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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:43:51,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:43:51,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:43:51,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:43:51,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:43:51,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:43:51,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:43:51,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:43:51,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:43:51,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:43:51,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:43:51,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:43:51,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:43:51,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:43:51,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:43:51,316 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 18:43:51,347 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:43:51,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:43:51,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:43:51,348 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:43:51,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:43:51,349 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:43:51,350 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:43:51,350 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:43:51,350 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:43:51,350 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:43:51,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:43:51,352 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:43:51,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:43:51,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:43:51,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:43:51,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:43:51,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:43:51,353 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:43:51,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:43:51,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:43:51,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:43:51,355 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:43:51,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:43:51,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:43:51,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:43:51,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:43:51,356 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:43:51,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:43:51,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:43:51,357 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:43:51,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:43:51,412 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:43:51,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:43:51,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:43:51,419 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:43:51,420 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-09-09 18:43:51,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2158741d9/15d030b3faef48e1af24a8f6815940f3/FLAG7295f7279 [2019-09-09 18:43:52,065 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:43:52,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label57.c [2019-09-09 18:43:52,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2158741d9/15d030b3faef48e1af24a8f6815940f3/FLAG7295f7279 [2019-09-09 18:43:52,306 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2158741d9/15d030b3faef48e1af24a8f6815940f3 [2019-09-09 18:43:52,315 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:43:52,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:43:52,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:43:52,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:43:52,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:43:52,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:43:52" (1/1) ... [2019-09-09 18:43:52,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c68dd03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:52, skipping insertion in model container [2019-09-09 18:43:52,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:43:52" (1/1) ... [2019-09-09 18:43:52,334 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:43:52,394 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:43:53,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:43:53,038 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:43:53,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:43:53,229 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:43:53,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53 WrapperNode [2019-09-09 18:43:53,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:43:53,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:43:53,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:43:53,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:43:53,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53" (1/1) ... [2019-09-09 18:43:53,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53" (1/1) ... [2019-09-09 18:43:53,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53" (1/1) ... [2019-09-09 18:43:53,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53" (1/1) ... [2019-09-09 18:43:53,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53" (1/1) ... [2019-09-09 18:43:53,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53" (1/1) ... [2019-09-09 18:43:53,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53" (1/1) ... [2019-09-09 18:43:53,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:43:53,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:43:53,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:43:53,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:43:53,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53" (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 18:43:53,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:43:53,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:43:53,449 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:43:53,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:43:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:43:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:43:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:43:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:43:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:43:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:43:53,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:43:54,980 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:43:54,981 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:43:54,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:43:54 BoogieIcfgContainer [2019-09-09 18:43:54,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:43:54,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:43:54,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:43:54,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:43:54,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:43:52" (1/3) ... [2019-09-09 18:43:54,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4ce3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:43:54, skipping insertion in model container [2019-09-09 18:43:54,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:43:53" (2/3) ... [2019-09-09 18:43:54,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4ce3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:43:54, skipping insertion in model container [2019-09-09 18:43:54,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:43:54" (3/3) ... [2019-09-09 18:43:54,992 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label57.c [2019-09-09 18:43:55,002 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:43:55,011 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:43:55,028 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:43:55,056 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:43:55,057 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:43:55,057 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:43:55,057 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:43:55,057 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:43:55,057 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:43:55,058 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:43:55,058 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:43:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:43:55,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-09 18:43:55,094 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:43:55,095 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] [2019-09-09 18:43:55,097 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:43:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:43:55,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1500027043, now seen corresponding path program 1 times [2019-09-09 18:43:55,106 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:43:55,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:55,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:43:55,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:55,158 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:43:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:43:55,394 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 18:43:55,396 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:43:55,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:43:55,397 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:43:55,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:43:55,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:43:55,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:43:55,422 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-09-09 18:43:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:43:56,704 INFO L93 Difference]: Finished difference Result 440 states and 711 transitions. [2019-09-09 18:43:56,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:43:56,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2019-09-09 18:43:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:43:56,730 INFO L225 Difference]: With dead ends: 440 [2019-09-09 18:43:56,730 INFO L226 Difference]: Without dead ends: 372 [2019-09-09 18:43:56,733 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:43:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-09-09 18:43:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-09-09 18:43:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:43:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-09-09 18:43:56,807 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 36 [2019-09-09 18:43:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:43:56,808 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-09-09 18:43:56,808 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:43:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-09-09 18:43:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-09 18:43:56,813 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:43:56,814 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:43:56,814 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:43:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:43:56,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1488834266, now seen corresponding path program 1 times [2019-09-09 18:43:56,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:43:56,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:56,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:43:56,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:56,817 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:43:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:43:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:43:57,063 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:43:57,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:43:57,063 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:43:57,065 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:43:57,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:43:57,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:43:57,066 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-09-09 18:43:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:43:58,380 INFO L93 Difference]: Finished difference Result 570 states and 828 transitions. [2019-09-09 18:43:58,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 18:43:58,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-09-09 18:43:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:43:58,386 INFO L225 Difference]: With dead ends: 570 [2019-09-09 18:43:58,386 INFO L226 Difference]: Without dead ends: 570 [2019-09-09 18:43:58,387 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 18:43:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-09-09 18:43:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-09-09 18:43:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-09-09 18:43:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-09-09 18:43:58,427 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 122 [2019-09-09 18:43:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:43:58,428 INFO L475 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-09-09 18:43:58,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:43:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-09-09 18:43:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-09 18:43:58,431 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:43:58,431 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:43:58,431 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:43:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:43:58,432 INFO L82 PathProgramCache]: Analyzing trace with hash -753448615, now seen corresponding path program 1 times [2019-09-09 18:43:58,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:43:58,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:58,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:43:58,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:43:58,434 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:43:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:43:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:43:58,584 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:43:58,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:43:58,585 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:43:58,586 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:43:58,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:43:58,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:43:58,588 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-09-09 18:44:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:44:00,237 INFO L93 Difference]: Finished difference Result 1664 states and 2287 transitions. [2019-09-09 18:44:00,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:44:00,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2019-09-09 18:44:00,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:44:00,249 INFO L225 Difference]: With dead ends: 1664 [2019-09-09 18:44:00,249 INFO L226 Difference]: Without dead ends: 1664 [2019-09-09 18:44:00,250 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 18:44:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-09-09 18:44:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1664. [2019-09-09 18:44:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2019-09-09 18:44:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2287 transitions. [2019-09-09 18:44:00,313 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2287 transitions. Word has length 131 [2019-09-09 18:44:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:44:00,314 INFO L475 AbstractCegarLoop]: Abstraction has 1664 states and 2287 transitions. [2019-09-09 18:44:00,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:44:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2287 transitions. [2019-09-09 18:44:00,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-09-09 18:44:00,324 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:44:00,325 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 18:44:00,325 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:44:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:44:00,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1175360854, now seen corresponding path program 1 times [2019-09-09 18:44:00,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:44:00,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:00,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:44:00,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:44:00,327 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:44:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:44:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:44:00,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:44:00,630 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:44:00,631 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2019-09-09 18:44:00,634 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [197], [199], [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], [655], [659], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:44:00,718 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:44:00,719 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:44:10,448 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:44:10,450 INFO L272 AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Performed 273 root evaluator evaluations with a maximum evaluation depth of 13. Performed 273 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:44:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:44:10,454 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:44:22,906 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 77.73% of their original sizes. [2019-09-09 18:44:22,906 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:44:23,002 INFO L420 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2019-09-09 18:44:23,002 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:44:23,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:44:23,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:44:23,004 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:44:23,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:44:23,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:44:23,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:44:23,005 INFO L87 Difference]: Start difference. First operand 1664 states and 2287 transitions. Second operand 11 states. [2019-09-09 18:45:59,745 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:46:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:46:57,497 INFO L93 Difference]: Finished difference Result 1850 states and 2484 transitions. [2019-09-09 18:46:57,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-09 18:46:57,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 259 [2019-09-09 18:46:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:46:57,507 INFO L225 Difference]: With dead ends: 1850 [2019-09-09 18:46:57,507 INFO L226 Difference]: Without dead ends: 1850 [2019-09-09 18:46:57,508 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-09-09 18:46:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-09-09 18:46:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1846. [2019-09-09 18:46:57,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1846 states. [2019-09-09 18:46:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2477 transitions. [2019-09-09 18:46:57,560 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2477 transitions. Word has length 259 [2019-09-09 18:46:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:46:57,561 INFO L475 AbstractCegarLoop]: Abstraction has 1846 states and 2477 transitions. [2019-09-09 18:46:57,561 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:46:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2477 transitions. [2019-09-09 18:46:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-09-09 18:46:57,569 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:46:57,569 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, 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, 2, 2, 2, 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] [2019-09-09 18:46:57,570 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:46:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:46:57,570 INFO L82 PathProgramCache]: Analyzing trace with hash -518867421, now seen corresponding path program 1 times [2019-09-09 18:46:57,571 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:46:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:46:57,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:46:57,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:46:57,572 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:46:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:46:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 173 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:46:58,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:46:58,260 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:46:58,260 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 344 with the following transitions: [2019-09-09 18:46:58,260 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [197], [199], [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], [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], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:46:58,266 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:46:58,266 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:47:10,099 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:47:10,101 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:47:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:47:10,101 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:47:15,755 INFO L227 lantSequenceWeakener]: Weakened 340 states. On average, predicates are now at 77.53% of their original sizes. [2019-09-09 18:47:15,755 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:47:15,836 INFO L420 sIntCurrentIteration]: We unified 342 AI predicates to 342 [2019-09-09 18:47:15,836 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:47:15,836 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:47:15,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:47:15,837 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:47:15,837 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:47:15,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:47:15,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:47:15,838 INFO L87 Difference]: Start difference. First operand 1846 states and 2477 transitions. Second operand 11 states. [2019-09-09 18:47:48,818 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:48:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:48:15,873 INFO L93 Difference]: Finished difference Result 2062 states and 2693 transitions. [2019-09-09 18:48:15,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:48:15,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 343 [2019-09-09 18:48:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:48:15,883 INFO L225 Difference]: With dead ends: 2062 [2019-09-09 18:48:15,883 INFO L226 Difference]: Without dead ends: 1847 [2019-09-09 18:48:15,884 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:48:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2019-09-09 18:48:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1846. [2019-09-09 18:48:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1846 states. [2019-09-09 18:48:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 2471 transitions. [2019-09-09 18:48:15,934 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 2471 transitions. Word has length 343 [2019-09-09 18:48:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:48:15,935 INFO L475 AbstractCegarLoop]: Abstraction has 1846 states and 2471 transitions. [2019-09-09 18:48:15,935 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:48:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 2471 transitions. [2019-09-09 18:48:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2019-09-09 18:48:15,943 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:48:15,943 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:48:15,944 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:48:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:48:15,944 INFO L82 PathProgramCache]: Analyzing trace with hash 966485367, now seen corresponding path program 1 times [2019-09-09 18:48:15,944 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:48:15,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:48:15,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:48:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:48:15,946 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:48:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:48:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 98 proven. 316 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:48:16,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:48:16,873 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:48:16,873 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 370 with the following transitions: [2019-09-09 18:48:16,873 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [197], [199], [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], [655], [658], [659], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:48:16,877 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:48:16,878 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:48:31,580 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:48:31,580 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 565 root evaluator evaluations with a maximum evaluation depth of 13. Performed 565 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:48:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:48:31,581 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:48:46,573 INFO L227 lantSequenceWeakener]: Weakened 366 states. On average, predicates are now at 77.51% of their original sizes. [2019-09-09 18:48:46,573 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:48:46,655 INFO L420 sIntCurrentIteration]: We unified 368 AI predicates to 368 [2019-09-09 18:48:46,655 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:48:46,655 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:48:46,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2019-09-09 18:48:46,655 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:48:46,656 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:48:46,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:48:46,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:48:46,657 INFO L87 Difference]: Start difference. First operand 1846 states and 2471 transitions. Second operand 11 states. [2019-09-09 18:49:27,157 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:50:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:50:37,282 INFO L93 Difference]: Finished difference Result 2032 states and 2671 transitions. [2019-09-09 18:50:37,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:50:37,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 369 [2019-09-09 18:50:37,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:50:37,291 INFO L225 Difference]: With dead ends: 2032 [2019-09-09 18:50:37,292 INFO L226 Difference]: Without dead ends: 2032 [2019-09-09 18:50:37,292 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:50:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-09-09 18:50:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2030. [2019-09-09 18:50:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2030 states. [2019-09-09 18:50:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2669 transitions. [2019-09-09 18:50:37,340 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2669 transitions. Word has length 369 [2019-09-09 18:50:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:50:37,340 INFO L475 AbstractCegarLoop]: Abstraction has 2030 states and 2669 transitions. [2019-09-09 18:50:37,341 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:50:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2669 transitions. [2019-09-09 18:50:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2019-09-09 18:50:37,352 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:50:37,352 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, 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, 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] [2019-09-09 18:50:37,352 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:50:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:50:37,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1434411120, now seen corresponding path program 1 times [2019-09-09 18:50:37,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:50:37,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:50:37,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:50:37,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:50:37,354 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:50:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:50:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 206 proven. 166 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-09-09 18:50:37,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:50:37,634 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:50:37,635 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 454 with the following transitions: [2019-09-09 18:50:37,635 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [197], [199], [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], [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], [658], [659], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:50:37,639 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:50:37,639 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:50:52,624 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:50:52,625 INFO L272 AbstractInterpreter]: Visited 122 different actions 363 times. Merged at 6 different actions 17 times. Never widened. Performed 661 root evaluator evaluations with a maximum evaluation depth of 13. Performed 661 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2019-09-09 18:50:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:50:52,625 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:50:59,326 INFO L227 lantSequenceWeakener]: Weakened 450 states. On average, predicates are now at 77.48% of their original sizes. [2019-09-09 18:50:59,327 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:50:59,396 INFO L420 sIntCurrentIteration]: We unified 452 AI predicates to 452 [2019-09-09 18:50:59,397 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:50:59,397 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:50:59,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:50:59,397 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:50:59,398 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:50:59,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:50:59,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:50:59,399 INFO L87 Difference]: Start difference. First operand 2030 states and 2669 transitions. Second operand 10 states. [2019-09-09 18:51:33,325 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:52:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:52:34,248 INFO L93 Difference]: Finished difference Result 2217 states and 2855 transitions. [2019-09-09 18:52:34,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:52:34,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 453 [2019-09-09 18:52:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:52:34,256 INFO L225 Difference]: With dead ends: 2217 [2019-09-09 18:52:34,257 INFO L226 Difference]: Without dead ends: 2032 [2019-09-09 18:52:34,257 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-09-09 18:52:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-09-09 18:52:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2030. [2019-09-09 18:52:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2030 states. [2019-09-09 18:52:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2658 transitions. [2019-09-09 18:52:34,302 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2658 transitions. Word has length 453 [2019-09-09 18:52:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:52:34,303 INFO L475 AbstractCegarLoop]: Abstraction has 2030 states and 2658 transitions. [2019-09-09 18:52:34,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:52:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2658 transitions. [2019-09-09 18:52:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2019-09-09 18:52:34,309 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:52:34,310 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, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:52:34,310 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:52:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:52:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1446760509, now seen corresponding path program 1 times [2019-09-09 18:52:34,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:52:34,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:52:34,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:52:34,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:52:34,312 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:52:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:52:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 344 proven. 111 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-09-09 18:52:34,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:52:34,907 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:52:34,907 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 479 with the following transitions: [2019-09-09 18:52:34,907 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [197], [199], [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], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:52:34,910 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:52:34,911 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:52:48,606 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:53:05,549 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:53:05,550 INFO L272 AbstractInterpreter]: Visited 122 different actions 476 times. Merged at 6 different actions 18 times. Never widened. Performed 880 root evaluator evaluations with a maximum evaluation depth of 22. Performed 880 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:53:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:53:05,550 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:53:17,375 INFO L227 lantSequenceWeakener]: Weakened 475 states. On average, predicates are now at 77.47% of their original sizes. [2019-09-09 18:53:17,376 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:53:17,442 INFO L420 sIntCurrentIteration]: We unified 477 AI predicates to 477 [2019-09-09 18:53:17,442 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:53:17,442 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:53:17,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:53:17,443 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:53:17,443 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:53:17,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:53:17,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:53:17,444 INFO L87 Difference]: Start difference. First operand 2030 states and 2658 transitions. Second operand 10 states. [2019-09-09 18:55:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:55:11,038 INFO L93 Difference]: Finished difference Result 2403 states and 3098 transitions. [2019-09-09 18:55:11,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-09 18:55:11,038 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 478 [2019-09-09 18:55:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:55:11,048 INFO L225 Difference]: With dead ends: 2403 [2019-09-09 18:55:11,048 INFO L226 Difference]: Without dead ends: 2403 [2019-09-09 18:55:11,049 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 469 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 18:55:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2019-09-09 18:55:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2398. [2019-09-09 18:55:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2398 states. [2019-09-09 18:55:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 3093 transitions. [2019-09-09 18:55:11,102 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 3093 transitions. Word has length 478 [2019-09-09 18:55:11,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:55:11,103 INFO L475 AbstractCegarLoop]: Abstraction has 2398 states and 3093 transitions. [2019-09-09 18:55:11,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:55:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 3093 transitions. [2019-09-09 18:55:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2019-09-09 18:55:11,111 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:55:11,112 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:55:11,112 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:55:11,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:11,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1028955831, now seen corresponding path program 1 times [2019-09-09 18:55:11,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:55:11,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:11,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:55:11,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:11,114 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:55:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:55:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 461 proven. 467 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-09-09 18:55:12,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:55:12,476 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:55:12,477 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 556 with the following transitions: [2019-09-09 18:55:12,477 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [197], [199], [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], [526], [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], [662], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:55:12,480 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:55:12,480 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:55:26,231 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:55:48,575 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:55:48,575 INFO L272 AbstractInterpreter]: Visited 123 different actions 606 times. Merged at 7 different actions 31 times. Never widened. Performed 1103 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1103 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 8 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:55:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:48,576 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:55:58,906 INFO L227 lantSequenceWeakener]: Weakened 552 states. On average, predicates are now at 77.45% of their original sizes. [2019-09-09 18:55:58,906 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:55:58,988 INFO L420 sIntCurrentIteration]: We unified 554 AI predicates to 554 [2019-09-09 18:55:58,988 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:55:58,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:55:58,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2019-09-09 18:55:58,988 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:55:58,989 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:55:58,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:55:58,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:55:58,990 INFO L87 Difference]: Start difference. First operand 2398 states and 3093 transitions. Second operand 10 states.