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/Problem14_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:00:59,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:00:59,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:00:59,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:00:59,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:00:59,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:00:59,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:00:59,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:00:59,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:00:59,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:00:59,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:00:59,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:00:59,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:00:59,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:00:59,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:00:59,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:00:59,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 18:00:59,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:00:59,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:00:59,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:00:59,286 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 18:00:59,307 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:00:59,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:00:59,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:00:59,309 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:00:59,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:00:59,310 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:00:59,310 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:00:59,310 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:00:59,310 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:00:59,311 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:00:59,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:00:59,313 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:00:59,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:00:59,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:00:59,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:00:59,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:00:59,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:00:59,314 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:00:59,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:00:59,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:00:59,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:00:59,315 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:00:59,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:00:59,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:00:59,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:00:59,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:00:59,316 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:00:59,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:00:59,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:00:59,317 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:00:59,363 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:00:59,375 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:00:59,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:00:59,380 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:00:59,381 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:00:59,382 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label06.c [2019-09-09 18:00:59,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59d9fc652/777d869f48b641c69569a87a738123ca/FLAGc0e270328 [2019-09-09 18:01:00,054 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:01:00,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label06.c [2019-09-09 18:01:00,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59d9fc652/777d869f48b641c69569a87a738123ca/FLAGc0e270328 [2019-09-09 18:01:00,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59d9fc652/777d869f48b641c69569a87a738123ca [2019-09-09 18:01:00,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:01:00,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:01:00,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:01:00,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:01:00,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:01:00,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:01:00" (1/1) ... [2019-09-09 18:01:00,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab5b6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:00, skipping insertion in model container [2019-09-09 18:01:00,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:01:00" (1/1) ... [2019-09-09 18:01:00,334 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:01:00,408 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:01:01,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:01:01,057 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:01:01,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:01:01,269 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:01:01,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01 WrapperNode [2019-09-09 18:01:01,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:01:01,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:01:01,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:01:01,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:01:01,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01" (1/1) ... [2019-09-09 18:01:01,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01" (1/1) ... [2019-09-09 18:01:01,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01" (1/1) ... [2019-09-09 18:01:01,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01" (1/1) ... [2019-09-09 18:01:01,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01" (1/1) ... [2019-09-09 18:01:01,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01" (1/1) ... [2019-09-09 18:01:01,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01" (1/1) ... [2019-09-09 18:01:01,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:01:01,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:01:01,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:01:01,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:01:01,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01" (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 18:01:01,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:01:01,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:01:01,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:01:01,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:01:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:01:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:01:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:01:01,594 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:01:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:01:01,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:01:01,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:01:03,209 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:01:03,209 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:01:03,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:01:03 BoogieIcfgContainer [2019-09-09 18:01:03,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:01:03,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:01:03,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:01:03,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:01:03,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:01:00" (1/3) ... [2019-09-09 18:01:03,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2583761b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:01:03, skipping insertion in model container [2019-09-09 18:01:03,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:01:01" (2/3) ... [2019-09-09 18:01:03,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2583761b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:01:03, skipping insertion in model container [2019-09-09 18:01:03,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:01:03" (3/3) ... [2019-09-09 18:01:03,220 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label06.c [2019-09-09 18:01:03,233 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:01:03,243 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:01:03,260 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:01:03,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:01:03,288 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:01:03,288 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:01:03,289 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:01:03,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:01:03,289 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:01:03,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:01:03,290 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:01:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-09-09 18:01:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-09 18:01:03,341 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:01:03,342 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] [2019-09-09 18:01:03,344 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:01:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:01:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1258864990, now seen corresponding path program 1 times [2019-09-09 18:01:03,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:01:03,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:03,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:01:03,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:03,407 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:01:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:01:03,762 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 18:01:03,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:01:03,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:01:03,765 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:01:03,771 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:01:03,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:01:03,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:01:03,790 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-09-09 18:01:05,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:01:05,748 INFO L93 Difference]: Finished difference Result 642 states and 849 transitions. [2019-09-09 18:01:05,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:01:05,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2019-09-09 18:01:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:01:05,777 INFO L225 Difference]: With dead ends: 642 [2019-09-09 18:01:05,777 INFO L226 Difference]: Without dead ends: 554 [2019-09-09 18:01:05,782 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 18:01:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-09-09 18:01:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 372. [2019-09-09 18:01:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-09-09 18:01:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-09-09 18:01:05,853 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 67 [2019-09-09 18:01:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:01:05,854 INFO L475 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-09-09 18:01:05,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:01:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-09-09 18:01:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-09 18:01:05,862 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:01:05,862 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:05,862 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:01:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:01:05,863 INFO L82 PathProgramCache]: Analyzing trace with hash -744258219, now seen corresponding path program 1 times [2019-09-09 18:01:05,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:01:05,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:05,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:01:05,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:05,865 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:01:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:01:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:01:06,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:01:06,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:01:06,062 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:01:06,064 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:01:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:01:06,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:01:06,065 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 4 states. [2019-09-09 18:01:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:01:07,692 INFO L93 Difference]: Finished difference Result 918 states and 1267 transitions. [2019-09-09 18:01:07,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:01:07,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 150 [2019-09-09 18:01:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:01:07,705 INFO L225 Difference]: With dead ends: 918 [2019-09-09 18:01:07,705 INFO L226 Difference]: Without dead ends: 918 [2019-09-09 18:01:07,706 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:01:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2019-09-09 18:01:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 918. [2019-09-09 18:01:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2019-09-09 18:01:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1267 transitions. [2019-09-09 18:01:07,755 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1267 transitions. Word has length 150 [2019-09-09 18:01:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:01:07,756 INFO L475 AbstractCegarLoop]: Abstraction has 918 states and 1267 transitions. [2019-09-09 18:01:07,756 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:01:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1267 transitions. [2019-09-09 18:01:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-09 18:01:07,763 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:01:07,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:07,764 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:01:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:01:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash -576457814, now seen corresponding path program 1 times [2019-09-09 18:01:07,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:01:07,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:07,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:01:07,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:07,766 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:01:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:01:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:01:08,078 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:01:08,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 18:01:08,079 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:01:08,082 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 18:01:08,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 18:01:08,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 18:01:08,083 INFO L87 Difference]: Start difference. First operand 918 states and 1267 transitions. Second operand 6 states. [2019-09-09 18:01:09,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:01:09,412 INFO L93 Difference]: Finished difference Result 1692 states and 2312 transitions. [2019-09-09 18:01:09,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 18:01:09,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 207 [2019-09-09 18:01:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:01:09,425 INFO L225 Difference]: With dead ends: 1692 [2019-09-09 18:01:09,426 INFO L226 Difference]: Without dead ends: 1692 [2019-09-09 18:01:09,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 18:01:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2019-09-09 18:01:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1670. [2019-09-09 18:01:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1670 states. [2019-09-09 18:01:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2239 transitions. [2019-09-09 18:01:09,485 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2239 transitions. Word has length 207 [2019-09-09 18:01:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:01:09,486 INFO L475 AbstractCegarLoop]: Abstraction has 1670 states and 2239 transitions. [2019-09-09 18:01:09,486 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 18:01:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2239 transitions. [2019-09-09 18:01:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-09-09 18:01:09,493 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:01:09,493 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:01:09,494 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:01:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:01:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 93311285, now seen corresponding path program 1 times [2019-09-09 18:01:09,494 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:01:09,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:09,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:01:09,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:01:09,496 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:01:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:01:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:01:09,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:01:09,707 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:01:09,708 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 239 with the following transitions: [2019-09-09 18:01:09,712 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [445], [447], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:01:09,808 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:01:09,808 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:01:15,001 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:01:15,002 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Performed 239 root evaluator evaluations with a maximum evaluation depth of 13. Performed 239 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 18:01:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:01:15,006 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:01:19,255 INFO L227 lantSequenceWeakener]: Weakened 219 states. On average, predicates are now at 78.42% of their original sizes. [2019-09-09 18:01:19,255 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:01:19,346 INFO L420 sIntCurrentIteration]: We unified 237 AI predicates to 237 [2019-09-09 18:01:19,346 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:01:19,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:01:19,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 18:01:19,347 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:01:19,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:01:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:01:19,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:01:19,349 INFO L87 Difference]: Start difference. First operand 1670 states and 2239 transitions. Second operand 10 states. [2019-09-09 18:02:39,874 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:05:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:05:33,777 INFO L93 Difference]: Finished difference Result 1856 states and 2436 transitions. [2019-09-09 18:05:33,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 18:05:33,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 238 [2019-09-09 18:05:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:05:33,787 INFO L225 Difference]: With dead ends: 1856 [2019-09-09 18:05:33,787 INFO L226 Difference]: Without dead ends: 1856 [2019-09-09 18:05:33,788 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-09-09 18:05:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2019-09-09 18:05:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1852. [2019-09-09 18:05:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1852 states. [2019-09-09 18:05:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2429 transitions. [2019-09-09 18:05:33,834 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2429 transitions. Word has length 238 [2019-09-09 18:05:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:05:33,835 INFO L475 AbstractCegarLoop]: Abstraction has 1852 states and 2429 transitions. [2019-09-09 18:05:33,835 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 18:05:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2429 transitions. [2019-09-09 18:05:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2019-09-09 18:05:33,842 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:05:33,842 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-09-09 18:05:33,843 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:05:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:05:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1164195299, now seen corresponding path program 1 times [2019-09-09 18:05:33,844 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:05:33,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:05:33,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:05:33,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:05:33,845 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:05:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:05:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 266 proven. 146 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:05:34,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:05:34,515 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:05:34,515 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 323 with the following transitions: [2019-09-09 18:05:34,516 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [445], [447], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:05:34,523 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:05:34,523 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:05:39,833 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:05:39,835 INFO L272 AbstractInterpreter]: Visited 104 different actions 203 times. Merged at 4 different actions 5 times. Never widened. Performed 433 root evaluator evaluations with a maximum evaluation depth of 13. Performed 433 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 18:05:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:05:39,835 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:05:42,522 INFO L227 lantSequenceWeakener]: Weakened 319 states. On average, predicates are now at 77.99% of their original sizes. [2019-09-09 18:05:42,523 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:05:42,630 INFO L420 sIntCurrentIteration]: We unified 321 AI predicates to 321 [2019-09-09 18:05:42,630 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:05:42,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:05:42,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-09-09 18:05:42,631 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:05:42,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:05:42,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:05:42,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:05:42,633 INFO L87 Difference]: Start difference. First operand 1852 states and 2429 transitions. Second operand 11 states. [2019-09-09 18:06:15,293 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:09:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:09:55,363 INFO L93 Difference]: Finished difference Result 2068 states and 2655 transitions. [2019-09-09 18:09:55,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-09 18:09:55,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 322 [2019-09-09 18:09:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:09:55,378 INFO L225 Difference]: With dead ends: 2068 [2019-09-09 18:09:55,378 INFO L226 Difference]: Without dead ends: 2068 [2019-09-09 18:09:55,379 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-09-09 18:09:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2019-09-09 18:09:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1852. [2019-09-09 18:09:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1852 states. [2019-09-09 18:09:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2428 transitions. [2019-09-09 18:09:55,441 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2428 transitions. Word has length 322 [2019-09-09 18:09:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:09:55,442 INFO L475 AbstractCegarLoop]: Abstraction has 1852 states and 2428 transitions. [2019-09-09 18:09:55,442 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:09:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2428 transitions. [2019-09-09 18:09:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2019-09-09 18:09:55,449 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:09:55,450 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 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 18:09:55,450 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:09:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:09:55,451 INFO L82 PathProgramCache]: Analyzing trace with hash 5062409, now seen corresponding path program 1 times [2019-09-09 18:09:55,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:09:55,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:09:55,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:09:55,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:09:55,452 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:09:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:09:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 277 proven. 146 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 18:09:56,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:09:56,420 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:09:56,420 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 349 with the following transitions: [2019-09-09 18:09:56,421 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [445], [447], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:09:56,425 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:09:56,425 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:10:10,141 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:10:10,141 INFO L272 AbstractInterpreter]: Visited 119 different actions 233 times. Merged at 4 different actions 5 times. Never widened. Performed 557 root evaluator evaluations with a maximum evaluation depth of 13. Performed 557 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 18:10:10,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:10:10,142 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:10:18,473 INFO L227 lantSequenceWeakener]: Weakened 345 states. On average, predicates are now at 77.93% of their original sizes. [2019-09-09 18:10:18,474 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:10:18,545 INFO L420 sIntCurrentIteration]: We unified 347 AI predicates to 347 [2019-09-09 18:10:18,545 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:10:18,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:10:18,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2019-09-09 18:10:18,546 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:10:18,546 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:10:18,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:10:18,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:10:18,547 INFO L87 Difference]: Start difference. First operand 1852 states and 2428 transitions. Second operand 11 states. [2019-09-09 18:11:00,211 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:13:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:13:10,574 INFO L93 Difference]: Finished difference Result 2220 states and 2811 transitions. [2019-09-09 18:13:10,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-09 18:13:10,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 348 [2019-09-09 18:13:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:13:10,584 INFO L225 Difference]: With dead ends: 2220 [2019-09-09 18:13:10,585 INFO L226 Difference]: Without dead ends: 2220 [2019-09-09 18:13:10,585 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-09-09 18:13:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2019-09-09 18:13:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2218. [2019-09-09 18:13:10,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2218 states. [2019-09-09 18:13:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 2809 transitions. [2019-09-09 18:13:10,630 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 2809 transitions. Word has length 348 [2019-09-09 18:13:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:13:10,630 INFO L475 AbstractCegarLoop]: Abstraction has 2218 states and 2809 transitions. [2019-09-09 18:13:10,630 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-09 18:13:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 2809 transitions. [2019-09-09 18:13:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2019-09-09 18:13:10,637 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:13:10,638 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:13:10,638 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:13:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:13:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash 374911621, now seen corresponding path program 1 times [2019-09-09 18:13:10,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:13:10,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:13:10,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:13:10,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:13:10,640 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:13:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:13:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 333 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-09-09 18:13:10,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:13:10,901 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:13:10,902 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 363 with the following transitions: [2019-09-09 18:13:10,902 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [445], [447], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-09-09 18:13:10,909 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:13:10,909 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:13:24,051 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:13:51,354 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:13:51,355 INFO L272 AbstractInterpreter]: Visited 119 different actions 579 times. Merged at 6 different actions 24 times. Never widened. Performed 1143 root evaluator evaluations with a maximum evaluation depth of 22. Performed 1143 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 5 fixpoints after 2 different actions. Largest state had 24 variables. [2019-09-09 18:13:51,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:13:51,356 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:13:58,900 INFO L227 lantSequenceWeakener]: Weakened 359 states. On average, predicates are now at 77.91% of their original sizes. [2019-09-09 18:13:58,900 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:13:58,967 INFO L420 sIntCurrentIteration]: We unified 361 AI predicates to 361 [2019-09-09 18:13:58,967 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:13:58,968 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:13:58,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-09-09 18:13:58,968 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:13:58,968 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 18:13:58,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 18:13:58,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-09 18:13:58,969 INFO L87 Difference]: Start difference. First operand 2218 states and 2809 transitions. Second operand 10 states.