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/Problem11_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:22:00,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:22:00,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:22:00,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 15:22:00,878 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 15:22:00,893 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:22:00,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:22:00,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:22:00,894 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:22:00,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:22:00,895 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:22:00,895 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:22:00,896 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:22:00,896 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:22:00,896 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:22:00,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:22:00,897 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:22:00,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:22:00,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:22:00,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:22:00,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:22:00,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:22:00,898 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:22:00,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:22:00,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:22:00,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:22:00,899 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:22:00,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:22:00,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:22:00,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:22:00,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:22:00,900 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:22:00,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:22:00,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:22:00,900 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:22:00,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:22:00,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:22:00,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:22:00,948 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:22:00,949 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:22:00,949 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-09-09 15:22:01,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d5f0c626/e69e6d94aad540629658c9bdaf65fd99/FLAG2dbd81bcb [2019-09-09 15:22:01,638 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:22:01,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28.c [2019-09-09 15:22:01,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d5f0c626/e69e6d94aad540629658c9bdaf65fd99/FLAG2dbd81bcb [2019-09-09 15:22:01,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d5f0c626/e69e6d94aad540629658c9bdaf65fd99 [2019-09-09 15:22:01,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:22:01,845 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:22:01,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:22:01,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:22:01,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:22:01,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:22:01" (1/1) ... [2019-09-09 15:22:01,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aaddbe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:01, skipping insertion in model container [2019-09-09 15:22:01,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:22:01" (1/1) ... [2019-09-09 15:22:01,862 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:22:01,927 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:22:02,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:22:02,580 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:22:02,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:22:02,949 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:22:02,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02 WrapperNode [2019-09-09 15:22:02,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:22:02,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:22:02,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:22:02,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:22:02,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02" (1/1) ... [2019-09-09 15:22:02,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02" (1/1) ... [2019-09-09 15:22:03,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02" (1/1) ... [2019-09-09 15:22:03,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02" (1/1) ... [2019-09-09 15:22:03,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02" (1/1) ... [2019-09-09 15:22:03,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02" (1/1) ... [2019-09-09 15:22:03,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02" (1/1) ... [2019-09-09 15:22:03,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:22:03,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:22:03,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:22:03,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:22:03,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02" (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 15:22:03,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:22:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:22:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:22:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:22:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:22:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:22:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:22:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:22:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:22:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:22:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:22:05,270 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:22:05,270 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:22:05,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:22:05 BoogieIcfgContainer [2019-09-09 15:22:05,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:22:05,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:22:05,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:22:05,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:22:05,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:22:01" (1/3) ... [2019-09-09 15:22:05,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaf0da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:22:05, skipping insertion in model container [2019-09-09 15:22:05,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:22:02" (2/3) ... [2019-09-09 15:22:05,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaf0da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:22:05, skipping insertion in model container [2019-09-09 15:22:05,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:22:05" (3/3) ... [2019-09-09 15:22:05,288 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label28.c [2019-09-09 15:22:05,299 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:22:05,310 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:22:05,330 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:22:05,367 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:22:05,368 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:22:05,368 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:22:05,369 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:22:05,369 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:22:05,369 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:22:05,369 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:22:05,369 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:22:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-09-09 15:22:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-09 15:22:05,430 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:22:05,432 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] [2019-09-09 15:22:05,435 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:22:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:22:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1610348989, now seen corresponding path program 1 times [2019-09-09 15:22:05,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:22:05,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:05,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:22:05,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:05,500 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:22:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:22:05,846 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 15:22:05,848 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:22:05,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 15:22:05,849 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:22:05,855 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 15:22:05,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 15:22:05,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 15:22:05,873 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-09-09 15:22:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:22:08,155 INFO L93 Difference]: Finished difference Result 692 states and 953 transitions. [2019-09-09 15:22:08,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 15:22:08,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2019-09-09 15:22:08,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:22:08,182 INFO L225 Difference]: With dead ends: 692 [2019-09-09 15:22:08,182 INFO L226 Difference]: Without dead ends: 619 [2019-09-09 15:22:08,184 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 15:22:08,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-09-09 15:22:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2019-09-09 15:22:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-09-09 15:22:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2019-09-09 15:22:08,289 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 54 [2019-09-09 15:22:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:22:08,290 INFO L475 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2019-09-09 15:22:08,290 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 15:22:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2019-09-09 15:22:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-09 15:22:08,304 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:22:08,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:22:08,305 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:22:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:22:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1973618443, now seen corresponding path program 1 times [2019-09-09 15:22:08,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:22:08,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:08,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:22:08,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:08,310 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:22:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:22:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:22:08,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:22:08,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 15:22:08,551 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:22:08,553 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 15:22:08,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 15:22:08,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 15:22:08,554 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand 4 states. [2019-09-09 15:22:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:22:10,496 INFO L93 Difference]: Finished difference Result 1765 states and 2376 transitions. [2019-09-09 15:22:10,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 15:22:10,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2019-09-09 15:22:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:22:10,510 INFO L225 Difference]: With dead ends: 1765 [2019-09-09 15:22:10,510 INFO L226 Difference]: Without dead ends: 1765 [2019-09-09 15:22:10,511 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 15:22:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2019-09-09 15:22:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1750. [2019-09-09 15:22:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1750 states. [2019-09-09 15:22:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2347 transitions. [2019-09-09 15:22:10,576 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2347 transitions. Word has length 127 [2019-09-09 15:22:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:22:10,577 INFO L475 AbstractCegarLoop]: Abstraction has 1750 states and 2347 transitions. [2019-09-09 15:22:10,577 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 15:22:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2347 transitions. [2019-09-09 15:22:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-09 15:22:10,580 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:22:10,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:22:10,581 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:22:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:22:10,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1199392174, now seen corresponding path program 1 times [2019-09-09 15:22:10,582 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:22:10,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:10,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:22:10,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:10,583 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:22:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:22:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:22:10,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:22:10,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 15:22:10,736 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:22:10,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 15:22:10,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 15:22:10,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 15:22:10,739 INFO L87 Difference]: Start difference. First operand 1750 states and 2347 transitions. Second operand 6 states. [2019-09-09 15:22:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:22:12,508 INFO L93 Difference]: Finished difference Result 2944 states and 3786 transitions. [2019-09-09 15:22:12,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 15:22:12,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-09-09 15:22:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:22:12,527 INFO L225 Difference]: With dead ends: 2944 [2019-09-09 15:22:12,528 INFO L226 Difference]: Without dead ends: 2944 [2019-09-09 15:22:12,528 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 15:22:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2019-09-09 15:22:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2929. [2019-09-09 15:22:12,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2929 states. [2019-09-09 15:22:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2929 states to 2929 states and 3748 transitions. [2019-09-09 15:22:12,637 INFO L78 Accepts]: Start accepts. Automaton has 2929 states and 3748 transitions. Word has length 134 [2019-09-09 15:22:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:22:12,638 INFO L475 AbstractCegarLoop]: Abstraction has 2929 states and 3748 transitions. [2019-09-09 15:22:12,638 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 15:22:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2929 states and 3748 transitions. [2019-09-09 15:22:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-09 15:22:12,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:22:12,644 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:22:12,644 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:22:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:22:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash -91916028, now seen corresponding path program 1 times [2019-09-09 15:22:12,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:22:12,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:12,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:22:12,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:22:12,646 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:22:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:22:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:22:12,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:22:12,823 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:22:12,824 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 208 with the following transitions: [2019-09-09 15:22:12,826 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [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], [341], [343], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [538], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-09-09 15:22:12,889 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:22:12,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:23:14,027 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:23:14,030 INFO L272 AbstractInterpreter]: Visited 85 different actions 85 times. Never merged. Never widened. Performed 219 root evaluator evaluations with a maximum evaluation depth of 17. Performed 219 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-09-09 15:23:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:23:14,034 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:24:27,769 INFO L227 lantSequenceWeakener]: Weakened 188 states. On average, predicates are now at 73.94% of their original sizes. [2019-09-09 15:24:27,770 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:24:27,861 INFO L420 sIntCurrentIteration]: We unified 206 AI predicates to 206 [2019-09-09 15:24:27,861 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:24:27,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:24:27,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 15:24:27,863 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:24:27,864 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 15:24:27,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 15:24:27,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 15:24:27,865 INFO L87 Difference]: Start difference. First operand 2929 states and 3748 transitions. Second operand 10 states.