java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 21:20:17,916 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 21:20:17,918 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 21:20:17,932 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 21:20:17,932 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 21:20:17,933 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 21:20:17,935 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 21:20:17,941 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 21:20:17,942 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 21:20:17,943 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 21:20:17,944 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 21:20:17,947 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 21:20:17,948 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 21:20:17,949 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 21:20:17,953 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 21:20:17,954 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 21:20:17,956 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 21:20:17,961 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 21:20:17,967 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 21:20:17,971 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 21:20:17,973 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 21:20:17,977 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 21:20:17,979 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 21:20:17,988 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 21:20:18,008 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 21:20:18,009 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 21:20:18,010 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 21:20:18,011 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 21:20:18,011 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 21:20:18,011 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 21:20:18,011 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 21:20:18,011 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 21:20:18,012 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 21:20:18,012 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 21:20:18,012 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 21:20:18,012 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 21:20:18,013 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 21:20:18,013 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 21:20:18,013 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 21:20:18,014 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 21:20:18,014 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 21:20:18,014 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 21:20:18,014 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 21:20:18,014 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 21:20:18,015 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 21:20:18,016 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 21:20:18,016 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 21:20:18,016 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 21:20:18,016 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 21:20:18,017 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 21:20:18,017 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 21:20:18,017 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 21:20:18,017 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 21:20:18,017 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 21:20:18,017 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 21:20:18,018 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 21:20:18,018 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 21:20:18,018 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 21:20:18,070 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 21:20:18,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 21:20:18,107 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 21:20:18,109 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 21:20:18,110 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 21:20:18,111 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43_false-unreach-call.c [2018-10-23 21:20:18,181 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dd3bd3bc2/693ee85aaf6d4efc911dc0f9a4667cf8/FLAGeda2b48ef [2018-10-23 21:20:18,922 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 21:20:18,923 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label43_false-unreach-call.c [2018-10-23 21:20:18,943 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dd3bd3bc2/693ee85aaf6d4efc911dc0f9a4667cf8/FLAGeda2b48ef [2018-10-23 21:20:18,961 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/dd3bd3bc2/693ee85aaf6d4efc911dc0f9a4667cf8 [2018-10-23 21:20:18,975 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 21:20:18,977 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 21:20:18,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 21:20:18,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 21:20:18,989 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 21:20:18,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:20:18" (1/1) ... [2018-10-23 21:20:18,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6465e754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:18, skipping insertion in model container [2018-10-23 21:20:18,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:20:18" (1/1) ... [2018-10-23 21:20:19,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 21:20:19,102 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 21:20:19,799 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 21:20:19,805 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 21:20:20,211 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 21:20:20,237 INFO L193 MainTranslator]: Completed translation [2018-10-23 21:20:20,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20 WrapperNode [2018-10-23 21:20:20,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 21:20:20,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 21:20:20,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 21:20:20,239 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 21:20:20,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (1/1) ... [2018-10-23 21:20:20,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (1/1) ... [2018-10-23 21:20:20,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 21:20:20,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 21:20:20,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 21:20:20,595 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 21:20:20,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (1/1) ... [2018-10-23 21:20:20,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (1/1) ... [2018-10-23 21:20:20,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (1/1) ... [2018-10-23 21:20:20,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (1/1) ... [2018-10-23 21:20:20,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (1/1) ... [2018-10-23 21:20:20,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (1/1) ... [2018-10-23 21:20:20,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (1/1) ... [2018-10-23 21:20:20,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 21:20:20,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 21:20:20,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 21:20:20,762 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 21:20:20,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (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 [2018-10-23 21:20:20,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 21:20:20,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 21:20:20,849 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-23 21:20:20,849 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-23 21:20:20,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 21:20:20,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 21:20:20,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 21:20:20,850 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 21:20:25,588 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 21:20:25,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:20:25 BoogieIcfgContainer [2018-10-23 21:20:25,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 21:20:25,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 21:20:25,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 21:20:25,599 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 21:20:25,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:20:18" (1/3) ... [2018-10-23 21:20:25,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44abd151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:20:25, skipping insertion in model container [2018-10-23 21:20:25,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:20:20" (2/3) ... [2018-10-23 21:20:25,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44abd151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:20:25, skipping insertion in model container [2018-10-23 21:20:25,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:20:25" (3/3) ... [2018-10-23 21:20:25,606 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label43_false-unreach-call.c [2018-10-23 21:20:25,617 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 21:20:25,629 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 21:20:25,649 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 21:20:25,694 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 21:20:25,694 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 21:20:25,694 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 21:20:25,695 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 21:20:25,695 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 21:20:25,695 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 21:20:25,695 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 21:20:25,695 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 21:20:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-23 21:20:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-23 21:20:25,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 21:20:25,748 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 21:20:25,751 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 21:20:25,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 21:20:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1369692532, now seen corresponding path program 1 times [2018-10-23 21:20:25,759 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 21:20:25,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:25,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 21:20:25,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:25,814 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 21:20:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 21:20:26,720 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-10-23 21:20:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 21:20:27,024 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 21:20:27,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 21:20:27,025 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 21:20:27,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 21:20:27,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 21:20:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 21:20:27,057 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-10-23 21:20:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 21:20:30,799 INFO L93 Difference]: Finished difference Result 1066 states and 1924 transitions. [2018-10-23 21:20:30,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 21:20:30,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 157 [2018-10-23 21:20:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 21:20:30,832 INFO L225 Difference]: With dead ends: 1066 [2018-10-23 21:20:30,832 INFO L226 Difference]: Without dead ends: 748 [2018-10-23 21:20:30,841 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 [2018-10-23 21:20:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2018-10-23 21:20:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 527. [2018-10-23 21:20:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2018-10-23 21:20:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 902 transitions. [2018-10-23 21:20:30,938 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 902 transitions. Word has length 157 [2018-10-23 21:20:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 21:20:30,940 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 902 transitions. [2018-10-23 21:20:30,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 21:20:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 902 transitions. [2018-10-23 21:20:30,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-23 21:20:30,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 21:20:30,949 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 21:20:30,949 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 21:20:30,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 21:20:30,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1257030803, now seen corresponding path program 1 times [2018-10-23 21:20:30,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 21:20:30,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:30,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 21:20:30,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:30,952 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 21:20:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 21:20:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 21:20:31,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 21:20:31,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 21:20:31,491 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 21:20:31,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 21:20:31,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 21:20:31,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 21:20:31,494 INFO L87 Difference]: Start difference. First operand 527 states and 902 transitions. Second operand 6 states. [2018-10-23 21:20:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 21:20:34,749 INFO L93 Difference]: Finished difference Result 1590 states and 2793 transitions. [2018-10-23 21:20:34,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 21:20:34,760 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 167 [2018-10-23 21:20:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 21:20:34,775 INFO L225 Difference]: With dead ends: 1590 [2018-10-23 21:20:34,776 INFO L226 Difference]: Without dead ends: 1069 [2018-10-23 21:20:34,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 21:20:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2018-10-23 21:20:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1024. [2018-10-23 21:20:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-10-23 21:20:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1746 transitions. [2018-10-23 21:20:34,848 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1746 transitions. Word has length 167 [2018-10-23 21:20:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 21:20:34,849 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 1746 transitions. [2018-10-23 21:20:34,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 21:20:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1746 transitions. [2018-10-23 21:20:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-23 21:20:34,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 21:20:34,855 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 21:20:34,855 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 21:20:34,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 21:20:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1501741467, now seen corresponding path program 1 times [2018-10-23 21:20:34,856 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 21:20:34,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:34,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 21:20:34,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:34,857 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 21:20:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 21:20:35,134 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 21:20:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 21:20:35,167 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 21:20:35,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 21:20:35,167 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 21:20:35,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 21:20:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 21:20:35,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 21:20:35,169 INFO L87 Difference]: Start difference. First operand 1024 states and 1746 transitions. Second operand 5 states. [2018-10-23 21:20:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 21:20:38,594 INFO L93 Difference]: Finished difference Result 3166 states and 5674 transitions. [2018-10-23 21:20:38,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 21:20:38,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2018-10-23 21:20:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 21:20:38,618 INFO L225 Difference]: With dead ends: 3166 [2018-10-23 21:20:38,619 INFO L226 Difference]: Without dead ends: 2148 [2018-10-23 21:20:38,629 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 [2018-10-23 21:20:38,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2018-10-23 21:20:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2105. [2018-10-23 21:20:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2105 states. [2018-10-23 21:20:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 3422 transitions. [2018-10-23 21:20:38,738 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 3422 transitions. Word has length 168 [2018-10-23 21:20:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 21:20:38,739 INFO L481 AbstractCegarLoop]: Abstraction has 2105 states and 3422 transitions. [2018-10-23 21:20:38,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 21:20:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 3422 transitions. [2018-10-23 21:20:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-23 21:20:38,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 21:20:38,750 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 21:20:38,751 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 21:20:38,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 21:20:38,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2091995536, now seen corresponding path program 1 times [2018-10-23 21:20:38,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 21:20:38,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:38,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 21:20:38,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:38,753 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 21:20:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 21:20:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 21:20:39,056 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 21:20:39,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 21:20:39,056 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 21:20:39,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 21:20:39,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 21:20:39,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 21:20:39,058 INFO L87 Difference]: Start difference. First operand 2105 states and 3422 transitions. Second operand 3 states. [2018-10-23 21:20:41,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 21:20:41,125 INFO L93 Difference]: Finished difference Result 6103 states and 10298 transitions. [2018-10-23 21:20:41,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 21:20:41,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2018-10-23 21:20:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 21:20:41,152 INFO L225 Difference]: With dead ends: 6103 [2018-10-23 21:20:41,152 INFO L226 Difference]: Without dead ends: 4004 [2018-10-23 21:20:41,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 21:20:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2018-10-23 21:20:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 3997. [2018-10-23 21:20:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3997 states. [2018-10-23 21:20:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 6338 transitions. [2018-10-23 21:20:41,381 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 6338 transitions. Word has length 170 [2018-10-23 21:20:41,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 21:20:41,382 INFO L481 AbstractCegarLoop]: Abstraction has 3997 states and 6338 transitions. [2018-10-23 21:20:41,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 21:20:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 6338 transitions. [2018-10-23 21:20:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-23 21:20:41,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 21:20:41,393 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 21:20:41,393 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 21:20:41,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 21:20:41,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2082264545, now seen corresponding path program 1 times [2018-10-23 21:20:41,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 21:20:41,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:41,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 21:20:41,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:41,396 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 21:20:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 21:20:41,633 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 21:20:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 21:20:41,719 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 21:20:41,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 21:20:41,720 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 21:20:41,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 21:20:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 21:20:41,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 21:20:41,721 INFO L87 Difference]: Start difference. First operand 3997 states and 6338 transitions. Second operand 6 states. [2018-10-23 21:20:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 21:20:43,764 INFO L93 Difference]: Finished difference Result 12245 states and 21126 transitions. [2018-10-23 21:20:43,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 21:20:43,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2018-10-23 21:20:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 21:20:43,828 INFO L225 Difference]: With dead ends: 12245 [2018-10-23 21:20:43,828 INFO L226 Difference]: Without dead ends: 8254 [2018-10-23 21:20:43,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 21:20:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8254 states. [2018-10-23 21:20:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8254 to 8069. [2018-10-23 21:20:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8069 states. [2018-10-23 21:20:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 12454 transitions. [2018-10-23 21:20:44,154 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 12454 transitions. Word has length 177 [2018-10-23 21:20:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 21:20:44,155 INFO L481 AbstractCegarLoop]: Abstraction has 8069 states and 12454 transitions. [2018-10-23 21:20:44,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 21:20:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 12454 transitions. [2018-10-23 21:20:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-23 21:20:44,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 21:20:44,178 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 21:20:44,178 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 21:20:44,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 21:20:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1864572249, now seen corresponding path program 1 times [2018-10-23 21:20:44,179 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 21:20:44,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:44,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 21:20:44,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 21:20:44,180 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 21:20:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 21:20:44,453 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-23 21:20:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 21:20:44,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 21:20:44,503 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 21:20:44,504 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 182 with the following transitions: [2018-10-23 21:20:44,506 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [28], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [717], [719], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-23 21:20:44,605 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 21:20:44,605 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-10-23 21:24:51,215 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-10-23 21:24:51,216 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-10-23 21:24:51,218 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 21:24:51,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 21:24:51,218 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 21:24:51,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 21:24:51,229 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 21:24:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 21:24:51,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 21:24:51,479 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 21:24:51,681 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 21:24:51,682 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 21:24:51,688 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 21:24:51,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:24:51 BoogieIcfgContainer [2018-10-23 21:24:51,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 21:24:51,690 INFO L168 Benchmark]: Toolchain (without parser) took 272714.15 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -525.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-23 21:24:51,691 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 21:24:51,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1258.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-23 21:24:51,693 INFO L168 Benchmark]: Boogie Procedure Inliner took 356.00 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 713.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -836.4 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-23 21:24:51,694 INFO L168 Benchmark]: Boogie Preprocessor took 165.76 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2018-10-23 21:24:51,695 INFO L168 Benchmark]: RCFGBuilder took 4832.56 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 273.4 MB). Peak memory consumption was 273.4 MB. Max. memory is 7.1 GB. [2018-10-23 21:24:51,696 INFO L168 Benchmark]: TraceAbstraction took 266093.22 ms. Allocated memory was 2.2 GB in the beginning and 3.2 GB in the end (delta: 976.7 MB). Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: -51.0 MB). Peak memory consumption was 925.7 MB. Max. memory is 7.1 GB. [2018-10-23 21:24:51,702 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1258.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 356.00 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 713.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -836.4 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 165.76 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4832.56 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 273.4 MB). Peak memory consumption was 273.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 266093.22 ms. Allocated memory was 2.2 GB in the beginning and 3.2 GB in the end (delta: 976.7 MB). Free memory was 1.9 GB in the beginning and 1.9 GB in the end (delta: -51.0 MB). Peak memory consumption was 925.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1485]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1485). Cancelled while BasicCegarLoop was analyzing trace of length 182 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 5 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 266.0s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 14.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1108 SDtfs, 3922 SDslu, 816 SDs, 0 SdLazy, 6207 SolverSat, 1110 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8069occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 246.7s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 5 MinimizatonAttempts, 501 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 839 NumberOfCodeBlocks, 839 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 834 ConstructedInterpolants, 0 QuantifiedInterpolants, 409086 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 40/40 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown