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_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:02:40,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:02:40,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:02:40,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 22:02:40,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 22:02:40,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 22:02:40,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 22:02:40,980 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 22:02:40,996 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:02:40,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:02:40,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:02:40,997 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:02:40,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:02:40,997 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:02:40,998 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:02:40,998 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:02:40,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:02:40,998 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:02:40,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:02:40,999 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:02:40,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:02:40,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:02:41,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:02:41,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:02:41,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:02:41,000 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:02:41,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:02:41,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:02:41,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:02:41,001 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:02:41,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:02:41,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:02:41,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:02:41,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:02:41,002 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:02:41,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:02:41,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:02:41,003 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:02:41,045 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:02:41,056 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:02:41,060 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:02:41,061 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:02:41,062 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:02:41,062 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label11.c [2019-09-09 22:02:41,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2115852fb/3007fd6d90ba4c43a8cd1a9cee9b6c60/FLAG26b324c40 [2019-09-09 22:02:41,889 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:02:41,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label11.c [2019-09-09 22:02:41,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2115852fb/3007fd6d90ba4c43a8cd1a9cee9b6c60/FLAG26b324c40 [2019-09-09 22:02:41,993 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2115852fb/3007fd6d90ba4c43a8cd1a9cee9b6c60 [2019-09-09 22:02:42,007 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:02:42,009 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:02:42,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:02:42,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:02:42,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:02:42,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:02:41" (1/1) ... [2019-09-09 22:02:42,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa16274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:42, skipping insertion in model container [2019-09-09 22:02:42,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:02:41" (1/1) ... [2019-09-09 22:02:42,033 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:02:42,184 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:02:43,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:02:43,717 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:02:44,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:02:44,194 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:02:44,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44 WrapperNode [2019-09-09 22:02:44,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:02:44,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:02:44,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:02:44,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:02:44,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44" (1/1) ... [2019-09-09 22:02:44,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44" (1/1) ... [2019-09-09 22:02:44,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44" (1/1) ... [2019-09-09 22:02:44,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44" (1/1) ... [2019-09-09 22:02:44,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44" (1/1) ... [2019-09-09 22:02:44,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44" (1/1) ... [2019-09-09 22:02:44,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44" (1/1) ... [2019-09-09 22:02:44,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:02:44,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:02:44,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:02:44,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:02:44,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44" (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 22:02:44,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:02:44,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:02:44,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:02:44,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:02:44,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:02:44,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:02:44,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:02:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:02:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:02:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:02:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:02:44,590 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:02:44,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:02:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:02:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:02:48,660 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:02:48,660 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:02:48,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:02:48 BoogieIcfgContainer [2019-09-09 22:02:48,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:02:48,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:02:48,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:02:48,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:02:48,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:02:41" (1/3) ... [2019-09-09 22:02:48,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4b73df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:02:48, skipping insertion in model container [2019-09-09 22:02:48,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:02:44" (2/3) ... [2019-09-09 22:02:48,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4b73df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:02:48, skipping insertion in model container [2019-09-09 22:02:48,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:02:48" (3/3) ... [2019-09-09 22:02:48,684 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label11.c [2019-09-09 22:02:48,695 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:02:48,706 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:02:48,725 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:02:48,758 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:02:48,758 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:02:48,758 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:02:48,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:02:48,759 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:02:48,759 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:02:48,759 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:02:48,759 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:02:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:02:48,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-09 22:02:48,822 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:02:48,824 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] [2019-09-09 22:02:48,826 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:02:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:02:48,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1042189663, now seen corresponding path program 1 times [2019-09-09 22:02:48,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:02:48,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:02:48,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:02:48,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:02:48,891 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:02:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:02:49,161 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 22:02:49,164 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:02:49,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:02:49,165 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:02:49,171 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:02:49,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:02:49,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:02:49,189 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:02:53,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:02:53,605 INFO L93 Difference]: Finished difference Result 1480 states and 2661 transitions. [2019-09-09 22:02:53,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:02:53,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-09-09 22:02:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:02:53,649 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:02:53,649 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:02:53,651 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 22:02:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:02:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:02:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:02:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2552 transitions. [2019-09-09 22:02:53,811 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2552 transitions. Word has length 48 [2019-09-09 22:02:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:02:53,813 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2552 transitions. [2019-09-09 22:02:53,813 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:02:53,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2552 transitions. [2019-09-09 22:02:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-09 22:02:53,826 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:02:53,827 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:53,827 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:02:53,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:02:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1983900164, now seen corresponding path program 1 times [2019-09-09 22:02:53,829 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:02:53,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:02:53,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:02:53,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:02:53,831 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:02:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:02:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:02:54,094 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:02:54,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:02:54,094 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:02:54,096 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:02:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:02:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:02:54,097 INFO L87 Difference]: Start difference. First operand 1412 states and 2552 transitions. Second operand 5 states. [2019-09-09 22:02:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:02:59,720 INFO L93 Difference]: Finished difference Result 2885 states and 4689 transitions. [2019-09-09 22:02:59,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:02:59,720 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-09-09 22:02:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:02:59,737 INFO L225 Difference]: With dead ends: 2885 [2019-09-09 22:02:59,737 INFO L226 Difference]: Without dead ends: 2885 [2019-09-09 22:02:59,738 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 22:02:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-09-09 22:02:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2861. [2019-09-09 22:02:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2019-09-09 22:02:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4635 transitions. [2019-09-09 22:02:59,822 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4635 transitions. Word has length 118 [2019-09-09 22:02:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:02:59,823 INFO L475 AbstractCegarLoop]: Abstraction has 2861 states and 4635 transitions. [2019-09-09 22:02:59,823 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:02:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4635 transitions. [2019-09-09 22:02:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 22:02:59,825 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:02:59,825 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:59,826 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:02:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:02:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1643691761, now seen corresponding path program 1 times [2019-09-09 22:02:59,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:02:59,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:02:59,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:02:59,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:02:59,828 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:02:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:02:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:02:59,959 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:02:59,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:02:59,960 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:02:59,960 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:02:59,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:02:59,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:02:59,961 INFO L87 Difference]: Start difference. First operand 2861 states and 4635 transitions. Second operand 6 states. [2019-09-09 22:03:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:03:09,443 INFO L93 Difference]: Finished difference Result 8175 states and 12168 transitions. [2019-09-09 22:03:09,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 22:03:09,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-09-09 22:03:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:03:09,502 INFO L225 Difference]: With dead ends: 8175 [2019-09-09 22:03:09,503 INFO L226 Difference]: Without dead ends: 8175 [2019-09-09 22:03:09,504 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:03:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2019-09-09 22:03:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8111. [2019-09-09 22:03:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8111 states. [2019-09-09 22:03:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 11699 transitions. [2019-09-09 22:03:09,843 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 11699 transitions. Word has length 123 [2019-09-09 22:03:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:03:09,845 INFO L475 AbstractCegarLoop]: Abstraction has 8111 states and 11699 transitions. [2019-09-09 22:03:09,845 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:03:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 11699 transitions. [2019-09-09 22:03:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-09 22:03:09,849 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:03:09,849 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:09,849 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:03:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:03:09,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1076419407, now seen corresponding path program 1 times [2019-09-09 22:03:09,850 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:03:09,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:03:09,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:03:09,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:03:09,852 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:03:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:03:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:03:10,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:03:10,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:03:10,040 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:03:10,040 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:03:10,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:03:10,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:03:10,041 INFO L87 Difference]: Start difference. First operand 8111 states and 11699 transitions. Second operand 6 states. [2019-09-09 22:03:15,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:03:15,367 INFO L93 Difference]: Finished difference Result 11951 states and 15872 transitions. [2019-09-09 22:03:15,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:03:15,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-09-09 22:03:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:03:15,423 INFO L225 Difference]: With dead ends: 11951 [2019-09-09 22:03:15,423 INFO L226 Difference]: Without dead ends: 11951 [2019-09-09 22:03:15,424 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 22:03:15,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11951 states. [2019-09-09 22:03:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11951 to 11190. [2019-09-09 22:03:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11190 states. [2019-09-09 22:03:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 14874 transitions. [2019-09-09 22:03:15,708 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 14874 transitions. Word has length 155 [2019-09-09 22:03:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:03:15,710 INFO L475 AbstractCegarLoop]: Abstraction has 11190 states and 14874 transitions. [2019-09-09 22:03:15,710 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:03:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 14874 transitions. [2019-09-09 22:03:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-09 22:03:15,717 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:03:15,717 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:03:15,717 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:03:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:03:15,718 INFO L82 PathProgramCache]: Analyzing trace with hash 114530806, now seen corresponding path program 1 times [2019-09-09 22:03:15,718 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:03:15,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:03:15,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:03:15,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:03:15,720 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:03:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:03:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:03:15,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:03:15,976 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:03:15,977 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2019-09-09 22:03:15,980 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1915], [1917], [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], [2156], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2264], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:03:16,054 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:03:16,055 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:03:23,195 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:03:23,197 INFO L272 AbstractInterpreter]: Visited 111 different actions 111 times. Never merged. Never widened. Performed 261 root evaluator evaluations with a maximum evaluation depth of 13. Performed 261 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:03:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:03:23,202 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:03:29,522 INFO L227 lantSequenceWeakener]: Weakened 214 states. On average, predicates are now at 78.04% of their original sizes. [2019-09-09 22:03:29,522 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:03:29,610 INFO L420 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2019-09-09 22:03:29,610 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:03:29,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:03:29,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 22:03:29,615 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:03:29,616 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:03:29,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:03:29,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:03:29,617 INFO L87 Difference]: Start difference. First operand 11190 states and 14874 transitions. Second operand 10 states. [2019-09-09 22:05:23,702 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.