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/Problem10_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 18:50:51,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 18:50:51,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 18:50:51,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 18:50:51,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 18:50:51,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 18:50:51,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 18:50:51,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 18:50:51,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 18:50:51,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 18:50:51,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 18:50:51,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 18:50:51,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 18:50:51,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 18:50:51,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 18:50:51,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 18:50:51,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 18:50:51,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 18:50:51,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 18:50:51,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 18:50:51,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 18:50:51,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 18:50:51,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 18:50:51,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 18:50:51,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 18:50:51,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 18:50:51,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 18:50:51,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 18:50:51,464 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 [2019-10-02 18:50:51,479 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 18:50:51,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 18:50:51,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 18:50:51,480 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 18:50:51,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 18:50:51,481 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 18:50:51,482 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 18:50:51,482 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 18:50:51,482 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 18:50:51,482 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 18:50:51,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 18:50:51,483 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 18:50:51,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 18:50:51,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 18:50:51,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 18:50:51,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 18:50:51,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 18:50:51,484 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 18:50:51,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 18:50:51,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 18:50:51,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 18:50:51,485 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 18:50:51,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 18:50:51,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:50:51,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 18:50:51,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 18:50:51,486 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 18:50:51,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 18:50:51,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 18:50:51,487 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 18:50:51,527 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 18:50:51,540 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 18:50:51,543 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 18:50:51,545 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 18:50:51,545 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 18:50:51,546 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-10-02 18:50:51,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f311b6f82/3191615e436e428284881b446fe0b6c7/FLAG94f1190f1 [2019-10-02 18:50:52,210 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 18:50:52,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label25.c [2019-10-02 18:50:52,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f311b6f82/3191615e436e428284881b446fe0b6c7/FLAG94f1190f1 [2019-10-02 18:50:52,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f311b6f82/3191615e436e428284881b446fe0b6c7 [2019-10-02 18:50:52,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 18:50:52,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 18:50:52,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 18:50:52,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 18:50:52,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 18:50:52,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:50:52" (1/1) ... [2019-10-02 18:50:52,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2837cd28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:52, skipping insertion in model container [2019-10-02 18:50:52,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:50:52" (1/1) ... [2019-10-02 18:50:52,508 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 18:50:52,565 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 18:50:53,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:50:53,091 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 18:50:53,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:50:53,242 INFO L192 MainTranslator]: Completed translation [2019-10-02 18:50:53,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53 WrapperNode [2019-10-02 18:50:53,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 18:50:53,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 18:50:53,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 18:50:53,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 18:50:53,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53" (1/1) ... [2019-10-02 18:50:53,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53" (1/1) ... [2019-10-02 18:50:53,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53" (1/1) ... [2019-10-02 18:50:53,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53" (1/1) ... [2019-10-02 18:50:53,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53" (1/1) ... [2019-10-02 18:50:53,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53" (1/1) ... [2019-10-02 18:50:53,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53" (1/1) ... [2019-10-02 18:50:53,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 18:50:53,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 18:50:53,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 18:50:53,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 18:50:53,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53" (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 [2019-10-02 18:50:53,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 18:50:53,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 18:50:53,457 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 18:50:53,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 18:50:53,457 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 18:50:53,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 18:50:53,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 18:50:53,458 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 18:50:53,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 18:50:53,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 18:50:53,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 18:50:54,816 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 18:50:54,816 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 18:50:54,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:50:54 BoogieIcfgContainer [2019-10-02 18:50:54,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 18:50:54,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 18:50:54,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 18:50:54,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 18:50:54,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 06:50:52" (1/3) ... [2019-10-02 18:50:54,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0b33a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:50:54, skipping insertion in model container [2019-10-02 18:50:54,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:50:53" (2/3) ... [2019-10-02 18:50:54,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0b33a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:50:54, skipping insertion in model container [2019-10-02 18:50:54,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:50:54" (3/3) ... [2019-10-02 18:50:54,826 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label25.c [2019-10-02 18:50:54,837 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 18:50:54,847 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 18:50:54,865 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 18:50:54,900 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 18:50:54,900 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 18:50:54,900 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 18:50:54,900 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 18:50:54,901 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 18:50:54,901 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 18:50:54,901 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 18:50:54,901 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 18:50:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 18:50:54,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-02 18:50:54,936 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:54,937 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:50:54,940 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1015003737, now seen corresponding path program 1 times [2019-10-02 18:50:54,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:54,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:54,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:54,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:54,998 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:55,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:55,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 18:50:55,307 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:55,314 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 18:50:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 18:50:55,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:50:55,335 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 18:50:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:56,394 INFO L93 Difference]: Finished difference Result 362 states and 538 transitions. [2019-10-02 18:50:56,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 18:50:56,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2019-10-02 18:50:56,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:56,412 INFO L225 Difference]: With dead ends: 362 [2019-10-02 18:50:56,412 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 18:50:56,414 INFO L640 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 [2019-10-02 18:50:56,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 18:50:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 18:50:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 18:50:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 421 transitions. [2019-10-02 18:50:56,478 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 421 transitions. Word has length 70 [2019-10-02 18:50:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:56,479 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 421 transitions. [2019-10-02 18:50:56,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 18:50:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 421 transitions. [2019-10-02 18:50:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-02 18:50:56,486 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:56,486 INFO L411 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, 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] [2019-10-02 18:50:56,486 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -195666983, now seen corresponding path program 1 times [2019-10-02 18:50:56,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:56,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:56,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:56,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:56,489 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:56,755 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:56,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:50:56,756 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:56,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:50:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:50:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:50:56,759 INFO L87 Difference]: Start difference. First operand 294 states and 421 transitions. Second operand 6 states. [2019-10-02 18:50:57,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:57,711 INFO L93 Difference]: Finished difference Result 453 states and 620 transitions. [2019-10-02 18:50:57,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:50:57,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-10-02 18:50:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:57,719 INFO L225 Difference]: With dead ends: 453 [2019-10-02 18:50:57,719 INFO L226 Difference]: Without dead ends: 453 [2019-10-02 18:50:57,720 INFO L640 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 [2019-10-02 18:50:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-02 18:50:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-02 18:50:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-02 18:50:57,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2019-10-02 18:50:57,754 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 139 [2019-10-02 18:50:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:57,755 INFO L475 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2019-10-02 18:50:57,755 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:50:57,755 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2019-10-02 18:50:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-02 18:50:57,759 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:57,759 INFO L411 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, 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] [2019-10-02 18:50:57,759 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1516573211, now seen corresponding path program 1 times [2019-10-02 18:50:57,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:57,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:57,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:57,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:57,762 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:57,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:57,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 18:50:57,882 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:57,882 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 18:50:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 18:50:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:50:57,883 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand 4 states. [2019-10-02 18:50:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:50:59,028 INFO L93 Difference]: Finished difference Result 1170 states and 1462 transitions. [2019-10-02 18:50:59,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 18:50:59,030 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-10-02 18:50:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:50:59,036 INFO L225 Difference]: With dead ends: 1170 [2019-10-02 18:50:59,036 INFO L226 Difference]: Without dead ends: 735 [2019-10-02 18:50:59,037 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:50:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2019-10-02 18:50:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 592. [2019-10-02 18:50:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-02 18:50:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 801 transitions. [2019-10-02 18:50:59,073 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 801 transitions. Word has length 149 [2019-10-02 18:50:59,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:50:59,074 INFO L475 AbstractCegarLoop]: Abstraction has 592 states and 801 transitions. [2019-10-02 18:50:59,074 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 18:50:59,074 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 801 transitions. [2019-10-02 18:50:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-02 18:50:59,079 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:50:59,079 INFO L411 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, 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] [2019-10-02 18:50:59,079 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:50:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:50:59,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2032612418, now seen corresponding path program 1 times [2019-10-02 18:50:59,080 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:50:59,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:59,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:50:59,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:50:59,082 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:50:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:50:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:50:59,292 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:50:59,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:50:59,292 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:50:59,293 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:50:59,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:50:59,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:50:59,294 INFO L87 Difference]: Start difference. First operand 592 states and 801 transitions. Second operand 6 states. [2019-10-02 18:51:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:51:00,228 INFO L93 Difference]: Finished difference Result 906 states and 1181 transitions. [2019-10-02 18:51:00,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:51:00,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 192 [2019-10-02 18:51:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:51:00,236 INFO L225 Difference]: With dead ends: 906 [2019-10-02 18:51:00,236 INFO L226 Difference]: Without dead ends: 906 [2019-10-02 18:51:00,237 INFO L640 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 [2019-10-02 18:51:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-10-02 18:51:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 890. [2019-10-02 18:51:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-02 18:51:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1141 transitions. [2019-10-02 18:51:00,268 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1141 transitions. Word has length 192 [2019-10-02 18:51:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:51:00,269 INFO L475 AbstractCegarLoop]: Abstraction has 890 states and 1141 transitions. [2019-10-02 18:51:00,269 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:51:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1141 transitions. [2019-10-02 18:51:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-10-02 18:51:00,274 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:51:00,275 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:51:00,275 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:51:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:51:00,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1889340864, now seen corresponding path program 1 times [2019-10-02 18:51:00,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:51:00,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:51:00,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:51:00,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:51:00,278 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:51:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:51:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 204 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:51:00,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:51:00,530 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:51:00,531 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 240 with the following transitions: [2019-10-02 18:51:00,533 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:51:00,583 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:51:00,583 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:51:16,221 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:51:16,224 INFO L272 AbstractInterpreter]: Visited 92 different actions 92 times. Never merged. Never widened. Performed 129 root evaluator evaluations with a maximum evaluation depth of 16. Performed 129 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 18:51:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:51:16,228 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:51:39,756 INFO L227 lantSequenceWeakener]: Weakened 230 states. On average, predicates are now at 73.63% of their original sizes. [2019-10-02 18:51:39,758 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:51:39,788 INFO L420 sIntCurrentIteration]: We unified 238 AI predicates to 238 [2019-10-02 18:51:39,789 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:51:39,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:51:39,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2019-10-02 18:51:39,790 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:51:39,791 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 18:51:39,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 18:51:39,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 18:51:39,792 INFO L87 Difference]: Start difference. First operand 890 states and 1141 transitions. Second operand 7 states. [2019-10-02 18:51:44,252 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:53:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:53:22,529 INFO L93 Difference]: Finished difference Result 1034 states and 1291 transitions. [2019-10-02 18:53:22,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:53:22,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 239 [2019-10-02 18:53:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:53:22,535 INFO L225 Difference]: With dead ends: 1034 [2019-10-02 18:53:22,535 INFO L226 Difference]: Without dead ends: 1034 [2019-10-02 18:53:22,536 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-02 18:53:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2019-10-02 18:53:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1033. [2019-10-02 18:53:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2019-10-02 18:53:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1290 transitions. [2019-10-02 18:53:22,563 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1290 transitions. Word has length 239 [2019-10-02 18:53:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:53:22,564 INFO L475 AbstractCegarLoop]: Abstraction has 1033 states and 1290 transitions. [2019-10-02 18:53:22,564 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 18:53:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1290 transitions. [2019-10-02 18:53:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-10-02 18:53:22,571 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:53:22,571 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 18:53:22,572 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:53:22,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:53:22,572 INFO L82 PathProgramCache]: Analyzing trace with hash -122970787, now seen corresponding path program 1 times [2019-10-02 18:53:22,572 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:53:22,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:53:22,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:53:22,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:53:22,574 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:53:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:53:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 261 proven. 82 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-02 18:53:23,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:53:23,425 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:53:23,425 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 310 with the following transitions: [2019-10-02 18:53:23,426 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:53:23,431 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:53:23,432 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:53:26,135 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:54:06,623 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:54:06,625 INFO L272 AbstractInterpreter]: Visited 96 different actions 186 times. Merged at 4 different actions 4 times. Never widened. Performed 383 root evaluator evaluations with a maximum evaluation depth of 16. Performed 383 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 18:54:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:54:06,626 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:54:55,523 INFO L227 lantSequenceWeakener]: Weakened 306 states. On average, predicates are now at 73.47% of their original sizes. [2019-10-02 18:54:55,523 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:54:55,592 INFO L420 sIntCurrentIteration]: We unified 308 AI predicates to 308 [2019-10-02 18:54:55,593 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:54:55,593 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:54:55,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2019-10-02 18:54:55,593 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:54:55,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 18:54:55,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 18:54:55,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 18:54:55,595 INFO L87 Difference]: Start difference. First operand 1033 states and 1290 transitions. Second operand 10 states. [2019-10-02 18:59:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:59:15,658 INFO L93 Difference]: Finished difference Result 1180 states and 1448 transitions. [2019-10-02 18:59:15,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 18:59:15,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 309 [2019-10-02 18:59:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:59:15,665 INFO L225 Difference]: With dead ends: 1180 [2019-10-02 18:59:15,665 INFO L226 Difference]: Without dead ends: 1180 [2019-10-02 18:59:15,666 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 18:59:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2019-10-02 18:59:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1178. [2019-10-02 18:59:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2019-10-02 18:59:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1446 transitions. [2019-10-02 18:59:15,699 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1446 transitions. Word has length 309 [2019-10-02 18:59:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:59:15,700 INFO L475 AbstractCegarLoop]: Abstraction has 1178 states and 1446 transitions. [2019-10-02 18:59:15,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 18:59:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1446 transitions. [2019-10-02 18:59:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-10-02 18:59:15,710 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:59:15,710 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-02 18:59:15,711 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:59:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:59:15,711 INFO L82 PathProgramCache]: Analyzing trace with hash -703978038, now seen corresponding path program 1 times [2019-10-02 18:59:15,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:59:15,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:15,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:59:15,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:15,716 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:59:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:59:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 146 proven. 292 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-02 18:59:16,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:59:16,491 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:59:16,491 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 355 with the following transitions: [2019-10-02 18:59:16,492 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [546], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:59:16,497 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:59:16,497 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:59:49,831 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:00:51,741 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:00:51,741 INFO L272 AbstractInterpreter]: Visited 124 different actions 242 times. Merged at 4 different actions 4 times. Never widened. Performed 467 root evaluator evaluations with a maximum evaluation depth of 16. Performed 467 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:00:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:00:51,742 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:02:21,606 INFO L227 lantSequenceWeakener]: Weakened 351 states. On average, predicates are now at 73.37% of their original sizes. [2019-10-02 19:02:21,606 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:02:21,708 INFO L420 sIntCurrentIteration]: We unified 353 AI predicates to 353 [2019-10-02 19:02:21,708 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:02:21,708 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:02:21,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [17] total 27 [2019-10-02 19:02:21,709 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:02:21,709 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-02 19:02:21,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-02 19:02:21,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-02 19:02:21,710 INFO L87 Difference]: Start difference. First operand 1178 states and 1446 transitions. Second operand 12 states.