java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label59_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 03:22:49,201 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 03:22:49,203 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 03:22:49,216 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 03:22:49,216 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 03:22:49,217 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 03:22:49,219 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 03:22:49,221 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 03:22:49,222 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 03:22:49,223 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 03:22:49,224 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 03:22:49,225 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 03:22:49,225 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 03:22:49,226 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 03:22:49,228 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 03:22:49,228 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 03:22:49,229 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 03:22:49,231 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 03:22:49,233 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 03:22:49,235 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 03:22:49,236 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 03:22:49,238 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 03:22:49,241 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-07 03:22:49,249 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 03:22:49,249 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 03:22:49,253 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 03:22:49,254 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 03:22:49,254 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-11-07 03:22:49,284 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 03:22:49,285 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 03:22:49,286 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 03:22:49,286 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 03:22:49,287 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 03:22:49,287 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 03:22:49,287 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 03:22:49,287 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 03:22:49,288 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 03:22:49,288 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 03:22:49,288 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 03:22:49,289 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 03:22:49,290 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 03:22:49,290 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 03:22:49,290 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 03:22:49,290 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 03:22:49,290 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 03:22:49,292 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 03:22:49,292 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 03:22:49,292 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 03:22:49,292 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 03:22:49,293 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 03:22:49,293 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 03:22:49,293 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 03:22:49,293 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 03:22:49,293 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 03:22:49,294 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 03:22:49,294 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 03:22:49,294 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 03:22:49,295 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 03:22:49,295 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 03:22:49,295 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 03:22:49,295 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 03:22:49,295 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 03:22:49,364 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 03:22:49,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 03:22:49,387 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 03:22:49,389 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 03:22:49,390 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 03:22:49,390 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label59_true-unreach-call.c [2018-11-07 03:22:49,454 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3b054d8/038ce64e29d24afc8911aa7b2523682e/FLAG344c44132 [2018-11-07 03:22:50,280 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 03:22:50,281 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label59_true-unreach-call.c [2018-11-07 03:22:50,330 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3b054d8/038ce64e29d24afc8911aa7b2523682e/FLAG344c44132 [2018-11-07 03:22:50,352 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3b054d8/038ce64e29d24afc8911aa7b2523682e [2018-11-07 03:22:50,367 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 03:22:50,369 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 03:22:50,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 03:22:50,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 03:22:50,379 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 03:22:50,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:22:50" (1/1) ... [2018-11-07 03:22:50,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c01c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:50, skipping insertion in model container [2018-11-07 03:22:50,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:22:50" (1/1) ... [2018-11-07 03:22:50,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 03:22:50,576 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 03:22:52,127 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 03:22:52,133 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 03:22:52,914 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 03:22:52,956 INFO L193 MainTranslator]: Completed translation [2018-11-07 03:22:52,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52 WrapperNode [2018-11-07 03:22:52,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 03:22:52,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 03:22:52,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 03:22:52,958 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 03:22:52,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... [2018-11-07 03:22:53,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... [2018-11-07 03:22:53,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 03:22:53,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 03:22:53,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 03:22:53,387 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 03:22:53,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... [2018-11-07 03:22:53,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... [2018-11-07 03:22:53,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... [2018-11-07 03:22:53,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... [2018-11-07 03:22:53,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... [2018-11-07 03:22:53,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... [2018-11-07 03:22:53,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... [2018-11-07 03:22:53,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 03:22:53,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 03:22:53,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 03:22:53,659 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 03:22:53,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 03:22:53,735 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 03:22:53,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 03:22:53,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 03:22:53,736 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-11-07 03:22:53,736 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-11-07 03:22:53,737 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-11-07 03:22:53,737 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-11-07 03:22:53,737 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 03:22:53,737 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 03:22:53,738 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 03:22:53,738 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 03:22:53,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 03:22:53,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 03:22:53,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 03:22:53,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 03:23:03,783 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 03:23:03,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:23:03 BoogieIcfgContainer [2018-11-07 03:23:03,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 03:23:03,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 03:23:03,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 03:23:03,789 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 03:23:03,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:22:50" (1/3) ... [2018-11-07 03:23:03,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cd8fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:23:03, skipping insertion in model container [2018-11-07 03:23:03,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:22:52" (2/3) ... [2018-11-07 03:23:03,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cd8fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:23:03, skipping insertion in model container [2018-11-07 03:23:03,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:23:03" (3/3) ... [2018-11-07 03:23:03,793 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label59_true-unreach-call.c [2018-11-07 03:23:03,804 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 03:23:03,815 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 03:23:03,833 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 03:23:03,882 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 03:23:03,883 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 03:23:03,883 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 03:23:03,883 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 03:23:03,883 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 03:23:03,884 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 03:23:03,884 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 03:23:03,884 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 03:23:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-11-07 03:23:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-07 03:23:03,937 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 03:23:03,938 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] [2018-11-07 03:23:03,944 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 03:23:03,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 03:23:03,953 INFO L82 PathProgramCache]: Analyzing trace with hash -760463861, now seen corresponding path program 1 times [2018-11-07 03:23:03,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 03:23:04,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:23:04,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 03:23:04,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:23:04,009 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 03:23:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 03:23:04,540 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-11-07 03:23:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 03:23:04,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 03:23:04,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 03:23:04,592 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 03:23:04,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 03:23:04,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 03:23:04,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 03:23:04,626 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 4 states. [2018-11-07 03:23:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 03:23:17,379 INFO L93 Difference]: Finished difference Result 4065 states and 7606 transitions. [2018-11-07 03:23:17,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 03:23:17,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2018-11-07 03:23:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 03:23:17,444 INFO L225 Difference]: With dead ends: 4065 [2018-11-07 03:23:17,444 INFO L226 Difference]: Without dead ends: 2939 [2018-11-07 03:23:17,466 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 03:23:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2018-11-07 03:23:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 1972. [2018-11-07 03:23:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1972 states. [2018-11-07 03:23:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 3594 transitions. [2018-11-07 03:23:17,650 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 3594 transitions. Word has length 53 [2018-11-07 03:23:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 03:23:17,651 INFO L480 AbstractCegarLoop]: Abstraction has 1972 states and 3594 transitions. [2018-11-07 03:23:17,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 03:23:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 3594 transitions. [2018-11-07 03:23:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-07 03:23:17,658 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 03:23:17,659 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 03:23:17,659 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 03:23:17,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 03:23:17,660 INFO L82 PathProgramCache]: Analyzing trace with hash 9264363, now seen corresponding path program 1 times [2018-11-07 03:23:17,660 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 03:23:17,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:23:17,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 03:23:17,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:23:17,662 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 03:23:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 03:23:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 03:23:18,110 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 03:23:18,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 03:23:18,111 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 03:23:18,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 03:23:18,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 03:23:18,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 03:23:18,114 INFO L87 Difference]: Start difference. First operand 1972 states and 3594 transitions. Second operand 6 states. [2018-11-07 03:23:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 03:23:33,144 INFO L93 Difference]: Finished difference Result 7229 states and 13602 transitions. [2018-11-07 03:23:33,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 03:23:33,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2018-11-07 03:23:33,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 03:23:33,189 INFO L225 Difference]: With dead ends: 7229 [2018-11-07 03:23:33,189 INFO L226 Difference]: Without dead ends: 5263 [2018-11-07 03:23:33,204 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 03:23:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2018-11-07 03:23:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 5234. [2018-11-07 03:23:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5234 states. [2018-11-07 03:23:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 8445 transitions. [2018-11-07 03:23:33,482 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 8445 transitions. Word has length 126 [2018-11-07 03:23:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 03:23:33,483 INFO L480 AbstractCegarLoop]: Abstraction has 5234 states and 8445 transitions. [2018-11-07 03:23:33,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 03:23:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 8445 transitions. [2018-11-07 03:23:33,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-11-07 03:23:33,498 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 03:23:33,498 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 03:23:33,499 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 03:23:33,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 03:23:33,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1015447532, now seen corresponding path program 1 times [2018-11-07 03:23:33,500 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 03:23:33,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:23:33,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 03:23:33,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:23:33,501 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 03:23:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 03:23:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 03:23:33,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 03:23:33,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 03:23:33,790 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 03:23:33,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 03:23:33,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 03:23:33,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 03:23:33,792 INFO L87 Difference]: Start difference. First operand 5234 states and 8445 transitions. Second operand 5 states. [2018-11-07 03:23:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 03:23:43,940 INFO L93 Difference]: Finished difference Result 15737 states and 26179 transitions. [2018-11-07 03:23:43,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 03:23:43,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2018-11-07 03:23:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 03:23:44,011 INFO L225 Difference]: With dead ends: 15737 [2018-11-07 03:23:44,012 INFO L226 Difference]: Without dead ends: 10509 [2018-11-07 03:23:44,037 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 03:23:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10509 states. [2018-11-07 03:23:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10509 to 10304. [2018-11-07 03:23:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10304 states. [2018-11-07 03:23:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10304 states to 10304 states and 15523 transitions. [2018-11-07 03:23:44,574 INFO L78 Accepts]: Start accepts. Automaton has 10304 states and 15523 transitions. Word has length 152 [2018-11-07 03:23:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 03:23:44,575 INFO L480 AbstractCegarLoop]: Abstraction has 10304 states and 15523 transitions. [2018-11-07 03:23:44,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 03:23:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 10304 states and 15523 transitions. [2018-11-07 03:23:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-11-07 03:23:44,581 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 03:23:44,581 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 03:23:44,581 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 03:23:44,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 03:23:44,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1469910122, now seen corresponding path program 1 times [2018-11-07 03:23:44,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 03:23:44,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:23:44,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 03:23:44,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:23:44,584 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 03:23:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 03:23:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 03:23:44,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 03:23:44,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 03:23:44,948 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 03:23:44,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 03:23:44,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 03:23:44,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 03:23:44,950 INFO L87 Difference]: Start difference. First operand 10304 states and 15523 transitions. Second operand 5 states. [2018-11-07 03:24:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 03:24:00,670 INFO L93 Difference]: Finished difference Result 32096 states and 50254 transitions. [2018-11-07 03:24:00,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 03:24:00,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2018-11-07 03:24:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 03:24:00,769 INFO L225 Difference]: With dead ends: 32096 [2018-11-07 03:24:00,769 INFO L226 Difference]: Without dead ends: 21798 [2018-11-07 03:24:00,814 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 03:24:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21798 states. [2018-11-07 03:24:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21798 to 21580. [2018-11-07 03:24:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21580 states. [2018-11-07 03:24:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21580 states to 21580 states and 31838 transitions. [2018-11-07 03:24:01,316 INFO L78 Accepts]: Start accepts. Automaton has 21580 states and 31838 transitions. Word has length 159 [2018-11-07 03:24:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 03:24:01,317 INFO L480 AbstractCegarLoop]: Abstraction has 21580 states and 31838 transitions. [2018-11-07 03:24:01,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 03:24:01,317 INFO L276 IsEmpty]: Start isEmpty. Operand 21580 states and 31838 transitions. [2018-11-07 03:24:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-11-07 03:24:01,322 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 03:24:01,323 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 03:24:01,323 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 03:24:01,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 03:24:01,323 INFO L82 PathProgramCache]: Analyzing trace with hash 581276394, now seen corresponding path program 1 times [2018-11-07 03:24:01,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 03:24:01,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:24:01,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 03:24:01,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:24:01,325 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 03:24:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 03:24:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 03:24:01,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 03:24:01,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 03:24:01,514 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 03:24:01,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 03:24:01,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 03:24:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 03:24:01,517 INFO L87 Difference]: Start difference. First operand 21580 states and 31838 transitions. Second operand 3 states. [2018-11-07 03:24:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 03:24:07,574 INFO L93 Difference]: Finished difference Result 43156 states and 63836 transitions. [2018-11-07 03:24:07,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 03:24:07,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2018-11-07 03:24:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 03:24:07,651 INFO L225 Difference]: With dead ends: 43156 [2018-11-07 03:24:07,652 INFO L226 Difference]: Without dead ends: 21582 [2018-11-07 03:24:07,693 INFO L604 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 [2018-11-07 03:24:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21582 states. [2018-11-07 03:24:08,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21582 to 21580. [2018-11-07 03:24:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21580 states. [2018-11-07 03:24:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21580 states to 21580 states and 29362 transitions. [2018-11-07 03:24:08,101 INFO L78 Accepts]: Start accepts. Automaton has 21580 states and 29362 transitions. Word has length 169 [2018-11-07 03:24:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 03:24:08,101 INFO L480 AbstractCegarLoop]: Abstraction has 21580 states and 29362 transitions. [2018-11-07 03:24:08,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 03:24:08,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21580 states and 29362 transitions. [2018-11-07 03:24:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-07 03:24:08,106 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 03:24:08,106 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2018-11-07 03:24:08,107 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 03:24:08,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 03:24:08,107 INFO L82 PathProgramCache]: Analyzing trace with hash -936970546, now seen corresponding path program 1 times [2018-11-07 03:24:08,107 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 03:24:08,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:24:08,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 03:24:08,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:24:08,109 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 03:24:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 03:24:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 03:24:08,331 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 03:24:08,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 03:24:08,331 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 03:24:08,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 03:24:08,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 03:24:08,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 03:24:08,332 INFO L87 Difference]: Start difference. First operand 21580 states and 29362 transitions. Second operand 4 states. [2018-11-07 03:24:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 03:24:16,905 INFO L93 Difference]: Finished difference Result 63874 states and 92426 transitions. [2018-11-07 03:24:16,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 03:24:16,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2018-11-07 03:24:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 03:24:17,476 INFO L225 Difference]: With dead ends: 63874 [2018-11-07 03:24:17,476 INFO L226 Difference]: Without dead ends: 42300 [2018-11-07 03:24:17,534 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 03:24:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42300 states. [2018-11-07 03:24:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42300 to 42288. [2018-11-07 03:24:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42288 states. [2018-11-07 03:24:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42288 states to 42288 states and 58159 transitions. [2018-11-07 03:24:18,364 INFO L78 Accepts]: Start accepts. Automaton has 42288 states and 58159 transitions. Word has length 174 [2018-11-07 03:24:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 03:24:18,365 INFO L480 AbstractCegarLoop]: Abstraction has 42288 states and 58159 transitions. [2018-11-07 03:24:18,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 03:24:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 42288 states and 58159 transitions. [2018-11-07 03:24:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-07 03:24:18,380 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 03:24:18,380 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 03:24:18,381 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 03:24:18,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 03:24:18,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1840466883, now seen corresponding path program 1 times [2018-11-07 03:24:18,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 03:24:18,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:24:18,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 03:24:18,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 03:24:18,382 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 03:24:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 03:24:18,678 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 03:24:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 92 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 03:24:19,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 03:24:19,121 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 03:24:19,122 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-11-07 03:24:19,132 INFO L202 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2951], [2953], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3159], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3347], [3352], [3354], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-11-07 03:24:19,256 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-11-07 03:24:19,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 03:24:23,142 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 03:24:30,911 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 03:24:30,913 INFO L272 AbstractInterpreter]: Visited 123 different actions 123 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 03:24:30,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 03:24:30,930 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 03:24:36,414 INFO L227 lantSequenceWeakener]: Weakened 228 states. On average, predicates are now at 71.69% of their original sizes. [2018-11-07 03:24:36,414 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 03:24:37,958 INFO L415 sIntCurrentIteration]: We unified 250 AI predicates to 250 [2018-11-07 03:24:37,958 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 03:24:37,959 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 03:24:37,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-07 03:24:37,959 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 03:24:37,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 03:24:37,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 03:24:37,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-07 03:24:37,962 INFO L87 Difference]: Start difference. First operand 42288 states and 58159 transitions. Second operand 11 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown