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/Problem02_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 06:48:44,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 06:48:44,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 06:48:44,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 06:48:44,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 06:48:44,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 06:48:44,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 06:48:44,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 06:48:44,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 06:48:44,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 06:48:44,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 06:48:44,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 06:48:44,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 06:48:44,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 06:48:44,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 06:48:44,595 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 06:48:44,611 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 06:48:44,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 06:48:44,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 06:48:44,612 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 06:48:44,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 06:48:44,613 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 06:48:44,613 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 06:48:44,613 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 06:48:44,614 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 06:48:44,614 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 06:48:44,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 06:48:44,615 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 06:48:44,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 06:48:44,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 06:48:44,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 06:48:44,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 06:48:44,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 06:48:44,616 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 06:48:44,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 06:48:44,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 06:48:44,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 06:48:44,617 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 06:48:44,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 06:48:44,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 06:48:44,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 06:48:44,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 06:48:44,618 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 06:48:44,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 06:48:44,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 06:48:44,619 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 06:48:44,651 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 06:48:44,669 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 06:48:44,675 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 06:48:44,678 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 06:48:44,679 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 06:48:44,679 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label18.c [2019-09-09 06:48:44,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b5609621/4d7ea0fc25d34c78a0e75ac15be01949/FLAG9e3e1f563 [2019-09-09 06:48:45,328 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 06:48:45,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label18.c [2019-09-09 06:48:45,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b5609621/4d7ea0fc25d34c78a0e75ac15be01949/FLAG9e3e1f563 [2019-09-09 06:48:45,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b5609621/4d7ea0fc25d34c78a0e75ac15be01949 [2019-09-09 06:48:45,533 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 06:48:45,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 06:48:45,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 06:48:45,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 06:48:45,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 06:48:45,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:48:45" (1/1) ... [2019-09-09 06:48:45,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2288124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:45, skipping insertion in model container [2019-09-09 06:48:45,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:48:45" (1/1) ... [2019-09-09 06:48:45,555 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 06:48:45,608 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 06:48:45,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:48:46,001 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 06:48:46,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:48:46,238 INFO L192 MainTranslator]: Completed translation [2019-09-09 06:48:46,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46 WrapperNode [2019-09-09 06:48:46,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 06:48:46,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 06:48:46,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 06:48:46,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 06:48:46,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46" (1/1) ... [2019-09-09 06:48:46,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46" (1/1) ... [2019-09-09 06:48:46,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46" (1/1) ... [2019-09-09 06:48:46,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46" (1/1) ... [2019-09-09 06:48:46,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46" (1/1) ... [2019-09-09 06:48:46,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46" (1/1) ... [2019-09-09 06:48:46,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46" (1/1) ... [2019-09-09 06:48:46,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 06:48:46,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 06:48:46,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 06:48:46,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 06:48:46,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46" (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 06:48:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 06:48:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 06:48:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 06:48:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 06:48:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 06:48:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 06:48:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 06:48:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 06:48:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 06:48:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 06:48:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 06:48:47,662 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 06:48:47,663 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 06:48:47,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:48:47 BoogieIcfgContainer [2019-09-09 06:48:47,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 06:48:47,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 06:48:47,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 06:48:47,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 06:48:47,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:48:45" (1/3) ... [2019-09-09 06:48:47,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51da45bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:48:47, skipping insertion in model container [2019-09-09 06:48:47,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:48:46" (2/3) ... [2019-09-09 06:48:47,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51da45bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:48:47, skipping insertion in model container [2019-09-09 06:48:47,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:48:47" (3/3) ... [2019-09-09 06:48:47,675 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label18.c [2019-09-09 06:48:47,687 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 06:48:47,699 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 06:48:47,718 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 06:48:47,759 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 06:48:47,762 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 06:48:47,762 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 06:48:47,762 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 06:48:47,763 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 06:48:47,763 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 06:48:47,763 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 06:48:47,764 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 06:48:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-09-09 06:48:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-09 06:48:47,851 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:48:47,853 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:48:47,856 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:48:47,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:48:47,864 INFO L82 PathProgramCache]: Analyzing trace with hash -427743519, now seen corresponding path program 1 times [2019-09-09 06:48:47,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:48:47,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:47,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:48:47,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:47,930 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:48:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:48:48,504 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 06:48:48,506 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:48:48,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 06:48:48,508 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:48:48,514 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 06:48:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 06:48:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:48:48,535 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-09-09 06:48:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:48:49,572 INFO L93 Difference]: Finished difference Result 388 states and 554 transitions. [2019-09-09 06:48:49,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 06:48:49,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2019-09-09 06:48:49,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:48:49,605 INFO L225 Difference]: With dead ends: 388 [2019-09-09 06:48:49,605 INFO L226 Difference]: Without dead ends: 320 [2019-09-09 06:48:49,609 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:48:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-09-09 06:48:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-09-09 06:48:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-09-09 06:48:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-09-09 06:48:49,695 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 133 [2019-09-09 06:48:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:48:49,696 INFO L475 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-09-09 06:48:49,697 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 06:48:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-09-09 06:48:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-09 06:48:49,702 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:48:49,703 INFO L399 BasicCegarLoop]: trace histogram [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, 1] [2019-09-09 06:48:49,703 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:48:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:48:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash -309931354, now seen corresponding path program 1 times [2019-09-09 06:48:49,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:48:49,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:49,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:48:49,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:49,706 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:48:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:48:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:48:50,077 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:48:50,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 06:48:50,077 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:48:50,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 06:48:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 06:48:50,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:48:50,082 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 5 states. [2019-09-09 06:48:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:48:50,822 INFO L93 Difference]: Finished difference Result 407 states and 552 transitions. [2019-09-09 06:48:50,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 06:48:50,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-09-09 06:48:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:48:50,828 INFO L225 Difference]: With dead ends: 407 [2019-09-09 06:48:50,828 INFO L226 Difference]: Without dead ends: 320 [2019-09-09 06:48:50,829 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:48:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-09-09 06:48:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-09-09 06:48:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-09-09 06:48:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 461 transitions. [2019-09-09 06:48:50,852 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 461 transitions. Word has length 141 [2019-09-09 06:48:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:48:50,852 INFO L475 AbstractCegarLoop]: Abstraction has 320 states and 461 transitions. [2019-09-09 06:48:50,852 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 06:48:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 461 transitions. [2019-09-09 06:48:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-09 06:48:50,857 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:48:50,857 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 06:48:50,857 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:48:50,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:48:50,858 INFO L82 PathProgramCache]: Analyzing trace with hash 325171058, now seen corresponding path program 1 times [2019-09-09 06:48:50,858 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:48:50,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:50,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:48:50,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:50,860 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:48:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:48:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:48:51,147 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:48:51,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 06:48:51,148 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:48:51,148 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 06:48:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 06:48:51,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:48:51,149 INFO L87 Difference]: Start difference. First operand 320 states and 461 transitions. Second operand 5 states. [2019-09-09 06:48:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:48:51,977 INFO L93 Difference]: Finished difference Result 403 states and 544 transitions. [2019-09-09 06:48:51,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 06:48:51,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-09-09 06:48:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:48:51,982 INFO L225 Difference]: With dead ends: 403 [2019-09-09 06:48:51,983 INFO L226 Difference]: Without dead ends: 320 [2019-09-09 06:48:51,983 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:48:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-09-09 06:48:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-09-09 06:48:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-09-09 06:48:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 455 transitions. [2019-09-09 06:48:52,028 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 455 transitions. Word has length 147 [2019-09-09 06:48:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:48:52,028 INFO L475 AbstractCegarLoop]: Abstraction has 320 states and 455 transitions. [2019-09-09 06:48:52,029 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 06:48:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 455 transitions. [2019-09-09 06:48:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-09 06:48:52,037 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:48:52,041 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 06:48:52,042 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:48:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:48:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1977398583, now seen corresponding path program 1 times [2019-09-09 06:48:52,043 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:48:52,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:52,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:48:52,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:52,046 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:48:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:48:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:48:52,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:48:52,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 06:48:52,172 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:48:52,172 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 06:48:52,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 06:48:52,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 06:48:52,173 INFO L87 Difference]: Start difference. First operand 320 states and 455 transitions. Second operand 6 states. [2019-09-09 06:48:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:48:53,058 INFO L93 Difference]: Finished difference Result 637 states and 894 transitions. [2019-09-09 06:48:53,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 06:48:53,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-09-09 06:48:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:48:53,068 INFO L225 Difference]: With dead ends: 637 [2019-09-09 06:48:53,068 INFO L226 Difference]: Without dead ends: 637 [2019-09-09 06:48:53,068 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 06:48:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2019-09-09 06:48:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 626. [2019-09-09 06:48:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-09-09 06:48:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 871 transitions. [2019-09-09 06:48:53,111 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 871 transitions. Word has length 155 [2019-09-09 06:48:53,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:48:53,111 INFO L475 AbstractCegarLoop]: Abstraction has 626 states and 871 transitions. [2019-09-09 06:48:53,111 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 06:48:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 871 transitions. [2019-09-09 06:48:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-09 06:48:53,115 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:48:53,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:48:53,116 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:48:53,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:48:53,116 INFO L82 PathProgramCache]: Analyzing trace with hash -282643699, now seen corresponding path program 1 times [2019-09-09 06:48:53,116 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:48:53,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:53,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:48:53,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:53,118 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:48:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:48:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:48:53,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:48:53,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 06:48:53,382 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:48:53,382 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 06:48:53,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 06:48:53,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:48:53,384 INFO L87 Difference]: Start difference. First operand 626 states and 871 transitions. Second operand 5 states. [2019-09-09 06:48:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:48:54,125 INFO L93 Difference]: Finished difference Result 710 states and 957 transitions. [2019-09-09 06:48:54,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 06:48:54,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-09-09 06:48:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:48:54,130 INFO L225 Difference]: With dead ends: 710 [2019-09-09 06:48:54,130 INFO L226 Difference]: Without dead ends: 626 [2019-09-09 06:48:54,130 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:48:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-09-09 06:48:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-09-09 06:48:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-09-09 06:48:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 859 transitions. [2019-09-09 06:48:54,151 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 859 transitions. Word has length 157 [2019-09-09 06:48:54,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:48:54,151 INFO L475 AbstractCegarLoop]: Abstraction has 626 states and 859 transitions. [2019-09-09 06:48:54,151 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 06:48:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 859 transitions. [2019-09-09 06:48:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-09 06:48:54,155 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:48:54,155 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:48:54,155 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:48:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:48:54,156 INFO L82 PathProgramCache]: Analyzing trace with hash -440018095, now seen corresponding path program 1 times [2019-09-09 06:48:54,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:48:54,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:54,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:48:54,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:54,157 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:48:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:48:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:48:54,392 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:48:54,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 06:48:54,392 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:48:54,393 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 06:48:54,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 06:48:54,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:48:54,393 INFO L87 Difference]: Start difference. First operand 626 states and 859 transitions. Second operand 5 states. [2019-09-09 06:48:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:48:55,093 INFO L93 Difference]: Finished difference Result 712 states and 947 transitions. [2019-09-09 06:48:55,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 06:48:55,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2019-09-09 06:48:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:48:55,097 INFO L225 Difference]: With dead ends: 712 [2019-09-09 06:48:55,097 INFO L226 Difference]: Without dead ends: 626 [2019-09-09 06:48:55,098 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-09 06:48:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-09-09 06:48:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-09-09 06:48:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-09-09 06:48:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 843 transitions. [2019-09-09 06:48:55,116 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 843 transitions. Word has length 159 [2019-09-09 06:48:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:48:55,117 INFO L475 AbstractCegarLoop]: Abstraction has 626 states and 843 transitions. [2019-09-09 06:48:55,117 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 06:48:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 843 transitions. [2019-09-09 06:48:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-09 06:48:55,120 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:48:55,120 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 06:48:55,121 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:48:55,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:48:55,121 INFO L82 PathProgramCache]: Analyzing trace with hash -988582951, now seen corresponding path program 1 times [2019-09-09 06:48:55,121 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:48:55,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:55,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:48:55,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:55,123 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:48:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:48:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:48:55,212 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:48:55,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 06:48:55,212 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:48:55,213 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 06:48:55,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 06:48:55,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 06:48:55,214 INFO L87 Difference]: Start difference. First operand 626 states and 843 transitions. Second operand 6 states. [2019-09-09 06:48:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:48:56,034 INFO L93 Difference]: Finished difference Result 1238 states and 1704 transitions. [2019-09-09 06:48:56,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 06:48:56,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2019-09-09 06:48:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:48:56,047 INFO L225 Difference]: With dead ends: 1238 [2019-09-09 06:48:56,048 INFO L226 Difference]: Without dead ends: 1238 [2019-09-09 06:48:56,049 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 06:48:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2019-09-09 06:48:56,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1218. [2019-09-09 06:48:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2019-09-09 06:48:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1637 transitions. [2019-09-09 06:48:56,122 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1637 transitions. Word has length 163 [2019-09-09 06:48:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:48:56,122 INFO L475 AbstractCegarLoop]: Abstraction has 1218 states and 1637 transitions. [2019-09-09 06:48:56,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 06:48:56,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1637 transitions. [2019-09-09 06:48:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-09-09 06:48:56,131 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:48:56,132 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 06:48:56,133 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:48:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:48:56,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1094001216, now seen corresponding path program 1 times [2019-09-09 06:48:56,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:48:56,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:56,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:48:56,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:48:56,135 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:48:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:48:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:48:56,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 06:48:56,524 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 06:48:56,525 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 169 with the following transitions: [2019-09-09 06:48:56,528 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [25], [26], [30], [34], [38], [42], [53], [64], [68], [72], [75], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [152], [156], [160], [171], [175], [179], [183], [187], [191], [195], [199], [210], [214], [218], [222], [233], [237], [241], [245], [249], [253], [257], [268], [272], [283], [287], [298], [309], [313], [317], [321], [325], [329], [333], [344], [348], [352], [356], [360], [364], [368], [372], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [587], [595], [603], [611], [619], [627], [635], [643], [651], [659], [667], [675], [683], [691], [699], [707], [715], [723], [731], [739], [743], [745], [863], [867], [876], [880], [882], [887], [888], [889], [891], [892] [2019-09-09 06:48:56,605 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 06:48:56,605 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 07:01:15,358 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 07:01:15,361 INFO L272 AbstractInterpreter]: Visited 137 different actions 403 times. Merged at 6 different actions 12 times. Never widened. Performed 898 root evaluator evaluations with a maximum evaluation depth of 18. Performed 898 inverse root evaluator evaluations with a maximum inverse evaluation depth of 18. Found 3 fixpoints after 2 different actions. Largest state had 38 variables. [2019-09-09 07:01:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 07:01:15,366 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates