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/float-benchs/zonotope_3.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:39:47,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:39:47,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:39:47,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 01:39:47,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 01:39:47,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 01:39:47,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 01:39:47,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 01:39:47,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 01:39:47,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 01:39:47,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 01:39:47,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 01:39:47,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 01:39:47,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 01:39:47,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 01:39:47,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 01:39:47,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 01:39:47,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 01:39:47,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 01:39:47,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 01:39:47,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 01:39:47,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 01:39:47,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 01:39:47,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 01:39:47,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-10 01:39:47,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-10 01:39:47,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-10 01:39:47,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-10 01:39:47,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-10 01:39:47,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-10 01:39:47,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 01:39:47,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 01:39:47,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 01:39:47,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 01:39:47,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 01:39:47,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 01:39:47,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 01:39:47,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 01:39:47,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:39:47,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:39:47,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:39:47,421 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 [2019-09-10 01:39:47,445 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:39:47,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:39:47,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:39:47,446 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:39:47,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:39:47,447 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:39:47,447 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:39:47,447 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:39:47,448 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:39:47,448 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:39:47,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:39:47,449 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:39:47,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:39:47,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:39:47,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:39:47,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:39:47,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:39:47,450 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:39:47,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:39:47,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:39:47,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:39:47,451 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:39:47,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:39:47,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:39:47,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:39:47,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:39:47,452 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:39:47,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:39:47,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:39:47,452 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:39:47,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:39:47,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:39:47,496 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:39:47,497 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:39:47,498 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:39:47,498 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2019-09-10 01:39:47,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8aeac800/95141eecdc894cc49285f742e35db7e2/FLAGddc1fd209 [2019-09-10 01:39:48,026 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:39:48,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2019-09-10 01:39:48,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8aeac800/95141eecdc894cc49285f742e35db7e2/FLAGddc1fd209 [2019-09-10 01:39:48,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8aeac800/95141eecdc894cc49285f742e35db7e2 [2019-09-10 01:39:48,396 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:39:48,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:39:48,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:39:48,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:39:48,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:39:48,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:39:48" (1/1) ... [2019-09-10 01:39:48,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb34f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48, skipping insertion in model container [2019-09-10 01:39:48,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:39:48" (1/1) ... [2019-09-10 01:39:48,414 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:39:48,444 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:39:48,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:39:48,657 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:39:48,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:39:48,696 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:39:48,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48 WrapperNode [2019-09-10 01:39:48,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:39:48,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:39:48,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:39:48,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:39:48,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48" (1/1) ... [2019-09-10 01:39:48,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48" (1/1) ... [2019-09-10 01:39:48,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48" (1/1) ... [2019-09-10 01:39:48,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48" (1/1) ... [2019-09-10 01:39:48,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48" (1/1) ... [2019-09-10 01:39:48,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48" (1/1) ... [2019-09-10 01:39:48,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48" (1/1) ... [2019-09-10 01:39:48,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:39:48,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:39:48,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:39:48,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:39:48,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48" (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 [2019-09-10 01:39:48,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:39:48,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:39:48,877 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:39:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:39:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2019-09-10 01:39:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 01:39:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 01:39:48,878 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-09-10 01:39:48,878 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-09-10 01:39:48,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:39:48,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:39:48,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:39:49,185 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:39:49,186 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 01:39:49,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:39:49 BoogieIcfgContainer [2019-09-10 01:39:49,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:39:49,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:39:49,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:39:49,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:39:49,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:39:48" (1/3) ... [2019-09-10 01:39:49,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd96b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:39:49, skipping insertion in model container [2019-09-10 01:39:49,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:39:48" (2/3) ... [2019-09-10 01:39:49,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd96b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:39:49, skipping insertion in model container [2019-09-10 01:39:49,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:39:49" (3/3) ... [2019-09-10 01:39:49,194 INFO L109 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2019-09-10 01:39:49,203 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:39:49,217 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:39:49,229 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:39:49,253 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:39:49,254 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:39:49,254 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:39:49,254 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:39:49,254 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:39:49,254 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:39:49,255 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:39:49,255 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:39:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-10 01:39:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-10 01:39:49,275 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:39:49,276 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:39:49,277 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:39:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:49,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1089057176, now seen corresponding path program 1 times [2019-09-10 01:39:49,284 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:39:49,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:49,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:39:49,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:49,322 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:39:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:39:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:49,449 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:39:49,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 01:39:49,450 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:39:49,454 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 01:39:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 01:39:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:39:49,468 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-09-10 01:39:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:39:49,538 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2019-09-10 01:39:49,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 01:39:49,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-09-10 01:39:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:39:49,550 INFO L225 Difference]: With dead ends: 29 [2019-09-10 01:39:49,550 INFO L226 Difference]: Without dead ends: 23 [2019-09-10 01:39:49,552 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:39:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-10 01:39:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2019-09-10 01:39:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-10 01:39:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-09-10 01:39:49,584 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2019-09-10 01:39:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:39:49,585 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-09-10 01:39:49,585 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 01:39:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-09-10 01:39:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-10 01:39:49,587 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:39:49,587 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:39:49,590 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:39:49,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:49,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1091320956, now seen corresponding path program 1 times [2019-09-10 01:39:49,591 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:39:49,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:49,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:39:49,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:49,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:39:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:39:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:49,683 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:39:49,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 01:39:49,684 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:39:49,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 01:39:49,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 01:39:49,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:39:49,687 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2019-09-10 01:39:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:39:49,701 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-09-10 01:39:49,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 01:39:49,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-10 01:39:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:39:49,703 INFO L225 Difference]: With dead ends: 20 [2019-09-10 01:39:49,703 INFO L226 Difference]: Without dead ends: 18 [2019-09-10 01:39:49,704 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:39:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-10 01:39:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-10 01:39:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-10 01:39:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-09-10 01:39:49,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2019-09-10 01:39:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:39:49,708 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-09-10 01:39:49,708 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 01:39:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-09-10 01:39:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-10 01:39:49,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:39:49,710 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:39:49,710 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:39:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash -62186081, now seen corresponding path program 1 times [2019-09-10 01:39:49,711 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:39:49,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:49,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:39:49,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:49,712 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:39:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:39:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:49,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:39:49,769 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:39:49,770 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-10 01:39:49,772 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [15], [19], [28], [31], [34], [36], [39], [40], [50], [51], [52] [2019-09-10 01:39:49,808 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:39:49,808 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:39:49,982 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 01:39:49,988 INFO L272 AbstractInterpreter]: Visited 15 different actions 47 times. Merged at 4 different actions 25 times. Widened at 2 different actions 5 times. Performed 570 root evaluator evaluations with a maximum evaluation depth of 3. Performed 570 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 47 variables. [2019-09-10 01:39:49,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:49,991 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 01:39:50,048 INFO L227 lantSequenceWeakener]: Weakened 13 states. On average, predicates are now at 95.91% of their original sizes. [2019-09-10 01:39:50,050 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 01:39:50,136 INFO L420 sIntCurrentIteration]: We unified 15 AI predicates to 15 [2019-09-10 01:39:50,137 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 01:39:50,137 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:39:50,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2019-09-10 01:39:50,138 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:39:50,139 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-10 01:39:50,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-10 01:39:50,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:39:50,140 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 10 states. [2019-09-10 01:39:50,347 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:39:50,375 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:39:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:39:50,428 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-10 01:39:50,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 01:39:50,429 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-09-10 01:39:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:39:50,430 INFO L225 Difference]: With dead ends: 25 [2019-09-10 01:39:50,430 INFO L226 Difference]: Without dead ends: 23 [2019-09-10 01:39:50,431 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-09-10 01:39:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-10 01:39:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-09-10 01:39:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-10 01:39:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-10 01:39:50,435 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2019-09-10 01:39:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:39:50,435 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-10 01:39:50,436 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-10 01:39:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-10 01:39:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-10 01:39:50,437 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:39:50,437 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:39:50,437 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:39:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:50,438 INFO L82 PathProgramCache]: Analyzing trace with hash -47082044, now seen corresponding path program 1 times [2019-09-10 01:39:50,438 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:39:50,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:50,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:39:50,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:50,440 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:39:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:39:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:50,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:39:50,520 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:39:50,521 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-10 01:39:50,521 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [15], [19], [28], [36], [39], [40], [45], [47], [50], [51], [52] [2019-09-10 01:39:50,523 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:39:50,523 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:39:50,556 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:39:50,565 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:39:50,566 INFO L272 AbstractInterpreter]: Visited 16 different actions 56 times. Merged at 10 different actions 34 times. Widened at 2 different actions 6 times. Performed 637 root evaluator evaluations with a maximum evaluation depth of 3. Performed 637 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 47 variables. [2019-09-10 01:39:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:50,567 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:39:50,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:39:50,568 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:39:50,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:39:50,588 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:39:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:39:50,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-10 01:39:50,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:39:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:50,669 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:39:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:50,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:39:50,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2019-09-10 01:39:50,713 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:39:50,713 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:39:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:39:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-10 01:39:50,714 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-09-10 01:39:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:39:50,748 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-09-10 01:39:50,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:39:50,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-09-10 01:39:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:39:50,750 INFO L225 Difference]: With dead ends: 25 [2019-09-10 01:39:50,750 INFO L226 Difference]: Without dead ends: 25 [2019-09-10 01:39:50,751 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-10 01:39:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-10 01:39:50,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-09-10 01:39:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-10 01:39:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-09-10 01:39:50,755 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2019-09-10 01:39:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:39:50,755 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-09-10 01:39:50,756 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:39:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-09-10 01:39:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-10 01:39:50,756 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:39:50,757 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:39:50,757 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:39:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:50,757 INFO L82 PathProgramCache]: Analyzing trace with hash 308258379, now seen corresponding path program 2 times [2019-09-10 01:39:50,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:39:50,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:50,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:39:50,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:50,759 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:39:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:39:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:50,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:39:50,850 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:39:50,851 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:39:50,851 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:39:50,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:39:50,851 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:39:50,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:39:50,868 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:39:50,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:39:50,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:39:50,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 01:39:50,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:39:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 01:39:50,951 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:39:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 01:39:50,996 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:39:50,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 9 [2019-09-10 01:39:50,996 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:39:50,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:39:50,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:39:50,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-09-10 01:39:50,997 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2019-09-10 01:39:51,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:39:51,015 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-10 01:39:51,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:39:51,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-09-10 01:39:51,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:39:51,017 INFO L225 Difference]: With dead ends: 22 [2019-09-10 01:39:51,017 INFO L226 Difference]: Without dead ends: 22 [2019-09-10 01:39:51,017 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:39:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-10 01:39:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-10 01:39:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-10 01:39:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-10 01:39:51,021 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-09-10 01:39:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:39:51,021 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-10 01:39:51,021 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:39:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-10 01:39:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-10 01:39:51,022 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:39:51,022 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:39:51,023 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:39:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:51,023 INFO L82 PathProgramCache]: Analyzing trace with hash 506426944, now seen corresponding path program 1 times [2019-09-10 01:39:51,023 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:39:51,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:51,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:39:51,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:51,024 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:39:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:39:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:51,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:39:51,076 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:39:51,076 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2019-09-10 01:39:51,077 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [15], [19], [28], [31], [36], [39], [40], [43], [45], [50], [51], [52] [2019-09-10 01:39:51,079 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:39:51,079 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:39:51,111 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:39:51,112 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:39:51,113 INFO L272 AbstractInterpreter]: Visited 17 different actions 49 times. Merged at 4 different actions 25 times. Widened at 2 different actions 5 times. Performed 571 root evaluator evaluations with a maximum evaluation depth of 3. Performed 571 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 47 variables. [2019-09-10 01:39:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:51,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:39:51,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:39:51,113 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:39:51,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:39:51,128 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:39:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:39:51,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-10 01:39:51,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:39:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:51,175 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:39:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:51,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:39:51,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2019-09-10 01:39:51,209 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:39:51,209 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 01:39:51,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 01:39:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:39:51,210 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 5 states. [2019-09-10 01:39:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:39:51,246 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-10 01:39:51,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:39:51,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-09-10 01:39:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:39:51,247 INFO L225 Difference]: With dead ends: 29 [2019-09-10 01:39:51,248 INFO L226 Difference]: Without dead ends: 29 [2019-09-10 01:39:51,248 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:39:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-10 01:39:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-09-10 01:39:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-10 01:39:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-10 01:39:51,252 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2019-09-10 01:39:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:39:51,252 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-10 01:39:51,253 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 01:39:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-10 01:39:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-10 01:39:51,254 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:39:51,254 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:39:51,254 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:39:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:39:51,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1235853849, now seen corresponding path program 2 times [2019-09-10 01:39:51,255 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:39:51,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:51,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:39:51,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:39:51,256 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:39:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:39:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:39:51,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:39:51,323 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:39:51,324 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:39:51,324 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:39:51,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:39:51,324 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:39:51,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:39:51,346 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:39:51,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:39:51,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:39:51,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 01:39:51,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:39:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-10 01:39:51,418 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:39:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-10 01:39:51,457 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:39:51,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2019-09-10 01:39:51,458 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:39:51,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:39:51,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:39:51,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:39:51,459 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 4 states. [2019-09-10 01:39:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:39:51,476 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-10 01:39:51,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:39:51,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-09-10 01:39:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:39:51,477 INFO L225 Difference]: With dead ends: 21 [2019-09-10 01:39:51,477 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:39:51,477 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-09-10 01:39:51,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:39:51,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:39:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:39:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:39:51,478 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2019-09-10 01:39:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:39:51,479 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:39:51,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:39:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:39:51,479 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:39:51,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:39:51 BoogieIcfgContainer [2019-09-10 01:39:51,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:39:51,487 INFO L168 Benchmark]: Toolchain (without parser) took 3088.32 ms. Allocated memory was 133.7 MB in the beginning and 227.0 MB in the end (delta: 93.3 MB). Free memory was 90.0 MB in the beginning and 79.0 MB in the end (delta: 11.0 MB). Peak memory consumption was 104.3 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:51,488 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory is still 107.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-10 01:39:51,488 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.90 ms. Allocated memory is still 133.7 MB. Free memory was 90.0 MB in the beginning and 79.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:51,489 INFO L168 Benchmark]: Boogie Preprocessor took 131.21 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 79.2 MB in the beginning and 176.8 MB in the end (delta: -97.7 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:51,490 INFO L168 Benchmark]: RCFGBuilder took 358.51 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 161.3 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:51,491 INFO L168 Benchmark]: TraceAbstraction took 2296.68 ms. Allocated memory was 200.8 MB in the beginning and 227.0 MB in the end (delta: 26.2 MB). Free memory was 161.3 MB in the beginning and 79.0 MB in the end (delta: 82.4 MB). Peak memory consumption was 108.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:39:51,495 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory is still 107.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.90 ms. Allocated memory is still 133.7 MB. Free memory was 90.0 MB in the beginning and 79.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.21 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 79.2 MB in the beginning and 176.8 MB in the end (delta: -97.7 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.51 ms. Allocated memory is still 200.8 MB. Free memory was 176.8 MB in the beginning and 161.3 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2296.68 ms. Allocated memory was 200.8 MB in the beginning and 227.0 MB in the end (delta: 26.2 MB). Free memory was 161.3 MB in the beginning and 79.0 MB in the end (delta: 82.4 MB). Peak memory consumption was 108.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 139]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. SAFE Result, 2.2s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 113 SDtfs, 89 SDslu, 201 SDs, 0 SdLazy, 59 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 3 AbstIntIterations, 1 AbstIntStrong, 0.8772801054669799 AbsIntWeakeningRatio, 3.466666666666667 AbsIntAvgWeakeningVarsNumRemoved, 20.666666666666668 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 208 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 275 ConstructedInterpolants, 0 QuantifiedInterpolants, 8739 SizeOfPredicates, 24 NumberOfNonLiveVariables, 778 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 43/86 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...