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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:04:38,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:04:38,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:04:38,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:04:38,162 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 19:04:38,178 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:04:38,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:04:38,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:04:38,179 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:04:38,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:04:38,180 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:04:38,180 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:04:38,180 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:04:38,180 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:04:38,180 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:04:38,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:04:38,181 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:04:38,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:04:38,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:04:38,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:04:38,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:04:38,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:04:38,182 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:04:38,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:04:38,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:04:38,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:04:38,183 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:04:38,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:04:38,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:04:38,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:04:38,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:04:38,184 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:04:38,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:04:38,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:04:38,185 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:04:38,221 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:04:38,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:04:38,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:04:38,243 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:04:38,244 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:04:38,245 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label37.c [2019-10-02 19:04:38,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cce1a5d2e/c86ddf5be7cf4255bf96348042018da7/FLAGa0d142170 [2019-10-02 19:04:38,858 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:04:38,859 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label37.c [2019-10-02 19:04:38,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cce1a5d2e/c86ddf5be7cf4255bf96348042018da7/FLAGa0d142170 [2019-10-02 19:04:39,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cce1a5d2e/c86ddf5be7cf4255bf96348042018da7 [2019-10-02 19:04:39,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:04:39,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:04:39,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:04:39,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:04:39,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:04:39,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:04:39" (1/1) ... [2019-10-02 19:04:39,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa6530f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39, skipping insertion in model container [2019-10-02 19:04:39,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:04:39" (1/1) ... [2019-10-02 19:04:39,170 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:04:39,223 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:04:39,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:04:39,788 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:04:39,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:04:39,893 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:04:39,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39 WrapperNode [2019-10-02 19:04:39,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:04:39,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:04:39,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:04:39,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:04:39,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39" (1/1) ... [2019-10-02 19:04:39,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39" (1/1) ... [2019-10-02 19:04:39,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39" (1/1) ... [2019-10-02 19:04:39,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39" (1/1) ... [2019-10-02 19:04:39,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39" (1/1) ... [2019-10-02 19:04:39,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39" (1/1) ... [2019-10-02 19:04:39,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39" (1/1) ... [2019-10-02 19:04:39,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:04:39,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:04:39,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:04:39,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:04:39,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39" (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 19:04:40,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:04:40,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:04:40,069 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:04:40,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:04:40,069 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:04:40,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:04:40,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:04:40,071 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:04:40,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:04:40,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:04:40,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:04:41,338 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:04:41,338 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:04:41,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:04:41 BoogieIcfgContainer [2019-10-02 19:04:41,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:04:41,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:04:41,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:04:41,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:04:41,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:04:39" (1/3) ... [2019-10-02 19:04:41,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcb85dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:04:41, skipping insertion in model container [2019-10-02 19:04:41,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:04:39" (2/3) ... [2019-10-02 19:04:41,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bcb85dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:04:41, skipping insertion in model container [2019-10-02 19:04:41,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:04:41" (3/3) ... [2019-10-02 19:04:41,348 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label37.c [2019-10-02 19:04:41,357 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:04:41,365 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:04:41,382 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:04:41,406 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:04:41,407 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:04:41,407 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:04:41,407 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:04:41,407 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:04:41,407 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:04:41,408 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:04:41,408 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:04:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 19:04:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-02 19:04:41,441 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:04:41,442 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:41,444 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:04:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:04:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1887592417, now seen corresponding path program 1 times [2019-10-02 19:04:41,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:04:41,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:41,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:04:41,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:41,506 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:04:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:04:41,847 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 19:04:41,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:04:41,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:04:41,850 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:04:41,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:04:41,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:04:41,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:04:41,876 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-02 19:04:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:04:43,352 INFO L93 Difference]: Finished difference Result 524 states and 762 transitions. [2019-10-02 19:04:43,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:04:43,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2019-10-02 19:04:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:04:43,373 INFO L225 Difference]: With dead ends: 524 [2019-10-02 19:04:43,373 INFO L226 Difference]: Without dead ends: 437 [2019-10-02 19:04:43,375 INFO L640 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 [2019-10-02 19:04:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-02 19:04:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-10-02 19:04:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 19:04:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 426 transitions. [2019-10-02 19:04:43,466 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 426 transitions. Word has length 60 [2019-10-02 19:04:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:04:43,467 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 426 transitions. [2019-10-02 19:04:43,468 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:04:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 426 transitions. [2019-10-02 19:04:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-02 19:04:43,483 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:04:43,483 INFO L411 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, 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] [2019-10-02 19:04:43,484 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:04:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:04:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 597106810, now seen corresponding path program 1 times [2019-10-02 19:04:43,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:04:43,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:43,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:04:43,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:43,489 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:04:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:04:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:04:43,725 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:04:43,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:04:43,725 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:04:43,728 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:04:43,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:04:43,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:04:43,729 INFO L87 Difference]: Start difference. First operand 294 states and 426 transitions. Second operand 6 states. [2019-10-02 19:04:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:04:44,703 INFO L93 Difference]: Finished difference Result 602 states and 886 transitions. [2019-10-02 19:04:44,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:04:44,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-02 19:04:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:04:44,711 INFO L225 Difference]: With dead ends: 602 [2019-10-02 19:04:44,711 INFO L226 Difference]: Without dead ends: 602 [2019-10-02 19:04:44,712 INFO L640 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 [2019-10-02 19:04:44,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2019-10-02 19:04:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2019-10-02 19:04:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-10-02 19:04:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 856 transitions. [2019-10-02 19:04:44,753 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 856 transitions. Word has length 134 [2019-10-02 19:04:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:04:44,753 INFO L475 AbstractCegarLoop]: Abstraction has 590 states and 856 transitions. [2019-10-02 19:04:44,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:04:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 856 transitions. [2019-10-02 19:04:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-02 19:04:44,756 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:04:44,756 INFO L411 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, 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] [2019-10-02 19:04:44,757 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:04:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:04:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1573383766, now seen corresponding path program 1 times [2019-10-02 19:04:44,757 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:04:44,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:44,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:04:44,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:44,759 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:04:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:04:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:04:44,913 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:04:44,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:04:44,914 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:04:44,914 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:04:44,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:04:44,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:04:44,915 INFO L87 Difference]: Start difference. First operand 590 states and 856 transitions. Second operand 6 states. [2019-10-02 19:04:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:04:45,842 INFO L93 Difference]: Finished difference Result 900 states and 1265 transitions. [2019-10-02 19:04:45,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:04:45,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-10-02 19:04:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:04:45,849 INFO L225 Difference]: With dead ends: 900 [2019-10-02 19:04:45,849 INFO L226 Difference]: Without dead ends: 900 [2019-10-02 19:04:45,850 INFO L640 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 [2019-10-02 19:04:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2019-10-02 19:04:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 888. [2019-10-02 19:04:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-10-02 19:04:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1227 transitions. [2019-10-02 19:04:45,890 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1227 transitions. Word has length 136 [2019-10-02 19:04:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:04:45,891 INFO L475 AbstractCegarLoop]: Abstraction has 888 states and 1227 transitions. [2019-10-02 19:04:45,892 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:04:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1227 transitions. [2019-10-02 19:04:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-02 19:04:45,895 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:04:45,895 INFO L411 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, 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] [2019-10-02 19:04:45,896 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:04:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:04:45,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1984546499, now seen corresponding path program 1 times [2019-10-02 19:04:45,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:04:45,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:45,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:04:45,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:45,898 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:04:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:04:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:04:46,081 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:04:46,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:04:46,082 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:04:46,083 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:04:46,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:04:46,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:04:46,083 INFO L87 Difference]: Start difference. First operand 888 states and 1227 transitions. Second operand 4 states. [2019-10-02 19:04:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:04:47,154 INFO L93 Difference]: Finished difference Result 1176 states and 1521 transitions. [2019-10-02 19:04:47,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:04:47,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2019-10-02 19:04:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:04:47,164 INFO L225 Difference]: With dead ends: 1176 [2019-10-02 19:04:47,164 INFO L226 Difference]: Without dead ends: 1176 [2019-10-02 19:04:47,165 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:04:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2019-10-02 19:04:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2019-10-02 19:04:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1176 states. [2019-10-02 19:04:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1521 transitions. [2019-10-02 19:04:47,214 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1521 transitions. Word has length 139 [2019-10-02 19:04:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:04:47,215 INFO L475 AbstractCegarLoop]: Abstraction has 1176 states and 1521 transitions. [2019-10-02 19:04:47,215 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:04:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1521 transitions. [2019-10-02 19:04:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-02 19:04:47,218 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:04:47,219 INFO L411 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, 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] [2019-10-02 19:04:47,219 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:04:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:04:47,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1888530915, now seen corresponding path program 1 times [2019-10-02 19:04:47,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:04:47,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:47,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:04:47,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:47,224 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:04:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:04:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:04:47,345 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:04:47,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:04:47,346 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:04:47,346 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:04:47,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:04:47,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:04:47,347 INFO L87 Difference]: Start difference. First operand 1176 states and 1521 transitions. Second operand 6 states. [2019-10-02 19:04:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:04:48,327 INFO L93 Difference]: Finished difference Result 1675 states and 2159 transitions. [2019-10-02 19:04:48,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:04:48,328 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-10-02 19:04:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:04:48,337 INFO L225 Difference]: With dead ends: 1675 [2019-10-02 19:04:48,337 INFO L226 Difference]: Without dead ends: 1675 [2019-10-02 19:04:48,338 INFO L640 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 [2019-10-02 19:04:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2019-10-02 19:04:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1635. [2019-10-02 19:04:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1635 states. [2019-10-02 19:04:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 2017 transitions. [2019-10-02 19:04:48,396 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 2017 transitions. Word has length 155 [2019-10-02 19:04:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:04:48,397 INFO L475 AbstractCegarLoop]: Abstraction has 1635 states and 2017 transitions. [2019-10-02 19:04:48,397 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:04:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 2017 transitions. [2019-10-02 19:04:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-10-02 19:04:48,403 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:04:48,403 INFO L411 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:04:48,403 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:04:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:04:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1010882157, now seen corresponding path program 1 times [2019-10-02 19:04:48,404 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:04:48,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:48,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:04:48,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:48,406 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:04:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:04:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-10-02 19:04:48,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:04:48,584 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:04:48,585 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 229 with the following transitions: [2019-10-02 19:04:48,588 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [551], [555], [559], [563], [567], [570], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:04:48,636 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:04:48,636 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:05:05,217 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:05:05,219 INFO L272 AbstractInterpreter]: Visited 93 different actions 93 times. Never merged. Never widened. Performed 130 root evaluator evaluations with a maximum evaluation depth of 16. Performed 130 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 19:05:05,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:05:05,223 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:05:26,902 INFO L227 lantSequenceWeakener]: Weakened 219 states. On average, predicates are now at 73.47% of their original sizes. [2019-10-02 19:05:26,902 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:05:26,948 INFO L420 sIntCurrentIteration]: We unified 227 AI predicates to 227 [2019-10-02 19:05:26,948 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:05:26,949 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:05:26,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-10-02 19:05:26,949 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:05:26,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 19:05:26,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 19:05:26,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 19:05:26,951 INFO L87 Difference]: Start difference. First operand 1635 states and 2017 transitions. Second operand 7 states. [2019-10-02 19:05:31,817 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:08:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:08:22,276 INFO L93 Difference]: Finished difference Result 1779 states and 2169 transitions. [2019-10-02 19:08:22,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:08:22,276 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 228 [2019-10-02 19:08:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:08:22,284 INFO L225 Difference]: With dead ends: 1779 [2019-10-02 19:08:22,284 INFO L226 Difference]: Without dead ends: 1779 [2019-10-02 19:08:22,285 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 222 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 19:08:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2019-10-02 19:08:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1778. [2019-10-02 19:08:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1778 states. [2019-10-02 19:08:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2168 transitions. [2019-10-02 19:08:22,326 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2168 transitions. Word has length 228 [2019-10-02 19:08:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:08:22,326 INFO L475 AbstractCegarLoop]: Abstraction has 1778 states and 2168 transitions. [2019-10-02 19:08:22,326 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 19:08:22,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2168 transitions. [2019-10-02 19:08:22,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-10-02 19:08:22,332 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:08:22,333 INFO L411 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:22,333 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:08:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:08:22,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1371500715, now seen corresponding path program 1 times [2019-10-02 19:08:22,334 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:08:22,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:08:22,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:08:22,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:08:22,335 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:08:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:08:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 107 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 19:08:22,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:08:22,559 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:08:22,560 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 261 with the following transitions: [2019-10-02 19:08:22,560 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [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], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [702], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:08:22,567 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:08:22,567 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:08:33,362 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:09:34,658 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:09:34,659 INFO L272 AbstractInterpreter]: Visited 129 different actions 251 times. Merged at 3 different actions 3 times. Never widened. Performed 385 root evaluator evaluations with a maximum evaluation depth of 16. Performed 385 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 19:09:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:09:34,660 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:10:14,606 INFO L227 lantSequenceWeakener]: Weakened 257 states. On average, predicates are now at 73.4% of their original sizes. [2019-10-02 19:10:14,607 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:10:14,706 INFO L420 sIntCurrentIteration]: We unified 259 AI predicates to 259 [2019-10-02 19:10:14,707 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:10:14,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:10:14,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 19:10:14,707 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:10:14,708 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 19:10:14,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 19:10:14,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 19:10:14,709 INFO L87 Difference]: Start difference. First operand 1778 states and 2168 transitions. Second operand 11 states. [2019-10-02 19:13:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:13:25,589 INFO L93 Difference]: Finished difference Result 1945 states and 2336 transitions. [2019-10-02 19:13:25,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 19:13:25,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 260 [2019-10-02 19:13:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:13:25,598 INFO L225 Difference]: With dead ends: 1945 [2019-10-02 19:13:25,599 INFO L226 Difference]: Without dead ends: 1779 [2019-10-02 19:13:25,599 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 19:13:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2019-10-02 19:13:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1778. [2019-10-02 19:13:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1778 states. [2019-10-02 19:13:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2167 transitions. [2019-10-02 19:13:25,638 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2167 transitions. Word has length 260 [2019-10-02 19:13:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:13:25,639 INFO L475 AbstractCegarLoop]: Abstraction has 1778 states and 2167 transitions. [2019-10-02 19:13:25,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 19:13:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2167 transitions. [2019-10-02 19:13:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-10-02 19:13:25,645 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:13:25,646 INFO L411 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:13:25,646 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:13:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:13:25,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1770057567, now seen corresponding path program 1 times [2019-10-02 19:13:25,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:13:25,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:13:25,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:13:25,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:13:25,648 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:13:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:13:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 118 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:13:26,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:13:26,437 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:13:26,437 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 283 with the following transitions: [2019-10-02 19:13:26,438 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [389], [391], [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], [567], [570], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [754], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:13:26,442 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:13:26,442 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:15:30,235 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:15:30,236 INFO L272 AbstractInterpreter]: Visited 142 different actions 278 times. Merged at 4 different actions 4 times. Never widened. Performed 488 root evaluator evaluations with a maximum evaluation depth of 16. Performed 488 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 19:15:30,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:15:30,236 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:16:54,241 INFO L227 lantSequenceWeakener]: Weakened 279 states. On average, predicates are now at 73.35% of their original sizes. [2019-10-02 19:16:54,242 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:16:54,394 INFO L420 sIntCurrentIteration]: We unified 281 AI predicates to 281 [2019-10-02 19:16:54,394 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:16:54,394 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:16:54,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [14] total 27 [2019-10-02 19:16:54,395 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:16:54,395 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-02 19:16:54,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-02 19:16:54,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2019-10-02 19:16:54,396 INFO L87 Difference]: Start difference. First operand 1778 states and 2167 transitions. Second operand 15 states. [2019-10-02 19:17:03,347 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.