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/Problem18_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:23:16,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:23:16,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:23:16,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 22:23:16,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 22:23:16,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 22:23:16,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 22:23:16,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 22:23:16,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 22:23:16,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 22:23:16,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 22:23:16,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 22:23:16,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 22:23:16,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 22:23:16,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 22:23:16,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 22:23:16,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 22:23:16,569 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 22:23:16,583 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:23:16,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:23:16,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:23:16,584 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:23:16,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:23:16,585 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:23:16,585 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:23:16,585 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:23:16,585 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:23:16,586 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:23:16,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:23:16,586 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:23:16,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:23:16,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:23:16,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:23:16,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:23:16,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:23:16,588 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:23:16,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:23:16,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:23:16,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:23:16,588 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:23:16,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:23:16,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:23:16,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:23:16,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:23:16,589 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:23:16,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:23:16,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:23:16,590 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:23:16,617 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:23:16,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:23:16,632 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:23:16,634 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:23:16,634 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:23:16,635 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label34.c [2019-09-09 22:23:16,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aaab488f/98386a753d644fa2a9cce7f48aeae62d/FLAG584369439 [2019-09-09 22:23:17,430 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:23:17,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label34.c [2019-09-09 22:23:17,457 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aaab488f/98386a753d644fa2a9cce7f48aeae62d/FLAG584369439 [2019-09-09 22:23:17,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aaab488f/98386a753d644fa2a9cce7f48aeae62d [2019-09-09 22:23:17,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:23:17,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:23:17,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:23:17,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:23:17,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:23:17,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:23:17" (1/1) ... [2019-09-09 22:23:17,608 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 10:23:17, skipping insertion in model container [2019-09-09 22:23:17,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:23:17" (1/1) ... [2019-09-09 22:23:17,616 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:23:17,748 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:23:18,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:23:18,919 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:23:19,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:23:19,378 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:23:19,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19 WrapperNode [2019-09-09 22:23:19,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:23:19,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:23:19,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:23:19,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:23:19,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19" (1/1) ... [2019-09-09 22:23:19,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19" (1/1) ... [2019-09-09 22:23:19,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19" (1/1) ... [2019-09-09 22:23:19,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19" (1/1) ... [2019-09-09 22:23:19,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19" (1/1) ... [2019-09-09 22:23:19,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19" (1/1) ... [2019-09-09 22:23:19,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19" (1/1) ... [2019-09-09 22:23:19,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:23:19,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:23:19,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:23:19,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:23:19,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19" (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 22:23:19,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:23:19,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:23:19,759 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:23:19,759 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:23:19,759 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:23:19,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:23:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:23:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:23:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:23:19,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:23:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:23:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:23:19,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:23:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:23:19,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:23:23,888 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:23:23,891 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:23:23,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:23:23 BoogieIcfgContainer [2019-09-09 22:23:23,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:23:23,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:23:23,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:23:23,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:23:23,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:23:17" (1/3) ... [2019-09-09 22:23:23,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc976c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:23:23, skipping insertion in model container [2019-09-09 22:23:23,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:23:19" (2/3) ... [2019-09-09 22:23:23,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc976c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:23:23, skipping insertion in model container [2019-09-09 22:23:23,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:23:23" (3/3) ... [2019-09-09 22:23:23,916 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label34.c [2019-09-09 22:23:23,932 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:23:23,949 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:23:23,976 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:23:24,014 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:23:24,015 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:23:24,016 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:23:24,016 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:23:24,016 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:23:24,016 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:23:24,017 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:23:24,017 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:23:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:23:24,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-09 22:23:24,082 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:23:24,083 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:23:24,085 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:23:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:23:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash -415244174, now seen corresponding path program 1 times [2019-09-09 22:23:24,094 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:23:24,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:24,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:23:24,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:24,150 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:23:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:23:24,448 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 22:23:24,450 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:23:24,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:23:24,451 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:23:24,456 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:23:24,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:23:24,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:23:24,474 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:23:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:23:29,117 INFO L93 Difference]: Finished difference Result 1480 states and 2667 transitions. [2019-09-09 22:23:29,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:23:29,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-09 22:23:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:23:29,163 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:23:29,164 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:23:29,165 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:23:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:23:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:23:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:23:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-09-09 22:23:29,300 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 13 [2019-09-09 22:23:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:23:29,301 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-09-09 22:23:29,301 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:23:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-09-09 22:23:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-09 22:23:29,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:23:29,306 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 22:23:29,306 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:23:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:23:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1856276731, now seen corresponding path program 1 times [2019-09-09 22:23:29,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:23:29,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:29,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:23:29,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:29,308 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:23:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:23:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:23:29,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:23:29,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:23:29,495 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:23:29,497 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:23:29,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:23:29,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:23:29,498 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-09-09 22:23:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:23:34,838 INFO L93 Difference]: Finished difference Result 2166 states and 3658 transitions. [2019-09-09 22:23:34,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:23:34,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2019-09-09 22:23:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:23:34,852 INFO L225 Difference]: With dead ends: 2166 [2019-09-09 22:23:34,852 INFO L226 Difference]: Without dead ends: 2166 [2019-09-09 22:23:34,853 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 22:23:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-09-09 22:23:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-09-09 22:23:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-09-09 22:23:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-09-09 22:23:34,923 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 84 [2019-09-09 22:23:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:23:34,924 INFO L475 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-09-09 22:23:34,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:23:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-09-09 22:23:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-09 22:23:34,932 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:23:34,932 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 22:23:34,933 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:23:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:23:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash 94685542, now seen corresponding path program 1 times [2019-09-09 22:23:34,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:23:34,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:34,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:23:34,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:34,937 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:23:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:23:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:23:35,135 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:23:35,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:23:35,136 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:23:35,137 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:23:35,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:23:35,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:23:35,138 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-09-09 22:23:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:23:40,269 INFO L93 Difference]: Finished difference Result 2911 states and 4533 transitions. [2019-09-09 22:23:40,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:23:40,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-09-09 22:23:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:23:40,291 INFO L225 Difference]: With dead ends: 2911 [2019-09-09 22:23:40,293 INFO L226 Difference]: Without dead ends: 2911 [2019-09-09 22:23:40,293 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 22:23:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-09-09 22:23:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-09-09 22:23:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-09-09 22:23:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-09-09 22:23:40,386 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 107 [2019-09-09 22:23:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:23:40,386 INFO L475 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-09-09 22:23:40,386 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:23:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-09-09 22:23:40,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-09 22:23:40,393 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:23:40,393 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 22:23:40,393 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:23:40,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:23:40,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164818, now seen corresponding path program 1 times [2019-09-09 22:23:40,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:23:40,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:40,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:23:40,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:40,395 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:23:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:23:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:23:40,574 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:23:40,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:23:40,575 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:23:40,577 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:23:40,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:23:40,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:23:40,578 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-09-09 22:23:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:23:45,198 INFO L93 Difference]: Finished difference Result 3662 states and 5163 transitions. [2019-09-09 22:23:45,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:23:45,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2019-09-09 22:23:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:23:45,215 INFO L225 Difference]: With dead ends: 3662 [2019-09-09 22:23:45,216 INFO L226 Difference]: Without dead ends: 3662 [2019-09-09 22:23:45,216 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 22:23:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-09-09 22:23:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-09-09 22:23:45,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-09-09 22:23:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-09-09 22:23:45,297 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 111 [2019-09-09 22:23:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:23:45,298 INFO L475 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-09-09 22:23:45,298 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:23:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-09-09 22:23:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-09 22:23:45,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:23:45,305 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:23:45,305 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:23:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:23:45,306 INFO L82 PathProgramCache]: Analyzing trace with hash -259067697, now seen corresponding path program 1 times [2019-09-09 22:23:45,306 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:23:45,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:45,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:23:45,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:45,307 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:23:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:23:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:23:45,492 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:23:45,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:23:45,492 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:23:45,493 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:23:45,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:23:45,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:23:45,493 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-09-09 22:23:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:23:50,601 INFO L93 Difference]: Finished difference Result 6768 states and 9269 transitions. [2019-09-09 22:23:50,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:23:50,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-09-09 22:23:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:23:50,628 INFO L225 Difference]: With dead ends: 6768 [2019-09-09 22:23:50,628 INFO L226 Difference]: Without dead ends: 6768 [2019-09-09 22:23:50,628 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 22:23:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-09-09 22:23:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-09-09 22:23:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-09-09 22:23:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-09-09 22:23:50,773 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 142 [2019-09-09 22:23:50,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:23:50,774 INFO L475 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-09-09 22:23:50,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:23:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-09-09 22:23:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-09-09 22:23:50,777 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:23:50,777 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 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 22:23:50,777 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:23:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:23:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash 88602063, now seen corresponding path program 1 times [2019-09-09 22:23:50,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:23:50,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:50,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:23:50,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:23:50,779 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:23:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:23:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 22:23:50,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:23:50,946 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:23:50,947 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 175 with the following transitions: [2019-09-09 22:23:50,950 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1635], [1637], [1640], [1648], [1656], [1664], [1672], [1680], [1688], [1696], [1704], [1712], [1720], [1728], [1736], [1744], [1752], [1760], [1768], [1776], [1784], [1792], [1800], [1808], [1816], [1824], [1832], [1840], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2124], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2200], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:23:51,024 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:23:51,025 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:23:55,188 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:23:55,190 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 229 root evaluator evaluations with a maximum evaluation depth of 13. Performed 229 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:23:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:23:55,195 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:23:58,443 INFO L227 lantSequenceWeakener]: Weakened 155 states. On average, predicates are now at 77.31% of their original sizes. [2019-09-09 22:23:58,443 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:23:58,522 INFO L420 sIntCurrentIteration]: We unified 173 AI predicates to 173 [2019-09-09 22:23:58,523 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:23:58,523 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:23:58,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 22:23:58,524 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:23:58,525 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:23:58,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:23:58,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:23:58,525 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 10 states. [2019-09-09 22:25:41,702 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.