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/Problem13_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:32:52,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:32:52,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:32:52,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 17:32:52,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:32:52,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:32:52,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:32:52,616 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 17:32:52,632 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:32:52,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:32:52,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:32:52,633 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:32:52,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:32:52,634 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:32:52,634 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:32:52,634 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:32:52,634 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:32:52,634 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:32:52,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:32:52,635 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:32:52,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:32:52,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:32:52,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:32:52,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:32:52,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:32:52,637 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:32:52,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:32:52,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:32:52,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:32:52,637 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:32:52,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:32:52,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:32:52,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:32:52,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:32:52,638 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:32:52,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:32:52,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:32:52,639 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:32:52,676 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:32:52,692 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:32:52,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:32:52,697 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:32:52,697 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:32:52,698 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label40.c [2019-09-09 17:32:52,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68c6f059/f6782a75cca14711ba593954f61cf788/FLAG3bf748b25 [2019-09-09 17:32:53,559 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:32:53,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label40.c [2019-09-09 17:32:53,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68c6f059/f6782a75cca14711ba593954f61cf788/FLAG3bf748b25 [2019-09-09 17:32:54,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a68c6f059/f6782a75cca14711ba593954f61cf788 [2019-09-09 17:32:54,119 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:32:54,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:32:54,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:32:54,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:32:54,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:32:54,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:32:54" (1/1) ... [2019-09-09 17:32:54,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fd7f237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:54, skipping insertion in model container [2019-09-09 17:32:54,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:32:54" (1/1) ... [2019-09-09 17:32:54,140 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:32:54,338 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:32:55,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:32:55,943 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:32:56,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:32:56,720 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:32:56,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56 WrapperNode [2019-09-09 17:32:56,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:32:56,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:32:56,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:32:56,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:32:56,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56" (1/1) ... [2019-09-09 17:32:56,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56" (1/1) ... [2019-09-09 17:32:56,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56" (1/1) ... [2019-09-09 17:32:56,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56" (1/1) ... [2019-09-09 17:32:56,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56" (1/1) ... [2019-09-09 17:32:57,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56" (1/1) ... [2019-09-09 17:32:57,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56" (1/1) ... [2019-09-09 17:32:57,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:32:57,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:32:57,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:32:57,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:32:57,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56" (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 17:32:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:32:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:32:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:32:57,233 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:32:57,234 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:32:57,234 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:32:57,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:32:57,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:32:57,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:32:57,234 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:32:57,235 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:32:57,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:32:57,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:32:57,237 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:32:57,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:32:57,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:32:57,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:33:04,455 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:33:04,455 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:33:04,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:33:04 BoogieIcfgContainer [2019-09-09 17:33:04,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:33:04,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:33:04,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:33:04,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:33:04,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:32:54" (1/3) ... [2019-09-09 17:33:04,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f746663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:33:04, skipping insertion in model container [2019-09-09 17:33:04,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:32:56" (2/3) ... [2019-09-09 17:33:04,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f746663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:33:04, skipping insertion in model container [2019-09-09 17:33:04,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:33:04" (3/3) ... [2019-09-09 17:33:04,465 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label40.c [2019-09-09 17:33:04,475 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:33:04,485 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:33:04,501 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:33:04,529 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:33:04,529 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:33:04,530 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:33:04,530 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:33:04,530 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:33:04,530 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:33:04,530 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:33:04,530 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:33:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:33:04,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-09 17:33:04,585 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:33:04,586 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] [2019-09-09 17:33:04,589 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:33:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:04,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1856929193, now seen corresponding path program 1 times [2019-09-09 17:33:04,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:33:04,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:04,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:33:04,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:04,650 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:33:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:33:04,873 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 17:33:04,875 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:33:04,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:33:04,876 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:33:04,882 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:33:04,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:33:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:33:04,902 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 3 states. [2019-09-09 17:33:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:33:11,045 INFO L93 Difference]: Finished difference Result 1981 states and 3232 transitions. [2019-09-09 17:33:11,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:33:11,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-09-09 17:33:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:33:11,101 INFO L225 Difference]: With dead ends: 1981 [2019-09-09 17:33:11,101 INFO L226 Difference]: Without dead ends: 1913 [2019-09-09 17:33:11,103 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 17:33:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2019-09-09 17:33:11,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2019-09-09 17:33:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1912 states. [2019-09-09 17:33:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3141 transitions. [2019-09-09 17:33:11,263 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3141 transitions. Word has length 34 [2019-09-09 17:33:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:33:11,264 INFO L475 AbstractCegarLoop]: Abstraction has 1912 states and 3141 transitions. [2019-09-09 17:33:11,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:33:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3141 transitions. [2019-09-09 17:33:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-09 17:33:11,271 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:33:11,272 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:33:11,272 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:33:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:11,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1973461197, now seen corresponding path program 1 times [2019-09-09 17:33:11,273 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:33:11,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:11,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:33:11,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:11,274 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:33:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:33:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:33:11,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:33:11,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:33:11,546 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:33:11,547 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:33:11,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:33:11,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:33:11,548 INFO L87 Difference]: Start difference. First operand 1912 states and 3141 transitions. Second operand 5 states. [2019-09-09 17:33:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:33:21,883 INFO L93 Difference]: Finished difference Result 3683 states and 5547 transitions. [2019-09-09 17:33:21,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:33:21,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-09-09 17:33:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:33:21,915 INFO L225 Difference]: With dead ends: 3683 [2019-09-09 17:33:21,916 INFO L226 Difference]: Without dead ends: 3683 [2019-09-09 17:33:21,917 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:33:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2019-09-09 17:33:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 3601. [2019-09-09 17:33:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3601 states. [2019-09-09 17:33:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5413 transitions. [2019-09-09 17:33:22,042 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5413 transitions. Word has length 109 [2019-09-09 17:33:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:33:22,043 INFO L475 AbstractCegarLoop]: Abstraction has 3601 states and 5413 transitions. [2019-09-09 17:33:22,043 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:33:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5413 transitions. [2019-09-09 17:33:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 17:33:22,056 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:33:22,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:33:22,057 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:33:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:22,057 INFO L82 PathProgramCache]: Analyzing trace with hash -276532905, now seen corresponding path program 1 times [2019-09-09 17:33:22,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:33:22,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:22,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:33:22,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:22,060 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:33:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:33:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:33:22,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:33:22,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:33:22,295 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:33:22,296 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:33:22,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:33:22,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:33:22,297 INFO L87 Difference]: Start difference. First operand 3601 states and 5413 transitions. Second operand 5 states. [2019-09-09 17:33:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:33:32,557 INFO L93 Difference]: Finished difference Result 7308 states and 10881 transitions. [2019-09-09 17:33:32,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:33:32,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2019-09-09 17:33:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:33:32,600 INFO L225 Difference]: With dead ends: 7308 [2019-09-09 17:33:32,600 INFO L226 Difference]: Without dead ends: 7308 [2019-09-09 17:33:32,610 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:33:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7308 states. [2019-09-09 17:33:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7308 to 7121. [2019-09-09 17:33:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7121 states. [2019-09-09 17:33:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 10497 transitions. [2019-09-09 17:33:32,814 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 10497 transitions. Word has length 123 [2019-09-09 17:33:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:33:32,817 INFO L475 AbstractCegarLoop]: Abstraction has 7121 states and 10497 transitions. [2019-09-09 17:33:32,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:33:32,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 10497 transitions. [2019-09-09 17:33:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 17:33:32,820 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:33:32,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:33:32,820 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:33:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1903087117, now seen corresponding path program 1 times [2019-09-09 17:33:32,821 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:33:32,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:32,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:33:32,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:32,822 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:33:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:33:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:33:33,053 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:33:33,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:33:33,053 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:33:33,055 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:33:33,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:33:33,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:33:33,055 INFO L87 Difference]: Start difference. First operand 7121 states and 10497 transitions. Second operand 6 states. [2019-09-09 17:33:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:33:41,073 INFO L93 Difference]: Finished difference Result 14335 states and 22345 transitions. [2019-09-09 17:33:41,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:33:41,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-09-09 17:33:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:33:41,157 INFO L225 Difference]: With dead ends: 14335 [2019-09-09 17:33:41,157 INFO L226 Difference]: Without dead ends: 14335 [2019-09-09 17:33:41,158 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 17:33:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14335 states. [2019-09-09 17:33:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14335 to 14126. [2019-09-09 17:33:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14126 states. [2019-09-09 17:33:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14126 states to 14126 states and 21305 transitions. [2019-09-09 17:33:41,549 INFO L78 Accepts]: Start accepts. Automaton has 14126 states and 21305 transitions. Word has length 141 [2019-09-09 17:33:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:33:41,551 INFO L475 AbstractCegarLoop]: Abstraction has 14126 states and 21305 transitions. [2019-09-09 17:33:41,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:33:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 14126 states and 21305 transitions. [2019-09-09 17:33:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-09 17:33:41,553 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:33:41,554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:33:41,554 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:33:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2135423331, now seen corresponding path program 1 times [2019-09-09 17:33:41,554 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:33:41,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:41,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:33:41,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:41,556 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:33:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:33:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:33:41,675 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:33:41,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:33:41,676 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:33:41,676 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:33:41,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:33:41,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:33:41,677 INFO L87 Difference]: Start difference. First operand 14126 states and 21305 transitions. Second operand 4 states. [2019-09-09 17:33:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:33:50,688 INFO L93 Difference]: Finished difference Result 25682 states and 36959 transitions. [2019-09-09 17:33:50,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:33:50,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-09-09 17:33:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:33:50,800 INFO L225 Difference]: With dead ends: 25682 [2019-09-09 17:33:50,800 INFO L226 Difference]: Without dead ends: 25682 [2019-09-09 17:33:50,801 INFO L628 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 [2019-09-09 17:33:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2019-09-09 17:33:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 24753. [2019-09-09 17:33:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24753 states. [2019-09-09 17:33:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24753 states to 24753 states and 35812 transitions. [2019-09-09 17:33:51,358 INFO L78 Accepts]: Start accepts. Automaton has 24753 states and 35812 transitions. Word has length 149 [2019-09-09 17:33:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:33:51,359 INFO L475 AbstractCegarLoop]: Abstraction has 24753 states and 35812 transitions. [2019-09-09 17:33:51,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:33:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 24753 states and 35812 transitions. [2019-09-09 17:33:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-09-09 17:33:51,364 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:33:51,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:33:51,365 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:33:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:33:51,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1768094604, now seen corresponding path program 1 times [2019-09-09 17:33:51,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:33:51,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:51,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:33:51,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:33:51,371 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:33:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:33:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:33:51,555 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:33:51,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:33:51,555 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:33:51,556 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:33:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:33:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:33:51,556 INFO L87 Difference]: Start difference. First operand 24753 states and 35812 transitions. Second operand 6 states. [2019-09-09 17:33:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:33:59,259 INFO L93 Difference]: Finished difference Result 44378 states and 64763 transitions. [2019-09-09 17:33:59,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:33:59,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-09-09 17:33:59,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:33:59,475 INFO L225 Difference]: With dead ends: 44378 [2019-09-09 17:33:59,475 INFO L226 Difference]: Without dead ends: 44378 [2019-09-09 17:33:59,476 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 17:33:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44378 states. [2019-09-09 17:34:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44378 to 44219. [2019-09-09 17:34:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44219 states. [2019-09-09 17:34:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44219 states to 44219 states and 63008 transitions. [2019-09-09 17:34:00,416 INFO L78 Accepts]: Start accepts. Automaton has 44219 states and 63008 transitions. Word has length 152 [2019-09-09 17:34:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:34:00,418 INFO L475 AbstractCegarLoop]: Abstraction has 44219 states and 63008 transitions. [2019-09-09 17:34:00,419 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:34:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 44219 states and 63008 transitions. [2019-09-09 17:34:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-09-09 17:34:00,421 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:34:00,422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:34:00,430 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:34:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:34:00,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1419208357, now seen corresponding path program 1 times [2019-09-09 17:34:00,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:34:00,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:34:00,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:34:00,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:34:00,434 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:34:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:34:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:34:00,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:34:00,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:34:00,613 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:34:00,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:34:00,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:34:00,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:34:00,615 INFO L87 Difference]: Start difference. First operand 44219 states and 63008 transitions. Second operand 6 states. [2019-09-09 17:34:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:34:08,335 INFO L93 Difference]: Finished difference Result 52381 states and 71457 transitions. [2019-09-09 17:34:08,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:34:08,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2019-09-09 17:34:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:34:08,534 INFO L225 Difference]: With dead ends: 52381 [2019-09-09 17:34:08,534 INFO L226 Difference]: Without dead ends: 52381 [2019-09-09 17:34:08,535 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 17:34:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52381 states. [2019-09-09 17:34:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52381 to 49876. [2019-09-09 17:34:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49876 states. [2019-09-09 17:34:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49876 states to 49876 states and 67855 transitions. [2019-09-09 17:34:09,498 INFO L78 Accepts]: Start accepts. Automaton has 49876 states and 67855 transitions. Word has length 180 [2019-09-09 17:34:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:34:09,498 INFO L475 AbstractCegarLoop]: Abstraction has 49876 states and 67855 transitions. [2019-09-09 17:34:09,498 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:34:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 49876 states and 67855 transitions. [2019-09-09 17:34:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-09-09 17:34:09,503 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:34:09,504 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:34:09,504 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:34:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:34:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2003306653, now seen corresponding path program 1 times [2019-09-09 17:34:09,505 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:34:09,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:34:09,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:34:09,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:34:09,506 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:34:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:34:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:34:09,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:34:09,701 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:34:09,702 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 230 with the following transitions: [2019-09-09 17:34:09,705 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2807], [2809], [2812], [2820], [2828], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3151], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3355], [3358], [3361], [3365], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:34:09,804 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:34:09,809 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:35:18,177 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:35:18,179 INFO L272 AbstractInterpreter]: Visited 123 different actions 123 times. Never merged. Never widened. Performed 164 root evaluator evaluations with a maximum evaluation depth of 17. Performed 164 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:35:18,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:35:18,183 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:36:16,985 INFO L227 lantSequenceWeakener]: Weakened 218 states. On average, predicates are now at 70.96% of their original sizes. [2019-09-09 17:36:16,986 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:36:17,037 INFO L420 sIntCurrentIteration]: We unified 228 AI predicates to 228 [2019-09-09 17:36:17,037 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:36:17,038 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:36:17,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:36:17,039 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:36:17,039 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:36:17,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:36:17,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:36:17,040 INFO L87 Difference]: Start difference. First operand 49876 states and 67855 transitions. Second operand 8 states. [2019-09-09 17:38:43,328 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.