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/Problem14_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:01:38,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:01:38,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:01:38,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:01:38,653 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 18:01:38,668 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:01:38,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:01:38,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:01:38,669 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:01:38,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:01:38,670 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:01:38,670 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:01:38,670 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:01:38,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:01:38,670 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:01:38,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:01:38,671 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:01:38,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:01:38,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:01:38,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:01:38,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:01:38,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:01:38,672 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:01:38,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:01:38,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:01:38,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:01:38,673 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:01:38,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:01:38,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:01:38,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:01:38,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:01:38,674 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:01:38,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:01:38,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:01:38,675 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:01:38,702 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:01:38,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:01:38,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:01:38,720 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:01:38,720 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:01:38,721 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label10.c [2019-09-09 18:01:38,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae81fe39/9f73945423264ebc80a32eaafb33927e/FLAGd9ef682ac [2019-09-09 18:01:39,345 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:01:39,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label10.c [2019-09-09 18:01:39,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae81fe39/9f73945423264ebc80a32eaafb33927e/FLAGd9ef682ac [2019-09-09 18:01:39,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae81fe39/9f73945423264ebc80a32eaafb33927e [2019-09-09 18:01:39,584 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:01:39,585 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:01:39,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:01:39,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:01:39,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:01:39,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:01:39" (1/1) ... [2019-09-09 18:01:39,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63888b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:39, skipping insertion in model container [2019-09-09 18:01:39,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:01:39" (1/1) ... [2019-09-09 18:01:39,602 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:01:39,660 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:01:40,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:01:40,217 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:01:40,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:01:40,370 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:01:40,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40 WrapperNode [2019-09-09 18:01:40,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:01:40,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:01:40,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:01:40,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:01:40,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40" (1/1) ... [2019-09-09 18:01:40,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40" (1/1) ... [2019-09-09 18:01:40,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40" (1/1) ... [2019-09-09 18:01:40,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40" (1/1) ... [2019-09-09 18:01:40,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40" (1/1) ... [2019-09-09 18:01:40,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40" (1/1) ... [2019-09-09 18:01:40,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40" (1/1) ... [2019-09-09 18:01:40,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:01:40,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:01:40,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:01:40,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:01:40,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40" (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 18:01:40,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:01:40,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:01:40,561 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:01:40,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:01:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:01:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:01:40,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:01:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:01:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:01:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:01:40,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:01:41,921 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:01:41,921 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:01:41,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:01:41 BoogieIcfgContainer [2019-09-09 18:01:41,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:01:41,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:01:41,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:01:41,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:01:41,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:01:39" (1/3) ... [2019-09-09 18:01:41,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6a09da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:01:41, skipping insertion in model container [2019-09-09 18:01:41,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:40" (2/3) ... [2019-09-09 18:01:41,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a6a09da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:01:41, skipping insertion in model container [2019-09-09 18:01:41,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:01:41" (3/3) ... [2019-09-09 18:01:41,931 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label10.c [2019-09-09 18:01:41,940 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:01:41,948 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:01:41,965 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:01:41,991 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:01:41,991 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:01:41,991 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:01:41,991 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:01:41,992 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:01:41,992 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:01:41,992 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:01:41,992 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:01:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:01:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-09 18:01:42,027 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:01:42,028 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] [2019-09-09 18:01:42,030 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:01:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:01:42,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1708821435, now seen corresponding path program 1 times [2019-09-09 18:01:42,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:01:42,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:42,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:01:42,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:42,078 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:01:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:01:42,305 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 18:01:42,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:01:42,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:01:42,309 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:01:42,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:01:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:01:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:01:42,334 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-09-09 18:01:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:01:44,146 INFO L93 Difference]: Finished difference Result 642 states and 895 transitions. [2019-09-09 18:01:44,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:01:44,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-09 18:01:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:01:44,169 INFO L225 Difference]: With dead ends: 642 [2019-09-09 18:01:44,169 INFO L226 Difference]: Without dead ends: 554 [2019-09-09 18:01:44,171 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 18:01:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-09-09 18:01:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-09-09 18:01:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-09-09 18:01:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 776 transitions. [2019-09-09 18:01:44,260 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 776 transitions. Word has length 34 [2019-09-09 18:01:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:01:44,260 INFO L475 AbstractCegarLoop]: Abstraction has 554 states and 776 transitions. [2019-09-09 18:01:44,260 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:01:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 776 transitions. [2019-09-09 18:01:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-09 18:01:44,268 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:01:44,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:44,269 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:01:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:01:44,270 INFO L82 PathProgramCache]: Analyzing trace with hash 491390794, now seen corresponding path program 1 times [2019-09-09 18:01:44,270 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:01:44,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:44,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:01:44,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:44,272 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:01:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:01:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:01:44,477 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:01:44,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:01:44,477 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:01:44,482 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:01:44,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:01:44,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:01:44,483 INFO L87 Difference]: Start difference. First operand 554 states and 776 transitions. Second operand 4 states. [2019-09-09 18:01:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:01:46,132 INFO L93 Difference]: Finished difference Result 1646 states and 2199 transitions. [2019-09-09 18:01:46,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:01:46,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2019-09-09 18:01:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:01:46,142 INFO L225 Difference]: With dead ends: 1646 [2019-09-09 18:01:46,142 INFO L226 Difference]: Without dead ends: 1646 [2019-09-09 18:01:46,143 INFO L628 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 [2019-09-09 18:01:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-09-09 18:01:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-09-09 18:01:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-09-09 18:01:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2199 transitions. [2019-09-09 18:01:46,212 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2199 transitions. Word has length 146 [2019-09-09 18:01:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:01:46,213 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2199 transitions. [2019-09-09 18:01:46,213 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:01:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2199 transitions. [2019-09-09 18:01:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-09-09 18:01:46,226 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:01:46,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:46,227 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:01:46,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:01:46,228 INFO L82 PathProgramCache]: Analyzing trace with hash -404806138, now seen corresponding path program 1 times [2019-09-09 18:01:46,229 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:01:46,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:46,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:01:46,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:46,230 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:01:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:01:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:01:46,408 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:01:46,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:01:46,409 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:01:46,409 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:01:46,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:01:46,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:01:46,410 INFO L87 Difference]: Start difference. First operand 1646 states and 2199 transitions. Second operand 4 states. [2019-09-09 18:01:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:01:47,804 INFO L93 Difference]: Finished difference Result 3466 states and 4759 transitions. [2019-09-09 18:01:47,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:01:47,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2019-09-09 18:01:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:01:47,840 INFO L225 Difference]: With dead ends: 3466 [2019-09-09 18:01:47,841 INFO L226 Difference]: Without dead ends: 3466 [2019-09-09 18:01:47,842 INFO L628 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 [2019-09-09 18:01:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2019-09-09 18:01:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 3466. [2019-09-09 18:01:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3466 states. [2019-09-09 18:01:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 4759 transitions. [2019-09-09 18:01:48,039 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 4759 transitions. Word has length 164 [2019-09-09 18:01:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:01:48,048 INFO L475 AbstractCegarLoop]: Abstraction has 3466 states and 4759 transitions. [2019-09-09 18:01:48,048 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:01:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 4759 transitions. [2019-09-09 18:01:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-09-09 18:01:48,069 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:01:48,070 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:01:48,070 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:01:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:01:48,071 INFO L82 PathProgramCache]: Analyzing trace with hash -672442673, now seen corresponding path program 1 times [2019-09-09 18:01:48,071 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:01:48,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:48,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:01:48,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:48,073 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:01:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:01:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:01:48,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:01:48,556 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:01:48,560 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 271 with the following transitions: [2019-09-09 18:01:48,564 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], [181], [183], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:01:48,633 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:01:48,634 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:02:07,125 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:02:07,127 INFO L272 AbstractInterpreter]: Visited 158 different actions 158 times. Never merged. Never widened. Performed 355 root evaluator evaluations with a maximum evaluation depth of 14. Performed 355 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:02:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:02:07,131 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:02:21,782 INFO L227 lantSequenceWeakener]: Weakened 251 states. On average, predicates are now at 77.68% of their original sizes. [2019-09-09 18:02:21,783 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:02:21,901 INFO L420 sIntCurrentIteration]: We unified 269 AI predicates to 269 [2019-09-09 18:02:21,901 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:02:21,902 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:02:21,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 18:02:21,903 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:02:21,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 18:02:21,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 18:02:21,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-09-09 18:02:21,906 INFO L87 Difference]: Start difference. First operand 3466 states and 4759 transitions. Second operand 12 states. [2019-09-09 18:04:18,827 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:06:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:06:07,747 INFO L93 Difference]: Finished difference Result 3470 states and 4728 transitions. [2019-09-09 18:06:07,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-09 18:06:07,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 270 [2019-09-09 18:06:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:06:07,766 INFO L225 Difference]: With dead ends: 3470 [2019-09-09 18:06:07,766 INFO L226 Difference]: Without dead ends: 3470 [2019-09-09 18:06:07,767 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:06:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2019-09-09 18:06:07,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 3466. [2019-09-09 18:06:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3466 states. [2019-09-09 18:06:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 4721 transitions. [2019-09-09 18:06:07,858 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 4721 transitions. Word has length 270 [2019-09-09 18:06:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:06:07,859 INFO L475 AbstractCegarLoop]: Abstraction has 3466 states and 4721 transitions. [2019-09-09 18:06:07,859 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-09 18:06:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 4721 transitions. [2019-09-09 18:06:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-09-09 18:06:07,869 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:06:07,870 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:06:07,870 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:06:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:06:07,871 INFO L82 PathProgramCache]: Analyzing trace with hash 943674838, now seen corresponding path program 1 times [2019-09-09 18:06:07,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:06:07,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:06:07,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:06:07,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:06:07,872 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:06:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:06:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 166 proven. 161 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:06:08,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:06:08,507 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:06:08,507 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 355 with the following transitions: [2019-09-09 18:06:08,508 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], [181], [183], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [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], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:06:08,514 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:06:08,515 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:06:32,479 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:06:32,481 INFO L272 AbstractInterpreter]: Visited 162 different actions 319 times. Merged at 4 different actions 5 times. Never widened. Performed 608 root evaluator evaluations with a maximum evaluation depth of 14. Performed 608 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 18:06:32,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:06:32,481 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:06:39,625 INFO L227 lantSequenceWeakener]: Weakened 351 states. On average, predicates are now at 77.5% of their original sizes. [2019-09-09 18:06:39,625 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:06:39,746 INFO L420 sIntCurrentIteration]: We unified 353 AI predicates to 353 [2019-09-09 18:06:39,746 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:06:39,746 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:06:39,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2019-09-09 18:06:39,747 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:06:39,748 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 18:06:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 18:06:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 18:06:39,748 INFO L87 Difference]: Start difference. First operand 3466 states and 4721 transitions. Second operand 12 states. [2019-09-09 18:07:18,250 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:07:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:07:45,743 INFO L93 Difference]: Finished difference Result 3682 states and 4937 transitions. [2019-09-09 18:07:45,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:07:45,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 354 [2019-09-09 18:07:45,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:07:45,759 INFO L225 Difference]: With dead ends: 3682 [2019-09-09 18:07:45,759 INFO L226 Difference]: Without dead ends: 3467 [2019-09-09 18:07:45,759 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-09-09 18:07:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2019-09-09 18:07:45,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 3466. [2019-09-09 18:07:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3466 states. [2019-09-09 18:07:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 4715 transitions. [2019-09-09 18:07:45,850 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 4715 transitions. Word has length 354 [2019-09-09 18:07:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:07:45,850 INFO L475 AbstractCegarLoop]: Abstraction has 3466 states and 4715 transitions. [2019-09-09 18:07:45,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-09 18:07:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 4715 transitions. [2019-09-09 18:07:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2019-09-09 18:07:45,861 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:07:45,862 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:45,862 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:07:45,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:07:45,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1265607170, now seen corresponding path program 1 times [2019-09-09 18:07:45,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:07:45,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:07:45,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:07:45,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:07:45,864 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:07:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:07:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 138 proven. 166 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-09-09 18:07:46,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:07:46,381 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:07:46,385 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 381 with the following transitions: [2019-09-09 18:07:46,386 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], [181], [183], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [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], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:07:46,395 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:07:46,395 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:08:19,687 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:08:19,688 INFO L272 AbstractInterpreter]: Visited 162 different actions 319 times. Merged at 4 different actions 5 times. Never widened. Performed 729 root evaluator evaluations with a maximum evaluation depth of 14. Performed 729 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 18:08:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:08:19,688 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:08:37,868 INFO L227 lantSequenceWeakener]: Weakened 377 states. On average, predicates are now at 77.48% of their original sizes. [2019-09-09 18:08:37,868 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:08:37,986 INFO L420 sIntCurrentIteration]: We unified 379 AI predicates to 379 [2019-09-09 18:08:37,987 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:08:37,987 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:08:37,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2019-09-09 18:08:37,987 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:08:37,988 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-09 18:08:37,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-09 18:08:37,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-09-09 18:08:37,988 INFO L87 Difference]: Start difference. First operand 3466 states and 4715 transitions. Second operand 13 states. [2019-09-09 18:09:28,593 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:11:40,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:11:40,419 INFO L93 Difference]: Finished difference Result 3652 states and 4908 transitions. [2019-09-09 18:11:40,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-09 18:11:40,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 380 [2019-09-09 18:11:40,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:11:40,434 INFO L225 Difference]: With dead ends: 3652 [2019-09-09 18:11:40,434 INFO L226 Difference]: Without dead ends: 3652 [2019-09-09 18:11:40,435 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2019-09-09 18:11:40,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2019-09-09 18:11:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 3650. [2019-09-09 18:11:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3650 states. [2019-09-09 18:11:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 4906 transitions. [2019-09-09 18:11:40,528 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 4906 transitions. Word has length 380 [2019-09-09 18:11:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:11:40,528 INFO L475 AbstractCegarLoop]: Abstraction has 3650 states and 4906 transitions. [2019-09-09 18:11:40,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-09 18:11:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 4906 transitions. [2019-09-09 18:11:40,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2019-09-09 18:11:40,539 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:11:40,539 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:11:40,540 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:11:40,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:11:40,540 INFO L82 PathProgramCache]: Analyzing trace with hash -66287658, now seen corresponding path program 1 times [2019-09-09 18:11:40,540 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:11:40,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:11:40,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:11:40,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:11:40,542 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:11:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:11:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 217 proven. 124 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 18:11:41,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:11:41,029 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:11:41,029 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 407 with the following transitions: [2019-09-09 18:11:41,029 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], [181], [183], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:11:41,033 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:11:41,033 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:12:03,513 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:13:34,982 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:13:34,983 INFO L272 AbstractInterpreter]: Visited 162 different actions 952 times. Merged at 6 different actions 30 times. Widened at 1 different actions 1 times. Performed 1847 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1847 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:13:34,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:13:34,983 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:13:49,352 INFO L227 lantSequenceWeakener]: Weakened 403 states. On average, predicates are now at 77.46% of their original sizes. [2019-09-09 18:13:49,352 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:13:49,418 INFO L420 sIntCurrentIteration]: We unified 405 AI predicates to 405 [2019-09-09 18:13:49,418 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:13:49,419 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:13:49,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:13:49,419 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:13:49,420 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:13:49,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:13:49,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:13:49,420 INFO L87 Difference]: Start difference. First operand 3650 states and 4906 transitions. Second operand 10 states. [2019-09-09 18:15:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:15:46,785 INFO L93 Difference]: Finished difference Result 4026 states and 5285 transitions. [2019-09-09 18:15:46,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-09 18:15:46,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 406 [2019-09-09 18:15:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:15:46,806 INFO L225 Difference]: With dead ends: 4026 [2019-09-09 18:15:46,806 INFO L226 Difference]: Without dead ends: 4026 [2019-09-09 18:15:46,806 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:15:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2019-09-09 18:15:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 4020. [2019-09-09 18:15:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4020 states. [2019-09-09 18:15:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 5279 transitions. [2019-09-09 18:15:46,885 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 5279 transitions. Word has length 406 [2019-09-09 18:15:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:15:46,885 INFO L475 AbstractCegarLoop]: Abstraction has 4020 states and 5279 transitions. [2019-09-09 18:15:46,886 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:15:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 5279 transitions. [2019-09-09 18:15:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2019-09-09 18:15:46,904 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:15:46,905 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:15:46,905 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:15:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:15:46,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1911623454, now seen corresponding path program 1 times [2019-09-09 18:15:46,906 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:15:46,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:46,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:15:46,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:15:46,908 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:15:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:15:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 214 proven. 423 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:15:47,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:15:47,737 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:15:47,737 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 468 with the following transitions: [2019-09-09 18:15:47,737 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], [181], [183], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [830], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:15:47,740 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:15:47,740 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)