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/Problem17_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:39:37,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:39:37,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:39:37,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:39:37,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 21:39:37,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 21:39:37,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 21:39:37,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 21:39:37,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 21:39:37,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 21:39:37,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 21:39:37,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 21:39:37,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 21:39:37,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 21:39:37,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 21:39:37,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 21:39:37,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 21:39:37,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:39:37,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:39:37,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:39:37,929 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 21:39:37,949 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:39:37,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:39:37,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:39:37,950 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:39:37,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:39:37,951 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:39:37,951 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:39:37,952 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:39:37,952 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:39:37,952 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:39:37,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:39:37,954 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:39:37,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:39:37,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:39:37,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:39:37,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:39:37,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:39:37,956 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:39:37,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:39:37,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:39:37,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:39:37,957 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:39:37,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:39:37,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:39:37,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:39:37,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:39:37,958 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:39:37,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:39:37,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:39:37,958 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:39:38,001 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:39:38,017 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:39:38,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:39:38,023 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:39:38,023 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:39:38,024 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label51.c [2019-09-09 21:39:38,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b7a2594/4ff36c0e5d58497e8e2bced7b096fe09/FLAG4c1a4762c [2019-09-09 21:39:38,881 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:39:38,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label51.c [2019-09-09 21:39:38,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b7a2594/4ff36c0e5d58497e8e2bced7b096fe09/FLAG4c1a4762c [2019-09-09 21:39:38,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3b7a2594/4ff36c0e5d58497e8e2bced7b096fe09 [2019-09-09 21:39:38,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:39:38,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:39:38,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:39:38,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:39:39,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:39:39,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:39:38" (1/1) ... [2019-09-09 21:39:39,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@671ed55f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:39, skipping insertion in model container [2019-09-09 21:39:39,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:39:38" (1/1) ... [2019-09-09 21:39:39,016 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:39:39,137 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:39:40,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:39:40,343 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:39:40,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:39:40,849 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:39:40,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40 WrapperNode [2019-09-09 21:39:40,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:39:40,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:39:40,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:39:40,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:39:40,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40" (1/1) ... [2019-09-09 21:39:40,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40" (1/1) ... [2019-09-09 21:39:40,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40" (1/1) ... [2019-09-09 21:39:40,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40" (1/1) ... [2019-09-09 21:39:41,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40" (1/1) ... [2019-09-09 21:39:41,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40" (1/1) ... [2019-09-09 21:39:41,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40" (1/1) ... [2019-09-09 21:39:41,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:39:41,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:39:41,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:39:41,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:39:41,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40" (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 21:39:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:39:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:39:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:39:41,197 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:39:41,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:39:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:39:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:39:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:39:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:39:41,198 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:39:41,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:39:41,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:39:41,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:39:44,941 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:39:44,942 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:39:44,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:39:44 BoogieIcfgContainer [2019-09-09 21:39:44,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:39:44,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:39:44,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:39:44,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:39:44,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:39:38" (1/3) ... [2019-09-09 21:39:44,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425c25f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:39:44, skipping insertion in model container [2019-09-09 21:39:44,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:39:40" (2/3) ... [2019-09-09 21:39:44,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425c25f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:39:44, skipping insertion in model container [2019-09-09 21:39:44,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:39:44" (3/3) ... [2019-09-09 21:39:44,966 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label51.c [2019-09-09 21:39:44,984 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:39:44,998 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:39:45,022 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:39:45,065 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:39:45,066 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:39:45,066 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:39:45,066 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:39:45,066 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:39:45,066 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:39:45,067 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:39:45,067 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:39:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:39:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-09 21:39:45,134 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:39:45,135 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 21:39:45,137 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:39:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:39:45,144 INFO L82 PathProgramCache]: Analyzing trace with hash 480569, now seen corresponding path program 1 times [2019-09-09 21:39:45,146 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:39:45,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:39:45,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:39:45,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:39:45,202 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:39:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:39:45,555 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 21:39:45,557 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:39:45,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:39:45,558 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:39:45,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:39:45,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:39:45,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:39:45,582 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:39:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:39:54,142 INFO L93 Difference]: Finished difference Result 1563 states and 2716 transitions. [2019-09-09 21:39:54,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:39:54,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-09-09 21:39:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:39:54,182 INFO L225 Difference]: With dead ends: 1563 [2019-09-09 21:39:54,182 INFO L226 Difference]: Without dead ends: 1476 [2019-09-09 21:39:54,184 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 21:39:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2019-09-09 21:39:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 990. [2019-09-09 21:39:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2019-09-09 21:39:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1715 transitions. [2019-09-09 21:39:54,299 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1715 transitions. Word has length 43 [2019-09-09 21:39:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:39:54,300 INFO L475 AbstractCegarLoop]: Abstraction has 990 states and 1715 transitions. [2019-09-09 21:39:54,300 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:39:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1715 transitions. [2019-09-09 21:39:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-09 21:39:54,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:39:54,306 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:54,306 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:39:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:39:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash -452916497, now seen corresponding path program 1 times [2019-09-09 21:39:54,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:39:54,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:39:54,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:39:54,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:39:54,309 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:39:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:39:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:39:54,524 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:39:54,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 21:39:54,525 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:39:54,526 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 21:39:54,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 21:39:54,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 21:39:54,527 INFO L87 Difference]: Start difference. First operand 990 states and 1715 transitions. Second operand 5 states. [2019-09-09 21:39:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:39:59,669 INFO L93 Difference]: Finished difference Result 1919 states and 3013 transitions. [2019-09-09 21:39:59,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:39:59,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2019-09-09 21:39:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:39:59,685 INFO L225 Difference]: With dead ends: 1919 [2019-09-09 21:39:59,685 INFO L226 Difference]: Without dead ends: 1919 [2019-09-09 21:39:59,686 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 21:39:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2019-09-09 21:39:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1895. [2019-09-09 21:39:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1895 states. [2019-09-09 21:39:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2965 transitions. [2019-09-09 21:39:59,765 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2965 transitions. Word has length 114 [2019-09-09 21:39:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:39:59,766 INFO L475 AbstractCegarLoop]: Abstraction has 1895 states and 2965 transitions. [2019-09-09 21:39:59,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 21:39:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2965 transitions. [2019-09-09 21:39:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-09 21:39:59,769 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:39:59,770 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:59,770 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:39:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:39:59,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1164800257, now seen corresponding path program 1 times [2019-09-09 21:39:59,771 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:39:59,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:39:59,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:39:59,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:39:59,773 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:39:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:39:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:39:59,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:39:59,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 21:39:59,963 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:39:59,966 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 21:39:59,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 21:39:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 21:39:59,966 INFO L87 Difference]: Start difference. First operand 1895 states and 2965 transitions. Second operand 3 states. [2019-09-09 21:40:05,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:40:05,270 INFO L93 Difference]: Finished difference Result 3668 states and 5198 transitions. [2019-09-09 21:40:05,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 21:40:05,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2019-09-09 21:40:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:40:05,304 INFO L225 Difference]: With dead ends: 3668 [2019-09-09 21:40:05,304 INFO L226 Difference]: Without dead ends: 3668 [2019-09-09 21:40:05,304 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 21:40:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2019-09-09 21:40:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 3665. [2019-09-09 21:40:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3665 states. [2019-09-09 21:40:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 5192 transitions. [2019-09-09 21:40:05,400 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 5192 transitions. Word has length 117 [2019-09-09 21:40:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:40:05,401 INFO L475 AbstractCegarLoop]: Abstraction has 3665 states and 5192 transitions. [2019-09-09 21:40:05,401 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 21:40:05,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 5192 transitions. [2019-09-09 21:40:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-09-09 21:40:05,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:40:05,406 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:05,406 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:40:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:40:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash 396395147, now seen corresponding path program 1 times [2019-09-09 21:40:05,407 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:40:05,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:40:05,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:40:05,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:40:05,408 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:40:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:40:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:40:05,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:40:05,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-09 21:40:05,605 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:40:05,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 21:40:05,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 21:40:05,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 21:40:05,606 INFO L87 Difference]: Start difference. First operand 3665 states and 5192 transitions. Second operand 7 states. [2019-09-09 21:40:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:40:17,032 INFO L93 Difference]: Finished difference Result 8957 states and 13529 transitions. [2019-09-09 21:40:17,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 21:40:17,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2019-09-09 21:40:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:40:17,095 INFO L225 Difference]: With dead ends: 8957 [2019-09-09 21:40:17,095 INFO L226 Difference]: Without dead ends: 8957 [2019-09-09 21:40:17,095 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 21:40:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8957 states. [2019-09-09 21:40:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8957 to 8858. [2019-09-09 21:40:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8858 states. [2019-09-09 21:40:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 12664 transitions. [2019-09-09 21:40:17,388 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 12664 transitions. Word has length 144 [2019-09-09 21:40:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:40:17,390 INFO L475 AbstractCegarLoop]: Abstraction has 8858 states and 12664 transitions. [2019-09-09 21:40:17,390 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 21:40:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 12664 transitions. [2019-09-09 21:40:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-09-09 21:40:17,395 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:40:17,395 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:17,395 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:40:17,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:40:17,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1684892022, now seen corresponding path program 1 times [2019-09-09 21:40:17,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:40:17,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:40:17,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:40:17,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:40:17,397 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:40:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:40:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:40:17,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:40:17,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 21:40:17,555 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:40:17,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 21:40:17,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 21:40:17,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 21:40:17,557 INFO L87 Difference]: Start difference. First operand 8858 states and 12664 transitions. Second operand 5 states. [2019-09-09 21:40:22,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:40:22,927 INFO L93 Difference]: Finished difference Result 15693 states and 22242 transitions. [2019-09-09 21:40:22,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 21:40:22,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2019-09-09 21:40:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:40:23,015 INFO L225 Difference]: With dead ends: 15693 [2019-09-09 21:40:23,015 INFO L226 Difference]: Without dead ends: 15693 [2019-09-09 21:40:23,016 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 21:40:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15693 states. [2019-09-09 21:40:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15693 to 15481. [2019-09-09 21:40:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15481 states. [2019-09-09 21:40:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15481 states to 15481 states and 21454 transitions. [2019-09-09 21:40:23,454 INFO L78 Accepts]: Start accepts. Automaton has 15481 states and 21454 transitions. Word has length 156 [2019-09-09 21:40:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:40:23,454 INFO L475 AbstractCegarLoop]: Abstraction has 15481 states and 21454 transitions. [2019-09-09 21:40:23,454 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 21:40:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 15481 states and 21454 transitions. [2019-09-09 21:40:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-09-09 21:40:23,460 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:40:23,460 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 21:40:23,461 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:40:23,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:40:23,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1020283855, now seen corresponding path program 1 times [2019-09-09 21:40:23,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:40:23,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:40:23,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:40:23,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:40:23,466 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:40:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:40:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 106 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-09 21:40:23,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:40:23,875 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:40:23,876 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 214 with the following transitions: [2019-09-09 21:40:23,880 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [958], [962], [964], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1266], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:40:23,969 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:40:23,970 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:40:30,429 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 21:40:35,391 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:40:35,394 INFO L272 AbstractInterpreter]: Visited 95 different actions 185 times. Merged at 4 different actions 5 times. Never widened. Performed 476 root evaluator evaluations with a maximum evaluation depth of 15. Performed 476 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 21:40:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:40:35,399 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:40:41,225 INFO L227 lantSequenceWeakener]: Weakened 210 states. On average, predicates are now at 75.43% of their original sizes. [2019-09-09 21:40:41,225 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:40:41,346 INFO L420 sIntCurrentIteration]: We unified 212 AI predicates to 212 [2019-09-09 21:40:41,346 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:40:41,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:40:41,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-09-09 21:40:41,347 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:40:41,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 21:40:41,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 21:40:41,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 21:40:41,349 INFO L87 Difference]: Start difference. First operand 15481 states and 21454 transitions. Second operand 11 states.