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/Problem03_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 08:10:19,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 08:10:19,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 08:10:19,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 08:10:19,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 08:10:19,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 08:10:19,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 08:10:19,358 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 08:10:19,385 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 08:10:19,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 08:10:19,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 08:10:19,387 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 08:10:19,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 08:10:19,388 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 08:10:19,388 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 08:10:19,388 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 08:10:19,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 08:10:19,389 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 08:10:19,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 08:10:19,391 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 08:10:19,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 08:10:19,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 08:10:19,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 08:10:19,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 08:10:19,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 08:10:19,393 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 08:10:19,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 08:10:19,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 08:10:19,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 08:10:19,394 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 08:10:19,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 08:10:19,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 08:10:19,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 08:10:19,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 08:10:19,395 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 08:10:19,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 08:10:19,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 08:10:19,396 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 08:10:19,450 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 08:10:19,465 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 08:10:19,469 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 08:10:19,471 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 08:10:19,472 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 08:10:19,473 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label57.c [2019-09-09 08:10:19,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f98b2ee69/df9fed24d3d349a0a4d720c8c563d6f0/FLAG54a3b3d0a [2019-09-09 08:10:20,205 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 08:10:20,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label57.c [2019-09-09 08:10:20,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f98b2ee69/df9fed24d3d349a0a4d720c8c563d6f0/FLAG54a3b3d0a [2019-09-09 08:10:20,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f98b2ee69/df9fed24d3d349a0a4d720c8c563d6f0 [2019-09-09 08:10:20,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 08:10:20,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 08:10:20,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 08:10:20,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 08:10:20,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 08:10:20,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:10:20" (1/1) ... [2019-09-09 08:10:20,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c29b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:20, skipping insertion in model container [2019-09-09 08:10:20,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:10:20" (1/1) ... [2019-09-09 08:10:20,391 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 08:10:20,477 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 08:10:21,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 08:10:21,355 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 08:10:21,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 08:10:21,677 INFO L192 MainTranslator]: Completed translation [2019-09-09 08:10:21,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21 WrapperNode [2019-09-09 08:10:21,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 08:10:21,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 08:10:21,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 08:10:21,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 08:10:21,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21" (1/1) ... [2019-09-09 08:10:21,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21" (1/1) ... [2019-09-09 08:10:21,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21" (1/1) ... [2019-09-09 08:10:21,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21" (1/1) ... [2019-09-09 08:10:21,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21" (1/1) ... [2019-09-09 08:10:21,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21" (1/1) ... [2019-09-09 08:10:21,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21" (1/1) ... [2019-09-09 08:10:21,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 08:10:21,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 08:10:21,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 08:10:21,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 08:10:21,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21" (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 08:10:21,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 08:10:21,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 08:10:21,956 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 08:10:21,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 08:10:21,956 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 08:10:21,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 08:10:21,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 08:10:21,957 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 08:10:21,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 08:10:21,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 08:10:21,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 08:10:24,023 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 08:10:24,024 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 08:10:24,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:10:24 BoogieIcfgContainer [2019-09-09 08:10:24,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 08:10:24,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 08:10:24,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 08:10:24,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 08:10:24,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:10:20" (1/3) ... [2019-09-09 08:10:24,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e565cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:10:24, skipping insertion in model container [2019-09-09 08:10:24,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:10:21" (2/3) ... [2019-09-09 08:10:24,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e565cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:10:24, skipping insertion in model container [2019-09-09 08:10:24,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:10:24" (3/3) ... [2019-09-09 08:10:24,034 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label57.c [2019-09-09 08:10:24,045 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 08:10:24,055 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 08:10:24,073 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 08:10:24,103 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 08:10:24,103 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 08:10:24,103 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 08:10:24,103 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 08:10:24,103 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 08:10:24,104 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 08:10:24,104 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 08:10:24,104 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 08:10:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-09-09 08:10:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-09-09 08:10:24,150 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:10:24,151 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:24,153 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:10:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:10:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1381025472, now seen corresponding path program 1 times [2019-09-09 08:10:24,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:10:24,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:24,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:10:24,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:24,225 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:10:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:10:24,927 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 08:10:24,929 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:10:24,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 08:10:24,930 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:10:24,936 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 08:10:24,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 08:10:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 08:10:24,955 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-09-09 08:10:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:10:26,432 INFO L93 Difference]: Finished difference Result 536 states and 821 transitions. [2019-09-09 08:10:26,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 08:10:26,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 167 [2019-09-09 08:10:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:10:26,456 INFO L225 Difference]: With dead ends: 536 [2019-09-09 08:10:26,457 INFO L226 Difference]: Without dead ends: 468 [2019-09-09 08:10:26,459 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 08:10:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2019-09-09 08:10:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 463. [2019-09-09 08:10:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-09-09 08:10:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 714 transitions. [2019-09-09 08:10:26,553 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 714 transitions. Word has length 167 [2019-09-09 08:10:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:10:26,554 INFO L475 AbstractCegarLoop]: Abstraction has 463 states and 714 transitions. [2019-09-09 08:10:26,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 08:10:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 714 transitions. [2019-09-09 08:10:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-09 08:10:26,560 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:10:26,561 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:26,561 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:10:26,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:10:26,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1492818988, now seen corresponding path program 1 times [2019-09-09 08:10:26,562 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:10:26,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:26,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:10:26,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:26,564 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:10:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:10:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:10:26,967 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:10:26,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 08:10:26,967 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:10:26,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 08:10:26,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 08:10:26,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 08:10:26,972 INFO L87 Difference]: Start difference. First operand 463 states and 714 transitions. Second operand 3 states. [2019-09-09 08:10:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:10:28,173 INFO L93 Difference]: Finished difference Result 890 states and 1299 transitions. [2019-09-09 08:10:28,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 08:10:28,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2019-09-09 08:10:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:10:28,194 INFO L225 Difference]: With dead ends: 890 [2019-09-09 08:10:28,194 INFO L226 Difference]: Without dead ends: 890 [2019-09-09 08:10:28,195 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 08:10:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2019-09-09 08:10:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2019-09-09 08:10:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-09-09 08:10:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1295 transitions. [2019-09-09 08:10:28,252 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1295 transitions. Word has length 179 [2019-09-09 08:10:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:10:28,253 INFO L475 AbstractCegarLoop]: Abstraction has 888 states and 1295 transitions. [2019-09-09 08:10:28,254 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 08:10:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1295 transitions. [2019-09-09 08:10:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-09 08:10:28,262 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:10:28,262 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:28,263 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:10:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:10:28,263 INFO L82 PathProgramCache]: Analyzing trace with hash -977078088, now seen corresponding path program 1 times [2019-09-09 08:10:28,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:10:28,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:28,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:10:28,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:28,265 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:10:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:10:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:10:28,547 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:10:28,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 08:10:28,548 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:10:28,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 08:10:28,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 08:10:28,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 08:10:28,550 INFO L87 Difference]: Start difference. First operand 888 states and 1295 transitions. Second operand 3 states. [2019-09-09 08:10:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:10:29,756 INFO L93 Difference]: Finished difference Result 1735 states and 2545 transitions. [2019-09-09 08:10:29,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 08:10:29,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-09-09 08:10:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:10:29,771 INFO L225 Difference]: With dead ends: 1735 [2019-09-09 08:10:29,771 INFO L226 Difference]: Without dead ends: 1735 [2019-09-09 08:10:29,771 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 08:10:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2019-09-09 08:10:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1718. [2019-09-09 08:10:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2019-09-09 08:10:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2511 transitions. [2019-09-09 08:10:29,824 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2511 transitions. Word has length 181 [2019-09-09 08:10:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:10:29,825 INFO L475 AbstractCegarLoop]: Abstraction has 1718 states and 2511 transitions. [2019-09-09 08:10:29,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 08:10:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2511 transitions. [2019-09-09 08:10:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-09 08:10:29,833 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:10:29,834 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:29,834 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:10:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:10:29,835 INFO L82 PathProgramCache]: Analyzing trace with hash -58398893, now seen corresponding path program 1 times [2019-09-09 08:10:29,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:10:29,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:29,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:10:29,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:29,837 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:10:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:10:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:10:30,015 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 08:10:30,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 08:10:30,016 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 08:10:30,016 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 08:10:30,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 08:10:30,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 08:10:30,017 INFO L87 Difference]: Start difference. First operand 1718 states and 2511 transitions. Second operand 6 states. [2019-09-09 08:10:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 08:10:31,904 INFO L93 Difference]: Finished difference Result 3519 states and 5628 transitions. [2019-09-09 08:10:31,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-09 08:10:31,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 184 [2019-09-09 08:10:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 08:10:31,945 INFO L225 Difference]: With dead ends: 3519 [2019-09-09 08:10:31,945 INFO L226 Difference]: Without dead ends: 3519 [2019-09-09 08:10:31,946 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 08:10:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2019-09-09 08:10:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3443. [2019-09-09 08:10:32,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3443 states. [2019-09-09 08:10:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 5146 transitions. [2019-09-09 08:10:32,103 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 5146 transitions. Word has length 184 [2019-09-09 08:10:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 08:10:32,103 INFO L475 AbstractCegarLoop]: Abstraction has 3443 states and 5146 transitions. [2019-09-09 08:10:32,104 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 08:10:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 5146 transitions. [2019-09-09 08:10:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-09-09 08:10:32,117 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 08:10:32,118 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:10:32,118 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 08:10:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 08:10:32,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1467670383, now seen corresponding path program 1 times [2019-09-09 08:10:32,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 08:10:32,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:32,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 08:10:32,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 08:10:32,120 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 08:10:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 08:10:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 08:10:32,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 08:10:32,263 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 08:10:32,264 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 193 with the following transitions: [2019-09-09 08:10:32,266 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [36], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [805], [807], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-09-09 08:10:32,337 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 08:10:32,337 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)