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/Problem18_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:20:27,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:20:27,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:20:27,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 22:20:27,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 22:20:27,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 22:20:27,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 22:20:27,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 22:20:27,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 22:20:27,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 22:20:27,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 22:20:27,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 22:20:27,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 22:20:27,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 22:20:27,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 22:20:27,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 22:20:27,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 22:20:27,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 22:20:27,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 22:20:27,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 22:20:27,715 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 22:20:27,730 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:20:27,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:20:27,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:20:27,731 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:20:27,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:20:27,731 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:20:27,731 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:20:27,732 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:20:27,732 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:20:27,732 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:20:27,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:20:27,733 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:20:27,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:20:27,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:20:27,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:20:27,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:20:27,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:20:27,734 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:20:27,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:20:27,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:20:27,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:20:27,735 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:20:27,735 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:20:27,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:20:27,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:20:27,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:20:27,736 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:20:27,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:20:27,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:20:27,736 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:20:27,764 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:20:27,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:20:27,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:20:27,781 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:20:27,781 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:20:27,782 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label31.c [2019-09-09 22:20:27,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7617e7f74/90824385aebc42a7a867e7fea0201a30/FLAG4d8ba180b [2019-09-09 22:20:28,568 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:20:28,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label31.c [2019-09-09 22:20:28,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7617e7f74/90824385aebc42a7a867e7fea0201a30/FLAG4d8ba180b [2019-09-09 22:20:28,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7617e7f74/90824385aebc42a7a867e7fea0201a30 [2019-09-09 22:20:28,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:20:28,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:20:28,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:20:28,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:20:28,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:20:28,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:20:28" (1/1) ... [2019-09-09 22:20:28,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a46f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:28, skipping insertion in model container [2019-09-09 22:20:28,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:20:28" (1/1) ... [2019-09-09 22:20:28,727 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:20:28,871 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:20:29,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:20:29,997 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:20:30,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:20:30,502 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:20:30,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30 WrapperNode [2019-09-09 22:20:30,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:20:30,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:20:30,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:20:30,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:20:30,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30" (1/1) ... [2019-09-09 22:20:30,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30" (1/1) ... [2019-09-09 22:20:30,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30" (1/1) ... [2019-09-09 22:20:30,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30" (1/1) ... [2019-09-09 22:20:30,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30" (1/1) ... [2019-09-09 22:20:30,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30" (1/1) ... [2019-09-09 22:20:30,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30" (1/1) ... [2019-09-09 22:20:30,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:20:30,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:20:30,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:20:30,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:20:30,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30" (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 22:20:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:20:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:20:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:20:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:20:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:20:30,860 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:20:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:20:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:20:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:20:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:20:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:20:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:20:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:20:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:20:30,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:20:34,522 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:20:34,522 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:20:34,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:20:34 BoogieIcfgContainer [2019-09-09 22:20:34,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:20:34,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:20:34,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:20:34,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:20:34,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:20:28" (1/3) ... [2019-09-09 22:20:34,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4edac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:20:34, skipping insertion in model container [2019-09-09 22:20:34,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:30" (2/3) ... [2019-09-09 22:20:34,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4edac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:20:34, skipping insertion in model container [2019-09-09 22:20:34,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:20:34" (3/3) ... [2019-09-09 22:20:34,543 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label31.c [2019-09-09 22:20:34,556 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:20:34,567 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:20:34,587 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:20:34,619 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:20:34,619 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:20:34,619 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:20:34,620 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:20:34,620 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:20:34,620 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:20:34,620 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:20:34,621 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:20:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:20:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-09 22:20:34,685 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:34,686 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] [2019-09-09 22:20:34,688 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:34,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:34,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1928729618, now seen corresponding path program 1 times [2019-09-09 22:20:34,696 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:34,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:34,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:34,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:34,738 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:35,025 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 22:20:35,028 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:20:35,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:20:35,028 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:20:35,034 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:20:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:20:35,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:20:35,052 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:20:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:20:40,087 INFO L93 Difference]: Finished difference Result 1480 states and 2747 transitions. [2019-09-09 22:20:40,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:20:40,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-09-09 22:20:40,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:20:40,118 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:20:40,119 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:20:40,120 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 22:20:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:20:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:20:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:20:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-09-09 22:20:40,248 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 21 [2019-09-09 22:20:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:20:40,248 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-09-09 22:20:40,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:20:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-09-09 22:20:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-09 22:20:40,253 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:40,254 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] [2019-09-09 22:20:40,254 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1843464449, now seen corresponding path program 1 times [2019-09-09 22:20:40,255 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:40,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:40,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:40,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:40,256 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:40,517 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 22:20:40,517 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:20:40,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:20:40,518 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:20:40,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:20:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:20:40,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:20:40,522 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-09-09 22:20:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:20:46,789 INFO L93 Difference]: Finished difference Result 2888 states and 5180 transitions. [2019-09-09 22:20:46,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:20:46,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2019-09-09 22:20:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:20:46,807 INFO L225 Difference]: With dead ends: 2888 [2019-09-09 22:20:46,808 INFO L226 Difference]: Without dead ends: 2888 [2019-09-09 22:20:46,809 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 22:20:46,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-09-09 22:20:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-09-09 22:20:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-09-09 22:20:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 5126 transitions. [2019-09-09 22:20:46,900 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 5126 transitions. Word has length 94 [2019-09-09 22:20:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:20:46,901 INFO L475 AbstractCegarLoop]: Abstraction has 2864 states and 5126 transitions. [2019-09-09 22:20:46,901 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:20:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 5126 transitions. [2019-09-09 22:20:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-09-09 22:20:46,917 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:46,918 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] [2019-09-09 22:20:46,918 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash -854297522, now seen corresponding path program 1 times [2019-09-09 22:20:46,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:46,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:46,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:46,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:46,922 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:47,198 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 22:20:47,199 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:20:47,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:20:47,200 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:20:47,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:20:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:20:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:20:47,203 INFO L87 Difference]: Start difference. First operand 2864 states and 5126 transitions. Second operand 6 states. [2019-09-09 22:20:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:20:53,554 INFO L93 Difference]: Finished difference Result 4355 states and 7372 transitions. [2019-09-09 22:20:53,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:20:53,559 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2019-09-09 22:20:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:20:53,581 INFO L225 Difference]: With dead ends: 4355 [2019-09-09 22:20:53,582 INFO L226 Difference]: Without dead ends: 4355 [2019-09-09 22:20:53,582 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 22:20:53,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2019-09-09 22:20:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 4331. [2019-09-09 22:20:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-09-09 22:20:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 7302 transitions. [2019-09-09 22:20:53,689 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 7302 transitions. Word has length 183 [2019-09-09 22:20:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:20:53,690 INFO L475 AbstractCegarLoop]: Abstraction has 4331 states and 7302 transitions. [2019-09-09 22:20:53,690 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:20:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 7302 transitions. [2019-09-09 22:20:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-09-09 22:20:53,694 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:53,695 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 22:20:53,695 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash 691302170, now seen corresponding path program 1 times [2019-09-09 22:20:53,696 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:53,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:53,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:53,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:53,697 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 28 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 22:20:53,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:20:53,927 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:20:53,928 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 226 with the following transitions: [2019-09-09 22:20:53,930 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1699], [1701], [1704], [1712], [1720], [1728], [1736], [1744], [1752], [1760], [1768], [1776], [1784], [1792], [1800], [1808], [1816], [1824], [1832], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2216], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2280], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:20:53,990 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:20:53,990 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:20:59,974 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:20:59,976 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Performed 269 root evaluator evaluations with a maximum evaluation depth of 13. Performed 269 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:20:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:59,980 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:21:05,994 INFO L227 lantSequenceWeakener]: Weakened 206 states. On average, predicates are now at 77.48% of their original sizes. [2019-09-09 22:21:05,995 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:21:06,065 INFO L420 sIntCurrentIteration]: We unified 224 AI predicates to 224 [2019-09-09 22:21:06,066 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:21:06,069 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:21:06,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 22:21:06,069 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:21:06,070 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:21:06,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:21:06,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:21:06,070 INFO L87 Difference]: Start difference. First operand 4331 states and 7302 transitions. Second operand 10 states. [2019-09-09 22:22:43,802 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.