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/Problem10_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:19:15,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:19:15,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:19:15,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:19:15,216 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 [2019-10-02 19:19:15,239 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:19:15,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:19:15,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:19:15,240 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:19:15,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:19:15,241 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:19:15,241 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:19:15,241 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:19:15,241 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:19:15,242 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:19:15,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:19:15,244 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:19:15,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:19:15,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:19:15,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:19:15,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:19:15,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:19:15,245 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:19:15,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:19:15,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:19:15,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:19:15,246 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:19:15,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:19:15,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:19:15,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:19:15,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:19:15,247 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:19:15,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:19:15,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:19:15,248 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:19:15,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:19:15,316 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:19:15,320 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:19:15,321 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:19:15,322 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:19:15,323 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label55.c [2019-10-02 19:19:15,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32eefdc6d/5728391bfec44188a0333476e8122d7d/FLAG1ba1b1747 [2019-10-02 19:19:15,966 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:19:15,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label55.c [2019-10-02 19:19:15,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32eefdc6d/5728391bfec44188a0333476e8122d7d/FLAG1ba1b1747 [2019-10-02 19:19:16,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32eefdc6d/5728391bfec44188a0333476e8122d7d [2019-10-02 19:19:16,293 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:19:16,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:19:16,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:19:16,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:19:16,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:19:16,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:19:16" (1/1) ... [2019-10-02 19:19:16,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bca6166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16, skipping insertion in model container [2019-10-02 19:19:16,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:19:16" (1/1) ... [2019-10-02 19:19:16,313 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:19:16,356 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:19:16,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:19:16,845 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:19:16,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:19:16,976 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:19:16,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16 WrapperNode [2019-10-02 19:19:16,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:19:16,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:19:16,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:19:16,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:19:16,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16" (1/1) ... [2019-10-02 19:19:16,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16" (1/1) ... [2019-10-02 19:19:17,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16" (1/1) ... [2019-10-02 19:19:17,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16" (1/1) ... [2019-10-02 19:19:17,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16" (1/1) ... [2019-10-02 19:19:17,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16" (1/1) ... [2019-10-02 19:19:17,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16" (1/1) ... [2019-10-02 19:19:17,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:19:17,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:19:17,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:19:17,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:19:17,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16" (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 [2019-10-02 19:19:17,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:19:17,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:19:17,175 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:19:17,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:19:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:19:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:19:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:19:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:19:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:19:17,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:19:17,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:19:18,523 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:19:18,524 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:19:18,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:19:18 BoogieIcfgContainer [2019-10-02 19:19:18,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:19:18,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:19:18,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:19:18,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:19:18,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:19:16" (1/3) ... [2019-10-02 19:19:18,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dad5e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:19:18, skipping insertion in model container [2019-10-02 19:19:18,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:19:16" (2/3) ... [2019-10-02 19:19:18,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dad5e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:19:18, skipping insertion in model container [2019-10-02 19:19:18,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:19:18" (3/3) ... [2019-10-02 19:19:18,535 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label55.c [2019-10-02 19:19:18,547 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:19:18,556 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:19:18,578 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:19:18,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:19:18,605 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:19:18,605 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:19:18,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:19:18,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:19:18,606 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:19:18,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:19:18,606 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:19:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 19:19:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-02 19:19:18,638 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:19:18,639 INFO L411 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] [2019-10-02 19:19:18,641 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:19:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:19:18,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1305395761, now seen corresponding path program 1 times [2019-10-02 19:19:18,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:19:18,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:19:18,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:19:18,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:19:18,704 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:19:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:19:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:19:18,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:19:18,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 19:19:18,881 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:19:18,887 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 19:19:18,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 19:19:18,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:19:18,904 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 19:19:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:19:19,942 INFO L93 Difference]: Finished difference Result 362 states and 553 transitions. [2019-10-02 19:19:19,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 19:19:19,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-02 19:19:19,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:19:19,972 INFO L225 Difference]: With dead ends: 362 [2019-10-02 19:19:19,972 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 19:19:19,974 INFO L640 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 [2019-10-02 19:19:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 19:19:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 19:19:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 19:19:20,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 436 transitions. [2019-10-02 19:19:20,057 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 436 transitions. Word has length 24 [2019-10-02 19:19:20,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:19:20,058 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 436 transitions. [2019-10-02 19:19:20,059 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 19:19:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 436 transitions. [2019-10-02 19:19:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-02 19:19:20,065 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:19:20,066 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-02 19:19:20,067 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:19:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:19:20,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1569128931, now seen corresponding path program 1 times [2019-10-02 19:19:20,068 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:19:20,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:19:20,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:19:20,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:19:20,071 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:19:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:19:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 19:19:20,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:19:20,421 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:19:20,422 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 112 with the following transitions: [2019-10-02 19:19:20,424 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [101], [103], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:19:20,467 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:19:20,467 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:19:36,334 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:19:36,336 INFO L272 AbstractInterpreter]: Visited 91 different actions 91 times. Never merged. Never widened. Performed 128 root evaluator evaluations with a maximum evaluation depth of 16. Performed 128 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 19:19:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:19:36,341 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:19:47,744 INFO L227 lantSequenceWeakener]: Weakened 105 states. On average, predicates are now at 72.7% of their original sizes. [2019-10-02 19:19:47,744 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:19:47,791 INFO L420 sIntCurrentIteration]: We unified 110 AI predicates to 110 [2019-10-02 19:19:47,791 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:19:47,792 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:19:47,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-10-02 19:19:47,792 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:19:47,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 19:19:47,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 19:19:47,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 19:19:47,795 INFO L87 Difference]: Start difference. First operand 294 states and 436 transitions. Second operand 7 states. [2019-10-02 19:19:52,162 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:22:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:22:41,420 INFO L93 Difference]: Finished difference Result 438 states and 586 transitions. [2019-10-02 19:22:41,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:22:41,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 111 [2019-10-02 19:22:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:22:41,426 INFO L225 Difference]: With dead ends: 438 [2019-10-02 19:22:41,426 INFO L226 Difference]: Without dead ends: 438 [2019-10-02 19:22:41,427 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-02 19:22:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-10-02 19:22:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2019-10-02 19:22:41,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-02 19:22:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 585 transitions. [2019-10-02 19:22:41,473 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 585 transitions. Word has length 111 [2019-10-02 19:22:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:22:41,476 INFO L475 AbstractCegarLoop]: Abstraction has 437 states and 585 transitions. [2019-10-02 19:22:41,476 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 19:22:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 585 transitions. [2019-10-02 19:22:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-02 19:22:41,485 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:22:41,485 INFO L411 BasicCegarLoop]: trace histogram [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, 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] [2019-10-02 19:22:41,486 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:22:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:22:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash 789281370, now seen corresponding path program 1 times [2019-10-02 19:22:41,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:22:41,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:22:41,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:22:41,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:22:41,489 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:22:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:22:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-02 19:22:41,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:22:41,752 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:22:41,753 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 182 with the following transitions: [2019-10-02 19:22:41,753 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [101], [103], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:22:41,758 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:22:41,758 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:22:44,373 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:23:22,878 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:23:22,879 INFO L272 AbstractInterpreter]: Visited 95 different actions 184 times. Merged at 4 different actions 4 times. Never widened. Performed 380 root evaluator evaluations with a maximum evaluation depth of 16. Performed 380 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:23:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:23:22,880 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:23:48,976 INFO L227 lantSequenceWeakener]: Weakened 178 states. On average, predicates are now at 72.78% of their original sizes. [2019-10-02 19:23:48,977 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:23:49,047 INFO L420 sIntCurrentIteration]: We unified 180 AI predicates to 180 [2019-10-02 19:23:49,048 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:23:49,048 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:23:49,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2019-10-02 19:23:49,048 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:23:49,049 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:23:49,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:23:49,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:23:49,050 INFO L87 Difference]: Start difference. First operand 437 states and 585 transitions. Second operand 10 states. [2019-10-02 19:30:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:30:06,595 INFO L93 Difference]: Finished difference Result 584 states and 744 transitions. [2019-10-02 19:30:06,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 19:30:06,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 181 [2019-10-02 19:30:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:30:06,600 INFO L225 Difference]: With dead ends: 584 [2019-10-02 19:30:06,600 INFO L226 Difference]: Without dead ends: 584 [2019-10-02 19:30:06,601 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 19:30:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-02 19:30:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2019-10-02 19:30:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-10-02 19:30:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 742 transitions. [2019-10-02 19:30:06,620 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 742 transitions. Word has length 181 [2019-10-02 19:30:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:30:06,621 INFO L475 AbstractCegarLoop]: Abstraction has 582 states and 742 transitions. [2019-10-02 19:30:06,621 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 19:30:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 742 transitions. [2019-10-02 19:30:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-02 19:30:06,625 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:30:06,626 INFO L411 BasicCegarLoop]: trace histogram [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, 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] [2019-10-02 19:30:06,626 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:30:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:30:06,626 INFO L82 PathProgramCache]: Analyzing trace with hash -490572161, now seen corresponding path program 1 times [2019-10-02 19:30:06,626 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:30:06,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:30:06,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:30:06,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:30:06,628 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:30:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:30:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 19:30:06,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:30:06,872 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:30:06,872 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 191 with the following transitions: [2019-10-02 19:30:06,875 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [101], [103], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:30:06,892 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:30:06,893 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:30:17,198 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:30:36,119 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:30:36,119 INFO L272 AbstractInterpreter]: Visited 95 different actions 183 times. Merged at 3 different actions 3 times. Never widened. Performed 318 root evaluator evaluations with a maximum evaluation depth of 16. Performed 318 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:30:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:30:36,120 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:30:57,172 INFO L227 lantSequenceWeakener]: Weakened 187 states. On average, predicates are now at 72.78% of their original sizes. [2019-10-02 19:30:57,172 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:30:57,261 INFO L420 sIntCurrentIteration]: We unified 189 AI predicates to 189 [2019-10-02 19:30:57,261 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:30:57,262 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:30:57,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 19:30:57,262 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:30:57,263 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 19:30:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 19:30:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 19:30:57,264 INFO L87 Difference]: Start difference. First operand 582 states and 742 transitions. Second operand 11 states.