java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label39_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 21:32:38,140 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 21:32:38,142 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 21:32:38,154 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 21:32:38,154 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 21:32:38,155 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 21:32:38,157 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 21:32:38,159 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 21:32:38,160 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 21:32:38,161 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 21:32:38,162 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 21:32:38,162 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 21:32:38,163 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 21:32:38,164 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 21:32:38,165 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 21:32:38,166 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 21:32:38,167 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 21:32:38,169 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 21:32:38,171 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 21:32:38,172 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 21:32:38,173 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 21:32:38,175 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 21:32:38,177 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 21:32:38,189 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 21:32:38,189 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 21:32:38,191 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 21:32:38,192 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 21:32:38,192 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 21:32:38,223 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 21:32:38,224 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 21:32:38,228 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 21:32:38,228 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 21:32:38,228 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 21:32:38,229 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 21:32:38,229 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 21:32:38,229 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 21:32:38,230 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 21:32:38,230 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 21:32:38,230 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 21:32:38,230 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 21:32:38,231 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 21:32:38,232 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 21:32:38,232 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 21:32:38,232 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 21:32:38,232 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 21:32:38,232 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 21:32:38,232 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 21:32:38,233 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 21:32:38,233 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 21:32:38,233 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 21:32:38,233 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 21:32:38,233 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 21:32:38,234 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 21:32:38,235 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 21:32:38,235 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 21:32:38,235 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 21:32:38,235 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 21:32:38,236 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 21:32:38,236 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 21:32:38,236 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 21:32:38,236 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 21:32:38,237 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 21:32:38,281 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 21:32:38,294 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 21:32:38,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 21:32:38,301 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 21:32:38,302 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 21:32:38,303 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label39_true-unreach-call.c [2018-10-24 21:32:38,381 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5c5176cb6/ff8b1517f1874e3d991ce8f2603e9ea6/FLAG253c5c652 [2018-10-24 21:32:39,180 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 21:32:39,181 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label39_true-unreach-call.c [2018-10-24 21:32:39,225 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5c5176cb6/ff8b1517f1874e3d991ce8f2603e9ea6/FLAG253c5c652 [2018-10-24 21:32:39,246 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/5c5176cb6/ff8b1517f1874e3d991ce8f2603e9ea6 [2018-10-24 21:32:39,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 21:32:39,261 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 21:32:39,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 21:32:39,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 21:32:39,268 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 21:32:39,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:32:39" (1/1) ... [2018-10-24 21:32:39,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b58897e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:39, skipping insertion in model container [2018-10-24 21:32:39,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 09:32:39" (1/1) ... [2018-10-24 21:32:39,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 21:32:39,488 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 21:32:41,036 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 21:32:41,042 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 21:32:41,741 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 21:32:41,775 INFO L193 MainTranslator]: Completed translation [2018-10-24 21:32:41,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41 WrapperNode [2018-10-24 21:32:41,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 21:32:41,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 21:32:41,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 21:32:41,777 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 21:32:41,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (1/1) ... [2018-10-24 21:32:41,869 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (1/1) ... [2018-10-24 21:32:42,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 21:32:42,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 21:32:42,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 21:32:42,358 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 21:32:42,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (1/1) ... [2018-10-24 21:32:42,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (1/1) ... [2018-10-24 21:32:42,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (1/1) ... [2018-10-24 21:32:42,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (1/1) ... [2018-10-24 21:32:42,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (1/1) ... [2018-10-24 21:32:42,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (1/1) ... [2018-10-24 21:32:42,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (1/1) ... [2018-10-24 21:32:42,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 21:32:42,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 21:32:42,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 21:32:42,825 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 21:32:42,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (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 [2018-10-24 21:32:42,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 21:32:42,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 21:32:42,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2018-10-24 21:32:42,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2018-10-24 21:32:42,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2018-10-24 21:32:42,904 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2018-10-24 21:32:42,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-24 21:32:42,904 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-24 21:32:42,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-24 21:32:42,904 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-24 21:32:42,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 21:32:42,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 21:32:42,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 21:32:42,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 21:32:54,472 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 21:32:54,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:32:54 BoogieIcfgContainer [2018-10-24 21:32:54,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 21:32:54,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 21:32:54,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 21:32:54,478 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 21:32:54,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 09:32:39" (1/3) ... [2018-10-24 21:32:54,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c067911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:32:54, skipping insertion in model container [2018-10-24 21:32:54,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 09:32:41" (2/3) ... [2018-10-24 21:32:54,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c067911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 09:32:54, skipping insertion in model container [2018-10-24 21:32:54,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 09:32:54" (3/3) ... [2018-10-24 21:32:54,482 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label39_true-unreach-call.c [2018-10-24 21:32:54,492 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 21:32:54,501 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 21:32:54,519 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 21:32:54,566 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 21:32:54,566 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 21:32:54,566 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 21:32:54,567 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 21:32:54,567 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 21:32:54,567 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 21:32:54,567 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 21:32:54,567 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 21:32:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states. [2018-10-24 21:32:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-24 21:32:54,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:32:54,622 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] [2018-10-24 21:32:54,624 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:32:54,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:32:54,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1706781300, now seen corresponding path program 1 times [2018-10-24 21:32:54,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:32:54,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:32:54,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:32:54,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:32:54,689 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:32:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:32:55,149 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 21:32:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:32:55,278 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:32:55,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 21:32:55,278 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:32:55,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 21:32:55,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 21:32:55,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 21:32:55,304 INFO L87 Difference]: Start difference. First operand 1120 states. Second operand 3 states. [2018-10-24 21:33:06,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:33:06,423 INFO L93 Difference]: Finished difference Result 3097 states and 5707 transitions. [2018-10-24 21:33:06,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 21:33:06,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2018-10-24 21:33:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:33:06,461 INFO L225 Difference]: With dead ends: 3097 [2018-10-24 21:33:06,462 INFO L226 Difference]: Without dead ends: 1975 [2018-10-24 21:33:06,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 21:33:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2018-10-24 21:33:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1974. [2018-10-24 21:33:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1974 states. [2018-10-24 21:33:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 3284 transitions. [2018-10-24 21:33:06,652 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 3284 transitions. Word has length 58 [2018-10-24 21:33:06,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:33:06,653 INFO L481 AbstractCegarLoop]: Abstraction has 1974 states and 3284 transitions. [2018-10-24 21:33:06,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 21:33:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 3284 transitions. [2018-10-24 21:33:06,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-24 21:33:06,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:33:06,668 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, 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] [2018-10-24 21:33:06,668 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:33:06,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:33:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash 865550532, now seen corresponding path program 1 times [2018-10-24 21:33:06,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:33:06,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:33:06,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:33:06,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:33:06,671 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:33:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:33:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:33:06,945 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:33:06,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 21:33:06,946 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:33:06,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 21:33:06,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 21:33:06,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 21:33:06,948 INFO L87 Difference]: Start difference. First operand 1974 states and 3284 transitions. Second operand 5 states. [2018-10-24 21:33:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:33:29,563 INFO L93 Difference]: Finished difference Result 5737 states and 9691 transitions. [2018-10-24 21:33:29,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 21:33:29,566 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2018-10-24 21:33:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:33:29,602 INFO L225 Difference]: With dead ends: 5737 [2018-10-24 21:33:29,602 INFO L226 Difference]: Without dead ends: 3769 [2018-10-24 21:33:29,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 21:33:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2018-10-24 21:33:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3685. [2018-10-24 21:33:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3685 states. [2018-10-24 21:33:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3685 states to 3685 states and 5659 transitions. [2018-10-24 21:33:29,748 INFO L78 Accepts]: Start accepts. Automaton has 3685 states and 5659 transitions. Word has length 134 [2018-10-24 21:33:29,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:33:29,749 INFO L481 AbstractCegarLoop]: Abstraction has 3685 states and 5659 transitions. [2018-10-24 21:33:29,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 21:33:29,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3685 states and 5659 transitions. [2018-10-24 21:33:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-24 21:33:29,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:33:29,763 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, 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] [2018-10-24 21:33:29,764 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:33:29,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:33:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1845926312, now seen corresponding path program 1 times [2018-10-24 21:33:29,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:33:29,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:33:29,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:33:29,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:33:29,767 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:33:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:33:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:33:30,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:33:30,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 21:33:30,107 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:33:30,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 21:33:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 21:33:30,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 21:33:30,108 INFO L87 Difference]: Start difference. First operand 3685 states and 5659 transitions. Second operand 5 states. [2018-10-24 21:34:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:34:06,271 INFO L93 Difference]: Finished difference Result 13662 states and 21760 transitions. [2018-10-24 21:34:06,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 21:34:06,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2018-10-24 21:34:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:34:06,336 INFO L225 Difference]: With dead ends: 13662 [2018-10-24 21:34:06,336 INFO L226 Difference]: Without dead ends: 9983 [2018-10-24 21:34:06,364 INFO L605 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 [2018-10-24 21:34:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9983 states. [2018-10-24 21:34:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9983 to 9793. [2018-10-24 21:34:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9793 states. [2018-10-24 21:34:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9793 states to 9793 states and 14501 transitions. [2018-10-24 21:34:06,650 INFO L78 Accepts]: Start accepts. Automaton has 9793 states and 14501 transitions. Word has length 148 [2018-10-24 21:34:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:34:06,651 INFO L481 AbstractCegarLoop]: Abstraction has 9793 states and 14501 transitions. [2018-10-24 21:34:06,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 21:34:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 9793 states and 14501 transitions. [2018-10-24 21:34:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-24 21:34:06,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:34:06,658 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, 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] [2018-10-24 21:34:06,658 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:34:06,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:34:06,658 INFO L82 PathProgramCache]: Analyzing trace with hash 150914948, now seen corresponding path program 1 times [2018-10-24 21:34:06,659 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:34:06,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:34:06,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:34:06,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:34:06,660 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:34:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:34:06,969 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-24 21:34:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:34:07,285 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 21:34:07,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 21:34:07,285 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:34:07,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 21:34:07,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 21:34:07,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-24 21:34:07,287 INFO L87 Difference]: Start difference. First operand 9793 states and 14501 transitions. Second operand 6 states. [2018-10-24 21:34:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 21:34:22,395 INFO L93 Difference]: Finished difference Result 34186 states and 53808 transitions. [2018-10-24 21:34:22,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 21:34:22,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2018-10-24 21:34:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 21:34:22,534 INFO L225 Difference]: With dead ends: 34186 [2018-10-24 21:34:22,534 INFO L226 Difference]: Without dead ends: 24399 [2018-10-24 21:34:22,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 21:34:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24399 states. [2018-10-24 21:34:23,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24399 to 24165. [2018-10-24 21:34:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24165 states. [2018-10-24 21:34:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24165 states to 24165 states and 34072 transitions. [2018-10-24 21:34:23,239 INFO L78 Accepts]: Start accepts. Automaton has 24165 states and 34072 transitions. Word has length 166 [2018-10-24 21:34:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 21:34:23,240 INFO L481 AbstractCegarLoop]: Abstraction has 24165 states and 34072 transitions. [2018-10-24 21:34:23,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 21:34:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 24165 states and 34072 transitions. [2018-10-24 21:34:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-24 21:34:23,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 21:34:23,247 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 21:34:23,247 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 21:34:23,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:34:23,248 INFO L82 PathProgramCache]: Analyzing trace with hash -660194316, now seen corresponding path program 1 times [2018-10-24 21:34:23,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 21:34:23,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:34:23,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 21:34:23,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 21:34:23,250 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 21:34:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 21:34:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 21:34:23,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 21:34:23,956 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 21:34:23,958 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 175 with the following transitions: [2018-10-24 21:34:23,960 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], [2955], [2963], [2971], [2979], [2987], [2991], [2993], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [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], [3332], [4238], [4242], [4246], [4252], [4256], [4258], [4269], [4270], [4271], [4273], [4274] [2018-10-24 21:34:24,054 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 21:34:24,054 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 21:34:30,345 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 21:34:30,365 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-24 21:34:30,367 INFO L272 AbstractInterpreter]: Visited 120 different actions 120 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-10-24 21:34:30,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 21:34:30,378 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-24 21:34:33,886 INFO L232 lantSequenceWeakener]: Weakened 159 states. On average, predicates are now at 72.21% of their original sizes. [2018-10-24 21:34:33,887 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-24 21:34:35,501 INFO L413 sIntCurrentIteration]: We have 173 unified AI predicates [2018-10-24 21:34:35,502 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-24 21:34:35,503 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 21:34:35,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-10-24 21:34:35,503 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 21:34:35,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 21:34:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 21:34:35,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-10-24 21:34:35,504 INFO L87 Difference]: Start difference. First operand 24165 states and 34072 transitions. Second operand 11 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown