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/Problem12_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 16:49:30,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 16:49:30,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 16:49:30,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 16:49:30,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 16:49:30,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 16:49:30,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 16:49:30,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 16:49:30,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 16:49:30,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 16:49:30,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 16:49:30,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 16:49:30,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 16:49:30,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 16:49:30,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 16:49:30,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 16:49:30,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 16:49:30,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 16:49:30,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 16:49:30,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 16:49:30,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 16:49:30,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 16:49:30,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 16:49:30,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 16:49:30,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 16:49:30,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 16:49:30,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 16:49:30,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 16:49:30,812 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 16:49:30,835 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 16:49:30,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 16:49:30,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 16:49:30,836 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 16:49:30,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 16:49:30,837 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 16:49:30,837 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 16:49:30,837 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 16:49:30,838 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 16:49:30,838 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 16:49:30,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 16:49:30,839 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 16:49:30,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 16:49:30,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 16:49:30,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 16:49:30,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 16:49:30,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 16:49:30,840 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 16:49:30,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 16:49:30,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 16:49:30,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 16:49:30,841 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 16:49:30,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 16:49:30,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 16:49:30,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 16:49:30,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 16:49:30,842 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 16:49:30,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 16:49:30,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 16:49:30,842 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 16:49:30,870 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 16:49:30,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 16:49:30,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 16:49:30,890 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 16:49:30,890 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 16:49:30,891 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label57.c [2019-09-09 16:49:30,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3662abb83/8c5397875b044bfd8f517d896cf88050/FLAG1765d364e [2019-09-09 16:49:31,693 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 16:49:31,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label57.c [2019-09-09 16:49:31,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3662abb83/8c5397875b044bfd8f517d896cf88050/FLAG1765d364e [2019-09-09 16:49:31,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3662abb83/8c5397875b044bfd8f517d896cf88050 [2019-09-09 16:49:31,826 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 16:49:31,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 16:49:31,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 16:49:31,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 16:49:31,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 16:49:31,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:49:31" (1/1) ... [2019-09-09 16:49:31,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf01bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:31, skipping insertion in model container [2019-09-09 16:49:31,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 04:49:31" (1/1) ... [2019-09-09 16:49:31,847 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 16:49:32,006 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 16:49:33,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:49:33,383 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 16:49:34,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 16:49:34,103 INFO L192 MainTranslator]: Completed translation [2019-09-09 16:49:34,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34 WrapperNode [2019-09-09 16:49:34,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 16:49:34,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 16:49:34,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 16:49:34,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 16:49:34,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34" (1/1) ... [2019-09-09 16:49:34,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34" (1/1) ... [2019-09-09 16:49:34,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34" (1/1) ... [2019-09-09 16:49:34,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34" (1/1) ... [2019-09-09 16:49:34,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34" (1/1) ... [2019-09-09 16:49:34,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34" (1/1) ... [2019-09-09 16:49:34,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34" (1/1) ... [2019-09-09 16:49:34,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 16:49:34,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 16:49:34,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 16:49:34,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 16:49:34,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34" (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 16:49:34,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 16:49:34,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 16:49:34,466 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 16:49:34,466 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 16:49:34,466 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 16:49:34,466 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 16:49:34,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 16:49:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 16:49:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 16:49:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 16:49:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 16:49:34,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 16:49:34,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 16:49:34,469 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 16:49:34,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 16:49:34,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 16:49:34,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 16:49:39,381 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 16:49:39,381 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 16:49:39,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:49:39 BoogieIcfgContainer [2019-09-09 16:49:39,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 16:49:39,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 16:49:39,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 16:49:39,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 16:49:39,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 04:49:31" (1/3) ... [2019-09-09 16:49:39,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd84027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:49:39, skipping insertion in model container [2019-09-09 16:49:39,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 04:49:34" (2/3) ... [2019-09-09 16:49:39,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd84027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 04:49:39, skipping insertion in model container [2019-09-09 16:49:39,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 04:49:39" (3/3) ... [2019-09-09 16:49:39,392 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label57.c [2019-09-09 16:49:39,403 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 16:49:39,414 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 16:49:39,431 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 16:49:39,465 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 16:49:39,466 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 16:49:39,466 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 16:49:39,466 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 16:49:39,466 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 16:49:39,466 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 16:49:39,467 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 16:49:39,467 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 16:49:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 16:49:39,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-09 16:49:39,532 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:49:39,533 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] [2019-09-09 16:49:39,535 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:49:39,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:49:39,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1218214590, now seen corresponding path program 1 times [2019-09-09 16:49:39,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:49:39,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:39,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:49:39,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:39,600 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:49:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:49:39,963 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 16:49:39,965 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:49:39,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 16:49:39,965 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:49:39,971 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 16:49:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 16:49:39,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:49:39,988 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 4 states. [2019-09-09 16:49:48,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:49:48,599 INFO L93 Difference]: Finished difference Result 2397 states and 3955 transitions. [2019-09-09 16:49:48,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 16:49:48,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-09-09 16:49:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:49:48,642 INFO L225 Difference]: With dead ends: 2397 [2019-09-09 16:49:48,643 INFO L226 Difference]: Without dead ends: 2309 [2019-09-09 16:49:48,645 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 16:49:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-09-09 16:49:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2019-09-09 16:49:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2019-09-09 16:49:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3821 transitions. [2019-09-09 16:49:48,808 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3821 transitions. Word has length 43 [2019-09-09 16:49:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:49:48,808 INFO L475 AbstractCegarLoop]: Abstraction has 2309 states and 3821 transitions. [2019-09-09 16:49:48,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 16:49:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3821 transitions. [2019-09-09 16:49:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-09 16:49:48,816 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:49:48,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:48,817 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:49:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:49:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1597052053, now seen corresponding path program 1 times [2019-09-09 16:49:48,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:49:48,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:48,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:49:48,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:48,819 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:49:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:49:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 16:49:49,097 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 16:49:49,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 16:49:49,098 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:49:49,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 16:49:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 16:49:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 16:49:49,100 INFO L87 Difference]: Start difference. First operand 2309 states and 3821 transitions. Second operand 6 states. [2019-09-09 16:49:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 16:49:55,923 INFO L93 Difference]: Finished difference Result 4742 states and 7592 transitions. [2019-09-09 16:49:55,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 16:49:55,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-09-09 16:49:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 16:49:55,966 INFO L225 Difference]: With dead ends: 4742 [2019-09-09 16:49:55,966 INFO L226 Difference]: Without dead ends: 4742 [2019-09-09 16:49:55,967 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 16:49:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2019-09-09 16:49:56,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2019-09-09 16:49:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2019-09-09 16:49:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 7460 transitions. [2019-09-09 16:49:56,119 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 7460 transitions. Word has length 142 [2019-09-09 16:49:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 16:49:56,122 INFO L475 AbstractCegarLoop]: Abstraction has 4697 states and 7460 transitions. [2019-09-09 16:49:56,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 16:49:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 7460 transitions. [2019-09-09 16:49:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-09 16:49:56,134 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 16:49:56,134 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, 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] [2019-09-09 16:49:56,135 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 16:49:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:49:56,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1033713367, now seen corresponding path program 1 times [2019-09-09 16:49:56,136 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 16:49:56,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:56,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 16:49:56,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 16:49:56,138 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 16:49:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 16:49:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 72 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 16:49:56,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 16:49:56,374 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 16:49:56,375 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2019-09-09 16:49:56,377 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2119], [2121], [2124], [2132], [2140], [2148], [2156], [2164], [2172], [2180], [2188], [2196], [2204], [2212], [2220], [2228], [2236], [2244], [2252], [2260], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2368], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2404], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 16:49:56,452 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 16:49:56,452 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 16:50:05,349 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 16:50:05,352 INFO L272 AbstractInterpreter]: Visited 85 different actions 85 times. Never merged. Never widened. Performed 214 root evaluator evaluations with a maximum evaluation depth of 16. Performed 214 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 16:50:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 16:50:05,356 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 16:50:15,019 INFO L227 lantSequenceWeakener]: Weakened 175 states. On average, predicates are now at 75.74% of their original sizes. [2019-09-09 16:50:15,019 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 16:50:15,138 INFO L420 sIntCurrentIteration]: We unified 193 AI predicates to 193 [2019-09-09 16:50:15,138 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 16:50:15,139 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 16:50:15,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2019-09-09 16:50:15,140 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 16:50:15,140 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 16:50:15,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 16:50:15,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 16:50:15,146 INFO L87 Difference]: Start difference. First operand 4697 states and 7460 transitions. Second operand 11 states. [2019-09-09 16:53:18,139 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.