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/Problem16_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:21:56,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:21:56,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:21:56,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:21:56,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 20:21:56,843 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:21:56,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:21:56,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:21:56,846 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:21:56,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:21:56,847 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:21:56,847 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:21:56,847 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:21:56,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:21:56,847 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:21:56,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:21:56,849 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:21:56,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:21:56,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:21:56,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:21:56,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:21:56,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:21:56,851 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:21:56,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:21:56,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:21:56,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:21:56,852 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:21:56,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:21:56,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:21:56,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:21:56,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:21:56,853 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:21:56,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:21:56,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:21:56,853 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:21:56,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:21:56,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:21:56,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:21:56,917 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:21:56,918 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:21:56,918 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label35.c [2019-09-09 20:21:56,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91aed6ac/8730b83ffa0d4579b7ccb3fbfd98aaf8/FLAGa86d75be8 [2019-09-09 20:21:57,644 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:21:57,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label35.c [2019-09-09 20:21:57,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91aed6ac/8730b83ffa0d4579b7ccb3fbfd98aaf8/FLAGa86d75be8 [2019-09-09 20:21:57,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91aed6ac/8730b83ffa0d4579b7ccb3fbfd98aaf8 [2019-09-09 20:21:57,872 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:21:57,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:21:57,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:21:57,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:21:57,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:21:57,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:21:57" (1/1) ... [2019-09-09 20:21:57,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@720701ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:57, skipping insertion in model container [2019-09-09 20:21:57,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:21:57" (1/1) ... [2019-09-09 20:21:57,893 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:21:57,980 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:21:58,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:21:58,921 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:21:59,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:21:59,390 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:21:59,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59 WrapperNode [2019-09-09 20:21:59,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:21:59,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:21:59,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:21:59,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:21:59,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59" (1/1) ... [2019-09-09 20:21:59,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59" (1/1) ... [2019-09-09 20:21:59,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59" (1/1) ... [2019-09-09 20:21:59,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59" (1/1) ... [2019-09-09 20:21:59,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59" (1/1) ... [2019-09-09 20:21:59,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59" (1/1) ... [2019-09-09 20:21:59,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59" (1/1) ... [2019-09-09 20:21:59,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:21:59,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:21:59,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:21:59,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:21:59,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:21:59,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:21:59,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:21:59,673 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:21:59,673 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:21:59,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:21:59,673 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:21:59,674 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:21:59,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:21:59,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:21:59,674 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:21:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:21:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:21:59,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:22:02,393 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:22:02,393 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:22:02,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:22:02 BoogieIcfgContainer [2019-09-09 20:22:02,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:22:02,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:22:02,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:22:02,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:22:02,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:21:57" (1/3) ... [2019-09-09 20:22:02,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd75d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:22:02, skipping insertion in model container [2019-09-09 20:22:02,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:21:59" (2/3) ... [2019-09-09 20:22:02,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd75d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:22:02, skipping insertion in model container [2019-09-09 20:22:02,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:22:02" (3/3) ... [2019-09-09 20:22:02,416 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label35.c [2019-09-09 20:22:02,425 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:22:02,433 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:22:02,450 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:22:02,476 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:22:02,476 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:22:02,476 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:22:02,476 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:22:02,476 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:22:02,477 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:22:02,477 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:22:02,477 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:22:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 20:22:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-09 20:22:02,526 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:22:02,527 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:22:02,530 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:22:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:22:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 338381554, now seen corresponding path program 1 times [2019-09-09 20:22:02,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:22:02,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:02,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:22:02,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:02,583 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:22:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:22:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:22:02,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:22:02,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 20:22:02,857 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:22:02,863 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 20:22:02,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 20:22:02,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:22:02,881 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-09-09 20:22:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:22:06,396 INFO L93 Difference]: Finished difference Result 1106 states and 1937 transitions. [2019-09-09 20:22:06,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 20:22:06,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2019-09-09 20:22:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:22:06,429 INFO L225 Difference]: With dead ends: 1106 [2019-09-09 20:22:06,429 INFO L226 Difference]: Without dead ends: 1019 [2019-09-09 20:22:06,431 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 20:22:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-09-09 20:22:06,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 682. [2019-09-09 20:22:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 20:22:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-09-09 20:22:06,530 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 47 [2019-09-09 20:22:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:22:06,530 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-09-09 20:22:06,531 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 20:22:06,531 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-09-09 20:22:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-09 20:22:06,536 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:22:06,537 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:22:06,537 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:22:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:22:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash -8457825, now seen corresponding path program 1 times [2019-09-09 20:22:06,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:22:06,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:06,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:22:06,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:06,540 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:22:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:22:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:22:06,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:22:06,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 20:22:06,749 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:22:06,751 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 20:22:06,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 20:22:06,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 20:22:06,752 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 5 states. [2019-09-09 20:22:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:22:09,731 INFO L93 Difference]: Finished difference Result 1392 states and 2319 transitions. [2019-09-09 20:22:09,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:22:09,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2019-09-09 20:22:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:22:09,750 INFO L225 Difference]: With dead ends: 1392 [2019-09-09 20:22:09,751 INFO L226 Difference]: Without dead ends: 1392 [2019-09-09 20:22:09,752 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 20:22:09,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-09-09 20:22:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1374. [2019-09-09 20:22:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-09-09 20:22:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2277 transitions. [2019-09-09 20:22:09,858 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2277 transitions. Word has length 116 [2019-09-09 20:22:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:22:09,861 INFO L475 AbstractCegarLoop]: Abstraction has 1374 states and 2277 transitions. [2019-09-09 20:22:09,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 20:22:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2277 transitions. [2019-09-09 20:22:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-09 20:22:09,873 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:22:09,874 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:22:09,874 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:22:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:22:09,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1750756938, now seen corresponding path program 1 times [2019-09-09 20:22:09,875 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:22:09,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:09,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:22:09,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:09,878 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:22:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:22:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:22:10,076 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:22:10,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:22:10,076 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:22:10,078 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:22:10,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:22:10,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:22:10,079 INFO L87 Difference]: Start difference. First operand 1374 states and 2277 transitions. Second operand 6 states. [2019-09-09 20:22:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:22:14,668 INFO L93 Difference]: Finished difference Result 2095 states and 3353 transitions. [2019-09-09 20:22:14,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:22:14,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-09-09 20:22:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:22:14,688 INFO L225 Difference]: With dead ends: 2095 [2019-09-09 20:22:14,689 INFO L226 Difference]: Without dead ends: 2095 [2019-09-09 20:22:14,693 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 20:22:14,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2019-09-09 20:22:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2077. [2019-09-09 20:22:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2019-09-09 20:22:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3299 transitions. [2019-09-09 20:22:14,784 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3299 transitions. Word has length 119 [2019-09-09 20:22:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:22:14,785 INFO L475 AbstractCegarLoop]: Abstraction has 2077 states and 3299 transitions. [2019-09-09 20:22:14,786 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:22:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3299 transitions. [2019-09-09 20:22:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-09 20:22:14,788 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:22:14,788 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:22:14,788 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:22:14,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:22:14,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1833499239, now seen corresponding path program 1 times [2019-09-09 20:22:14,789 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:22:14,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:14,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:22:14,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:14,790 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:22:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:22:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:22:14,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:22:14,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:22:14,916 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:22:14,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:22:14,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:22:14,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:22:14,918 INFO L87 Difference]: Start difference. First operand 2077 states and 3299 transitions. Second operand 6 states. [2019-09-09 20:22:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:22:17,357 INFO L93 Difference]: Finished difference Result 3142 states and 4688 transitions. [2019-09-09 20:22:17,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:22:17,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-09-09 20:22:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:22:17,382 INFO L225 Difference]: With dead ends: 3142 [2019-09-09 20:22:17,382 INFO L226 Difference]: Without dead ends: 3142 [2019-09-09 20:22:17,383 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 20:22:17,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2019-09-09 20:22:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 3129. [2019-09-09 20:22:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3129 states. [2019-09-09 20:22:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4641 transitions. [2019-09-09 20:22:17,482 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4641 transitions. Word has length 120 [2019-09-09 20:22:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:22:17,482 INFO L475 AbstractCegarLoop]: Abstraction has 3129 states and 4641 transitions. [2019-09-09 20:22:17,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:22:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4641 transitions. [2019-09-09 20:22:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 20:22:17,485 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:22:17,485 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:22:17,486 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:22:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:22:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2059459070, now seen corresponding path program 1 times [2019-09-09 20:22:17,487 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:22:17,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:17,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:22:17,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:17,488 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:22:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:22:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:22:17,702 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:22:17,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:22:17,703 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:22:17,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:22:17,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:22:17,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:22:17,704 INFO L87 Difference]: Start difference. First operand 3129 states and 4641 transitions. Second operand 6 states. [2019-09-09 20:22:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:22:20,506 INFO L93 Difference]: Finished difference Result 4917 states and 7419 transitions. [2019-09-09 20:22:20,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-09 20:22:20,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-09-09 20:22:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:22:20,531 INFO L225 Difference]: With dead ends: 4917 [2019-09-09 20:22:20,531 INFO L226 Difference]: Without dead ends: 4917 [2019-09-09 20:22:20,531 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-09 20:22:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4917 states. [2019-09-09 20:22:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4917 to 4865. [2019-09-09 20:22:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4865 states. [2019-09-09 20:22:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 7148 transitions. [2019-09-09 20:22:20,666 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 7148 transitions. Word has length 123 [2019-09-09 20:22:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:22:20,667 INFO L475 AbstractCegarLoop]: Abstraction has 4865 states and 7148 transitions. [2019-09-09 20:22:20,667 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:22:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 7148 transitions. [2019-09-09 20:22:20,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-09 20:22:20,669 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:22:20,669 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:22:20,670 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:22:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:22:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1922288270, now seen corresponding path program 1 times [2019-09-09 20:22:20,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:22:20,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:20,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:22:20,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:20,674 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:22:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:22:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:22:20,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:22:20,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:22:20,785 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:22:20,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:22:20,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:22:20,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:22:20,786 INFO L87 Difference]: Start difference. First operand 4865 states and 7148 transitions. Second operand 6 states. [2019-09-09 20:22:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:22:25,222 INFO L93 Difference]: Finished difference Result 7969 states and 10808 transitions. [2019-09-09 20:22:25,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:22:25,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2019-09-09 20:22:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:22:25,264 INFO L225 Difference]: With dead ends: 7969 [2019-09-09 20:22:25,264 INFO L226 Difference]: Without dead ends: 7969 [2019-09-09 20:22:25,265 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 20:22:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7969 states. [2019-09-09 20:22:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7969 to 6578. [2019-09-09 20:22:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6578 states. [2019-09-09 20:22:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6578 states to 6578 states and 9049 transitions. [2019-09-09 20:22:25,418 INFO L78 Accepts]: Start accepts. Automaton has 6578 states and 9049 transitions. Word has length 131 [2019-09-09 20:22:25,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:22:25,419 INFO L475 AbstractCegarLoop]: Abstraction has 6578 states and 9049 transitions. [2019-09-09 20:22:25,419 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:22:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6578 states and 9049 transitions. [2019-09-09 20:22:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-09 20:22:25,421 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:22:25,421 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:22:25,422 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:22:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:22:25,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1219597803, now seen corresponding path program 1 times [2019-09-09 20:22:25,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:22:25,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:25,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:22:25,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:22:25,428 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:22:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:22:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 20:22:25,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:22:25,547 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:22:25,548 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 139 with the following transitions: [2019-09-09 20:22:25,550 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [463], [465], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 20:22:25,598 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:22:25,598 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:22:30,350 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 20:22:32,667 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:22:32,670 INFO L272 AbstractInterpreter]: Visited 98 different actions 191 times. Merged at 4 different actions 5 times. Never widened. Performed 444 root evaluator evaluations with a maximum evaluation depth of 14. Performed 444 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 20:22:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:22:32,674 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:22:34,980 INFO L227 lantSequenceWeakener]: Weakened 135 states. On average, predicates are now at 78.19% of their original sizes. [2019-09-09 20:22:34,980 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:22:35,054 INFO L420 sIntCurrentIteration]: We unified 137 AI predicates to 137 [2019-09-09 20:22:35,054 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:22:35,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:22:35,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [4] total 13 [2019-09-09 20:22:35,055 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:22:35,056 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 20:22:35,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 20:22:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 20:22:35,057 INFO L87 Difference]: Start difference. First operand 6578 states and 9049 transitions. Second operand 11 states.