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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label52_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 04:22:23,145 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 04:22:23,147 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 04:22:23,164 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 04:22:23,165 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 04:22:23,166 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 04:22:23,167 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 04:22:23,169 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 04:22:23,170 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 04:22:23,171 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 04:22:23,172 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 04:22:23,173 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 04:22:23,174 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 04:22:23,174 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 04:22:23,176 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 04:22:23,176 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 04:22:23,177 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 04:22:23,179 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 04:22:23,181 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 04:22:23,183 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 04:22:23,184 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 04:22:23,185 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 04:22:23,191 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 04:22:23,208 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 04:22:23,225 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 04:22:23,225 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 04:22:23,226 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 04:22:23,226 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 04:22:23,226 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 04:22:23,226 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 04:22:23,226 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 04:22:23,227 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 04:22:23,227 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 04:22:23,227 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 04:22:23,227 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 04:22:23,227 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 04:22:23,228 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 04:22:23,228 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 04:22:23,228 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 04:22:23,229 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 04:22:23,229 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 04:22:23,229 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 04:22:23,229 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 04:22:23,229 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 04:22:23,230 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 04:22:23,230 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 04:22:23,230 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 04:22:23,230 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 04:22:23,230 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 04:22:23,231 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 04:22:23,231 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 04:22:23,231 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 04:22:23,231 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 04:22:23,231 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 04:22:23,232 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 04:22:23,232 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 04:22:23,232 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 04:22:23,232 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 04:22:23,232 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 04:22:23,232 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 04:22:23,284 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 04:22:23,298 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 04:22:23,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 04:22:23,306 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 04:22:23,307 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 04:22:23,308 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label52_false-unreach-call.c [2018-10-27 04:22:23,375 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/eca45d29b/33f2d67603f04d38a933d868fddf8cf1/FLAG3b3461d33 [2018-10-27 04:22:24,039 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 04:22:24,040 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label52_false-unreach-call.c [2018-10-27 04:22:24,060 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/eca45d29b/33f2d67603f04d38a933d868fddf8cf1/FLAG3b3461d33 [2018-10-27 04:22:24,078 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/eca45d29b/33f2d67603f04d38a933d868fddf8cf1 [2018-10-27 04:22:24,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 04:22:24,092 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 04:22:24,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 04:22:24,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 04:22:24,101 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 04:22:24,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:22:24" (1/1) ... [2018-10-27 04:22:24,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cfde71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:24, skipping insertion in model container [2018-10-27 04:22:24,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:22:24" (1/1) ... [2018-10-27 04:22:24,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 04:22:24,217 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 04:22:24,897 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:22:24,903 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 04:22:25,184 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 04:22:25,210 INFO L193 MainTranslator]: Completed translation [2018-10-27 04:22:25,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25 WrapperNode [2018-10-27 04:22:25,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 04:22:25,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 04:22:25,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 04:22:25,212 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 04:22:25,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (1/1) ... [2018-10-27 04:22:25,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (1/1) ... [2018-10-27 04:22:25,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 04:22:25,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 04:22:25,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 04:22:25,527 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 04:22:25,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (1/1) ... [2018-10-27 04:22:25,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (1/1) ... [2018-10-27 04:22:25,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (1/1) ... [2018-10-27 04:22:25,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (1/1) ... [2018-10-27 04:22:25,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (1/1) ... [2018-10-27 04:22:25,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (1/1) ... [2018-10-27 04:22:25,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (1/1) ... [2018-10-27 04:22:25,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 04:22:25,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 04:22:25,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 04:22:25,652 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 04:22:25,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (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 04:22:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 04:22:25,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 04:22:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 04:22:25,723 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 04:22:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 04:22:25,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 04:22:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 04:22:25,723 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 04:22:30,909 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 04:22:30,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:22:30 BoogieIcfgContainer [2018-10-27 04:22:30,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 04:22:30,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 04:22:30,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 04:22:30,915 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 04:22:30,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:22:24" (1/3) ... [2018-10-27 04:22:30,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2d4df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:22:30, skipping insertion in model container [2018-10-27 04:22:30,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:22:25" (2/3) ... [2018-10-27 04:22:30,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2d4df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:22:30, skipping insertion in model container [2018-10-27 04:22:30,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:22:30" (3/3) ... [2018-10-27 04:22:30,920 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label52_false-unreach-call.c [2018-10-27 04:22:30,931 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 04:22:30,947 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 04:22:30,969 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 04:22:31,012 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 04:22:31,012 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 04:22:31,012 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 04:22:31,012 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 04:22:31,012 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 04:22:31,013 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 04:22:31,013 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 04:22:31,013 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 04:22:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 04:22:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-27 04:22:31,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:22:31,081 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] [2018-10-27 04:22:31,084 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:22:31,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:22:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash 132642340, now seen corresponding path program 1 times [2018-10-27 04:22:31,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:22:31,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:22:31,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:22:31,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:22:31,147 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:22:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:22:32,017 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 04:22:32,226 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 04:22:32,228 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:22:32,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:22:32,229 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:22:32,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:22:32,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:22:32,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:22:32,255 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 3 states. [2018-10-27 04:22:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:22:34,589 INFO L93 Difference]: Finished difference Result 848 states and 1491 transitions. [2018-10-27 04:22:34,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:22:34,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2018-10-27 04:22:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:22:34,615 INFO L225 Difference]: With dead ends: 848 [2018-10-27 04:22:34,615 INFO L226 Difference]: Without dead ends: 534 [2018-10-27 04:22:34,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:22:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2018-10-27 04:22:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2018-10-27 04:22:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-10-27 04:22:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 867 transitions. [2018-10-27 04:22:34,752 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 867 transitions. Word has length 153 [2018-10-27 04:22:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:22:34,753 INFO L481 AbstractCegarLoop]: Abstraction has 532 states and 867 transitions. [2018-10-27 04:22:34,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:22:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 867 transitions. [2018-10-27 04:22:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-27 04:22:34,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:22:34,761 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] [2018-10-27 04:22:34,761 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:22:34,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:22:34,762 INFO L82 PathProgramCache]: Analyzing trace with hash 962373920, now seen corresponding path program 1 times [2018-10-27 04:22:34,762 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:22:34,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:22:34,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:22:34,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:22:34,764 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:22:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:22:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:22:35,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 04:22:35,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 04:22:35,201 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:22:35,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:22:35,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:22:35,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 04:22:35,203 INFO L87 Difference]: Start difference. First operand 532 states and 867 transitions. Second operand 3 states. [2018-10-27 04:22:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:22:37,295 INFO L93 Difference]: Finished difference Result 1494 states and 2513 transitions. [2018-10-27 04:22:37,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:22:37,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 166 [2018-10-27 04:22:37,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:22:37,304 INFO L225 Difference]: With dead ends: 1494 [2018-10-27 04:22:37,305 INFO L226 Difference]: Without dead ends: 968 [2018-10-27 04:22:37,310 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 [2018-10-27 04:22:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2018-10-27 04:22:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 952. [2018-10-27 04:22:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 952 states. [2018-10-27 04:22:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1529 transitions. [2018-10-27 04:22:37,354 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1529 transitions. Word has length 166 [2018-10-27 04:22:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:22:37,355 INFO L481 AbstractCegarLoop]: Abstraction has 952 states and 1529 transitions. [2018-10-27 04:22:37,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:22:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1529 transitions. [2018-10-27 04:22:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-27 04:22:37,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:22:37,361 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 04:22:37,361 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:22:37,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:22:37,362 INFO L82 PathProgramCache]: Analyzing trace with hash 766647040, now seen corresponding path program 1 times [2018-10-27 04:22:37,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:22:37,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:22:37,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:22:37,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:22:37,367 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:22:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:22:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:22:37,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:22:37,776 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:22:37,777 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2018-10-27 04:22:37,782 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [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], [685], [687], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 04:22:37,858 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 04:22:37,859 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:22:38,908 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 04:22:38,909 INFO L272 AbstractInterpreter]: Visited 154 different actions 154 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-27 04:22:38,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:22:38,952 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 04:22:39,862 INFO L227 lantSequenceWeakener]: Weakened 168 states. On average, predicates are now at 69.87% of their original sizes. [2018-10-27 04:22:39,863 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 04:22:40,246 INFO L415 sIntCurrentIteration]: We unified 176 AI predicates to 176 [2018-10-27 04:22:40,246 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 04:22:40,247 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 04:22:40,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-10-27 04:22:40,247 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:22:40,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-27 04:22:40,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-27 04:22:40,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-10-27 04:22:40,249 INFO L87 Difference]: Start difference. First operand 952 states and 1529 transitions. Second operand 13 states. [2018-10-27 04:23:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:23:00,942 INFO L93 Difference]: Finished difference Result 2108 states and 3387 transitions. [2018-10-27 04:23:00,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 04:23:00,942 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 177 [2018-10-27 04:23:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:23:00,949 INFO L225 Difference]: With dead ends: 2108 [2018-10-27 04:23:00,950 INFO L226 Difference]: Without dead ends: 1162 [2018-10-27 04:23:00,953 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 177 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2018-10-27 04:23:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2018-10-27 04:23:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1160. [2018-10-27 04:23:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2018-10-27 04:23:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1747 transitions. [2018-10-27 04:23:00,988 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1747 transitions. Word has length 177 [2018-10-27 04:23:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:23:00,989 INFO L481 AbstractCegarLoop]: Abstraction has 1160 states and 1747 transitions. [2018-10-27 04:23:00,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-27 04:23:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1747 transitions. [2018-10-27 04:23:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-27 04:23:00,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:23:00,994 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 04:23:00,994 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:23:00,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2135608565, now seen corresponding path program 1 times [2018-10-27 04:23:00,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:23:00,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:00,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:00,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:00,997 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:23:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:23:01,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:01,203 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:23:01,204 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 187 with the following transitions: [2018-10-27 04:23:01,204 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [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], [685], [687], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 04:23:01,213 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 04:23:01,213 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:23:01,984 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:23:01,985 INFO L272 AbstractInterpreter]: Visited 158 different actions 314 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 04:23:02,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:02,005 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:23:02,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:02,005 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 [2018-10-27 04:23:02,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:02,016 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:23:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:02,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:23:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:23:02,723 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:23:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:23:03,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:23:03,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-10-27 04:23:03,339 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:23:03,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 04:23:03,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 04:23:03,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-10-27 04:23:03,340 INFO L87 Difference]: Start difference. First operand 1160 states and 1747 transitions. Second operand 9 states. [2018-10-27 04:23:04,066 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-27 04:23:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:23:14,908 INFO L93 Difference]: Finished difference Result 9426 states and 19261 transitions. [2018-10-27 04:23:14,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-27 04:23:14,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 186 [2018-10-27 04:23:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:23:15,018 INFO L225 Difference]: With dead ends: 9426 [2018-10-27 04:23:15,018 INFO L226 Difference]: Without dead ends: 8480 [2018-10-27 04:23:15,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2018-10-27 04:23:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8480 states. [2018-10-27 04:23:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8480 to 8113. [2018-10-27 04:23:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8113 states. [2018-10-27 04:23:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8113 states to 8113 states and 12545 transitions. [2018-10-27 04:23:15,457 INFO L78 Accepts]: Start accepts. Automaton has 8113 states and 12545 transitions. Word has length 186 [2018-10-27 04:23:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:23:15,458 INFO L481 AbstractCegarLoop]: Abstraction has 8113 states and 12545 transitions. [2018-10-27 04:23:15,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 04:23:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 8113 states and 12545 transitions. [2018-10-27 04:23:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-27 04:23:15,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:23:15,494 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:15,495 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:23:15,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1792689718, now seen corresponding path program 1 times [2018-10-27 04:23:15,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:23:15,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:15,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:15,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:15,497 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:23:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:23:15,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:15,754 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:23:15,754 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 201 with the following transitions: [2018-10-27 04:23:15,755 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [123], [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], [685], [687], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 04:23:15,762 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 04:23:15,763 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:23:17,075 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 04:23:17,075 INFO L272 AbstractInterpreter]: Visited 157 different actions 308 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 04:23:17,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:17,114 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 04:23:17,929 INFO L227 lantSequenceWeakener]: Weakened 197 states. On average, predicates are now at 70.38% of their original sizes. [2018-10-27 04:23:17,929 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 04:23:19,108 INFO L415 sIntCurrentIteration]: We unified 199 AI predicates to 199 [2018-10-27 04:23:19,108 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 04:23:19,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 04:23:19,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [6] total 24 [2018-10-27 04:23:19,109 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:23:19,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-27 04:23:19,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-27 04:23:19,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-10-27 04:23:19,110 INFO L87 Difference]: Start difference. First operand 8113 states and 12545 transitions. Second operand 20 states. [2018-10-27 04:23:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:23:32,292 INFO L93 Difference]: Finished difference Result 16176 states and 24700 transitions. [2018-10-27 04:23:32,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 04:23:32,292 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 200 [2018-10-27 04:23:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:23:32,344 INFO L225 Difference]: With dead ends: 16176 [2018-10-27 04:23:32,345 INFO L226 Difference]: Without dead ends: 8277 [2018-10-27 04:23:32,384 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 208 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2018-10-27 04:23:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2018-10-27 04:23:32,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8274. [2018-10-27 04:23:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2018-10-27 04:23:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12224 transitions. [2018-10-27 04:23:32,601 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12224 transitions. Word has length 200 [2018-10-27 04:23:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:23:32,601 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12224 transitions. [2018-10-27 04:23:32,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-27 04:23:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12224 transitions. [2018-10-27 04:23:32,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-27 04:23:32,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:23:32,618 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 04:23:32,618 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:23:32,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:32,619 INFO L82 PathProgramCache]: Analyzing trace with hash -972171771, now seen corresponding path program 1 times [2018-10-27 04:23:32,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:23:32,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:32,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:32,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:32,620 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:23:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 04:23:32,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:32,837 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:23:32,837 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 201 with the following transitions: [2018-10-27 04:23:32,837 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [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], [685], [687], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 04:23:32,843 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 04:23:32,843 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:23:33,769 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:23:33,770 INFO L272 AbstractInterpreter]: Visited 158 different actions 308 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 04:23:33,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:33,777 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:23:33,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:33,777 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:23:33,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:33,787 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:23:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:33,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:23:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 04:23:34,063 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:23:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 04:23:34,165 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 04:23:34,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-27 04:23:34,165 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:23:34,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:23:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:23:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 04:23:34,166 INFO L87 Difference]: Start difference. First operand 8274 states and 12224 transitions. Second operand 3 states. [2018-10-27 04:23:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:23:36,225 INFO L93 Difference]: Finished difference Result 23168 states and 35721 transitions. [2018-10-27 04:23:36,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:23:36,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 200 [2018-10-27 04:23:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:23:36,327 INFO L225 Difference]: With dead ends: 23168 [2018-10-27 04:23:36,328 INFO L226 Difference]: Without dead ends: 15108 [2018-10-27 04:23:36,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 398 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 04:23:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15108 states. [2018-10-27 04:23:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15108 to 15080. [2018-10-27 04:23:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15080 states. [2018-10-27 04:23:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15080 states to 15080 states and 22901 transitions. [2018-10-27 04:23:36,778 INFO L78 Accepts]: Start accepts. Automaton has 15080 states and 22901 transitions. Word has length 200 [2018-10-27 04:23:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:23:36,778 INFO L481 AbstractCegarLoop]: Abstraction has 15080 states and 22901 transitions. [2018-10-27 04:23:36,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:23:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 15080 states and 22901 transitions. [2018-10-27 04:23:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-27 04:23:36,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:23:36,805 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-27 04:23:36,805 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:23:36,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash -491365125, now seen corresponding path program 1 times [2018-10-27 04:23:36,806 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:23:36,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:36,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:36,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:36,807 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:23:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 72 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 04:23:37,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:37,314 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:23:37,314 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2018-10-27 04:23:37,315 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [20], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [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], [685], [687], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 04:23:37,321 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 04:23:37,322 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:23:38,176 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:23:38,177 INFO L272 AbstractInterpreter]: Visited 159 different actions 316 times. Merged at 7 different actions 10 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 04:23:38,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:38,212 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:23:38,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:38,213 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:23:38,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:38,230 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:23:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:38,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:23:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-27 04:23:38,631 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:23:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-27 04:23:38,827 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 04:23:38,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-10-27 04:23:38,828 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 04:23:38,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 04:23:38,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 04:23:38,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 04:23:38,830 INFO L87 Difference]: Start difference. First operand 15080 states and 22901 transitions. Second operand 3 states. [2018-10-27 04:23:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:23:40,454 INFO L93 Difference]: Finished difference Result 29868 states and 45784 transitions. [2018-10-27 04:23:40,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 04:23:40,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2018-10-27 04:23:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:23:40,579 INFO L225 Difference]: With dead ends: 29868 [2018-10-27 04:23:40,579 INFO L226 Difference]: Without dead ends: 19489 [2018-10-27 04:23:40,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 420 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-27 04:23:40,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19489 states. [2018-10-27 04:23:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19489 to 19484. [2018-10-27 04:23:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19484 states. [2018-10-27 04:23:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19484 states to 19484 states and 29601 transitions. [2018-10-27 04:23:41,077 INFO L78 Accepts]: Start accepts. Automaton has 19484 states and 29601 transitions. Word has length 211 [2018-10-27 04:23:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:23:41,078 INFO L481 AbstractCegarLoop]: Abstraction has 19484 states and 29601 transitions. [2018-10-27 04:23:41,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 04:23:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19484 states and 29601 transitions. [2018-10-27 04:23:41,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-10-27 04:23:41,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:23:41,145 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:41,145 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:23:41,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1260389909, now seen corresponding path program 1 times [2018-10-27 04:23:41,146 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:23:41,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:41,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:41,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:41,147 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:23:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 142 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 04:23:41,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:41,645 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:23:41,645 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 282 with the following transitions: [2018-10-27 04:23:41,645 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [68], [73], [75], [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], [342], [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], [685], [687], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 04:23:41,650 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 04:23:41,651 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:23:42,909 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:23:42,910 INFO L272 AbstractInterpreter]: Visited 159 different actions 471 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 04:23:42,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:42,920 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:23:42,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:42,920 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:23:42,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:42,930 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:23:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:43,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:23:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 04:23:43,472 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:23:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 04:23:43,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:23:43,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 04:23:43,731 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:23:43,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 04:23:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 04:23:43,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-27 04:23:43,733 INFO L87 Difference]: Start difference. First operand 19484 states and 29601 transitions. Second operand 9 states. [2018-10-27 04:23:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:23:47,958 INFO L93 Difference]: Finished difference Result 74579 states and 127001 transitions. [2018-10-27 04:23:47,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 04:23:47,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 281 [2018-10-27 04:23:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:23:48,331 INFO L225 Difference]: With dead ends: 74579 [2018-10-27 04:23:48,331 INFO L226 Difference]: Without dead ends: 55520 [2018-10-27 04:23:48,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 562 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-10-27 04:23:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55520 states. [2018-10-27 04:23:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55520 to 54976. [2018-10-27 04:23:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54976 states. [2018-10-27 04:23:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54976 states to 54976 states and 85648 transitions. [2018-10-27 04:23:49,853 INFO L78 Accepts]: Start accepts. Automaton has 54976 states and 85648 transitions. Word has length 281 [2018-10-27 04:23:49,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:23:49,854 INFO L481 AbstractCegarLoop]: Abstraction has 54976 states and 85648 transitions. [2018-10-27 04:23:49,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 04:23:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 54976 states and 85648 transitions. [2018-10-27 04:23:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-27 04:23:49,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:23:49,950 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:23:49,951 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:23:49,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:49,951 INFO L82 PathProgramCache]: Analyzing trace with hash 267997470, now seen corresponding path program 1 times [2018-10-27 04:23:49,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:23:49,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:49,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:49,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:23:49,952 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:23:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:50,623 WARN L179 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2018-10-27 04:23:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 175 proven. 8 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-27 04:23:50,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:50,853 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:23:50,854 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 314 with the following transitions: [2018-10-27 04:23:50,854 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [174], [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], [342], [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], [685], [687], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 04:23:50,859 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 04:23:50,860 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:23:52,177 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:23:52,177 INFO L272 AbstractInterpreter]: Visited 162 different actions 645 times. Merged at 8 different actions 33 times. Never widened. Found 7 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 04:23:52,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:23:52,187 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:23:52,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:23:52,187 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:23:52,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:23:52,195 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:23:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:23:52,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:23:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-10-27 04:23:52,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:23:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 175 proven. 8 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-27 04:23:53,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:23:53,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-10-27 04:23:53,641 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:23:53,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 04:23:53,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 04:23:53,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-27 04:23:53,642 INFO L87 Difference]: Start difference. First operand 54976 states and 85648 transitions. Second operand 8 states. [2018-10-27 04:24:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:24:02,443 INFO L93 Difference]: Finished difference Result 194551 states and 358691 transitions. [2018-10-27 04:24:02,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-27 04:24:02,444 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 313 [2018-10-27 04:24:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:24:03,591 INFO L225 Difference]: With dead ends: 194551 [2018-10-27 04:24:03,591 INFO L226 Difference]: Without dead ends: 140000 [2018-10-27 04:24:03,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 646 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2018-10-27 04:24:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140000 states. [2018-10-27 04:24:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140000 to 133967. [2018-10-27 04:24:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133967 states. [2018-10-27 04:24:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133967 states to 133967 states and 194994 transitions. [2018-10-27 04:24:08,126 INFO L78 Accepts]: Start accepts. Automaton has 133967 states and 194994 transitions. Word has length 313 [2018-10-27 04:24:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:24:08,126 INFO L481 AbstractCegarLoop]: Abstraction has 133967 states and 194994 transitions. [2018-10-27 04:24:08,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 04:24:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 133967 states and 194994 transitions. [2018-10-27 04:24:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-27 04:24:08,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:24:08,338 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:24:08,339 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:24:08,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:24:08,339 INFO L82 PathProgramCache]: Analyzing trace with hash 792093393, now seen corresponding path program 1 times [2018-10-27 04:24:08,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:24:08,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:24:08,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:24:08,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:24:08,341 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:24:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:24:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 195 proven. 75 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 04:24:08,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:24:08,662 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:24:08,662 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 335 with the following transitions: [2018-10-27 04:24:08,663 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [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], [315], [320], [322], [323], [327], [331], [335], [339], [342], [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], [685], [687], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 04:24:08,667 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 04:24:08,667 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:24:09,512 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:24:09,512 INFO L272 AbstractInterpreter]: Visited 159 different actions 471 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 04:24:09,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:24:09,524 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:24:09,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:24:09,524 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:24:09,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:24:09,534 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:24:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:24:09,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:24:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-27 04:24:09,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:24:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 195 proven. 75 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 04:24:10,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:24:10,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-10-27 04:24:10,412 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:24:10,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-27 04:24:10,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-27 04:24:10,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-10-27 04:24:10,414 INFO L87 Difference]: Start difference. First operand 133967 states and 194994 transitions. Second operand 10 states. [2018-10-27 04:24:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:24:28,142 INFO L93 Difference]: Finished difference Result 439369 states and 741852 transitions. [2018-10-27 04:24:28,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-27 04:24:28,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 334 [2018-10-27 04:24:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:24:30,909 INFO L225 Difference]: With dead ends: 439369 [2018-10-27 04:24:30,910 INFO L226 Difference]: Without dead ends: 305827 [2018-10-27 04:24:31,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 705 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2018-10-27 04:24:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305827 states. [2018-10-27 04:24:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305827 to 291601. [2018-10-27 04:24:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291601 states. [2018-10-27 04:24:46,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291601 states to 291601 states and 396860 transitions. [2018-10-27 04:24:46,369 INFO L78 Accepts]: Start accepts. Automaton has 291601 states and 396860 transitions. Word has length 334 [2018-10-27 04:24:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 04:24:46,369 INFO L481 AbstractCegarLoop]: Abstraction has 291601 states and 396860 transitions. [2018-10-27 04:24:46,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-27 04:24:46,369 INFO L276 IsEmpty]: Start isEmpty. Operand 291601 states and 396860 transitions. [2018-10-27 04:24:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-27 04:24:46,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 04:24:46,637 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:24:46,637 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 04:24:46,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:24:46,637 INFO L82 PathProgramCache]: Analyzing trace with hash 988021279, now seen corresponding path program 1 times [2018-10-27 04:24:46,637 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 04:24:46,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:24:46,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:24:46,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 04:24:46,639 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 04:24:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:24:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 194 proven. 8 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-27 04:24:47,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:24:47,205 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 04:24:47,206 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 347 with the following transitions: [2018-10-27 04:24:47,206 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [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], [342], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [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], [685], [687], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 04:24:47,211 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 04:24:47,211 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 04:24:48,335 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 04:24:48,335 INFO L272 AbstractInterpreter]: Visited 159 different actions 475 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 04:24:48,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 04:24:48,344 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 04:24:48,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 04:24:48,344 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 04:24:48,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 04:24:48,352 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 04:24:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 04:24:48,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 04:24:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 273 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-27 04:24:48,748 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 04:24:49,724 WARN L179 SmtUtils]: Spent 945.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-27 04:24:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 273 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-27 04:24:50,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 04:24:50,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-10-27 04:24:50,080 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 04:24:50,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 04:24:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 04:24:50,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-27 04:24:50,082 INFO L87 Difference]: Start difference. First operand 291601 states and 396860 transitions. Second operand 8 states. [2018-10-27 04:24:55,551 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-27 04:25:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 04:25:14,339 INFO L93 Difference]: Finished difference Result 842629 states and 1292640 transitions. [2018-10-27 04:25:14,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-27 04:25:14,339 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 346 [2018-10-27 04:25:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 04:25:17,244 INFO L225 Difference]: With dead ends: 842629 [2018-10-27 04:25:17,244 INFO L226 Difference]: Without dead ends: 556258 [2018-10-27 04:25:19,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 727 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2018-10-27 04:25:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556258 states. [2018-10-27 04:25:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556258 to 528804. [2018-10-27 04:25:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528804 states. Received shutdown request... [2018-10-27 04:25:49,844 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 04:25:49,850 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 04:25:49,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:25:49 BoogieIcfgContainer [2018-10-27 04:25:49,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 04:25:49,851 INFO L168 Benchmark]: Toolchain (without parser) took 205760.18 ms. Allocated memory was 1.5 GB in the beginning and 7.0 GB in the end (delta: 5.4 GB). Free memory was 1.4 GB in the beginning and 4.1 GB in the end (delta: -2.6 GB). Peak memory consumption was 5.1 GB. Max. memory is 7.1 GB. [2018-10-27 04:25:49,852 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 04:25:49,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1117.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-27 04:25:49,854 INFO L168 Benchmark]: Boogie Procedure Inliner took 314.59 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -891.1 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. [2018-10-27 04:25:49,855 INFO L168 Benchmark]: Boogie Preprocessor took 124.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2018-10-27 04:25:49,855 INFO L168 Benchmark]: RCFGBuilder took 5258.49 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 247.4 MB). Peak memory consumption was 247.4 MB. Max. memory is 7.1 GB. [2018-10-27 04:25:49,857 INFO L168 Benchmark]: TraceAbstraction took 198939.82 ms. Allocated memory was 2.3 GB in the beginning and 7.0 GB in the end (delta: 4.7 GB). Free memory was 2.0 GB in the beginning and 4.1 GB in the end (delta: -2.1 GB). Peak memory consumption was 4.9 GB. Max. memory is 7.1 GB. [2018-10-27 04:25:49,864 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1117.23 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 314.59 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -891.1 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.66 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5258.49 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 247.4 MB). Peak memory consumption was 247.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 198939.82 ms. Allocated memory was 2.3 GB in the beginning and 7.0 GB in the end (delta: 4.7 GB). Free memory was 2.0 GB in the beginning and 4.1 GB in the end (delta: -2.1 GB). Peak memory consumption was 4.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1473]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1473). Cancelled while ReachableStatesComputation was computing reachable states (526791 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 198.8s OverallTime, 11 OverallIterations, 5 TraceHistogramMax, 119.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3492 SDtfs, 18053 SDslu, 4340 SDs, 0 SdLazy, 33756 SolverSat, 6456 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 51.7s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 4454 GetRequests, 4205 SyntacticMatches, 9 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=291601occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.7s AbstIntTime, 9 AbstIntIterations, 2 AbstIntStrong, 0.998934635837247 AbsIntWeakeningRatio, 0.3253333333333333 AbsIntAvgWeakeningVarsNumRemoved, 56.25333333333333 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 53.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 21226 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 4438 NumberOfCodeBlocks, 4438 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 6284 ConstructedInterpolants, 0 QuantifiedInterpolants, 3400807 SizeOfPredicates, 32 NumberOfNonLiveVariables, 8535 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 25 InterpolantComputations, 6 PerfectInterpolantSequences, 3486/3716 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown