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_label52_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 12:06:30,061 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 12:06:30,063 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 12:06:30,077 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 12:06:30,077 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 12:06:30,078 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 12:06:30,080 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 12:06:30,081 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 12:06:30,083 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 12:06:30,084 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 12:06:30,085 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 12:06:30,085 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 12:06:30,086 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 12:06:30,088 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 12:06:30,089 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 12:06:30,090 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 12:06:30,090 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 12:06:30,092 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 12:06:30,095 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 12:06:30,096 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 12:06:30,097 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 12:06:30,099 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 12:06:30,101 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 12:06:30,108 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 12:06:30,108 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 12:06:30,109 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 12:06:30,110 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 12:06:30,111 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 12:06:30,127 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 12:06:30,127 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 12:06:30,128 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 12:06:30,129 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 12:06:30,129 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 12:06:30,129 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 12:06:30,129 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 12:06:30,129 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 12:06:30,130 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 12:06:30,130 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 12:06:30,130 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 12:06:30,130 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 12:06:30,131 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 12:06:30,131 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 12:06:30,131 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 12:06:30,132 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 12:06:30,132 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 12:06:30,132 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 12:06:30,132 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 12:06:30,132 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 12:06:30,133 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 12:06:30,133 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 12:06:30,133 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 12:06:30,133 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 12:06:30,133 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 12:06:30,134 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 12:06:30,134 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 12:06:30,134 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 12:06:30,134 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 12:06:30,134 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 12:06:30,135 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 12:06:30,135 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 12:06:30,135 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 12:06:30,135 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 12:06:30,179 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 12:06:30,192 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 12:06:30,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 12:06:30,198 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 12:06:30,198 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 12:06:30,199 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label52_false-unreach-call.c [2018-10-27 12:06:30,259 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ccb69f685/888e1509a49443b7aa3907c03eb71898/FLAG8043c2a2e [2018-10-27 12:06:30,925 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 12:06:30,926 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label52_false-unreach-call.c [2018-10-27 12:06:30,952 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ccb69f685/888e1509a49443b7aa3907c03eb71898/FLAG8043c2a2e [2018-10-27 12:06:30,967 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ccb69f685/888e1509a49443b7aa3907c03eb71898 [2018-10-27 12:06:30,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 12:06:30,981 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 12:06:30,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 12:06:30,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 12:06:30,987 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 12:06:30,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:06:30" (1/1) ... [2018-10-27 12:06:30,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31151419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:30, skipping insertion in model container [2018-10-27 12:06:30,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:06:30" (1/1) ... [2018-10-27 12:06:31,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 12:06:31,133 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 12:06:32,171 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:06:32,175 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 12:06:32,679 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 12:06:32,708 INFO L193 MainTranslator]: Completed translation [2018-10-27 12:06:32,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32 WrapperNode [2018-10-27 12:06:32,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 12:06:32,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 12:06:32,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 12:06:32,710 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 12:06:32,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (1/1) ... [2018-10-27 12:06:32,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (1/1) ... [2018-10-27 12:06:33,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 12:06:33,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 12:06:33,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 12:06:33,217 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 12:06:33,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (1/1) ... [2018-10-27 12:06:33,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (1/1) ... [2018-10-27 12:06:33,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (1/1) ... [2018-10-27 12:06:33,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (1/1) ... [2018-10-27 12:06:33,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (1/1) ... [2018-10-27 12:06:33,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (1/1) ... [2018-10-27 12:06:33,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (1/1) ... [2018-10-27 12:06:33,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 12:06:33,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 12:06:33,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 12:06:33,443 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 12:06:33,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (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 12:06:33,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 12:06:33,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 12:06:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-27 12:06:33,522 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-27 12:06:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 12:06:33,522 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 12:06:33,522 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 12:06:33,523 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 12:06:33,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 12:06:33,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 12:06:33,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 12:06:33,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 12:06:41,330 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 12:06:41,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:06:41 BoogieIcfgContainer [2018-10-27 12:06:41,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 12:06:41,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 12:06:41,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 12:06:41,338 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 12:06:41,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:06:30" (1/3) ... [2018-10-27 12:06:41,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3f5675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:06:41, skipping insertion in model container [2018-10-27 12:06:41,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:06:32" (2/3) ... [2018-10-27 12:06:41,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3f5675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:06:41, skipping insertion in model container [2018-10-27 12:06:41,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:06:41" (3/3) ... [2018-10-27 12:06:41,343 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label52_false-unreach-call.c [2018-10-27 12:06:41,352 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 12:06:41,361 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 12:06:41,379 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 12:06:41,425 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 12:06:41,426 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 12:06:41,426 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 12:06:41,426 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 12:06:41,426 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 12:06:41,426 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 12:06:41,427 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 12:06:41,427 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 12:06:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states. [2018-10-27 12:06:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-27 12:06:41,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:06:41,476 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] [2018-10-27 12:06:41,478 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:06:41,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:06:41,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1718178119, now seen corresponding path program 1 times [2018-10-27 12:06:41,488 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:06:41,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:06:41,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:06:41,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:06:41,534 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:06:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:06:41,922 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 12:06:41,927 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:06:41,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 12:06:41,927 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:06:41,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 12:06:41,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 12:06:41,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 12:06:41,967 INFO L87 Difference]: Start difference. First operand 775 states. Second operand 4 states. [2018-10-27 12:06:52,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:06:52,706 INFO L93 Difference]: Finished difference Result 2974 states and 5747 transitions. [2018-10-27 12:06:52,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 12:06:52,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-10-27 12:06:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:06:52,753 INFO L225 Difference]: With dead ends: 2974 [2018-10-27 12:06:52,753 INFO L226 Difference]: Without dead ends: 2193 [2018-10-27 12:06:52,763 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 [2018-10-27 12:06:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2018-10-27 12:06:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2193. [2018-10-27 12:06:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2193 states. [2018-10-27 12:06:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3506 transitions. [2018-10-27 12:06:52,955 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3506 transitions. Word has length 23 [2018-10-27 12:06:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:06:52,956 INFO L481 AbstractCegarLoop]: Abstraction has 2193 states and 3506 transitions. [2018-10-27 12:06:52,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 12:06:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3506 transitions. [2018-10-27 12:06:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-27 12:06:52,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:06:52,963 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] [2018-10-27 12:06:52,963 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:06:52,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:06:52,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1227431640, now seen corresponding path program 1 times [2018-10-27 12:06:52,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:06:52,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:06:52,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:06:52,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:06:52,966 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:06:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:06:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:06:53,367 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:06:53,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 12:06:53,367 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:06:53,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 12:06:53,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 12:06:53,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 12:06:53,370 INFO L87 Difference]: Start difference. First operand 2193 states and 3506 transitions. Second operand 5 states. [2018-10-27 12:07:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:07:02,445 INFO L93 Difference]: Finished difference Result 6600 states and 10738 transitions. [2018-10-27 12:07:02,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 12:07:02,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2018-10-27 12:07:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:07:02,480 INFO L225 Difference]: With dead ends: 6600 [2018-10-27 12:07:02,480 INFO L226 Difference]: Without dead ends: 4413 [2018-10-27 12:07:02,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 12:07:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2018-10-27 12:07:02,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 4378. [2018-10-27 12:07:02,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4378 states. [2018-10-27 12:07:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 6712 transitions. [2018-10-27 12:07:02,633 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 6712 transitions. Word has length 93 [2018-10-27 12:07:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:07:02,633 INFO L481 AbstractCegarLoop]: Abstraction has 4378 states and 6712 transitions. [2018-10-27 12:07:02,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 12:07:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 6712 transitions. [2018-10-27 12:07:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-27 12:07:02,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:07:02,640 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] [2018-10-27 12:07:02,640 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:07:02,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:07:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1923349871, now seen corresponding path program 1 times [2018-10-27 12:07:02,641 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:07:02,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:07:02,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:07:02,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:07:02,644 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:07:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:07:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:07:02,929 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:07:02,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-27 12:07:02,929 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:07:02,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:07:02,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:07:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:07:02,931 INFO L87 Difference]: Start difference. First operand 4378 states and 6712 transitions. Second operand 6 states. [2018-10-27 12:07:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:07:08,541 INFO L93 Difference]: Finished difference Result 11002 states and 16943 transitions. [2018-10-27 12:07:08,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 12:07:08,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2018-10-27 12:07:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:07:08,577 INFO L225 Difference]: With dead ends: 11002 [2018-10-27 12:07:08,578 INFO L226 Difference]: Without dead ends: 6630 [2018-10-27 12:07:08,593 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 12:07:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2018-10-27 12:07:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 6590. [2018-10-27 12:07:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6590 states. [2018-10-27 12:07:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 8773 transitions. [2018-10-27 12:07:08,760 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 8773 transitions. Word has length 120 [2018-10-27 12:07:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:07:08,763 INFO L481 AbstractCegarLoop]: Abstraction has 6590 states and 8773 transitions. [2018-10-27 12:07:08,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 12:07:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 8773 transitions. [2018-10-27 12:07:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-27 12:07:08,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:07:08,770 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] [2018-10-27 12:07:08,770 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:07:08,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:07:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1072228357, now seen corresponding path program 1 times [2018-10-27 12:07:08,771 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:07:08,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:07:08,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:07:08,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:07:08,773 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:07:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:07:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 12:07:09,030 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:07:09,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 12:07:09,031 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:07:09,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 12:07:09,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 12:07:09,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 12:07:09,035 INFO L87 Difference]: Start difference. First operand 6590 states and 8773 transitions. Second operand 4 states. [2018-10-27 12:07:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:07:14,843 INFO L93 Difference]: Finished difference Result 13174 states and 17554 transitions. [2018-10-27 12:07:14,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 12:07:14,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2018-10-27 12:07:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:07:14,885 INFO L225 Difference]: With dead ends: 13174 [2018-10-27 12:07:14,885 INFO L226 Difference]: Without dead ends: 6590 [2018-10-27 12:07:14,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 12:07:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6590 states. [2018-10-27 12:07:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6590 to 6590. [2018-10-27 12:07:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6590 states. [2018-10-27 12:07:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6590 states to 6590 states and 8069 transitions. [2018-10-27 12:07:15,029 INFO L78 Accepts]: Start accepts. Automaton has 6590 states and 8069 transitions. Word has length 130 [2018-10-27 12:07:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:07:15,030 INFO L481 AbstractCegarLoop]: Abstraction has 6590 states and 8069 transitions. [2018-10-27 12:07:15,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 12:07:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 6590 states and 8069 transitions. [2018-10-27 12:07:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-27 12:07:15,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:07:15,037 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:07:15,037 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:07:15,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:07:15,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2065744106, now seen corresponding path program 1 times [2018-10-27 12:07:15,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:07:15,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:07:15,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:07:15,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:07:15,039 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:07:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:07:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-27 12:07:15,281 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 12:07:15,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 12:07:15,281 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:07:15,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 12:07:15,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 12:07:15,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 12:07:15,283 INFO L87 Difference]: Start difference. First operand 6590 states and 8069 transitions. Second operand 4 states. [2018-10-27 12:07:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 12:07:23,182 INFO L93 Difference]: Finished difference Result 26037 states and 32773 transitions. [2018-10-27 12:07:23,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 12:07:23,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 200 [2018-10-27 12:07:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 12:07:23,263 INFO L225 Difference]: With dead ends: 26037 [2018-10-27 12:07:23,263 INFO L226 Difference]: Without dead ends: 19453 [2018-10-27 12:07:23,288 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 [2018-10-27 12:07:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19453 states. [2018-10-27 12:07:23,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19453 to 18750. [2018-10-27 12:07:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18750 states. [2018-10-27 12:07:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18750 states to 18750 states and 22778 transitions. [2018-10-27 12:07:23,657 INFO L78 Accepts]: Start accepts. Automaton has 18750 states and 22778 transitions. Word has length 200 [2018-10-27 12:07:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 12:07:23,658 INFO L481 AbstractCegarLoop]: Abstraction has 18750 states and 22778 transitions. [2018-10-27 12:07:23,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 12:07:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 18750 states and 22778 transitions. [2018-10-27 12:07:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-27 12:07:23,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 12:07:23,664 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 12:07:23,664 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 12:07:23,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:07:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash -495991293, now seen corresponding path program 1 times [2018-10-27 12:07:23,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 12:07:23,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:07:23,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 12:07:23,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 12:07:23,666 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 12:07:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 12:07:24,090 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-27 12:07:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 32 proven. 84 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 12:07:24,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 12:07:24,272 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 12:07:24,273 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 220 with the following transitions: [2018-10-27 12:07:24,276 INFO L202 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1707], [1709], [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], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2192], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2264], [2996], [3000], [3004], [3010], [3014], [3016], [3025], [3026], [3027], [3029], [3030] [2018-10-27 12:07:24,335 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 12:07:24,336 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 12:07:24,838 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 12:07:25,412 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 12:07:25,414 INFO L272 AbstractInterpreter]: Visited 112 different actions 112 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 12:07:25,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 12:07:25,456 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 12:07:26,538 INFO L227 lantSequenceWeakener]: Weakened 210 states. On average, predicates are now at 77.42% of their original sizes. [2018-10-27 12:07:26,538 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 12:07:26,794 INFO L415 sIntCurrentIteration]: We unified 218 AI predicates to 218 [2018-10-27 12:07:26,795 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 12:07:26,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 12:07:26,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2018-10-27 12:07:26,800 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 12:07:26,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 12:07:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 12:07:26,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 12:07:26,801 INFO L87 Difference]: Start difference. First operand 18750 states and 22778 transitions. Second operand 6 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown