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/Problem16_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:52:53,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:52:53,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:52:53,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 19:52:53,982 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 19:52:54,017 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:52:54,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:52:54,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:52:54,020 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:52:54,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:52:54,021 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:52:54,021 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:52:54,021 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:52:54,022 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:52:54,022 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:52:54,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:52:54,025 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:52:54,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:52:54,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:52:54,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:52:54,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:52:54,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:52:54,026 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:52:54,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:52:54,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:52:54,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:52:54,028 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:52:54,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:52:54,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:52:54,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:52:54,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:52:54,029 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:52:54,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:52:54,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:52:54,029 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:52:54,075 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:52:54,087 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:52:54,091 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:52:54,092 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:52:54,093 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:52:54,093 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-09-09 19:52:54,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4937c7f55/370f9a07b01b4b8f89f285219d1f84e5/FLAG79ab93fb9 [2019-09-09 19:52:54,737 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:52:54,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-09-09 19:52:54,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4937c7f55/370f9a07b01b4b8f89f285219d1f84e5/FLAG79ab93fb9 [2019-09-09 19:52:54,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4937c7f55/370f9a07b01b4b8f89f285219d1f84e5 [2019-09-09 19:52:54,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:52:54,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:52:54,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:52:54,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:52:54,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:52:55,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:52:54" (1/1) ... [2019-09-09 19:52:55,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f9c9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:55, skipping insertion in model container [2019-09-09 19:52:55,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:52:54" (1/1) ... [2019-09-09 19:52:55,011 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:52:55,102 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:52:56,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:52:56,043 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:52:56,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:52:56,448 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:52:56,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56 WrapperNode [2019-09-09 19:52:56,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:52:56,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:52:56,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:52:56,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:52:56,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56" (1/1) ... [2019-09-09 19:52:56,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56" (1/1) ... [2019-09-09 19:52:56,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56" (1/1) ... [2019-09-09 19:52:56,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56" (1/1) ... [2019-09-09 19:52:56,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56" (1/1) ... [2019-09-09 19:52:56,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56" (1/1) ... [2019-09-09 19:52:56,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56" (1/1) ... [2019-09-09 19:52:56,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:52:56,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:52:56,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:52:56,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:52:56,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:52:56,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:52:56,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:52:56,761 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:52:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:52:56,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:52:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:52:56,762 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:52:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:52:56,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:52:56,764 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:52:56,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:52:56,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:52:56,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:52:59,132 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:52:59,133 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:52:59,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:52:59 BoogieIcfgContainer [2019-09-09 19:52:59,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:52:59,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:52:59,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:52:59,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:52:59,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:52:54" (1/3) ... [2019-09-09 19:52:59,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe18e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:52:59, skipping insertion in model container [2019-09-09 19:52:59,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:52:56" (2/3) ... [2019-09-09 19:52:59,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe18e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:52:59, skipping insertion in model container [2019-09-09 19:52:59,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:52:59" (3/3) ... [2019-09-09 19:52:59,143 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2019-09-09 19:52:59,153 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:52:59,162 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:52:59,179 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:52:59,207 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:52:59,208 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:52:59,208 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:52:59,208 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:52:59,208 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:52:59,208 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:52:59,208 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:52:59,209 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:52:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 19:52:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-09 19:52:59,264 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:52:59,265 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] [2019-09-09 19:52:59,267 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:52:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:52:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash -586545963, now seen corresponding path program 1 times [2019-09-09 19:52:59,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:52:59,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:52:59,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:52:59,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:52:59,328 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:52:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:52:59,659 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 19:52:59,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:52:59,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 19:52:59,662 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:52:59,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 19:52:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 19:52:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 19:52:59,686 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-09-09 19:53:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:53:04,137 INFO L93 Difference]: Finished difference Result 750 states and 1263 transitions. [2019-09-09 19:53:04,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 19:53:04,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2019-09-09 19:53:04,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:53:04,163 INFO L225 Difference]: With dead ends: 750 [2019-09-09 19:53:04,163 INFO L226 Difference]: Without dead ends: 682 [2019-09-09 19:53:04,165 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 19:53:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-09-09 19:53:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-09-09 19:53:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 19:53:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1154 transitions. [2019-09-09 19:53:04,266 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1154 transitions. Word has length 60 [2019-09-09 19:53:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:53:04,266 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1154 transitions. [2019-09-09 19:53:04,266 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 19:53:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1154 transitions. [2019-09-09 19:53:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-09 19:53:04,273 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:53:04,274 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, 1, 1, 1, 1, 1, 1, 1, 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 19:53:04,274 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:53:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:53:04,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1735550147, now seen corresponding path program 1 times [2019-09-09 19:53:04,275 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:53:04,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:53:04,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:53:04,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:53:04,277 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:53:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:53:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:53:04,505 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:53:04,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:53:04,506 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:53:04,507 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:53:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:53:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:53:04,509 INFO L87 Difference]: Start difference. First operand 682 states and 1154 transitions. Second operand 6 states. [2019-09-09 19:53:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:53:10,085 INFO L93 Difference]: Finished difference Result 2130 states and 3534 transitions. [2019-09-09 19:53:10,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 19:53:10,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-09-09 19:53:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:53:10,105 INFO L225 Difference]: With dead ends: 2130 [2019-09-09 19:53:10,105 INFO L226 Difference]: Without dead ends: 2130 [2019-09-09 19:53:10,106 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 19:53:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2019-09-09 19:53:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 2087. [2019-09-09 19:53:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2087 states. [2019-09-09 19:53:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3381 transitions. [2019-09-09 19:53:10,217 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3381 transitions. Word has length 135 [2019-09-09 19:53:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:53:10,218 INFO L475 AbstractCegarLoop]: Abstraction has 2087 states and 3381 transitions. [2019-09-09 19:53:10,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:53:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3381 transitions. [2019-09-09 19:53:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-09 19:53:10,222 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:53:10,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:53:10,224 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:53:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:53:10,226 INFO L82 PathProgramCache]: Analyzing trace with hash -98267403, now seen corresponding path program 1 times [2019-09-09 19:53:10,226 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:53:10,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:53:10,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:53:10,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:53:10,228 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:53:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:53:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:53:10,447 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:53:10,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:53:10,447 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:53:10,448 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:53:10,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:53:10,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:53:10,449 INFO L87 Difference]: Start difference. First operand 2087 states and 3381 transitions. Second operand 6 states. [2019-09-09 19:53:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:53:13,361 INFO L93 Difference]: Finished difference Result 3542 states and 5893 transitions. [2019-09-09 19:53:13,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:53:13,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-09-09 19:53:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:53:13,389 INFO L225 Difference]: With dead ends: 3542 [2019-09-09 19:53:13,390 INFO L226 Difference]: Without dead ends: 3542 [2019-09-09 19:53:13,394 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 19:53:13,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-09-09 19:53:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3503. [2019-09-09 19:53:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2019-09-09 19:53:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5695 transitions. [2019-09-09 19:53:13,524 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5695 transitions. Word has length 139 [2019-09-09 19:53:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:53:13,524 INFO L475 AbstractCegarLoop]: Abstraction has 3503 states and 5695 transitions. [2019-09-09 19:53:13,524 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:53:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5695 transitions. [2019-09-09 19:53:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-09 19:53:13,535 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:53:13,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:53:13,536 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:53:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:53:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1876426643, now seen corresponding path program 1 times [2019-09-09 19:53:13,537 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:53:13,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:53:13,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:53:13,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:53:13,538 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:53:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:53:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:53:13,681 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:53:13,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:53:13,681 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:53:13,682 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:53:13,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:53:13,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:53:13,683 INFO L87 Difference]: Start difference. First operand 3503 states and 5695 transitions. Second operand 6 states. [2019-09-09 19:53:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:53:16,349 INFO L93 Difference]: Finished difference Result 5012 states and 7991 transitions. [2019-09-09 19:53:16,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:53:16,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2019-09-09 19:53:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:53:16,396 INFO L225 Difference]: With dead ends: 5012 [2019-09-09 19:53:16,397 INFO L226 Difference]: Without dead ends: 5012 [2019-09-09 19:53:16,398 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 19:53:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2019-09-09 19:53:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4965. [2019-09-09 19:53:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4965 states. [2019-09-09 19:53:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 7684 transitions. [2019-09-09 19:53:16,672 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 7684 transitions. Word has length 175 [2019-09-09 19:53:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:53:16,674 INFO L475 AbstractCegarLoop]: Abstraction has 4965 states and 7684 transitions. [2019-09-09 19:53:16,674 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:53:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 7684 transitions. [2019-09-09 19:53:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-09 19:53:16,682 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:53:16,682 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:53:16,683 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:53:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:53:16,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1318797007, now seen corresponding path program 1 times [2019-09-09 19:53:16,684 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:53:16,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:53:16,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:53:16,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:53:16,686 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:53:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:53:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 106 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 19:53:16,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:53:16,917 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:53:16,918 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2019-09-09 19:53:16,922 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [567], [569], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [720], [721], [725], [728], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 19:53:17,015 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:53:17,016 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:53:21,056 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:53:21,058 INFO L272 AbstractInterpreter]: Visited 88 different actions 88 times. Never merged. Never widened. Performed 215 root evaluator evaluations with a maximum evaluation depth of 14. Performed 215 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 19:53:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:53:21,063 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:53:24,660 INFO L227 lantSequenceWeakener]: Weakened 205 states. On average, predicates are now at 78.34% of their original sizes. [2019-09-09 19:53:24,660 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:53:24,735 INFO L420 sIntCurrentIteration]: We unified 223 AI predicates to 223 [2019-09-09 19:53:24,735 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:53:24,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:53:24,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 19:53:24,737 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:53:24,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 19:53:24,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 19:53:24,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 19:53:24,738 INFO L87 Difference]: Start difference. First operand 4965 states and 7684 transitions. Second operand 10 states. [2019-09-09 19:53:39,470 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.