:49,788 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/174ec8867/3c95676fc72a4406819a69b735dd8cd7/FLAG5f35a0f2c [2018-10-24 18:05:50,410 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 18:05:50,411 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label26_false-unreach-call.c [2018-10-24 18:05:50,425 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/174ec8867/3c95676fc72a4406819a69b735dd8cd7/FLAG5f35a0f2c [2018-10-24 18:05:50,446 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/174ec8867/3c95676fc72a4406819a69b735dd8cd7 [2018-10-24 18:05:50,458 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 18:05:50,459 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 18:05:50,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 18:05:50,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 18:05:50,465 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 18:05:50,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:05:50" (1/1) ... [2018-10-24 18:05:50,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11290b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:50, skipping insertion in model container [2018-10-24 18:05:50,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:05:50" (1/1) ... [2018-10-24 18:05:50,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 18:05:50,536 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 18:05:50,954 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:05:50,958 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 18:05:51,094 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 18:05:51,112 INFO L193 MainTranslator]: Completed translation [2018-10-24 18:05:51,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51 WrapperNode [2018-10-24 18:05:51,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 18:05:51,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 18:05:51,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 18:05:51,114 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 18:05:51,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (1/1) ... [2018-10-24 18:05:51,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (1/1) ... [2018-10-24 18:05:51,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 18:05:51,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 18:05:51,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 18:05:51,312 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 18:05:51,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (1/1) ... [2018-10-24 18:05:51,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (1/1) ... [2018-10-24 18:05:51,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (1/1) ... [2018-10-24 18:05:51,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (1/1) ... [2018-10-24 18:05:51,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (1/1) ... [2018-10-24 18:05:51,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (1/1) ... [2018-10-24 18:05:51,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (1/1) ... [2018-10-24 18:05:51,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 18:05:51,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 18:05:51,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 18:05:51,411 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 18:05:51,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (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 18:05:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 18:05:51,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 18:05:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 18:05:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 18:05:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 18:05:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 18:05:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 18:05:51,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 18:05:54,993 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 18:05:54,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:05:54 BoogieIcfgContainer [2018-10-24 18:05:54,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 18:05:55,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 18:05:55,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 18:05:55,004 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 18:05:55,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:05:50" (1/3) ... [2018-10-24 18:05:55,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424a1850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:05:55, skipping insertion in model container [2018-10-24 18:05:55,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:05:51" (2/3) ... [2018-10-24 18:05:55,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424a1850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:05:55, skipping insertion in model container [2018-10-24 18:05:55,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:05:54" (3/3) ... [2018-10-24 18:05:55,010 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10_label26_false-unreach-call.c [2018-10-24 18:05:55,021 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 18:05:55,029 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 18:05:55,046 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 18:05:55,096 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 18:05:55,097 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 18:05:55,097 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 18:05:55,097 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 18:05:55,097 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 18:05:55,098 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 18:05:55,098 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 18:05:55,098 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 18:05:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2018-10-24 18:05:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 18:05:55,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:05:55,137 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] [2018-10-24 18:05:55,140 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:05:55,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:05:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash 937477233, now seen corresponding path program 1 times [2018-10-24 18:05:55,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:05:55,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:05:55,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:05:55,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:05:55,201 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:05:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:05:55,627 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-24 18:05:55,634 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 18:05:55,636 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:05:55,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:05:55,638 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:05:55,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:05:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:05:55,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:05:55,665 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 4 states. [2018-10-24 18:05:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:05:58,885 INFO L93 Difference]: Finished difference Result 737 states and 1298 transitions. [2018-10-24 18:05:58,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:05:58,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-10-24 18:05:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:05:58,911 INFO L225 Difference]: With dead ends: 737 [2018-10-24 18:05:58,911 INFO L226 Difference]: Without dead ends: 515 [2018-10-24 18:05:58,920 INFO L605 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 [2018-10-24 18:05:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2018-10-24 18:05:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2018-10-24 18:05:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2018-10-24 18:05:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 848 transitions. [2018-10-24 18:05:59,044 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 848 transitions. Word has length 23 [2018-10-24 18:05:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:05:59,045 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 848 transitions. [2018-10-24 18:05:59,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:05:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 848 transitions. [2018-10-24 18:05:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-24 18:05:59,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:05:59,051 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:05:59,051 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:05:59,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:05:59,052 INFO L82 PathProgramCache]: Analyzing trace with hash 190361739, now seen corresponding path program 1 times [2018-10-24 18:05:59,052 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:05:59,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:05:59,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:05:59,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:05:59,054 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:05:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:05:59,465 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 18:05:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:05:59,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:05:59,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:05:59,519 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:05:59,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:05:59,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:05:59,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:05:59,522 INFO L87 Difference]: Start difference. First operand 515 states and 848 transitions. Second operand 6 states. [2018-10-24 18:06:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:06:02,464 INFO L93 Difference]: Finished difference Result 1863 states and 3251 transitions. [2018-10-24 18:06:02,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:06:02,465 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2018-10-24 18:06:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:06:02,484 INFO L225 Difference]: With dead ends: 1863 [2018-10-24 18:06:02,484 INFO L226 Difference]: Without dead ends: 1354 [2018-10-24 18:06:02,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 18:06:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2018-10-24 18:06:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1331. [2018-10-24 18:06:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-10-24 18:06:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2051 transitions. [2018-10-24 18:06:02,595 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2051 transitions. Word has length 98 [2018-10-24 18:06:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:06:02,596 INFO L481 AbstractCegarLoop]: Abstraction has 1331 states and 2051 transitions. [2018-10-24 18:06:02,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:06:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2051 transitions. [2018-10-24 18:06:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-24 18:06:02,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:06:02,600 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:06:02,601 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:06:02,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:06:02,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1323817903, now seen corresponding path program 1 times [2018-10-24 18:06:02,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:06:02,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:06:02,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:06:02,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:06:02,603 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:06:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:06:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:06:02,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:06:02,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:06:02,863 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:06:02,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:06:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:06:02,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:06:02,864 INFO L87 Difference]: Start difference. First operand 1331 states and 2051 transitions. Second operand 6 states. [2018-10-24 18:06:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:06:07,069 INFO L93 Difference]: Finished difference Result 3507 states and 5683 transitions. [2018-10-24 18:06:07,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:06:07,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-10-24 18:06:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:06:07,097 INFO L225 Difference]: With dead ends: 3507 [2018-10-24 18:06:07,097 INFO L226 Difference]: Without dead ends: 2182 [2018-10-24 18:06:07,110 INFO L605 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 [2018-10-24 18:06:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2018-10-24 18:06:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 2160. [2018-10-24 18:06:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2160 states. [2018-10-24 18:06:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 3172 transitions. [2018-10-24 18:06:07,201 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 3172 transitions. Word has length 100 [2018-10-24 18:06:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:06:07,202 INFO L481 AbstractCegarLoop]: Abstraction has 2160 states and 3172 transitions. [2018-10-24 18:06:07,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:06:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 3172 transitions. [2018-10-24 18:06:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-24 18:06:07,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:06:07,209 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 18:06:07,209 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:06:07,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:06:07,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1557164548, now seen corresponding path program 1 times [2018-10-24 18:06:07,210 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:06:07,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:06:07,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:06:07,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:06:07,213 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:06:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:06:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:06:07,409 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:06:07,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 18:06:07,409 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:06:07,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 18:06:07,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 18:06:07,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 18:06:07,411 INFO L87 Difference]: Start difference. First operand 2160 states and 3172 transitions. Second operand 4 states. [2018-10-24 18:06:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:06:08,863 INFO L93 Difference]: Finished difference Result 7295 states and 11297 transitions. [2018-10-24 18:06:08,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 18:06:08,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2018-10-24 18:06:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:06:08,891 INFO L225 Difference]: With dead ends: 7295 [2018-10-24 18:06:08,891 INFO L226 Difference]: Without dead ends: 3195 [2018-10-24 18:06:08,928 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 18:06:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3195 states. [2018-10-24 18:06:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3195 to 3193. [2018-10-24 18:06:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3193 states. [2018-10-24 18:06:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 4458 transitions. [2018-10-24 18:06:09,039 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 4458 transitions. Word has length 103 [2018-10-24 18:06:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:06:09,039 INFO L481 AbstractCegarLoop]: Abstraction has 3193 states and 4458 transitions. [2018-10-24 18:06:09,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 18:06:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 4458 transitions. [2018-10-24 18:06:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-24 18:06:09,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:06:09,046 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 18:06:09,046 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:06:09,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:06:09,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1720605675, now seen corresponding path program 1 times [2018-10-24 18:06:09,047 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:06:09,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:06:09,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:06:09,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:06:09,048 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:06:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:06:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 18:06:09,363 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 18:06:09,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 18:06:09,364 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:06:09,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 18:06:09,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 18:06:09,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 18:06:09,365 INFO L87 Difference]: Start difference. First operand 3193 states and 4458 transitions. Second operand 6 states. [2018-10-24 18:06:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 18:06:11,640 INFO L93 Difference]: Finished difference Result 7179 states and 10424 transitions. [2018-10-24 18:06:11,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 18:06:11,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 146 [2018-10-24 18:06:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 18:06:11,667 INFO L225 Difference]: With dead ends: 7179 [2018-10-24 18:06:11,668 INFO L226 Difference]: Without dead ends: 3992 [2018-10-24 18:06:11,688 INFO L605 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 [2018-10-24 18:06:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2018-10-24 18:06:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3939. [2018-10-24 18:06:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3939 states. [2018-10-24 18:06:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 5317 transitions. [2018-10-24 18:06:11,813 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 5317 transitions. Word has length 146 [2018-10-24 18:06:11,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 18:06:11,814 INFO L481 AbstractCegarLoop]: Abstraction has 3939 states and 5317 transitions. [2018-10-24 18:06:11,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 18:06:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 5317 transitions. [2018-10-24 18:06:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2018-10-24 18:06:11,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 18:06:11,836 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 18:06:11,837 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 18:06:11,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:06:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash -631018936, now seen corresponding path program 1 times [2018-10-24 18:06:11,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 18:06:11,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:06:11,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 18:06:11,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 18:06:11,839 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 18:06:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 18:06:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 112 proven. 76 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2018-10-24 18:06:12,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 18:06:12,342 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 18:06:12,344 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 336 with the following transitions: [2018-10-24 18:06:12,346 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [679], [683], [687], [691], [695], [699], [703], [706], [792], [796], [800], [806], [810], [812], [817], [818], [819], [821], [822] [2018-10-24 18:06:12,425 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 18:06:12,425 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 18:06:16,606 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 18:06:38,491 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 18:06:38,492 INFO L272 AbstractInterpreter]: Visited 132 different actions 643 times. Merged at 7 different actions 27 times. Never widened. Found 5 fixpoints after 1 different actions. Largest state had 24 variables. [2018-10-24 18:06:38,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 18:06:38,505 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 18:06:43,212 INFO L232 lantSequenceWeakener]: Weakened 26 states. On average, predicates are now at 76.14% of their original sizes. [2018-10-24 18:06:43,212 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 18:07:22,560 INFO L413 sIntCurrentIteration]: We have 334 unified AI predicates [2018-10-24 18:07:22,561 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 18:07:22,562 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 18:07:22,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [8] total 28 [2018-10-24 18:07:22,562 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 18:07:22,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 18:07:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 18:07:22,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-10-24 18:07:22,564 INFO L87 Difference]: Start difference. First operand 3939 states and 5317 transitions. Second operand 22 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown