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/Problem01_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 06:12:58,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 06:12:58,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 06:12:58,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 06:12:58,597 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 06:12:58,611 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 06:12:58,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 06:12:58,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 06:12:58,612 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 06:12:58,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 06:12:58,613 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 06:12:58,613 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 06:12:58,613 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 06:12:58,614 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 06:12:58,614 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 06:12:58,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 06:12:58,615 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 06:12:58,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 06:12:58,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 06:12:58,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 06:12:58,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 06:12:58,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 06:12:58,616 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 06:12:58,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 06:12:58,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 06:12:58,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 06:12:58,617 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 06:12:58,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 06:12:58,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 06:12:58,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 06:12:58,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 06:12:58,618 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 06:12:58,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 06:12:58,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 06:12:58,618 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 06:12:58,647 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 06:12:58,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 06:12:58,663 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 06:12:58,664 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 06:12:58,665 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 06:12:58,665 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label32.c [2019-09-09 06:12:58,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bac477d43/420e80e5f9a946309c28193bc8e74f27/FLAG6147d22d6 [2019-09-09 06:12:59,336 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 06:12:59,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label32.c [2019-09-09 06:12:59,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bac477d43/420e80e5f9a946309c28193bc8e74f27/FLAG6147d22d6 [2019-09-09 06:12:59,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bac477d43/420e80e5f9a946309c28193bc8e74f27 [2019-09-09 06:12:59,590 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 06:12:59,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 06:12:59,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 06:12:59,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 06:12:59,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 06:12:59,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:12:59" (1/1) ... [2019-09-09 06:12:59,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a85358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:12:59, skipping insertion in model container [2019-09-09 06:12:59,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:12:59" (1/1) ... [2019-09-09 06:12:59,608 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 06:12:59,664 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 06:13:00,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:13:00,207 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 06:13:00,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:13:00,353 INFO L192 MainTranslator]: Completed translation [2019-09-09 06:13:00,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00 WrapperNode [2019-09-09 06:13:00,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 06:13:00,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 06:13:00,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 06:13:00,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 06:13:00,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00" (1/1) ... [2019-09-09 06:13:00,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00" (1/1) ... [2019-09-09 06:13:00,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00" (1/1) ... [2019-09-09 06:13:00,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00" (1/1) ... [2019-09-09 06:13:00,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00" (1/1) ... [2019-09-09 06:13:00,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00" (1/1) ... [2019-09-09 06:13:00,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00" (1/1) ... [2019-09-09 06:13:00,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 06:13:00,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 06:13:00,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 06:13:00,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 06:13:00,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00" (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 06:13:00,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 06:13:00,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 06:13:00,538 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 06:13:00,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 06:13:00,538 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 06:13:00,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 06:13:00,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 06:13:00,538 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 06:13:00,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 06:13:00,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 06:13:00,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 06:13:01,718 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 06:13:01,718 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 06:13:01,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:13:01 BoogieIcfgContainer [2019-09-09 06:13:01,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 06:13:01,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 06:13:01,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 06:13:01,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 06:13:01,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:12:59" (1/3) ... [2019-09-09 06:13:01,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb2bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:13:01, skipping insertion in model container [2019-09-09 06:13:01,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:13:00" (2/3) ... [2019-09-09 06:13:01,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb2bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:13:01, skipping insertion in model container [2019-09-09 06:13:01,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:13:01" (3/3) ... [2019-09-09 06:13:01,729 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label32.c [2019-09-09 06:13:01,741 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 06:13:01,751 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 06:13:01,768 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 06:13:01,795 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 06:13:01,796 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 06:13:01,796 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 06:13:01,796 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 06:13:01,797 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 06:13:01,797 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 06:13:01,797 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 06:13:01,797 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 06:13:01,819 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-09-09 06:13:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-09 06:13:01,833 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:13:01,834 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] [2019-09-09 06:13:01,836 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:13:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:13:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash 312324590, now seen corresponding path program 1 times [2019-09-09 06:13:01,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:13:01,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:13:01,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:13:01,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:13:01,899 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:13:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:13:02,314 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 06:13:02,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:13:02,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 06:13:02,318 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:13:02,329 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 06:13:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 06:13:02,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:13:02,353 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-09-09 06:13:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:13:03,248 INFO L93 Difference]: Finished difference Result 346 states and 487 transitions. [2019-09-09 06:13:03,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 06:13:03,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2019-09-09 06:13:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:13:03,278 INFO L225 Difference]: With dead ends: 346 [2019-09-09 06:13:03,278 INFO L226 Difference]: Without dead ends: 278 [2019-09-09 06:13:03,281 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 06:13:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-09-09 06:13:03,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-09-09 06:13:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-09-09 06:13:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-09-09 06:13:03,395 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 80 [2019-09-09 06:13:03,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:13:03,396 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-09-09 06:13:03,396 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 06:13:03,396 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-09-09 06:13:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-09 06:13:03,408 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:13:03,409 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 06:13:03,411 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:13:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:13:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2042606981, now seen corresponding path program 1 times [2019-09-09 06:13:03,413 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:13:03,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:13:03,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:13:03,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:13:03,415 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:13:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:13:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:13:03,565 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:13:03,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 06:13:03,565 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:13:03,567 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 06:13:03,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 06:13:03,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 06:13:03,568 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-09-09 06:13:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:13:04,396 INFO L93 Difference]: Finished difference Result 568 states and 814 transitions. [2019-09-09 06:13:04,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 06:13:04,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2019-09-09 06:13:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:13:04,403 INFO L225 Difference]: With dead ends: 568 [2019-09-09 06:13:04,403 INFO L226 Difference]: Without dead ends: 568 [2019-09-09 06:13:04,404 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 06:13:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-09-09 06:13:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-09-09 06:13:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-09-09 06:13:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-09-09 06:13:04,461 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 90 [2019-09-09 06:13:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:13:04,463 INFO L475 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-09-09 06:13:04,463 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 06:13:04,464 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-09-09 06:13:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-09 06:13:04,471 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:13:04,472 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 06:13:04,472 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:13:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:13:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2007117511, now seen corresponding path program 1 times [2019-09-09 06:13:04,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:13:04,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:13:04,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:13:04,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:13:04,474 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:13:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:13:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:13:04,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 06:13:04,661 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 06:13:04,662 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 92 with the following transitions: [2019-09-09 06:13:04,664 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [162], [166], [170], [174], [178], [182], [186], [190], [194], [198], [202], [206], [210], [214], [218], [222], [226], [230], [234], [238], [242], [246], [250], [254], [258], [262], [266], [273], [281], [285], [287], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-09-09 06:13:04,710 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 06:13:04,711 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)