java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 14:05:03,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 14:05:03,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 14:05:03,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 14:05:03,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 14:05:03,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 14:05:03,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 14:05:03,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 14:05:03,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 14:05:03,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 14:05:03,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 14:05:03,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 14:05:03,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 14:05:03,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 14:05:03,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 14:05:03,812 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 14:05:03,826 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 14:05:03,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 14:05:03,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 14:05:03,828 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 14:05:03,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 14:05:03,829 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 14:05:03,829 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 14:05:03,830 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 14:05:03,830 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 14:05:03,830 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 14:05:03,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 14:05:03,831 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 14:05:03,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 14:05:03,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 14:05:03,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 14:05:03,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 14:05:03,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 14:05:03,833 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 14:05:03,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 14:05:03,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 14:05:03,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 14:05:03,834 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 14:05:03,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 14:05:03,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 14:05:03,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 14:05:03,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 14:05:03,835 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 14:05:03,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 14:05:03,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 14:05:03,836 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 14:05:03,883 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 14:05:03,896 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 14:05:03,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 14:05:03,901 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 14:05:03,901 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 14:05:03,902 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label02.c [2019-09-09 14:05:03,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0459f12d6/d902b640cc4f4fcc8826c97882cf12a9/FLAG6aec9ff0e [2019-09-09 14:05:04,518 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 14:05:04,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label02.c [2019-09-09 14:05:04,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0459f12d6/d902b640cc4f4fcc8826c97882cf12a9/FLAG6aec9ff0e [2019-09-09 14:05:04,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0459f12d6/d902b640cc4f4fcc8826c97882cf12a9 [2019-09-09 14:05:04,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 14:05:04,836 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 14:05:04,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 14:05:04,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 14:05:04,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 14:05:04,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:05:04" (1/1) ... [2019-09-09 14:05:04,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3517eb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:04, skipping insertion in model container [2019-09-09 14:05:04,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 02:05:04" (1/1) ... [2019-09-09 14:05:04,853 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 14:05:04,910 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 14:05:05,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:05:05,469 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 14:05:05,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 14:05:05,607 INFO L192 MainTranslator]: Completed translation [2019-09-09 14:05:05,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05 WrapperNode [2019-09-09 14:05:05,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 14:05:05,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 14:05:05,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 14:05:05,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 14:05:05,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05" (1/1) ... [2019-09-09 14:05:05,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05" (1/1) ... [2019-09-09 14:05:05,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05" (1/1) ... [2019-09-09 14:05:05,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05" (1/1) ... [2019-09-09 14:05:05,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05" (1/1) ... [2019-09-09 14:05:05,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05" (1/1) ... [2019-09-09 14:05:05,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05" (1/1) ... [2019-09-09 14:05:05,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 14:05:05,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 14:05:05,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 14:05:05,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 14:05:05,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05" (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 14:05:05,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 14:05:05,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 14:05:05,781 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 14:05:05,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 14:05:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 14:05:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 14:05:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 14:05:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 14:05:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 14:05:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 14:05:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 14:05:07,398 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 14:05:07,398 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 14:05:07,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:05:07 BoogieIcfgContainer [2019-09-09 14:05:07,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 14:05:07,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 14:05:07,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 14:05:07,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 14:05:07,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 02:05:04" (1/3) ... [2019-09-09 14:05:07,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373cd991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:05:07, skipping insertion in model container [2019-09-09 14:05:07,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 02:05:05" (2/3) ... [2019-09-09 14:05:07,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373cd991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 02:05:07, skipping insertion in model container [2019-09-09 14:05:07,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 02:05:07" (3/3) ... [2019-09-09 14:05:07,409 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label02.c [2019-09-09 14:05:07,420 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 14:05:07,430 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 14:05:07,448 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 14:05:07,483 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 14:05:07,484 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 14:05:07,484 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 14:05:07,485 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 14:05:07,485 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 14:05:07,485 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 14:05:07,485 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 14:05:07,486 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 14:05:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-09-09 14:05:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-09 14:05:07,531 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:05:07,532 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:05:07,534 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:05:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:05:07,540 INFO L82 PathProgramCache]: Analyzing trace with hash -824341666, now seen corresponding path program 1 times [2019-09-09 14:05:07,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:05:07,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:05:07,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:05:07,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:05:07,589 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:05:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:05:07,931 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 14:05:07,933 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:05:07,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 14:05:07,934 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:05:07,942 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 14:05:07,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 14:05:07,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 14:05:07,961 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-09-09 14:05:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:05:09,117 INFO L93 Difference]: Finished difference Result 362 states and 555 transitions. [2019-09-09 14:05:09,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 14:05:09,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2019-09-09 14:05:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:05:09,148 INFO L225 Difference]: With dead ends: 362 [2019-09-09 14:05:09,148 INFO L226 Difference]: Without dead ends: 294 [2019-09-09 14:05:09,151 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 14:05:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-09-09 14:05:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-09-09 14:05:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-09-09 14:05:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-09-09 14:05:09,279 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 65 [2019-09-09 14:05:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:05:09,281 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-09-09 14:05:09,282 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 14:05:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-09-09 14:05:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-09-09 14:05:09,298 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:05:09,299 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 14:05:09,299 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:05:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:05:09,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1983600497, now seen corresponding path program 1 times [2019-09-09 14:05:09,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:05:09,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:05:09,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:05:09,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:05:09,303 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:05:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:05:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:05:09,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:05:09,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 14:05:09,537 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:05:09,539 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 14:05:09,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 14:05:09,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 14:05:09,540 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-09-09 14:05:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:05:10,734 INFO L93 Difference]: Finished difference Result 866 states and 1202 transitions. [2019-09-09 14:05:10,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 14:05:10,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 184 [2019-09-09 14:05:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:05:10,742 INFO L225 Difference]: With dead ends: 866 [2019-09-09 14:05:10,743 INFO L226 Difference]: Without dead ends: 866 [2019-09-09 14:05:10,744 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 14:05:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-09-09 14:05:10,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 723. [2019-09-09 14:05:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2019-09-09 14:05:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1036 transitions. [2019-09-09 14:05:10,783 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1036 transitions. Word has length 184 [2019-09-09 14:05:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:05:10,784 INFO L475 AbstractCegarLoop]: Abstraction has 723 states and 1036 transitions. [2019-09-09 14:05:10,784 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 14:05:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1036 transitions. [2019-09-09 14:05:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-09 14:05:10,791 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:05:10,791 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:05:10,792 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:05:10,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:05:10,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1277665994, now seen corresponding path program 1 times [2019-09-09 14:05:10,792 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:05:10,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:05:10,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:05:10,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:05:10,794 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:05:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:05:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:05:11,063 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 14:05:11,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 14:05:11,063 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:05:11,064 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 14:05:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 14:05:11,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 14:05:11,067 INFO L87 Difference]: Start difference. First operand 723 states and 1036 transitions. Second operand 6 states. [2019-09-09 14:05:12,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:05:12,027 INFO L93 Difference]: Finished difference Result 896 states and 1207 transitions. [2019-09-09 14:05:12,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:05:12,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2019-09-09 14:05:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:05:12,036 INFO L225 Difference]: With dead ends: 896 [2019-09-09 14:05:12,037 INFO L226 Difference]: Without dead ends: 896 [2019-09-09 14:05:12,037 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 14:05:12,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-09-09 14:05:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 880. [2019-09-09 14:05:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-09-09 14:05:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1167 transitions. [2019-09-09 14:05:12,076 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1167 transitions. Word has length 191 [2019-09-09 14:05:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:05:12,077 INFO L475 AbstractCegarLoop]: Abstraction has 880 states and 1167 transitions. [2019-09-09 14:05:12,078 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 14:05:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1167 transitions. [2019-09-09 14:05:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-09-09 14:05:12,085 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:05:12,085 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:12,086 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:05:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:05:12,087 INFO L82 PathProgramCache]: Analyzing trace with hash -480749415, now seen corresponding path program 1 times [2019-09-09 14:05:12,087 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:05:12,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:05:12,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:05:12,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:05:12,089 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:05:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:05:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 116 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 14:05:12,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:05:12,308 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:05:12,310 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 261 with the following transitions: [2019-09-09 14:05:12,312 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [494], [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], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [722], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:05:12,386 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:05:12,387 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:05:51,401 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:05:51,405 INFO L272 AbstractInterpreter]: Visited 131 different actions 131 times. Never merged. Never widened. Performed 168 root evaluator evaluations with a maximum evaluation depth of 16. Performed 168 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 14:05:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:05:51,410 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:06:23,332 INFO L227 lantSequenceWeakener]: Weakened 251 states. On average, predicates are now at 73.47% of their original sizes. [2019-09-09 14:06:23,332 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:06:23,372 INFO L420 sIntCurrentIteration]: We unified 259 AI predicates to 259 [2019-09-09 14:06:23,372 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:06:23,373 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:06:23,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-09-09 14:06:23,374 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:06:23,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 14:06:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 14:06:23,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 14:06:23,375 INFO L87 Difference]: Start difference. First operand 880 states and 1167 transitions. Second operand 7 states. [2019-09-09 14:06:30,249 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:10:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:10:11,148 INFO L93 Difference]: Finished difference Result 1024 states and 1319 transitions. [2019-09-09 14:10:11,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 14:10:11,148 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 260 [2019-09-09 14:10:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:10:11,153 INFO L225 Difference]: With dead ends: 1024 [2019-09-09 14:10:11,154 INFO L226 Difference]: Without dead ends: 1024 [2019-09-09 14:10:11,154 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-09-09 14:10:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2019-09-09 14:10:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1023. [2019-09-09 14:10:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2019-09-09 14:10:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1318 transitions. [2019-09-09 14:10:11,184 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1318 transitions. Word has length 260 [2019-09-09 14:10:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:10:11,184 INFO L475 AbstractCegarLoop]: Abstraction has 1023 states and 1318 transitions. [2019-09-09 14:10:11,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-09 14:10:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1318 transitions. [2019-09-09 14:10:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-09-09 14:10:11,190 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:10:11,191 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:10:11,191 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:10:11,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:10:11,192 INFO L82 PathProgramCache]: Analyzing trace with hash -26378547, now seen corresponding path program 1 times [2019-09-09 14:10:11,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:10:11,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:10:11,193 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:10:11,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:10:11,194 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:10:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:10:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 14:10:11,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:10:11,383 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:10:11,383 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 271 with the following transitions: [2019-09-09 14:10:11,384 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [722], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:10:11,390 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:10:11,391 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:10:22,317 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:11:31,138 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:11:31,141 INFO L272 AbstractInterpreter]: Visited 134 different actions 261 times. Merged at 3 different actions 3 times. Never widened. Performed 395 root evaluator evaluations with a maximum evaluation depth of 16. Performed 395 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:11:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:11:31,142 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 14:12:14,020 INFO L227 lantSequenceWeakener]: Weakened 267 states. On average, predicates are now at 73.46% of their original sizes. [2019-09-09 14:12:14,021 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 14:12:14,162 INFO L420 sIntCurrentIteration]: We unified 269 AI predicates to 269 [2019-09-09 14:12:14,162 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 14:12:14,162 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 14:12:14,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 14:12:14,163 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 14:12:14,164 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 14:12:14,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 14:12:14,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 14:12:14,166 INFO L87 Difference]: Start difference. First operand 1023 states and 1318 transitions. Second operand 11 states. [2019-09-09 14:15:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 14:15:51,999 INFO L93 Difference]: Finished difference Result 1190 states and 1486 transitions. [2019-09-09 14:15:52,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 14:15:52,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 270 [2019-09-09 14:15:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 14:15:52,005 INFO L225 Difference]: With dead ends: 1190 [2019-09-09 14:15:52,005 INFO L226 Difference]: Without dead ends: 1024 [2019-09-09 14:15:52,006 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 260 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 14:15:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2019-09-09 14:15:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1023. [2019-09-09 14:15:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2019-09-09 14:15:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1317 transitions. [2019-09-09 14:15:52,031 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1317 transitions. Word has length 270 [2019-09-09 14:15:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 14:15:52,032 INFO L475 AbstractCegarLoop]: Abstraction has 1023 states and 1317 transitions. [2019-09-09 14:15:52,032 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 14:15:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1317 transitions. [2019-09-09 14:15:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-09-09 14:15:52,038 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 14:15:52,039 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, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 14:15:52,039 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 14:15:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:15:52,040 INFO L82 PathProgramCache]: Analyzing trace with hash -389193643, now seen corresponding path program 1 times [2019-09-09 14:15:52,040 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 14:15:52,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:52,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 14:15:52,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 14:15:52,042 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 14:15:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 14:15:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 117 proven. 46 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-09-09 14:15:52,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 14:15:52,273 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 14:15:52,274 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 307 with the following transitions: [2019-09-09 14:15:52,274 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [429], [431], [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], [663], [667], [671], [675], [678], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [722], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-09-09 14:15:52,278 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 14:15:52,279 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 14:16:25,966 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 14:17:48,347 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 14:17:48,348 INFO L272 AbstractInterpreter]: Visited 134 different actions 262 times. Merged at 4 different actions 4 times. Never widened. Performed 497 root evaluator evaluations with a maximum evaluation depth of 16. Performed 497 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 14:17:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 14:17:48,348 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates