java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:39:43,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:39:43,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:39:43,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 20:39:43,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 20:39:43,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 20:39:43,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 20:39:43,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 20:39:43,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 20:39:43,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 20:39:43,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 20:39:43,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 20:39:43,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 20:39:43,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 20:39:43,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 20:39:43,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 20:39:43,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 20:39:43,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 20:39:43,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 20:39:43,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 20:39:43,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 20:39:43,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 20:39:43,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 20:39:43,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 20:39:43,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 20:39:43,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 20:39:43,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 20:39:43,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 20:39:43,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 20:39:43,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 20:39:43,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 20:39:43,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 20:39:43,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 20:39:43,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 20:39:43,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 20:39:43,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 20:39:43,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 20:39:43,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 20:39:43,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:39:43,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:39:43,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:39:43,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 20:39:43,155 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:39:43,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:39:43,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:39:43,156 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:39:43,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:39:43,157 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:39:43,157 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:39:43,157 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:39:43,157 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:39:43,158 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:39:43,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:39:43,158 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:39:43,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:39:43,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:39:43,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:39:43,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:39:43,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:39:43,160 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:39:43,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:39:43,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:39:43,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:39:43,160 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:39:43,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:39:43,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:39:43,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:39:43,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:39:43,161 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:39:43,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:39:43,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:39:43,162 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:39:43,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:39:43,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:39:43,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:39:43,229 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:39:43,229 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:39:43,230 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label52.c [2019-09-09 20:39:43,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ee80193/02b6dacbbfdd4d63b5f9ce2127c907bb/FLAG77c7fe717 [2019-09-09 20:39:43,943 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:39:43,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label52.c [2019-09-09 20:39:43,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ee80193/02b6dacbbfdd4d63b5f9ce2127c907bb/FLAG77c7fe717 [2019-09-09 20:39:44,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4ee80193/02b6dacbbfdd4d63b5f9ce2127c907bb [2019-09-09 20:39:44,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:39:44,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:39:44,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:39:44,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:39:44,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:39:44,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:39:44" (1/1) ... [2019-09-09 20:39:44,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779b0c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:44, skipping insertion in model container [2019-09-09 20:39:44,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:39:44" (1/1) ... [2019-09-09 20:39:44,191 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:39:44,269 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:39:45,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:39:45,050 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:39:45,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:39:45,275 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:39:45,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45 WrapperNode [2019-09-09 20:39:45,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:39:45,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:39:45,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:39:45,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:39:45,299 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45" (1/1) ... [2019-09-09 20:39:45,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45" (1/1) ... [2019-09-09 20:39:45,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45" (1/1) ... [2019-09-09 20:39:45,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45" (1/1) ... [2019-09-09 20:39:45,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45" (1/1) ... [2019-09-09 20:39:45,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45" (1/1) ... [2019-09-09 20:39:45,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45" (1/1) ... [2019-09-09 20:39:45,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:39:45,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:39:45,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:39:45,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:39:45,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45" (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 [2019-09-09 20:39:45,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:39:45,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:39:45,621 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:39:45,622 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:39:45,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:39:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:39:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:39:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:39:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:39:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:39:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:39:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:39:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:39:48,079 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:39:48,080 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:39:48,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:39:48 BoogieIcfgContainer [2019-09-09 20:39:48,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:39:48,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:39:48,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:39:48,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:39:48,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:39:44" (1/3) ... [2019-09-09 20:39:48,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6c1f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:39:48, skipping insertion in model container [2019-09-09 20:39:48,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:39:45" (2/3) ... [2019-09-09 20:39:48,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6c1f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:39:48, skipping insertion in model container [2019-09-09 20:39:48,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:39:48" (3/3) ... [2019-09-09 20:39:48,096 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label52.c [2019-09-09 20:39:48,107 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:39:48,119 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:39:48,136 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:39:48,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:39:48,166 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:39:48,167 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:39:48,167 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:39:48,167 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:39:48,167 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:39:48,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:39:48,167 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:39:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 20:39:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-09 20:39:48,223 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:39:48,225 INFO L399 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] [2019-09-09 20:39:48,227 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:39:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:39:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash -68518782, now seen corresponding path program 1 times [2019-09-09 20:39:48,236 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:39:48,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:48,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:39:48,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:48,290 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:39:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:39:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:39:48,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:39:48,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 20:39:48,602 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:39:48,607 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 20:39:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 20:39:48,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:39:48,626 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-09-09 20:39:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:39:51,222 INFO L93 Difference]: Finished difference Result 750 states and 1299 transitions. [2019-09-09 20:39:51,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 20:39:51,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2019-09-09 20:39:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:39:51,249 INFO L225 Difference]: With dead ends: 750 [2019-09-09 20:39:51,249 INFO L226 Difference]: Without dead ends: 682 [2019-09-09 20:39:51,251 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:39:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-09-09 20:39:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-09-09 20:39:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 20:39:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-09-09 20:39:51,363 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 35 [2019-09-09 20:39:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:39:51,364 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-09-09 20:39:51,364 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 20:39:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-09-09 20:39:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-09 20:39:51,370 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:39:51,370 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:39:51,371 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:39:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:39:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1853663086, now seen corresponding path program 1 times [2019-09-09 20:39:51,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:39:51,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:51,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:39:51,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:51,373 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:39:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:39:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:39:51,631 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:39:51,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:39:51,632 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:39:51,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:39:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:39:51,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:39:51,636 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-09-09 20:39:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:39:54,451 INFO L93 Difference]: Finished difference Result 1054 states and 1724 transitions. [2019-09-09 20:39:54,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:39:54,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-09-09 20:39:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:39:54,461 INFO L225 Difference]: With dead ends: 1054 [2019-09-09 20:39:54,461 INFO L226 Difference]: Without dead ends: 1054 [2019-09-09 20:39:54,462 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 20:39:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-09-09 20:39:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-09-09 20:39:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-09-09 20:39:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-09-09 20:39:54,515 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 127 [2019-09-09 20:39:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:39:54,519 INFO L475 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-09-09 20:39:54,519 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:39:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-09-09 20:39:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-09-09 20:39:54,530 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:39:54,531 INFO L399 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 20:39:54,531 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:39:54,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:39:54,532 INFO L82 PathProgramCache]: Analyzing trace with hash -651275874, now seen corresponding path program 1 times [2019-09-09 20:39:54,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:39:54,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:54,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:39:54,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:39:54,535 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:39:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:39:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 56 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 20:39:54,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:39:54,736 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:39:54,737 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 238 with the following transitions: [2019-09-09 20:39:54,739 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [367], [369], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [764], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 20:39:54,804 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:39:54,804 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:40:01,155 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:40:01,158 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Performed 269 root evaluator evaluations with a maximum evaluation depth of 14. Performed 269 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 20:40:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:40:01,165 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:40:07,972 INFO L227 lantSequenceWeakener]: Weakened 218 states. On average, predicates are now at 77.76% of their original sizes. [2019-09-09 20:40:07,972 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:40:08,083 INFO L420 sIntCurrentIteration]: We unified 236 AI predicates to 236 [2019-09-09 20:40:08,083 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:40:08,084 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:40:08,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 20:40:08,088 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:40:08,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 20:40:08,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 20:40:08,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 20:40:08,091 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 11 states. [2019-09-09 20:40:26,905 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.