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/Problem12_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:49:21,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:49:21,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:49:21,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 16:49:21,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:49:21,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:49:21,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:49:21,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:49:21,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:49:21,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:49:21,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:49:21,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:49:21,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:49:21,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:49:21,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:49:21,368 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 16:49:21,394 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:49:21,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:49:21,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:49:21,395 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:49:21,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:49:21,396 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:49:21,396 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:49:21,396 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:49:21,396 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:49:21,396 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:49:21,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:49:21,398 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:49:21,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:49:21,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:49:21,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:49:21,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:49:21,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:49:21,399 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:49:21,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:49:21,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:49:21,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:49:21,400 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:49:21,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:49:21,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:49:21,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:49:21,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:49:21,401 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:49:21,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:49:21,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:49:21,402 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:49:21,446 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:49:21,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:49:21,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:49:21,467 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:49:21,467 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:49:21,468 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label54.c [2019-09-09 16:49:21,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e390a0772/663538007bd54d7d95fa1e722141a765/FLAG57aeb46e1 [2019-09-09 16:49:22,353 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:49:22,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label54.c [2019-09-09 16:49:22,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e390a0772/663538007bd54d7d95fa1e722141a765/FLAG57aeb46e1 [2019-09-09 16:49:22,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e390a0772/663538007bd54d7d95fa1e722141a765 [2019-09-09 16:49:22,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:49:22,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:49:22,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:49:22,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:49:22,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:49:22,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:49:22" (1/1) ... [2019-09-09 16:49:22,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19cbc9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:22, skipping insertion in model container [2019-09-09 16:49:22,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:49:22" (1/1) ... [2019-09-09 16:49:22,877 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:49:23,046 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:49:24,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:49:24,897 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:49:25,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:49:25,571 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:49:25,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25 WrapperNode [2019-09-09 16:49:25,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:49:25,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:49:25,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:49:25,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:49:25,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25" (1/1) ... [2019-09-09 16:49:25,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25" (1/1) ... [2019-09-09 16:49:25,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25" (1/1) ... [2019-09-09 16:49:25,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25" (1/1) ... [2019-09-09 16:49:25,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25" (1/1) ... [2019-09-09 16:49:25,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25" (1/1) ... [2019-09-09 16:49:25,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25" (1/1) ... [2019-09-09 16:49:25,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:49:25,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:49:25,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:49:25,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:49:25,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25" (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 16:49:25,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:49:25,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:49:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:49:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:49:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:49:25,944 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:49:25,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:49:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:49:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:49:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:49:25,945 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:49:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:49:25,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:49:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:49:25,947 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:49:25,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:49:25,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:49:30,703 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:49:30,704 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:49:30,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:49:30 BoogieIcfgContainer [2019-09-09 16:49:30,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:49:30,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:49:30,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:49:30,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:49:30,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:49:22" (1/3) ... [2019-09-09 16:49:30,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f4515e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:49:30, skipping insertion in model container [2019-09-09 16:49:30,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:25" (2/3) ... [2019-09-09 16:49:30,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f4515e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:49:30, skipping insertion in model container [2019-09-09 16:49:30,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:49:30" (3/3) ... [2019-09-09 16:49:30,719 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label54.c [2019-09-09 16:49:30,730 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:49:30,742 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:49:30,760 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:49:30,793 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:49:30,793 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:49:30,793 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:49:30,793 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:49:30,794 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:49:30,794 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:49:30,794 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:49:30,794 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:49:30,842 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 16:49:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-09 16:49:30,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:49:30,858 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] [2019-09-09 16:49:30,860 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:49:30,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:49:30,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1843653234, now seen corresponding path program 1 times [2019-09-09 16:49:30,869 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:49:30,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:30,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:49:30,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:30,926 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:49:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:49:31,322 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 16:49:31,324 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:49:31,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 16:49:31,325 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:49:31,330 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 16:49:31,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 16:49:31,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 16:49:31,348 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-09-09 16:49:36,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:49:36,582 INFO L93 Difference]: Finished difference Result 1610 states and 2855 transitions. [2019-09-09 16:49:36,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 16:49:36,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-09-09 16:49:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:49:36,637 INFO L225 Difference]: With dead ends: 1610 [2019-09-09 16:49:36,638 INFO L226 Difference]: Without dead ends: 1542 [2019-09-09 16:49:36,641 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 16:49:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-09-09 16:49:36,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-09-09 16:49:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-09-09 16:49:36,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2750 transitions. [2019-09-09 16:49:36,802 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2750 transitions. Word has length 39 [2019-09-09 16:49:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:49:36,803 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2750 transitions. [2019-09-09 16:49:36,803 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 16:49:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2750 transitions. [2019-09-09 16:49:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-09 16:49:36,810 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:49:36,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:36,812 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:49:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:49:36,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1185060153, now seen corresponding path program 1 times [2019-09-09 16:49:36,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:49:36,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:36,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:49:36,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:36,815 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:49:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:49:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:49:37,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:49:37,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 16:49:37,087 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:49:37,089 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 16:49:37,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 16:49:37,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 16:49:37,091 INFO L87 Difference]: Start difference. First operand 1542 states and 2750 transitions. Second operand 5 states. [2019-09-09 16:49:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:49:44,063 INFO L93 Difference]: Finished difference Result 3154 states and 5401 transitions. [2019-09-09 16:49:44,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:49:44,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2019-09-09 16:49:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:49:44,086 INFO L225 Difference]: With dead ends: 3154 [2019-09-09 16:49:44,086 INFO L226 Difference]: Without dead ends: 3154 [2019-09-09 16:49:44,087 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 16:49:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2019-09-09 16:49:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 3122. [2019-09-09 16:49:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3122 states. [2019-09-09 16:49:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 5336 transitions. [2019-09-09 16:49:44,171 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 5336 transitions. Word has length 112 [2019-09-09 16:49:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:49:44,172 INFO L475 AbstractCegarLoop]: Abstraction has 3122 states and 5336 transitions. [2019-09-09 16:49:44,172 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 16:49:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 5336 transitions. [2019-09-09 16:49:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-09 16:49:44,174 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:49:44,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:44,175 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:49:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:49:44,175 INFO L82 PathProgramCache]: Analyzing trace with hash -304531670, now seen corresponding path program 1 times [2019-09-09 16:49:44,175 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:49:44,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:44,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:49:44,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:44,177 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:49:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:49:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:49:44,309 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:49:44,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:49:44,309 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:49:44,310 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:49:44,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:49:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:49:44,311 INFO L87 Difference]: Start difference. First operand 3122 states and 5336 transitions. Second operand 6 states. [2019-09-09 16:49:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:49:51,691 INFO L93 Difference]: Finished difference Result 6375 states and 10897 transitions. [2019-09-09 16:49:51,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:49:51,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-09-09 16:49:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:49:51,738 INFO L225 Difference]: With dead ends: 6375 [2019-09-09 16:49:51,738 INFO L226 Difference]: Without dead ends: 6375 [2019-09-09 16:49:51,747 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 16:49:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2019-09-09 16:49:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6333. [2019-09-09 16:49:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6333 states. [2019-09-09 16:49:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6333 states to 6333 states and 10771 transitions. [2019-09-09 16:49:51,993 INFO L78 Accepts]: Start accepts. Automaton has 6333 states and 10771 transitions. Word has length 117 [2019-09-09 16:49:51,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:49:51,995 INFO L475 AbstractCegarLoop]: Abstraction has 6333 states and 10771 transitions. [2019-09-09 16:49:51,995 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:49:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 6333 states and 10771 transitions. [2019-09-09 16:49:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-09 16:49:52,008 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:49:52,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:52,008 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:49:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:49:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash 336331706, now seen corresponding path program 1 times [2019-09-09 16:49:52,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:49:52,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:52,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:49:52,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:52,010 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:49:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:49:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:49:52,249 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:49:52,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:49:52,250 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:49:52,250 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:49:52,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:49:52,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:49:52,251 INFO L87 Difference]: Start difference. First operand 6333 states and 10771 transitions. Second operand 6 states. [2019-09-09 16:49:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:49:58,451 INFO L93 Difference]: Finished difference Result 9653 states and 15967 transitions. [2019-09-09 16:49:58,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:49:58,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-09-09 16:49:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:49:58,495 INFO L225 Difference]: With dead ends: 9653 [2019-09-09 16:49:58,495 INFO L226 Difference]: Without dead ends: 9653 [2019-09-09 16:49:58,495 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 16:49:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9653 states. [2019-09-09 16:49:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9653 to 9576. [2019-09-09 16:49:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9576 states. [2019-09-09 16:49:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 15608 transitions. [2019-09-09 16:49:58,729 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 15608 transitions. Word has length 125 [2019-09-09 16:49:58,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:49:58,729 INFO L475 AbstractCegarLoop]: Abstraction has 9576 states and 15608 transitions. [2019-09-09 16:49:58,729 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:49:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 15608 transitions. [2019-09-09 16:49:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-09 16:49:58,734 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:49:58,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:58,735 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:49:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:49:58,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1782179747, now seen corresponding path program 1 times [2019-09-09 16:49:58,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:49:58,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:58,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:49:58,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:58,737 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:49:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:49:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:49:58,891 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:49:58,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:49:58,891 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:49:58,893 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:49:58,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:49:58,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:49:58,894 INFO L87 Difference]: Start difference. First operand 9576 states and 15608 transitions. Second operand 6 states. [2019-09-09 16:50:11,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:50:11,723 INFO L93 Difference]: Finished difference Result 28272 states and 47844 transitions. [2019-09-09 16:50:11,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 16:50:11,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-09-09 16:50:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:50:11,945 INFO L225 Difference]: With dead ends: 28272 [2019-09-09 16:50:11,945 INFO L226 Difference]: Without dead ends: 28272 [2019-09-09 16:50:11,946 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 16:50:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28272 states. [2019-09-09 16:50:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28272 to 28091. [2019-09-09 16:50:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28091 states. [2019-09-09 16:50:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28091 states to 28091 states and 45131 transitions. [2019-09-09 16:50:13,809 INFO L78 Accepts]: Start accepts. Automaton has 28091 states and 45131 transitions. Word has length 142 [2019-09-09 16:50:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:50:13,809 INFO L475 AbstractCegarLoop]: Abstraction has 28091 states and 45131 transitions. [2019-09-09 16:50:13,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:50:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 28091 states and 45131 transitions. [2019-09-09 16:50:13,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-09 16:50:13,812 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:50:13,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:13,812 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:50:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:50:13,814 INFO L82 PathProgramCache]: Analyzing trace with hash -137510042, now seen corresponding path program 1 times [2019-09-09 16:50:13,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:50:13,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:50:13,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:50:13,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:50:13,818 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:50:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:50:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:50:14,002 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:50:14,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:50:14,003 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:50:14,003 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:50:14,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:50:14,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:50:14,004 INFO L87 Difference]: Start difference. First operand 28091 states and 45131 transitions. Second operand 6 states. [2019-09-09 16:50:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:50:21,538 INFO L93 Difference]: Finished difference Result 41230 states and 63505 transitions. [2019-09-09 16:50:21,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:50:21,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2019-09-09 16:50:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:50:21,728 INFO L225 Difference]: With dead ends: 41230 [2019-09-09 16:50:21,728 INFO L226 Difference]: Without dead ends: 41230 [2019-09-09 16:50:21,729 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 16:50:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41230 states. [2019-09-09 16:50:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41230 to 41135. [2019-09-09 16:50:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41135 states. [2019-09-09 16:50:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41135 states to 41135 states and 62353 transitions. [2019-09-09 16:50:22,816 INFO L78 Accepts]: Start accepts. Automaton has 41135 states and 62353 transitions. Word has length 163 [2019-09-09 16:50:22,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:50:22,816 INFO L475 AbstractCegarLoop]: Abstraction has 41135 states and 62353 transitions. [2019-09-09 16:50:22,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:50:22,817 INFO L276 IsEmpty]: Start isEmpty. Operand 41135 states and 62353 transitions. [2019-09-09 16:50:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-09-09 16:50:22,821 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:50:22,821 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 16:50:22,825 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:50:22,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:50:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1611524629, now seen corresponding path program 1 times [2019-09-09 16:50:22,828 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:50:22,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:50:22,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:50:22,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:50:22,830 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:50:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:50:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 64 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 16:50:22,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:50:22,962 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:50:22,964 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 197 with the following transitions: [2019-09-09 16:50:22,966 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2087], [2089], [2092], [2100], [2108], [2116], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2396], [2397], [2400], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 16:50:23,045 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:50:23,046 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 16:50:32,790 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 16:50:32,792 INFO L272 AbstractInterpreter]: Visited 84 different actions 84 times. Never merged. Never widened. Performed 212 root evaluator evaluations with a maximum evaluation depth of 16. Performed 212 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 16:50:32,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:50:32,796 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 16:50:44,449 INFO L227 lantSequenceWeakener]: Weakened 177 states. On average, predicates are now at 75.64% of their original sizes. [2019-09-09 16:50:44,449 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 16:50:44,540 INFO L420 sIntCurrentIteration]: We unified 195 AI predicates to 195 [2019-09-09 16:50:44,540 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 16:50:44,541 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 16:50:44,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2019-09-09 16:50:44,542 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:50:44,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 16:50:44,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 16:50:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 16:50:44,543 INFO L87 Difference]: Start difference. First operand 41135 states and 62353 transitions. Second operand 11 states. [2019-09-09 16:53:51,644 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.