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/Problem19_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:31:37,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:31:37,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:31:37,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 23:31:37,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 23:31:37,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 23:31:37,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 23:31:37,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 23:31:37,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 23:31:37,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 23:31:37,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 23:31:37,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 23:31:37,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 23:31:37,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 23:31:37,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 23:31:37,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 23:31:37,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 23:31:37,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 23:31:37,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 23:31:37,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 23:31:37,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 23:31:37,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 23:31:37,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 23:31:37,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 23:31:37,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 23:31:37,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 23:31:37,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 23:31:37,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 23:31:37,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 23:31:37,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 23:31:37,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:31:37,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:31:37,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:31:37,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:31:37,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:31:37,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:31:37,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:31:37,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:31:37,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:31:37,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:31:37,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:31:37,340 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 23:31:37,354 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:31:37,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:31:37,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:31:37,355 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:31:37,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:31:37,356 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:31:37,356 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:31:37,356 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:31:37,357 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:31:37,357 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:31:37,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:31:37,358 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:31:37,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:31:37,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:31:37,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:31:37,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:31:37,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:31:37,359 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:31:37,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:31:37,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:31:37,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:31:37,360 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:31:37,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:31:37,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:31:37,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:31:37,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:31:37,361 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:31:37,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:31:37,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:31:37,362 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:31:37,389 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:31:37,402 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:31:37,408 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:31:37,410 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:31:37,410 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:31:37,411 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label40.c [2019-09-09 23:31:37,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6f3ff58/f86803d48b5f43c8a7e21a0318ce5efb/FLAG047019dd6 [2019-09-09 23:31:38,436 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:31:38,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label40.c [2019-09-09 23:31:38,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6f3ff58/f86803d48b5f43c8a7e21a0318ce5efb/FLAG047019dd6 [2019-09-09 23:31:38,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d6f3ff58/f86803d48b5f43c8a7e21a0318ce5efb [2019-09-09 23:31:38,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:31:38,815 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:31:38,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:31:38,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:31:38,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:31:38,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:31:38" (1/1) ... [2019-09-09 23:31:38,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0885a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:38, skipping insertion in model container [2019-09-09 23:31:38,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:31:38" (1/1) ... [2019-09-09 23:31:38,836 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:31:39,061 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:31:41,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:31:41,595 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:31:42,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:31:42,908 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:31:42,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42 WrapperNode [2019-09-09 23:31:42,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:31:42,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:31:42,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:31:42,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:31:42,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42" (1/1) ... [2019-09-09 23:31:42,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42" (1/1) ... [2019-09-09 23:31:43,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42" (1/1) ... [2019-09-09 23:31:43,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42" (1/1) ... [2019-09-09 23:31:43,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42" (1/1) ... [2019-09-09 23:31:43,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42" (1/1) ... [2019-09-09 23:31:43,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42" (1/1) ... [2019-09-09 23:31:43,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:31:43,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:31:43,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:31:43,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:31:43,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42" (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 23:31:43,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:31:43,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:31:43,423 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:31:43,423 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:31:43,424 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:31:43,424 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:31:43,424 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:31:43,424 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:31:43,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:31:43,425 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:31:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:31:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:31:43,426 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:31:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:31:43,427 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:31:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:31:43,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:31:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:31:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:31:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:31:43,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:31:54,087 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:31:54,093 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:31:54,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:31:54 BoogieIcfgContainer [2019-09-09 23:31:54,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:31:54,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:31:54,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:31:54,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:31:54,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:31:38" (1/3) ... [2019-09-09 23:31:54,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bfaf20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:31:54, skipping insertion in model container [2019-09-09 23:31:54,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:31:42" (2/3) ... [2019-09-09 23:31:54,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bfaf20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:31:54, skipping insertion in model container [2019-09-09 23:31:54,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:31:54" (3/3) ... [2019-09-09 23:31:54,116 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label40.c [2019-09-09 23:31:54,135 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:31:54,150 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:31:54,176 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:31:54,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:31:54,210 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:31:54,210 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:31:54,210 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:31:54,210 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:31:54,211 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:31:54,211 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:31:54,211 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:31:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:31:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-09 23:31:54,285 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:31:54,286 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:31:54,288 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:31:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:31:54,294 INFO L82 PathProgramCache]: Analyzing trace with hash -16851462, now seen corresponding path program 1 times [2019-09-09 23:31:54,297 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:31:54,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:31:54,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:31:54,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:31:54,353 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:31:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:31:54,709 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 23:31:54,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:31:54,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:31:54,712 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:31:54,717 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:31:54,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:31:54,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:31:54,738 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-09 23:32:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:32:06,984 INFO L93 Difference]: Finished difference Result 3224 states and 5806 transitions. [2019-09-09 23:32:06,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:32:06,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-09-09 23:32:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:32:07,032 INFO L225 Difference]: With dead ends: 3224 [2019-09-09 23:32:07,033 INFO L226 Difference]: Without dead ends: 3156 [2019-09-09 23:32:07,034 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 23:32:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2019-09-09 23:32:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 3153. [2019-09-09 23:32:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2019-09-09 23:32:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5691 transitions. [2019-09-09 23:32:07,239 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5691 transitions. Word has length 52 [2019-09-09 23:32:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:32:07,241 INFO L475 AbstractCegarLoop]: Abstraction has 3153 states and 5691 transitions. [2019-09-09 23:32:07,242 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:32:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5691 transitions. [2019-09-09 23:32:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 23:32:07,254 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:32:07,255 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, 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] [2019-09-09 23:32:07,255 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:32:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:32:07,256 INFO L82 PathProgramCache]: Analyzing trace with hash -297980441, now seen corresponding path program 1 times [2019-09-09 23:32:07,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:32:07,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:07,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:32:07,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:07,258 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:32:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:32:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:32:07,511 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:32:07,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:32:07,511 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:32:07,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:32:07,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:32:07,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:32:07,514 INFO L87 Difference]: Start difference. First operand 3153 states and 5691 transitions. Second operand 6 states. [2019-09-09 23:32:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:32:21,736 INFO L93 Difference]: Finished difference Result 4698 states and 7866 transitions. [2019-09-09 23:32:21,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:32:21,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-09-09 23:32:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:32:21,762 INFO L225 Difference]: With dead ends: 4698 [2019-09-09 23:32:21,763 INFO L226 Difference]: Without dead ends: 4698 [2019-09-09 23:32:21,764 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 23:32:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2019-09-09 23:32:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4645. [2019-09-09 23:32:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4645 states. [2019-09-09 23:32:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4645 states to 4645 states and 7795 transitions. [2019-09-09 23:32:21,887 INFO L78 Accepts]: Start accepts. Automaton has 4645 states and 7795 transitions. Word has length 123 [2019-09-09 23:32:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:32:21,890 INFO L475 AbstractCegarLoop]: Abstraction has 4645 states and 7795 transitions. [2019-09-09 23:32:21,890 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:32:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4645 states and 7795 transitions. [2019-09-09 23:32:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-09 23:32:21,899 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:32:21,899 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, 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] [2019-09-09 23:32:21,900 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:32:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:32:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1089068732, now seen corresponding path program 1 times [2019-09-09 23:32:21,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:32:21,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:21,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:32:21,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:21,903 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:32:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:32:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:32:22,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:32:22,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:32:22,066 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:32:22,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:32:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:32:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:32:22,067 INFO L87 Difference]: Start difference. First operand 4645 states and 7795 transitions. Second operand 6 states. [2019-09-09 23:32:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:32:38,755 INFO L93 Difference]: Finished difference Result 9315 states and 15688 transitions. [2019-09-09 23:32:38,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:32:38,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-09-09 23:32:38,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:32:38,804 INFO L225 Difference]: With dead ends: 9315 [2019-09-09 23:32:38,804 INFO L226 Difference]: Without dead ends: 9315 [2019-09-09 23:32:38,804 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 23:32:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9315 states. [2019-09-09 23:32:39,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9315 to 9121. [2019-09-09 23:32:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9121 states. [2019-09-09 23:32:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9121 states to 9121 states and 15295 transitions. [2019-09-09 23:32:39,040 INFO L78 Accepts]: Start accepts. Automaton has 9121 states and 15295 transitions. Word has length 125 [2019-09-09 23:32:39,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:32:39,041 INFO L475 AbstractCegarLoop]: Abstraction has 9121 states and 15295 transitions. [2019-09-09 23:32:39,041 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:32:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand 9121 states and 15295 transitions. [2019-09-09 23:32:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-09 23:32:39,044 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:32:39,044 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, 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] [2019-09-09 23:32:39,045 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:32:39,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:32:39,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1921984805, now seen corresponding path program 1 times [2019-09-09 23:32:39,046 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:32:39,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:39,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:32:39,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:32:39,048 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:32:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:32:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:32:39,215 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:32:39,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:32:39,215 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:32:39,216 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:32:39,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:32:39,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:32:39,217 INFO L87 Difference]: Start difference. First operand 9121 states and 15295 transitions. Second operand 6 states. [2019-09-09 23:33:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:33:07,005 INFO L93 Difference]: Finished difference Result 26844 states and 42590 transitions. [2019-09-09 23:33:07,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:33:07,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2019-09-09 23:33:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:33:07,123 INFO L225 Difference]: With dead ends: 26844 [2019-09-09 23:33:07,124 INFO L226 Difference]: Without dead ends: 26844 [2019-09-09 23:33:07,124 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 23:33:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26844 states. [2019-09-09 23:33:07,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26844 to 26785. [2019-09-09 23:33:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26785 states. [2019-09-09 23:33:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26785 states to 26785 states and 42356 transitions. [2019-09-09 23:33:07,776 INFO L78 Accepts]: Start accepts. Automaton has 26785 states and 42356 transitions. Word has length 147 [2019-09-09 23:33:07,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:33:07,779 INFO L475 AbstractCegarLoop]: Abstraction has 26785 states and 42356 transitions. [2019-09-09 23:33:07,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:33:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 26785 states and 42356 transitions. [2019-09-09 23:33:07,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-09 23:33:07,783 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:33:07,785 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, 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] [2019-09-09 23:33:07,785 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:33:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:33:07,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1260297143, now seen corresponding path program 1 times [2019-09-09 23:33:07,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:33:07,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:33:07,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:33:07,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:33:07,787 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:33:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:33:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:33:07,951 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:33:07,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:33:07,951 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:33:07,952 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:33:07,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:33:07,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:33:07,953 INFO L87 Difference]: Start difference. First operand 26785 states and 42356 transitions. Second operand 5 states. [2019-09-09 23:33:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:33:24,538 INFO L93 Difference]: Finished difference Result 54501 states and 83409 transitions. [2019-09-09 23:33:24,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 23:33:24,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-09-09 23:33:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:33:24,768 INFO L225 Difference]: With dead ends: 54501 [2019-09-09 23:33:24,768 INFO L226 Difference]: Without dead ends: 54501 [2019-09-09 23:33:24,769 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 23:33:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54501 states. [2019-09-09 23:33:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54501 to 53944. [2019-09-09 23:33:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53944 states. [2019-09-09 23:33:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53944 states to 53944 states and 80603 transitions. [2019-09-09 23:33:27,992 INFO L78 Accepts]: Start accepts. Automaton has 53944 states and 80603 transitions. Word has length 156 [2019-09-09 23:33:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:33:27,993 INFO L475 AbstractCegarLoop]: Abstraction has 53944 states and 80603 transitions. [2019-09-09 23:33:27,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:33:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 53944 states and 80603 transitions. [2019-09-09 23:33:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-09 23:33:27,997 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:33:27,997 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:33:27,998 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:33:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:33:27,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1542002792, now seen corresponding path program 1 times [2019-09-09 23:33:27,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:33:28,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:33:28,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:33:28,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:33:28,002 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:33:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:33:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:33:28,218 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:33:28,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:33:28,218 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:33:28,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:33:28,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:33:28,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:33:28,219 INFO L87 Difference]: Start difference. First operand 53944 states and 80603 transitions. Second operand 6 states. [2019-09-09 23:33:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:33:44,941 INFO L93 Difference]: Finished difference Result 70876 states and 107162 transitions. [2019-09-09 23:33:44,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:33:44,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 184 [2019-09-09 23:33:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:33:45,216 INFO L225 Difference]: With dead ends: 70876 [2019-09-09 23:33:45,216 INFO L226 Difference]: Without dead ends: 70876 [2019-09-09 23:33:45,217 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 23:33:45,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70876 states. [2019-09-09 23:33:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70876 to 70649. [2019-09-09 23:33:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70649 states. [2019-09-09 23:33:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70649 states to 70649 states and 104478 transitions. [2019-09-09 23:33:46,925 INFO L78 Accepts]: Start accepts. Automaton has 70649 states and 104478 transitions. Word has length 184 [2019-09-09 23:33:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:33:46,926 INFO L475 AbstractCegarLoop]: Abstraction has 70649 states and 104478 transitions. [2019-09-09 23:33:46,926 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:33:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 70649 states and 104478 transitions. [2019-09-09 23:33:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-09-09 23:33:46,931 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:33:46,932 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:33:46,932 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:33:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:33:46,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1669475458, now seen corresponding path program 1 times [2019-09-09 23:33:46,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:33:46,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:33:46,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:33:46,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:33:46,935 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:33:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:33:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 90 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 23:33:47,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:33:47,098 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:33:47,099 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 222 with the following transitions: [2019-09-09 23:33:47,103 INFO L207 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5550], [5552], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5722], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5877], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:33:47,183 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:33:47,183 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:33:57,427 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:33:57,429 INFO L272 AbstractInterpreter]: Visited 103 different actions 103 times. Never merged. Never widened. Performed 250 root evaluator evaluations with a maximum evaluation depth of 14. Performed 250 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:33:57,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:33:57,434 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:34:04,753 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 75.84% of their original sizes. [2019-09-09 23:34:04,754 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:34:04,826 INFO L420 sIntCurrentIteration]: We unified 220 AI predicates to 220 [2019-09-09 23:34:04,826 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:34:04,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:34:04,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 23:34:04,831 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:34:04,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 23:34:04,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 23:34:04,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:34:04,832 INFO L87 Difference]: Start difference. First operand 70649 states and 104478 transitions. Second operand 10 states. [2019-09-09 23:37:06,112 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.