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/Problem15_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:55:21,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:55:21,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:55:21,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:55:21,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:55:21,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:55:21,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:55:21,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:55:21,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:55:21,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:55:21,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:55:21,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:55:21,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:55:21,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:55:21,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:55:21,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:55:21,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 18:55:21,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:55:21,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:55:21,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:55:21,797 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 18:55:21,819 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:55:21,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:55:21,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:55:21,820 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:55:21,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:55:21,822 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:55:21,822 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:55:21,823 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:55:21,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:55:21,823 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:55:21,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:55:21,824 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:55:21,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:55:21,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:55:21,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:55:21,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:55:21,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:55:21,825 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:55:21,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:55:21,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:55:21,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:55:21,826 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:55:21,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:55:21,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:55:21,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:55:21,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:55:21,828 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:55:21,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:55:21,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:55:21,829 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:55:21,882 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:55:21,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:55:21,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:55:21,899 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:55:21,899 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:55:21,900 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label11.c [2019-09-09 18:55:21,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e925492/d7cf10a74ab34660a98197aa40ed5f8c/FLAG2eb8760b3 [2019-09-09 18:55:22,660 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:55:22,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label11.c [2019-09-09 18:55:22,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e925492/d7cf10a74ab34660a98197aa40ed5f8c/FLAG2eb8760b3 [2019-09-09 18:55:22,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e925492/d7cf10a74ab34660a98197aa40ed5f8c [2019-09-09 18:55:22,829 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:55:22,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:55:22,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:55:22,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:55:22,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:55:22,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:55:22" (1/1) ... [2019-09-09 18:55:22,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f71350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:22, skipping insertion in model container [2019-09-09 18:55:22,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:55:22" (1/1) ... [2019-09-09 18:55:22,847 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:55:22,945 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:55:23,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:55:23,964 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:55:24,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:55:24,260 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:55:24,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24 WrapperNode [2019-09-09 18:55:24,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:55:24,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:55:24,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:55:24,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:55:24,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24" (1/1) ... [2019-09-09 18:55:24,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24" (1/1) ... [2019-09-09 18:55:24,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24" (1/1) ... [2019-09-09 18:55:24,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24" (1/1) ... [2019-09-09 18:55:24,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24" (1/1) ... [2019-09-09 18:55:24,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24" (1/1) ... [2019-09-09 18:55:24,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24" (1/1) ... [2019-09-09 18:55:24,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:55:24,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:55:24,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:55:24,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:55:24,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24" (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 18:55:24,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:55:24,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:55:24,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:55:24,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 18:55:24,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:55:24,513 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:55:24,514 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 18:55:24,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:55:24,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:55:24,514 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:55:24,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:55:24,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:55:24,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:55:28,277 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:55:28,277 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:55:28,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:55:28 BoogieIcfgContainer [2019-09-09 18:55:28,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:55:28,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:55:28,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:55:28,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:55:28,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:55:22" (1/3) ... [2019-09-09 18:55:28,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9fa566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:55:28, skipping insertion in model container [2019-09-09 18:55:28,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:24" (2/3) ... [2019-09-09 18:55:28,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9fa566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:55:28, skipping insertion in model container [2019-09-09 18:55:28,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:55:28" (3/3) ... [2019-09-09 18:55:28,289 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label11.c [2019-09-09 18:55:28,301 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:55:28,312 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:55:28,333 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:55:28,367 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:55:28,367 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:55:28,368 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:55:28,368 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:55:28,368 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:55:28,368 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:55:28,369 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:55:28,369 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:55:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 18:55:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-09 18:55:28,440 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:55:28,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:55:28,444 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:55:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:28,451 INFO L82 PathProgramCache]: Analyzing trace with hash -35164099, now seen corresponding path program 1 times [2019-09-09 18:55:28,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:55:28,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:28,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:55:28,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:28,566 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:55:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:55:28,914 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 18:55:28,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:55:28,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:55:28,917 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:55:28,925 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:55:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:55:28,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:55:28,945 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 18:55:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:55:34,129 INFO L93 Difference]: Finished difference Result 1123 states and 1943 transitions. [2019-09-09 18:55:34,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:55:34,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-09-09 18:55:34,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:55:34,171 INFO L225 Difference]: With dead ends: 1123 [2019-09-09 18:55:34,172 INFO L226 Difference]: Without dead ends: 1036 [2019-09-09 18:55:34,174 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 18:55:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-09-09 18:55:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-09-09 18:55:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-09-09 18:55:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-09-09 18:55:34,278 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 61 [2019-09-09 18:55:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:55:34,279 INFO L475 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-09-09 18:55:34,279 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:55:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-09-09 18:55:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-09 18:55:34,286 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:55:34,286 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, 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] [2019-09-09 18:55:34,287 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:55:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:34,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1070771974, now seen corresponding path program 1 times [2019-09-09 18:55:34,287 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:55:34,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:34,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:55:34,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:34,289 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:55:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:55:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:55:34,508 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:55:34,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:55:34,508 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:55:34,510 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:55:34,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:55:34,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:55:34,511 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 4 states. [2019-09-09 18:55:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:55:38,798 INFO L93 Difference]: Finished difference Result 1936 states and 2955 transitions. [2019-09-09 18:55:38,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:55:38,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-09-09 18:55:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:55:38,811 INFO L225 Difference]: With dead ends: 1936 [2019-09-09 18:55:38,811 INFO L226 Difference]: Without dead ends: 1936 [2019-09-09 18:55:38,812 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:55:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2019-09-09 18:55:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1933. [2019-09-09 18:55:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1933 states. [2019-09-09 18:55:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 2950 transitions. [2019-09-09 18:55:38,902 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 2950 transitions. Word has length 130 [2019-09-09 18:55:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:55:38,903 INFO L475 AbstractCegarLoop]: Abstraction has 1933 states and 2950 transitions. [2019-09-09 18:55:38,903 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:55:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 2950 transitions. [2019-09-09 18:55:38,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-09 18:55:38,910 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:55:38,910 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:55:38,910 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:55:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:38,911 INFO L82 PathProgramCache]: Analyzing trace with hash -652978304, now seen corresponding path program 1 times [2019-09-09 18:55:38,911 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:55:38,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:38,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:55:38,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:38,913 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:55:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:55:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:55:39,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:55:39,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 18:55:39,162 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:55:39,165 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 18:55:39,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 18:55:39,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 18:55:39,166 INFO L87 Difference]: Start difference. First operand 1933 states and 2950 transitions. Second operand 5 states. [2019-09-09 18:55:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:55:42,762 INFO L93 Difference]: Finished difference Result 3867 states and 5286 transitions. [2019-09-09 18:55:42,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 18:55:42,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2019-09-09 18:55:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:55:42,789 INFO L225 Difference]: With dead ends: 3867 [2019-09-09 18:55:42,789 INFO L226 Difference]: Without dead ends: 3867 [2019-09-09 18:55:42,793 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 18:55:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2019-09-09 18:55:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3830. [2019-09-09 18:55:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3830 states. [2019-09-09 18:55:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 5188 transitions. [2019-09-09 18:55:42,930 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 5188 transitions. Word has length 177 [2019-09-09 18:55:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:55:42,933 INFO L475 AbstractCegarLoop]: Abstraction has 3830 states and 5188 transitions. [2019-09-09 18:55:42,933 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 18:55:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 5188 transitions. [2019-09-09 18:55:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2019-09-09 18:55:42,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:55:42,948 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:55:42,948 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:55:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2119663085, now seen corresponding path program 1 times [2019-09-09 18:55:42,949 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:55:42,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:42,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:55:42,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:42,951 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:55:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:55:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 321 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-09-09 18:55:43,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:55:43,927 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:55:43,928 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 440 with the following transitions: [2019-09-09 18:55:43,930 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1209], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 18:55:44,024 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:55:44,024 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:55:54,878 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:55:54,881 INFO L272 AbstractInterpreter]: Visited 206 different actions 206 times. Never merged. Never widened. Performed 451 root evaluator evaluations with a maximum evaluation depth of 14. Performed 451 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:55:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:54,886 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:56:04,093 INFO L227 lantSequenceWeakener]: Weakened 415 states. On average, predicates are now at 77.81% of their original sizes. [2019-09-09 18:56:04,093 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:56:04,197 INFO L420 sIntCurrentIteration]: We unified 438 AI predicates to 438 [2019-09-09 18:56:04,197 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:56:04,198 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:56:04,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [10] total 19 [2019-09-09 18:56:04,198 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:56:04,199 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:56:04,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:56:04,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:56:04,200 INFO L87 Difference]: Start difference. First operand 3830 states and 5188 transitions. Second operand 11 states. [2019-09-09 18:56:13,677 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.