java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:45:47,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:45:47,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:45:48,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:45:48,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 23:45:48,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 23:45:48,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 23:45:48,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 23:45:48,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 23:45:48,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 23:45:48,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 23:45:48,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 23:45:48,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:45:48,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:45:48,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:45:48,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 23:45:48,060 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:45:48,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:45:48,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:45:48,061 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:45:48,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:45:48,062 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:45:48,062 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:45:48,063 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:45:48,063 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:45:48,063 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:45:48,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:45:48,064 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:45:48,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:45:48,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:45:48,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:45:48,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:45:48,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:45:48,065 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:45:48,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:45:48,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:45:48,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:45:48,066 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:45:48,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:45:48,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:45:48,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:45:48,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:45:48,068 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:45:48,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:45:48,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:45:48,069 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:45:48,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:45:48,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:45:48,130 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:45:48,131 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:45:48,132 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:45:48,133 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2019-09-09 23:45:48,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2c7361d3/5c887bcb424d480f99a0f3e08d202095/FLAG35331c55e [2019-09-09 23:45:49,119 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:45:49,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label55.c [2019-09-09 23:45:49,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2c7361d3/5c887bcb424d480f99a0f3e08d202095/FLAG35331c55e [2019-09-09 23:45:49,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2c7361d3/5c887bcb424d480f99a0f3e08d202095 [2019-09-09 23:45:49,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:45:49,550 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:45:49,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:45:49,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:45:49,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:45:49,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:45:49" (1/1) ... [2019-09-09 23:45:49,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b05ff34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:49, skipping insertion in model container [2019-09-09 23:45:49,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:45:49" (1/1) ... [2019-09-09 23:45:49,597 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:45:49,797 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:45:52,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:45:52,162 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:45:53,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:45:53,272 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:45:53,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53 WrapperNode [2019-09-09 23:45:53,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:45:53,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:45:53,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:45:53,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:45:53,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53" (1/1) ... [2019-09-09 23:45:53,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53" (1/1) ... [2019-09-09 23:45:53,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53" (1/1) ... [2019-09-09 23:45:53,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53" (1/1) ... [2019-09-09 23:45:53,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53" (1/1) ... [2019-09-09 23:45:53,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53" (1/1) ... [2019-09-09 23:45:53,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53" (1/1) ... [2019-09-09 23:45:53,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:45:53,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:45:53,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:45:53,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:45:53,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:45:53,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:45:53,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:45:53,893 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:45:53,893 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:45:53,894 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:45:53,894 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:45:53,894 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:45:53,894 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:45:53,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:45:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:45:53,895 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:45:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:45:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:45:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:45:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:45:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:45:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:45:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:45:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:45:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:45:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:46:04,820 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:46:04,824 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:46:04,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:46:04 BoogieIcfgContainer [2019-09-09 23:46:04,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:46:04,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:46:04,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:46:04,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:46:04,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:45:49" (1/3) ... [2019-09-09 23:46:04,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350c5a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:46:04, skipping insertion in model container [2019-09-09 23:46:04,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:45:53" (2/3) ... [2019-09-09 23:46:04,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350c5a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:46:04, skipping insertion in model container [2019-09-09 23:46:04,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:46:04" (3/3) ... [2019-09-09 23:46:04,842 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label55.c [2019-09-09 23:46:04,855 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:46:04,867 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:46:04,885 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:46:04,920 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:46:04,920 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:46:04,920 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:46:04,921 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:46:04,921 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:46:04,921 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:46:04,921 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:46:04,921 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:46:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:46:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-09 23:46:04,988 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:46:04,989 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] [2019-09-09 23:46:04,991 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:46:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:46:04,997 INFO L82 PathProgramCache]: Analyzing trace with hash -775038598, now seen corresponding path program 1 times [2019-09-09 23:46:05,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:46:05,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:46:05,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:46:05,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:46:05,044 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:46:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:46:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:46:05,223 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:46:05,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 23:46:05,223 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:46:05,228 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 23:46:05,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 23:46:05,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:46:05,246 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 3 states. [2019-09-09 23:46:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:46:16,695 INFO L93 Difference]: Finished difference Result 3224 states and 5806 transitions. [2019-09-09 23:46:16,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 23:46:16,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-09-09 23:46:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:46:16,748 INFO L225 Difference]: With dead ends: 3224 [2019-09-09 23:46:16,748 INFO L226 Difference]: Without dead ends: 3156 [2019-09-09 23:46:16,752 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 23:46:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2019-09-09 23:46:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 3153. [2019-09-09 23:46:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2019-09-09 23:46:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5691 transitions. [2019-09-09 23:46:16,941 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5691 transitions. Word has length 20 [2019-09-09 23:46:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:46:16,941 INFO L475 AbstractCegarLoop]: Abstraction has 3153 states and 5691 transitions. [2019-09-09 23:46:16,941 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 23:46:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5691 transitions. [2019-09-09 23:46:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-09 23:46:16,949 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:46:16,950 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 23:46:16,950 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:46:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:46:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1178147687, now seen corresponding path program 1 times [2019-09-09 23:46:16,951 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:46:16,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:46:16,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:46:16,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:46:16,953 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:46:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:46:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:46:17,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:46:17,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:46:17,240 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:46:17,242 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:46:17,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:46:17,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:46:17,243 INFO L87 Difference]: Start difference. First operand 3153 states and 5691 transitions. Second operand 6 states. [2019-09-09 23:46:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:46:30,840 INFO L93 Difference]: Finished difference Result 4698 states and 7866 transitions. [2019-09-09 23:46:30,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:46:30,843 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2019-09-09 23:46:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:46:30,867 INFO L225 Difference]: With dead ends: 4698 [2019-09-09 23:46:30,867 INFO L226 Difference]: Without dead ends: 4698 [2019-09-09 23:46:30,868 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:46:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2019-09-09 23:46:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4645. [2019-09-09 23:46:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4645 states. [2019-09-09 23:46:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4645 states to 4645 states and 7795 transitions. [2019-09-09 23:46:30,976 INFO L78 Accepts]: Start accepts. Automaton has 4645 states and 7795 transitions. Word has length 91 [2019-09-09 23:46:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:46:30,977 INFO L475 AbstractCegarLoop]: Abstraction has 4645 states and 7795 transitions. [2019-09-09 23:46:30,977 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:46:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4645 states and 7795 transitions. [2019-09-09 23:46:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-09 23:46:30,980 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:46:30,980 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 23:46:30,980 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:46:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:46:30,981 INFO L82 PathProgramCache]: Analyzing trace with hash 737075260, now seen corresponding path program 1 times [2019-09-09 23:46:30,981 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:46:30,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:46:30,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:46:30,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:46:30,982 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:46:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:46:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:46:31,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:46:31,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:46:31,145 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:46:31,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:46:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:46:31,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:46:31,147 INFO L87 Difference]: Start difference. First operand 4645 states and 7795 transitions. Second operand 6 states. [2019-09-09 23:46:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:46:48,014 INFO L93 Difference]: Finished difference Result 9315 states and 15688 transitions. [2019-09-09 23:46:48,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:46:48,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2019-09-09 23:46:48,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:46:48,065 INFO L225 Difference]: With dead ends: 9315 [2019-09-09 23:46:48,065 INFO L226 Difference]: Without dead ends: 9315 [2019-09-09 23:46:48,066 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:46:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9315 states. [2019-09-09 23:46:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9315 to 9121. [2019-09-09 23:46:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9121 states. [2019-09-09 23:46:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9121 states to 9121 states and 15295 transitions. [2019-09-09 23:46:48,349 INFO L78 Accepts]: Start accepts. Automaton has 9121 states and 15295 transitions. Word has length 93 [2019-09-09 23:46:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:46:48,352 INFO L475 AbstractCegarLoop]: Abstraction has 9121 states and 15295 transitions. [2019-09-09 23:46:48,353 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:46:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9121 states and 15295 transitions. [2019-09-09 23:46:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-09 23:46:48,363 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:46:48,363 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 23:46:48,363 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:46:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:46:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash 353604699, now seen corresponding path program 1 times [2019-09-09 23:46:48,364 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:46:48,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:46:48,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:46:48,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:46:48,366 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:46:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:46:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:46:48,592 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:46:48,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:46:48,593 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:46:48,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:46:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:46:48,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:46:48,596 INFO L87 Difference]: Start difference. First operand 9121 states and 15295 transitions. Second operand 6 states. [2019-09-09 23:47:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:47:17,480 INFO L93 Difference]: Finished difference Result 26842 states and 42589 transitions. [2019-09-09 23:47:17,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:47:17,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2019-09-09 23:47:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:47:17,587 INFO L225 Difference]: With dead ends: 26842 [2019-09-09 23:47:17,587 INFO L226 Difference]: Without dead ends: 26842 [2019-09-09 23:47:17,588 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 23:47:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26842 states. [2019-09-09 23:47:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26842 to 26785. [2019-09-09 23:47:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26785 states. [2019-09-09 23:47:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26785 states to 26785 states and 42356 transitions. [2019-09-09 23:47:18,238 INFO L78 Accepts]: Start accepts. Automaton has 26785 states and 42356 transitions. Word has length 115 [2019-09-09 23:47:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:47:18,239 INFO L475 AbstractCegarLoop]: Abstraction has 26785 states and 42356 transitions. [2019-09-09 23:47:18,239 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:47:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 26785 states and 42356 transitions. [2019-09-09 23:47:18,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-09 23:47:18,248 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:47:18,248 INFO L399 BasicCegarLoop]: trace histogram [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 23:47:18,249 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:47:18,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:47:18,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2058777289, now seen corresponding path program 1 times [2019-09-09 23:47:18,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:47:18,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:47:18,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:47:18,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:47:18,251 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:47:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:47:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:47:18,445 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:47:18,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:47:18,446 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:47:18,447 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:47:18,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:47:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:47:18,448 INFO L87 Difference]: Start difference. First operand 26785 states and 42356 transitions. Second operand 5 states. [2019-09-09 23:47:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:47:35,394 INFO L93 Difference]: Finished difference Result 54501 states and 83409 transitions. [2019-09-09 23:47:35,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 23:47:35,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 124 [2019-09-09 23:47:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:47:35,654 INFO L225 Difference]: With dead ends: 54501 [2019-09-09 23:47:35,655 INFO L226 Difference]: Without dead ends: 54501 [2019-09-09 23:47:35,655 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 23:47:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54501 states. [2019-09-09 23:47:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54501 to 53944. [2019-09-09 23:47:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53944 states. [2019-09-09 23:47:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53944 states to 53944 states and 80603 transitions. [2019-09-09 23:47:38,436 INFO L78 Accepts]: Start accepts. Automaton has 53944 states and 80603 transitions. Word has length 124 [2019-09-09 23:47:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:47:38,437 INFO L475 AbstractCegarLoop]: Abstraction has 53944 states and 80603 transitions. [2019-09-09 23:47:38,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:47:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 53944 states and 80603 transitions. [2019-09-09 23:47:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-09-09 23:47:38,439 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:47:38,440 INFO L399 BasicCegarLoop]: trace histogram [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 23:47:38,440 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:47:38,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:47:38,441 INFO L82 PathProgramCache]: Analyzing trace with hash 759864600, now seen corresponding path program 1 times [2019-09-09 23:47:38,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:47:38,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:47:38,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:47:38,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:47:38,443 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:47:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:47:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:47:38,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:47:38,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:47:38,612 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:47:38,613 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:47:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:47:38,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:47:38,614 INFO L87 Difference]: Start difference. First operand 53944 states and 80603 transitions. Second operand 6 states. [2019-09-09 23:47:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:47:54,343 INFO L93 Difference]: Finished difference Result 70876 states and 107162 transitions. [2019-09-09 23:47:54,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:47:54,343 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-09-09 23:47:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:47:54,644 INFO L225 Difference]: With dead ends: 70876 [2019-09-09 23:47:54,645 INFO L226 Difference]: Without dead ends: 70876 [2019-09-09 23:47:54,645 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:47:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70876 states. [2019-09-09 23:47:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70876 to 70649. [2019-09-09 23:47:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70649 states. [2019-09-09 23:47:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70649 states to 70649 states and 104478 transitions. [2019-09-09 23:47:56,225 INFO L78 Accepts]: Start accepts. Automaton has 70649 states and 104478 transitions. Word has length 152 [2019-09-09 23:47:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:47:56,227 INFO L475 AbstractCegarLoop]: Abstraction has 70649 states and 104478 transitions. [2019-09-09 23:47:56,227 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:47:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 70649 states and 104478 transitions. [2019-09-09 23:47:56,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-09 23:47:56,235 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:47:56,235 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:47:56,244 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:47:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:47:56,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1386765054, now seen corresponding path program 1 times [2019-09-09 23:47:56,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:47:56,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:47:56,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:47:56,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:47:56,246 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:47:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:47:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 23:47:58,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:47:58,233 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:47:58,235 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 190 with the following transitions: [2019-09-09 23:47:58,238 INFO L207 CegarAbsIntRunner]: [0], [1], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5294], [5296], [5299], [5307], [5315], [5323], [5331], [5339], [5347], [5355], [5363], [5371], [5379], [5387], [5395], [5403], [5411], [5419], [5427], [5435], [5443], [5451], [5459], [5467], [5475], [5483], [5491], [5499], [5507], [5515], [5523], [5531], [5539], [5547], [5555], [5563], [5571], [5579], [5587], [5595], [5603], [5611], [5619], [5627], [5635], [5643], [5651], [5659], [5667], [5675], [5683], [5691], [5699], [5707], [5715], [5719], [5722], [5726], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5877], [6802], [6806], [6815], [6819], [6821], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:47:58,321 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:47:58,321 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:48:06,380 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:48:06,382 INFO L272 AbstractInterpreter]: Visited 103 different actions 103 times. Never merged. Never widened. Performed 250 root evaluator evaluations with a maximum evaluation depth of 14. Performed 250 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:48:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:48:06,386 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:48:12,606 INFO L227 lantSequenceWeakener]: Weakened 168 states. On average, predicates are now at 75.2% of their original sizes. [2019-09-09 23:48:12,606 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:48:12,694 INFO L420 sIntCurrentIteration]: We unified 188 AI predicates to 188 [2019-09-09 23:48:12,694 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:48:12,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:48:12,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 23:48:12,695 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:48:12,696 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 23:48:12,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 23:48:12,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 23:48:12,697 INFO L87 Difference]: Start difference. First operand 70649 states and 104478 transitions. Second operand 10 states. [2019-09-09 23:51:23,321 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.