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/Problem15_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:09:21,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:09:21,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:09:21,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 19:09:21,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 19:09:21,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 19:09:21,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 19:09:21,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 19:09:21,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 19:09:21,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 19:09:21,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 19:09:21,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 19:09:21,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 19:09:21,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 19:09:21,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 19:09:21,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 19:09:21,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 19:09:21,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 19:09:21,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 19:09:21,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 19:09:21,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 19:09:21,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 19:09:21,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 19:09:21,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 19:09:21,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 19:09:21,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 19:09:21,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 19:09:21,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 19:09:21,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 19:09:21,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 19:09:21,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 19:09:21,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 19:09:21,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 19:09:21,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 19:09:21,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 19:09:21,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 19:09:21,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 19:09:21,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 19:09:21,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 19:09:21,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 19:09:21,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 19:09:21,591 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 19:09:21,606 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:09:21,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:09:21,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:09:21,607 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:09:21,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:09:21,608 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:09:21,609 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:09:21,609 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:09:21,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:09:21,609 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:09:21,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:09:21,610 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:09:21,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:09:21,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:09:21,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:09:21,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:09:21,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:09:21,611 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:09:21,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:09:21,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:09:21,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:09:21,612 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:09:21,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:09:21,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:09:21,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:09:21,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:09:21,613 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:09:21,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:09:21,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:09:21,614 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:09:21,644 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:09:21,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:09:21,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:09:21,662 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:09:21,662 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:09:21,663 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-09-09 19:09:21,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982799c43/f8e93ffdb6ff47538eed4cd37fceaa35/FLAG5a0272d43 [2019-09-09 19:09:22,395 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:09:22,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-09-09 19:09:22,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982799c43/f8e93ffdb6ff47538eed4cd37fceaa35/FLAG5a0272d43 [2019-09-09 19:09:22,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/982799c43/f8e93ffdb6ff47538eed4cd37fceaa35 [2019-09-09 19:09:22,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:09:22,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:09:22,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:09:22,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:09:22,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:09:22,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:09:22" (1/1) ... [2019-09-09 19:09:22,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122e0d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:22, skipping insertion in model container [2019-09-09 19:09:22,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:09:22" (1/1) ... [2019-09-09 19:09:22,625 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:09:22,724 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:09:23,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:09:23,707 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:09:23,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:09:24,000 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:09:24,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24 WrapperNode [2019-09-09 19:09:24,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:09:24,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:09:24,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:09:24,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:09:24,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24" (1/1) ... [2019-09-09 19:09:24,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24" (1/1) ... [2019-09-09 19:09:24,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24" (1/1) ... [2019-09-09 19:09:24,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24" (1/1) ... [2019-09-09 19:09:24,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24" (1/1) ... [2019-09-09 19:09:24,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24" (1/1) ... [2019-09-09 19:09:24,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24" (1/1) ... [2019-09-09 19:09:24,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:09:24,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:09:24,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:09:24,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:09:24,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24" (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 19:09:24,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:09:24,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:09:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:09:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:09:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:09:24,313 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:09:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:09:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:09:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:09:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:09:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:09:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:09:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:09:27,314 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:09:27,315 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:09:27,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:09:27 BoogieIcfgContainer [2019-09-09 19:09:27,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:09:27,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:09:27,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:09:27,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:09:27,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:09:22" (1/3) ... [2019-09-09 19:09:27,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d04572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:09:27, skipping insertion in model container [2019-09-09 19:09:27,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:09:24" (2/3) ... [2019-09-09 19:09:27,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d04572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:09:27, skipping insertion in model container [2019-09-09 19:09:27,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:09:27" (3/3) ... [2019-09-09 19:09:27,326 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label23.c [2019-09-09 19:09:27,337 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:09:27,347 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:09:27,369 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:09:27,399 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:09:27,400 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:09:27,400 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:09:27,400 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:09:27,400 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:09:27,400 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:09:27,401 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:09:27,401 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:09:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:09:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-09 19:09:27,455 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:09:27,456 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] [2019-09-09 19:09:27,458 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:09:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:09:27,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1150521477, now seen corresponding path program 1 times [2019-09-09 19:09:27,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:09:27,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:09:27,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:09:27,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:09:27,526 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:09:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:09:27,883 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 19:09:27,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:09:27,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:09:27,886 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:09:27,892 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:09:27,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:09:27,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:09:27,910 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 19:09:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:09:32,945 INFO L93 Difference]: Finished difference Result 1123 states and 1943 transitions. [2019-09-09 19:09:32,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:09:32,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-09-09 19:09:32,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:09:32,982 INFO L225 Difference]: With dead ends: 1123 [2019-09-09 19:09:32,982 INFO L226 Difference]: Without dead ends: 1036 [2019-09-09 19:09:32,987 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:09:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-09-09 19:09:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 697. [2019-09-09 19:09:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-09-09 19:09:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1188 transitions. [2019-09-09 19:09:33,099 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1188 transitions. Word has length 23 [2019-09-09 19:09:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:09:33,099 INFO L475 AbstractCegarLoop]: Abstraction has 697 states and 1188 transitions. [2019-09-09 19:09:33,099 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:09:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1188 transitions. [2019-09-09 19:09:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-09 19:09:33,103 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:09:33,104 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 19:09:33,104 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:09:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:09:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1552013474, now seen corresponding path program 1 times [2019-09-09 19:09:33,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:09:33,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:09:33,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:09:33,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:09:33,107 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:09:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:09:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:09:33,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:09:33,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 19:09:33,274 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:09:33,276 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 19:09:33,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 19:09:33,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 19:09:33,277 INFO L87 Difference]: Start difference. First operand 697 states and 1188 transitions. Second operand 3 states. [2019-09-09 19:09:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:09:35,503 INFO L93 Difference]: Finished difference Result 1318 states and 1933 transitions. [2019-09-09 19:09:35,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 19:09:35,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-09-09 19:09:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:09:35,512 INFO L225 Difference]: With dead ends: 1318 [2019-09-09 19:09:35,513 INFO L226 Difference]: Without dead ends: 1318 [2019-09-09 19:09:35,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 19:09:35,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2019-09-09 19:09:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1315. [2019-09-09 19:09:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1315 states. [2019-09-09 19:09:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1928 transitions. [2019-09-09 19:09:35,577 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1928 transitions. Word has length 92 [2019-09-09 19:09:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:09:35,578 INFO L475 AbstractCegarLoop]: Abstraction has 1315 states and 1928 transitions. [2019-09-09 19:09:35,578 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 19:09:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1928 transitions. [2019-09-09 19:09:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-09 19:09:35,581 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:09:35,582 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 19:09:35,582 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:09:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:09:35,583 INFO L82 PathProgramCache]: Analyzing trace with hash 317241164, now seen corresponding path program 1 times [2019-09-09 19:09:35,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:09:35,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:09:35,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:09:35,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:09:35,585 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:09:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:09:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:09:35,704 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:09:35,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 19:09:35,705 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:09:35,705 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 19:09:35,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 19:09:35,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 19:09:35,706 INFO L87 Difference]: Start difference. First operand 1315 states and 1928 transitions. Second operand 5 states. [2019-09-09 19:09:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:09:41,317 INFO L93 Difference]: Finished difference Result 2618 states and 3439 transitions. [2019-09-09 19:09:41,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 19:09:41,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-09-09 19:09:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:09:41,338 INFO L225 Difference]: With dead ends: 2618 [2019-09-09 19:09:41,339 INFO L226 Difference]: Without dead ends: 2618 [2019-09-09 19:09:41,343 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 19:09:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2019-09-09 19:09:41,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2584. [2019-09-09 19:09:41,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2584 states. [2019-09-09 19:09:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 3371 transitions. [2019-09-09 19:09:41,440 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 3371 transitions. Word has length 109 [2019-09-09 19:09:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:09:41,441 INFO L475 AbstractCegarLoop]: Abstraction has 2584 states and 3371 transitions. [2019-09-09 19:09:41,441 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 19:09:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 3371 transitions. [2019-09-09 19:09:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-09-09 19:09:41,453 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:09:41,453 INFO L399 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:09:41,453 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:09:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:09:41,454 INFO L82 PathProgramCache]: Analyzing trace with hash 993341937, now seen corresponding path program 1 times [2019-09-09 19:09:41,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:09:41,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:09:41,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:09:41,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:09:41,456 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:09:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:09:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 19:09:41,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:09:41,918 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:09:41,919 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 298 with the following transitions: [2019-09-09 19:09:41,922 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:09:41,992 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:09:41,993 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:09:57,067 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:10:09,594 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:10:09,597 INFO L272 AbstractInterpreter]: Visited 281 different actions 557 times. Merged at 4 different actions 5 times. Never widened. Performed 1188 root evaluator evaluations with a maximum evaluation depth of 14. Performed 1188 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:10:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:10:09,609 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:10:19,656 INFO L227 lantSequenceWeakener]: Weakened 294 states. On average, predicates are now at 77.32% of their original sizes. [2019-09-09 19:10:19,657 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:10:19,916 INFO L420 sIntCurrentIteration]: We unified 296 AI predicates to 296 [2019-09-09 19:10:19,916 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:10:19,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:10:19,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [5] total 21 [2019-09-09 19:10:19,918 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:10:19,919 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-09 19:10:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-09 19:10:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-09-09 19:10:19,920 INFO L87 Difference]: Start difference. First operand 2584 states and 3371 transitions. Second operand 18 states.