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_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:59:28,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:59:28,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:59:28,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 18:59:28,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 18:59:28,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 18:59:28,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 18:59:28,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 18:59:28,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 18:59:28,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 18:59:28,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 18:59:28,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 18:59:28,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:59:28,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:59:28,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:59:28,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:59:28,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:59:28,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:59:28,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:59:28,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:59:28,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:59:28,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:59:28,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:59:28,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:59:28,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 18:59:28,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:59:28,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:59:28,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:59:28,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:59:28,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:59:28,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:59:28,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:59:28,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:59:28,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:59:28,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:59:28,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:59:28,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 18:59:28,363 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:59:28,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:59:28,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:59:28,364 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:59:28,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:59:28,365 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:59:28,365 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:59:28,365 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:59:28,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:59:28,365 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:59:28,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:59:28,366 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:59:28,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:59:28,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:59:28,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:59:28,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:59:28,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:59:28,367 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:59:28,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:59:28,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:59:28,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:59:28,368 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:59:28,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:59:28,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:59:28,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:59:28,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:59:28,369 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:59:28,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:59:28,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:59:28,370 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:59:28,398 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:59:28,410 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:59:28,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:59:28,415 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:59:28,415 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:59:28,416 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label16.c [2019-09-09 18:59:28,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b66d5b12/5b6dbb3a446e4305871f5fc55b6ef7c7/FLAG59a2c7994 [2019-09-09 18:59:29,081 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:59:29,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label16.c [2019-09-09 18:59:29,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b66d5b12/5b6dbb3a446e4305871f5fc55b6ef7c7/FLAG59a2c7994 [2019-09-09 18:59:29,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b66d5b12/5b6dbb3a446e4305871f5fc55b6ef7c7 [2019-09-09 18:59:29,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:59:29,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:59:29,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:59:29,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:59:29,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:59:29,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:59:29" (1/1) ... [2019-09-09 18:59:29,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277c7fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:29, skipping insertion in model container [2019-09-09 18:59:29,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:59:29" (1/1) ... [2019-09-09 18:59:29,320 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:59:29,393 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:59:30,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:59:30,281 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:59:30,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:59:30,780 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:59:30,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30 WrapperNode [2019-09-09 18:59:30,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:59:30,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:59:30,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:59:30,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:59:30,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30" (1/1) ... [2019-09-09 18:59:30,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30" (1/1) ... [2019-09-09 18:59:30,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30" (1/1) ... [2019-09-09 18:59:30,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30" (1/1) ... [2019-09-09 18:59:30,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30" (1/1) ... [2019-09-09 18:59:30,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30" (1/1) ... [2019-09-09 18:59:30,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30" (1/1) ... [2019-09-09 18:59:31,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:59:31,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:59:31,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:59:31,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:59:31,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:59:31,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:59:31,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:59:31,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:59:31,077 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 18:59:31,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:59:31,077 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:59:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 18:59:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:59:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:59:31,078 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:59:31,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:59:31,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:59:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:59:35,521 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:59:35,521 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:59:35,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:59:35 BoogieIcfgContainer [2019-09-09 18:59:35,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:59:35,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:59:35,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:59:35,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:59:35,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:59:29" (1/3) ... [2019-09-09 18:59:35,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1667a916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:59:35, skipping insertion in model container [2019-09-09 18:59:35,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:59:30" (2/3) ... [2019-09-09 18:59:35,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1667a916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:59:35, skipping insertion in model container [2019-09-09 18:59:35,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:59:35" (3/3) ... [2019-09-09 18:59:35,568 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label16.c [2019-09-09 18:59:35,578 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:59:35,587 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:59:35,604 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:59:35,635 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:59:35,635 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:59:35,635 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:59:35,635 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:59:35,635 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:59:35,636 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:59:35,636 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:59:35,636 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:59:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 18:59:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-09 18:59:35,701 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:59:35,702 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] [2019-09-09 18:59:35,704 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:59:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:59:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash -50532616, now seen corresponding path program 1 times [2019-09-09 18:59:35,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:59:35,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:59:35,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:59:35,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:59:35,765 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:59:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:59:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:59:36,051 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:59:36,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:59:36,052 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:59:36,057 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:59:36,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:59:36,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:59:36,075 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 3 states. [2019-09-09 18:59:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:59:38,959 INFO L93 Difference]: Finished difference Result 759 states and 1261 transitions. [2019-09-09 18:59:38,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:59:38,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2019-09-09 18:59:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:59:38,995 INFO L225 Difference]: With dead ends: 759 [2019-09-09 18:59:38,995 INFO L226 Difference]: Without dead ends: 691 [2019-09-09 18:59:38,997 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 18:59:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2019-09-09 18:59:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2019-09-09 18:59:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-09-09 18:59:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1144 transitions. [2019-09-09 18:59:39,094 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1144 transitions. Word has length 68 [2019-09-09 18:59:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:59:39,095 INFO L475 AbstractCegarLoop]: Abstraction has 691 states and 1144 transitions. [2019-09-09 18:59:39,095 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:59:39,095 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1144 transitions. [2019-09-09 18:59:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-09 18:59:39,103 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:59:39,103 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 18:59:39,103 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:59:39,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:59:39,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1241011711, now seen corresponding path program 1 times [2019-09-09 18:59:39,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:59:39,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:59:39,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:59:39,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:59:39,106 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:59:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:59:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:59:39,375 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:59:39,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 18:59:39,375 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:59:39,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 18:59:39,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 18:59:39,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 18:59:39,378 INFO L87 Difference]: Start difference. First operand 691 states and 1144 transitions. Second operand 5 states. [2019-09-09 18:59:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:59:43,691 INFO L93 Difference]: Finished difference Result 1372 states and 2137 transitions. [2019-09-09 18:59:43,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 18:59:43,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-09-09 18:59:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:59:43,700 INFO L225 Difference]: With dead ends: 1372 [2019-09-09 18:59:43,700 INFO L226 Difference]: Without dead ends: 1372 [2019-09-09 18:59:43,701 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 18:59:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2019-09-09 18:59:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1345. [2019-09-09 18:59:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-09-09 18:59:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2091 transitions. [2019-09-09 18:59:43,782 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2091 transitions. Word has length 147 [2019-09-09 18:59:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:59:43,785 INFO L475 AbstractCegarLoop]: Abstraction has 1345 states and 2091 transitions. [2019-09-09 18:59:43,785 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 18:59:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2091 transitions. [2019-09-09 18:59:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-09 18:59:43,798 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:59:43,799 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 18:59:43,799 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:59:43,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:59:43,800 INFO L82 PathProgramCache]: Analyzing trace with hash -428645511, now seen corresponding path program 1 times [2019-09-09 18:59:43,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:59:43,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:59:43,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:59:43,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:59:43,802 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:59:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:59:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:59:44,056 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:59:44,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:59:44,056 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:59:44,057 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:59:44,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:59:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:59:44,058 INFO L87 Difference]: Start difference. First operand 1345 states and 2091 transitions. Second operand 6 states. [2019-09-09 18:59:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:59:47,845 INFO L93 Difference]: Finished difference Result 2357 states and 3321 transitions. [2019-09-09 18:59:47,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 18:59:47,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2019-09-09 18:59:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:59:47,859 INFO L225 Difference]: With dead ends: 2357 [2019-09-09 18:59:47,860 INFO L226 Difference]: Without dead ends: 2357 [2019-09-09 18:59:47,860 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-09 18:59:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-09-09 18:59:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2309. [2019-09-09 18:59:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2019-09-09 18:59:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3224 transitions. [2019-09-09 18:59:47,948 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3224 transitions. Word has length 151 [2019-09-09 18:59:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:59:47,950 INFO L475 AbstractCegarLoop]: Abstraction has 2309 states and 3224 transitions. [2019-09-09 18:59:47,950 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:59:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3224 transitions. [2019-09-09 18:59:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-09-09 18:59:47,955 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:59:47,955 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-09-09 18:59:47,956 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:59:47,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:59:47,956 INFO L82 PathProgramCache]: Analyzing trace with hash 836754837, now seen corresponding path program 1 times [2019-09-09 18:59:47,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:59:47,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:59:47,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:59:47,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:59:47,958 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:59:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:59:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 123 proven. 63 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 18:59:48,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:59:48,241 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:59:48,242 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 221 with the following transitions: [2019-09-09 18:59:48,246 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [489], [497], [505], [513], [521], [525], [527], [530], [538], [546], [554], [562], [566], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 18:59:48,330 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:59:48,330 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:59:50,203 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:59:50,205 INFO L272 AbstractInterpreter]: Visited 88 different actions 88 times. Never merged. Never widened. Performed 215 root evaluator evaluations with a maximum evaluation depth of 13. Performed 215 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:59:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:59:50,210 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:59:51,933 INFO L227 lantSequenceWeakener]: Weakened 201 states. On average, predicates are now at 78.55% of their original sizes. [2019-09-09 18:59:51,933 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:59:52,010 INFO L420 sIntCurrentIteration]: We unified 219 AI predicates to 219 [2019-09-09 18:59:52,010 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:59:52,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:59:52,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:59:52,011 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:59:52,012 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:59:52,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:59:52,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:59:52,013 INFO L87 Difference]: Start difference. First operand 2309 states and 3224 transitions. Second operand 10 states. [2019-09-09 18:59:59,875 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:10:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:10:05,057 INFO L93 Difference]: Finished difference Result 2620 states and 3548 transitions. [2019-09-09 19:10:05,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 19:10:05,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 220 [2019-09-09 19:10:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:10:05,070 INFO L225 Difference]: With dead ends: 2620 [2019-09-09 19:10:05,070 INFO L226 Difference]: Without dead ends: 2620 [2019-09-09 19:10:05,071 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-09-09 19:10:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2019-09-09 19:10:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2616. [2019-09-09 19:10:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2616 states. [2019-09-09 19:10:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 3540 transitions. [2019-09-09 19:10:05,127 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 3540 transitions. Word has length 220 [2019-09-09 19:10:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:10:05,128 INFO L475 AbstractCegarLoop]: Abstraction has 2616 states and 3540 transitions. [2019-09-09 19:10:05,128 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 19:10:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 3540 transitions. [2019-09-09 19:10:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-09-09 19:10:05,132 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:10:05,133 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:10:05,133 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:10:05,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:10:05,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1655313687, now seen corresponding path program 1 times [2019-09-09 19:10:05,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:10:05,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:10:05,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:10:05,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:10:05,135 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:10:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:10:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 123 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 19:10:05,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:10:05,374 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:10:05,374 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 247 with the following transitions: [2019-09-09 19:10:05,375 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [489], [497], [505], [513], [521], [525], [527], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:10:05,388 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:10:05,388 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:10:07,003 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:10:08,068 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:10:08,069 INFO L272 AbstractInterpreter]: Visited 103 different actions 201 times. Merged at 4 different actions 5 times. Never widened. Performed 452 root evaluator evaluations with a maximum evaluation depth of 13. Performed 452 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:10:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:10:08,070 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:10:09,134 INFO L227 lantSequenceWeakener]: Weakened 243 states. On average, predicates are now at 78.2% of their original sizes. [2019-09-09 19:10:09,135 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:10:09,224 INFO L420 sIntCurrentIteration]: We unified 245 AI predicates to 245 [2019-09-09 19:10:09,224 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:10:09,224 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:10:09,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 19:10:09,225 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:10:09,225 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:10:09,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:10:09,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:10:09,226 INFO L87 Difference]: Start difference. First operand 2616 states and 3540 transitions. Second operand 11 states.