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-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label34_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 12:05:10,898 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 12:05:10,904 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 12:05:10,922 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 12:05:10,923 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 12:05:10,925 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 12:05:10,926 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 12:05:10,928 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 12:05:10,931 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 12:05:10,933 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 12:05:10,940 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 12:05:10,941 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 12:05:10,942 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 12:05:10,943 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 12:05:10,944 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 12:05:10,945 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 12:05:10,945 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 12:05:10,947 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 12:05:10,949 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 12:05:10,950 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 12:05:10,951 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 12:05:10,953 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 12:05:10,955 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 12:05:10,963 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 12:05:10,978 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 12:05:10,978 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 12:05:10,979 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 12:05:10,980 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 12:05:10,980 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 12:05:10,980 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 12:05:10,980 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 12:05:10,980 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 12:05:10,980 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 12:05:10,981 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 12:05:10,981 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 12:05:10,981 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 12:05:10,982 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 12:05:10,982 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 12:05:10,982 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 12:05:10,982 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 12:05:10,982 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 12:05:10,983 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 12:05:10,983 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 12:05:10,983 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 12:05:10,983 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 12:05:10,983 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 12:05:10,983 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 12:05:10,984 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 12:05:10,984 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 12:05:10,984 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 12:05:10,984 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 12:05:10,985 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 12:05:10,985 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 12:05:10,985 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 12:05:10,985 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 12:05:10,985 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 12:05:10,985 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 12:05:10,986 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 12:05:11,034 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 12:05:11,047 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 12:05:11,051 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 12:05:11,052 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 12:05:11,053 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 12:05:11,053 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label34_false-unreach-call.c [2018-10-27 12:05:11,111 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/072ee1b99/c11c556e7a1646078a2e7b7d5487f226/FLAG2c79e4b0d [2018-10-27 12:05:11,850 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 12:05:11,851 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label34_false-unreach-call.c [2018-10-27 12:05:11,877 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/072ee1b99/c11c556e7a1646078a2e7b7d5487f226/FLAG2c79e4b0d [2018-10-27 12:05:11,894 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/072ee1b99/c11c556e7a1646078a2e7b7d5487f226 [2018-10-27 12:05:11,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 12:05:11,911 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 12:05:11,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 12:05:11,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 12:05:11,922 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 12:05:11,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:05:11" (1/1) ... [2018-10-27 12:05:11,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d607cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:11, skipping insertion in model container [2018-10-27 12:05:11,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:05:11" (1/1) ... [2018-10-27 12:05:11,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 12:05:12,086 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 12:05:13,227 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:05:13,232 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 12:05:13,674 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:05:13,706 INFO L193 MainTranslator]: Completed translation [2018-10-27 12:05:13,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13 WrapperNode [2018-10-27 12:05:13,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 12:05:13,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 12:05:13,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 12:05:13,709 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 12:05:13,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (1/1) ... [2018-10-27 12:05:13,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (1/1) ... [2018-10-27 12:05:14,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 12:05:14,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 12:05:14,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 12:05:14,127 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 12:05:14,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (1/1) ... [2018-10-27 12:05:14,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (1/1) ... [2018-10-27 12:05:14,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (1/1) ... [2018-10-27 12:05:14,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (1/1) ... [2018-10-27 12:05:14,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (1/1) ... [2018-10-27 12:05:14,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (1/1) ... [2018-10-27 12:05:14,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (1/1) ... [2018-10-27 12:05:14,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 12:05:14,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 12:05:14,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 12:05:14,340 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 12:05:14,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (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 [2018-10-27 12:05:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 12:05:14,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 12:05:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 12:05:14,412 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 12:05:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 12:05:14,412 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 12:05:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 12:05:14,413 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 12:05:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 12:05:14,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 12:05:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 12:05:14,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 12:05:23,370 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 12:05:23,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:05:23 BoogieIcfgContainer [2018-10-27 12:05:23,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 12:05:23,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 12:05:23,375 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 12:05:23,379 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 12:05:23,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:05:11" (1/3) ... [2018-10-27 12:05:23,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b40e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:05:23, skipping insertion in model container [2018-10-27 12:05:23,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:13" (2/3) ... [2018-10-27 12:05:23,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b40e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:05:23, skipping insertion in model container [2018-10-27 12:05:23,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:05:23" (3/3) ... [2018-10-27 12:05:23,382 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label34_false-unreach-call.c [2018-10-27 12:05:23,393 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 12:05:23,403 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 12:05:23,424 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 12:05:23,471 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 12:05:23,471 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 12:05:23,472 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 12:05:23,472 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 12:05:23,472 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 12:05:23,472 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 12:05:23,472 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 12:05:23,473 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 12:05:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-10-27 12:05:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-27 12:05:23,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:05:23,521 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:05:23,524 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:05:23,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:05:23,531 INFO L82 PathProgramCache]: Analyzing trace with hash -81823740, now seen corresponding path program 1 times [2018-10-27 12:05:23,534 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:05:23,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:23,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:05:23,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:23,594 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:05:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:05:23,900 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 12:05:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:05:23,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:05:23,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 12:05:23,993 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:05:23,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 12:05:24,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 12:05:24,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:05:24,020 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 3 states. [2018-10-27 12:05:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:05:30,405 INFO L93 Difference]: Finished difference Result 2251 states and 4322 transitions. [2018-10-27 12:05:30,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 12:05:30,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-10-27 12:05:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:05:30,448 INFO L225 Difference]: With dead ends: 2251 [2018-10-27 12:05:30,448 INFO L226 Difference]: Without dead ends: 1474 [2018-10-27 12:05:30,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 12:05:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2018-10-27 12:05:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2018-10-27 12:05:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2018-10-27 12:05:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2721 transitions. [2018-10-27 12:05:30,612 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2721 transitions. Word has length 14 [2018-10-27 12:05:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:05:30,613 INFO L481 AbstractCegarLoop]: Abstraction has 1474 states and 2721 transitions. [2018-10-27 12:05:30,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 12:05:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2721 transitions. [2018-10-27 12:05:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-27 12:05:30,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:05:30,618 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 12:05:30,619 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:05:30,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:05:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1421617358, now seen corresponding path program 1 times [2018-10-27 12:05:30,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:05:30,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:30,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:05:30,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:30,621 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:05:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:05:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:05:30,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:05:30,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 12:05:30,896 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:05:30,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 12:05:30,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 12:05:30,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 12:05:30,899 INFO L87 Difference]: Start difference. First operand 1474 states and 2721 transitions. Second operand 5 states. [2018-10-27 12:05:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:05:39,063 INFO L93 Difference]: Finished difference Result 3698 states and 6787 transitions. [2018-10-27 12:05:39,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 12:05:39,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2018-10-27 12:05:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:05:39,085 INFO L225 Difference]: With dead ends: 3698 [2018-10-27 12:05:39,085 INFO L226 Difference]: Without dead ends: 2230 [2018-10-27 12:05:39,091 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 [2018-10-27 12:05:39,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2018-10-27 12:05:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2209. [2018-10-27 12:05:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2209 states. [2018-10-27 12:05:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3833 transitions. [2018-10-27 12:05:39,175 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3833 transitions. Word has length 86 [2018-10-27 12:05:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:05:39,176 INFO L481 AbstractCegarLoop]: Abstraction has 2209 states and 3833 transitions. [2018-10-27 12:05:39,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 12:05:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3833 transitions. [2018-10-27 12:05:39,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-27 12:05:39,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:05:39,185 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 12:05:39,185 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:05:39,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:05:39,186 INFO L82 PathProgramCache]: Analyzing trace with hash 100869727, now seen corresponding path program 1 times [2018-10-27 12:05:39,186 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:05:39,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:39,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:05:39,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:39,188 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:05:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:05:39,483 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 12:05:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:05:39,529 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:05:39,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 12:05:39,530 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:05:39,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:05:39,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:05:39,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:05:39,531 INFO L87 Difference]: Start difference. First operand 2209 states and 3833 transitions. Second operand 6 states. [2018-10-27 12:05:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:05:47,286 INFO L93 Difference]: Finished difference Result 5866 states and 10122 transitions. [2018-10-27 12:05:47,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 12:05:47,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2018-10-27 12:05:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:05:47,322 INFO L225 Difference]: With dead ends: 5866 [2018-10-27 12:05:47,323 INFO L226 Difference]: Without dead ends: 3663 [2018-10-27 12:05:47,333 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 [2018-10-27 12:05:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2018-10-27 12:05:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3639. [2018-10-27 12:05:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3639 states. [2018-10-27 12:05:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 5517 transitions. [2018-10-27 12:05:47,444 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 5517 transitions. Word has length 109 [2018-10-27 12:05:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:05:47,446 INFO L481 AbstractCegarLoop]: Abstraction has 3639 states and 5517 transitions. [2018-10-27 12:05:47,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 12:05:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 5517 transitions. [2018-10-27 12:05:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-27 12:05:47,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:05:47,452 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-27 12:05:47,452 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:05:47,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:05:47,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1677215465, now seen corresponding path program 1 times [2018-10-27 12:05:47,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:05:47,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:47,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:05:47,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:47,455 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:05:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:05:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:05:47,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:05:47,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 12:05:47,713 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:05:47,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:05:47,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:05:47,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:05:47,715 INFO L87 Difference]: Start difference. First operand 3639 states and 5517 transitions. Second operand 6 states. [2018-10-27 12:05:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:05:56,503 INFO L93 Difference]: Finished difference Result 8735 states and 13271 transitions. [2018-10-27 12:05:56,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 12:05:56,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-10-27 12:05:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:05:56,532 INFO L225 Difference]: With dead ends: 8735 [2018-10-27 12:05:56,532 INFO L226 Difference]: Without dead ends: 5102 [2018-10-27 12:05:56,546 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 [2018-10-27 12:05:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2018-10-27 12:05:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 5084. [2018-10-27 12:05:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5084 states. [2018-10-27 12:05:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 6940 transitions. [2018-10-27 12:05:56,678 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 6940 transitions. Word has length 113 [2018-10-27 12:05:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:05:56,678 INFO L481 AbstractCegarLoop]: Abstraction has 5084 states and 6940 transitions. [2018-10-27 12:05:56,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 12:05:56,679 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 6940 transitions. [2018-10-27 12:05:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-27 12:05:56,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:05:56,687 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:05:56,687 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:05:56,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:05:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1672920838, now seen corresponding path program 1 times [2018-10-27 12:05:56,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:05:56,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:56,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:05:56,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:05:56,690 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:05:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:05:56,946 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 12:05:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:05:57,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:05:57,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 12:05:57,184 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:05:57,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:05:57,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:05:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:05:57,186 INFO L87 Difference]: Start difference. First operand 5084 states and 6940 transitions. Second operand 6 states. [2018-10-27 12:06:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:06:03,251 INFO L93 Difference]: Finished difference Result 13307 states and 18750 transitions. [2018-10-27 12:06:03,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 12:06:03,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2018-10-27 12:06:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:06:03,298 INFO L225 Difference]: With dead ends: 13307 [2018-10-27 12:06:03,298 INFO L226 Difference]: Without dead ends: 8229 [2018-10-27 12:06:03,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-27 12:06:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2018-10-27 12:06:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8128. [2018-10-27 12:06:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8128 states. [2018-10-27 12:06:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8128 states to 8128 states and 10817 transitions. [2018-10-27 12:06:03,506 INFO L78 Accepts]: Start accepts. Automaton has 8128 states and 10817 transitions. Word has length 144 [2018-10-27 12:06:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:06:03,506 INFO L481 AbstractCegarLoop]: Abstraction has 8128 states and 10817 transitions. [2018-10-27 12:06:03,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 12:06:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 8128 states and 10817 transitions. [2018-10-27 12:06:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-27 12:06:03,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:06:03,511 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 12:06:03,512 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:06:03,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:06:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1946011279, now seen corresponding path program 1 times [2018-10-27 12:06:03,512 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:06:03,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:06:03,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:06:03,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:06:03,514 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:06:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:06:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 12:06:03,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:06:03,829 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:06:03,830 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2018-10-27 12:06:03,832 INFO L202 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1635], [1637], [1640], [1648], [1656], [1664], [1672], [1680], [1688], [1696], [1704], [1712], [1720], [1728], [1736], [1744], [1752], [1760], [1768], [1776], [1784], [1792], [1800], [1808], [1816], [1824], [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], [2124], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2200], [2996], [3000], [3004], [3010], [3014], [3016], [3025], [3026], [3027], [3029], [3030] [2018-10-27 12:06:03,891 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:06:03,891 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:06:04,345 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 12:06:04,374 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:06:04,377 INFO L272 AbstractInterpreter]: Visited 96 different actions 96 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 12:06:04,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:06:04,420 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:06:04,959 INFO L227 lantSequenceWeakener]: Weakened 168 states. On average, predicates are now at 77.21% of their original sizes. [2018-10-27 12:06:04,963 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:06:05,227 INFO L415 sIntCurrentIteration]: We unified 176 AI predicates to 176 [2018-10-27 12:06:05,228 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:06:05,229 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:06:05,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-27 12:06:05,229 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:06:05,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:06:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:06:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:06:05,230 INFO L87 Difference]: Start difference. First operand 8128 states and 10817 transitions. Second operand 6 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown