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/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 07:51:01,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 07:51:01,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 07:51:01,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 07:51:01,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 07:51:01,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 07:51:01,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 07:51:01,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 07:51:01,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 07:51:01,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 07:51:01,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 07:51:01,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 07:51:01,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 07:51:01,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 07:51:01,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 07:51:01,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 07:51:01,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 07:51:01,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 07:51:01,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 07:51:01,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 07:51:01,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 07:51:01,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 07:51:01,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 07:51:01,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 07:51:01,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-10 07:51:01,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-10 07:51:01,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-10 07:51:01,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-10 07:51:01,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-10 07:51:01,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-10 07:51:01,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 07:51:01,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 07:51:01,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 07:51:01,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 07:51:01,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 07:51:01,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 07:51:01,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 07:51:01,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 07:51:01,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 07:51:01,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 07:51:01,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 07:51:01,367 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 07:51:01,381 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 07:51:01,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 07:51:01,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 07:51:01,382 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 07:51:01,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 07:51:01,383 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 07:51:01,383 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 07:51:01,384 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 07:51:01,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 07:51:01,384 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 07:51:01,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 07:51:01,385 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 07:51:01,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 07:51:01,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 07:51:01,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 07:51:01,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 07:51:01,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 07:51:01,386 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 07:51:01,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 07:51:01,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 07:51:01,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 07:51:01,387 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 07:51:01,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 07:51:01,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 07:51:01,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 07:51:01,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 07:51:01,388 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 07:51:01,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 07:51:01,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 07:51:01,389 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 07:51:01,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 07:51:01,438 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 07:51:01,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 07:51:01,445 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 07:51:01,445 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 07:51:01,446 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-09-10 07:51:01,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c8d46788/36e296edcbe84d56bc36a3d0293b292f/FLAG55c45d7b5 [2019-09-10 07:51:01,985 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 07:51:01,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-09-10 07:51:01,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c8d46788/36e296edcbe84d56bc36a3d0293b292f/FLAG55c45d7b5 [2019-09-10 07:51:02,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c8d46788/36e296edcbe84d56bc36a3d0293b292f [2019-09-10 07:51:02,365 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 07:51:02,367 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 07:51:02,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 07:51:02,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 07:51:02,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 07:51:02,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 07:51:02" (1/1) ... [2019-09-10 07:51:02,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f3c99dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02, skipping insertion in model container [2019-09-10 07:51:02,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 07:51:02" (1/1) ... [2019-09-10 07:51:02,384 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 07:51:02,437 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 07:51:02,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 07:51:02,802 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 07:51:02,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 07:51:02,879 INFO L192 MainTranslator]: Completed translation [2019-09-10 07:51:02,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02 WrapperNode [2019-09-10 07:51:02,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 07:51:02,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 07:51:02,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 07:51:02,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 07:51:02,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02" (1/1) ... [2019-09-10 07:51:02,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02" (1/1) ... [2019-09-10 07:51:02,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02" (1/1) ... [2019-09-10 07:51:02,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02" (1/1) ... [2019-09-10 07:51:02,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02" (1/1) ... [2019-09-10 07:51:02,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02" (1/1) ... [2019-09-10 07:51:02,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02" (1/1) ... [2019-09-10 07:51:02,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 07:51:02,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 07:51:02,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 07:51:02,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 07:51:02,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02" (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 07:51:02,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 07:51:02,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 07:51:02,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 07:51:02,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 07:51:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-09-10 07:51:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-10 07:51:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-09-10 07:51:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-09-10 07:51:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 07:51:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-09-10 07:51:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-09-10 07:51:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-09-10 07:51:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-09-10 07:51:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-09-10 07:51:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2019-09-10 07:51:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-09-10 07:51:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-09-10 07:51:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 07:51:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 07:51:02,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 07:51:03,583 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 07:51:03,584 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 07:51:03,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 07:51:03 BoogieIcfgContainer [2019-09-10 07:51:03,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 07:51:03,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 07:51:03,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 07:51:03,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 07:51:03,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 07:51:02" (1/3) ... [2019-09-10 07:51:03,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422b6eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 07:51:03, skipping insertion in model container [2019-09-10 07:51:03,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 07:51:02" (2/3) ... [2019-09-10 07:51:03,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422b6eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 07:51:03, skipping insertion in model container [2019-09-10 07:51:03,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 07:51:03" (3/3) ... [2019-09-10 07:51:03,600 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-09-10 07:51:03,611 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 07:51:03,634 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 07:51:03,653 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 07:51:03,689 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 07:51:03,689 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 07:51:03,690 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 07:51:03,690 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 07:51:03,690 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 07:51:03,690 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 07:51:03,691 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 07:51:03,691 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 07:51:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-09-10 07:51:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-10 07:51:03,743 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:03,744 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] [2019-09-10 07:51:03,747 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1010910297, now seen corresponding path program 1 times [2019-09-10 07:51:03,757 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:03,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:03,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:03,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:03,824 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:04,169 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 07:51:04,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:04,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:51:04,172 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:04,178 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:51:04,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:51:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:51:04,196 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-09-10 07:51:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:04,264 INFO L93 Difference]: Finished difference Result 134 states and 210 transitions. [2019-09-10 07:51:04,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:51:04,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-09-10 07:51:04,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:04,294 INFO L225 Difference]: With dead ends: 134 [2019-09-10 07:51:04,295 INFO L226 Difference]: Without dead ends: 126 [2019-09-10 07:51:04,298 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 07:51:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-09-10 07:51:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2019-09-10 07:51:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-10 07:51:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 179 transitions. [2019-09-10 07:51:04,351 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 179 transitions. Word has length 52 [2019-09-10 07:51:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:04,352 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 179 transitions. [2019-09-10 07:51:04,352 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:51:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 179 transitions. [2019-09-10 07:51:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-10 07:51:04,354 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:04,355 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] [2019-09-10 07:51:04,355 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash 642580825, now seen corresponding path program 1 times [2019-09-10 07:51:04,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:04,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:04,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:04,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:04,359 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:04,501 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 07:51:04,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:04,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:51:04,502 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:04,505 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:51:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:51:04,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:51:04,507 INFO L87 Difference]: Start difference. First operand 124 states and 179 transitions. Second operand 3 states. [2019-09-10 07:51:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:04,550 INFO L93 Difference]: Finished difference Result 202 states and 300 transitions. [2019-09-10 07:51:04,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:51:04,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-09-10 07:51:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:04,568 INFO L225 Difference]: With dead ends: 202 [2019-09-10 07:51:04,569 INFO L226 Difference]: Without dead ends: 202 [2019-09-10 07:51:04,570 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 07:51:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-09-10 07:51:04,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-09-10 07:51:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-09-10 07:51:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 299 transitions. [2019-09-10 07:51:04,597 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 299 transitions. Word has length 53 [2019-09-10 07:51:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:04,598 INFO L475 AbstractCegarLoop]: Abstraction has 200 states and 299 transitions. [2019-09-10 07:51:04,598 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:51:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 299 transitions. [2019-09-10 07:51:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-10 07:51:04,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:04,601 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] [2019-09-10 07:51:04,601 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 228050420, now seen corresponding path program 1 times [2019-09-10 07:51:04,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:04,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:04,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:04,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:04,611 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:04,744 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 07:51:04,744 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:04,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:51:04,744 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:04,745 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:51:04,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:51:04,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:51:04,746 INFO L87 Difference]: Start difference. First operand 200 states and 299 transitions. Second operand 3 states. [2019-09-10 07:51:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:04,777 INFO L93 Difference]: Finished difference Result 338 states and 512 transitions. [2019-09-10 07:51:04,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:51:04,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2019-09-10 07:51:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:04,782 INFO L225 Difference]: With dead ends: 338 [2019-09-10 07:51:04,782 INFO L226 Difference]: Without dead ends: 338 [2019-09-10 07:51:04,783 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 07:51:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-09-10 07:51:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2019-09-10 07:51:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2019-09-10 07:51:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 511 transitions. [2019-09-10 07:51:04,819 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 511 transitions. Word has length 54 [2019-09-10 07:51:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:04,820 INFO L475 AbstractCegarLoop]: Abstraction has 336 states and 511 transitions. [2019-09-10 07:51:04,820 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:51:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 511 transitions. [2019-09-10 07:51:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-10 07:51:04,823 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:04,824 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] [2019-09-10 07:51:04,824 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:04,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash -742349385, now seen corresponding path program 1 times [2019-09-10 07:51:04,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:04,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:04,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:04,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:04,829 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:04,979 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 07:51:04,979 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:04,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 07:51:04,980 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:04,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 07:51:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 07:51:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 07:51:04,981 INFO L87 Difference]: Start difference. First operand 336 states and 511 transitions. Second operand 5 states. [2019-09-10 07:51:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:05,119 INFO L93 Difference]: Finished difference Result 336 states and 507 transitions. [2019-09-10 07:51:05,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 07:51:05,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2019-09-10 07:51:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:05,123 INFO L225 Difference]: With dead ends: 336 [2019-09-10 07:51:05,123 INFO L226 Difference]: Without dead ends: 336 [2019-09-10 07:51:05,123 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-10 07:51:05,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-09-10 07:51:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2019-09-10 07:51:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2019-09-10 07:51:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 507 transitions. [2019-09-10 07:51:05,142 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 507 transitions. Word has length 55 [2019-09-10 07:51:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:05,143 INFO L475 AbstractCegarLoop]: Abstraction has 336 states and 507 transitions. [2019-09-10 07:51:05,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 07:51:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 507 transitions. [2019-09-10 07:51:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-10 07:51:05,146 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:05,146 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] [2019-09-10 07:51:05,146 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:05,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1710587378, now seen corresponding path program 1 times [2019-09-10 07:51:05,147 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:05,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:05,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:05,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:05,149 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:05,301 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 07:51:05,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:05,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 07:51:05,302 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:05,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 07:51:05,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 07:51:05,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 07:51:05,303 INFO L87 Difference]: Start difference. First operand 336 states and 507 transitions. Second operand 5 states. [2019-09-10 07:51:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:05,441 INFO L93 Difference]: Finished difference Result 336 states and 503 transitions. [2019-09-10 07:51:05,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 07:51:05,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2019-09-10 07:51:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:05,448 INFO L225 Difference]: With dead ends: 336 [2019-09-10 07:51:05,449 INFO L226 Difference]: Without dead ends: 336 [2019-09-10 07:51:05,449 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-10 07:51:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-09-10 07:51:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2019-09-10 07:51:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2019-09-10 07:51:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 503 transitions. [2019-09-10 07:51:05,465 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 503 transitions. Word has length 55 [2019-09-10 07:51:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:05,466 INFO L475 AbstractCegarLoop]: Abstraction has 336 states and 503 transitions. [2019-09-10 07:51:05,466 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 07:51:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 503 transitions. [2019-09-10 07:51:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-10 07:51:05,474 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:05,475 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] [2019-09-10 07:51:05,475 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash 263557783, now seen corresponding path program 1 times [2019-09-10 07:51:05,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:05,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:05,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:05,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:05,479 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:05,668 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 07:51:05,668 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:05,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 07:51:05,668 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:05,670 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 07:51:05,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 07:51:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-10 07:51:05,671 INFO L87 Difference]: Start difference. First operand 336 states and 503 transitions. Second operand 6 states. [2019-09-10 07:51:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:05,920 INFO L93 Difference]: Finished difference Result 2172 states and 3325 transitions. [2019-09-10 07:51:05,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-10 07:51:05,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2019-09-10 07:51:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:05,932 INFO L225 Difference]: With dead ends: 2172 [2019-09-10 07:51:05,933 INFO L226 Difference]: Without dead ends: 2172 [2019-09-10 07:51:05,933 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-09-10 07:51:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2019-09-10 07:51:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 640. [2019-09-10 07:51:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2019-09-10 07:51:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 959 transitions. [2019-09-10 07:51:05,966 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 959 transitions. Word has length 55 [2019-09-10 07:51:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:05,966 INFO L475 AbstractCegarLoop]: Abstraction has 640 states and 959 transitions. [2019-09-10 07:51:05,966 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 07:51:05,967 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 959 transitions. [2019-09-10 07:51:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-10 07:51:05,968 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:05,968 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] [2019-09-10 07:51:05,968 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1017233934, now seen corresponding path program 1 times [2019-09-10 07:51:05,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:05,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:05,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:05,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:05,970 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:06,034 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 07:51:06,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:06,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:51:06,035 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:06,035 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:51:06,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:51:06,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:51:06,036 INFO L87 Difference]: Start difference. First operand 640 states and 959 transitions. Second operand 3 states. [2019-09-10 07:51:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:06,079 INFO L93 Difference]: Finished difference Result 1170 states and 1704 transitions. [2019-09-10 07:51:06,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:51:06,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-09-10 07:51:06,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:06,087 INFO L225 Difference]: With dead ends: 1170 [2019-09-10 07:51:06,087 INFO L226 Difference]: Without dead ends: 1170 [2019-09-10 07:51:06,088 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 07:51:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2019-09-10 07:51:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1152. [2019-09-10 07:51:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-09-10 07:51:06,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1687 transitions. [2019-09-10 07:51:06,125 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1687 transitions. Word has length 57 [2019-09-10 07:51:06,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:06,126 INFO L475 AbstractCegarLoop]: Abstraction has 1152 states and 1687 transitions. [2019-09-10 07:51:06,127 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:51:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1687 transitions. [2019-09-10 07:51:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-10 07:51:06,128 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:06,129 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] [2019-09-10 07:51:06,129 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash -997184591, now seen corresponding path program 1 times [2019-09-10 07:51:06,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:06,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:06,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:06,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:06,132 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:06,403 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 07:51:06,404 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:06,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 07:51:06,404 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:06,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 07:51:06,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 07:51:06,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-10 07:51:06,406 INFO L87 Difference]: Start difference. First operand 1152 states and 1687 transitions. Second operand 6 states. [2019-09-10 07:51:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:06,546 INFO L93 Difference]: Finished difference Result 2270 states and 3346 transitions. [2019-09-10 07:51:06,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 07:51:06,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-09-10 07:51:06,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:06,560 INFO L225 Difference]: With dead ends: 2270 [2019-09-10 07:51:06,560 INFO L226 Difference]: Without dead ends: 2270 [2019-09-10 07:51:06,561 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-10 07:51:06,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2019-09-10 07:51:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1152. [2019-09-10 07:51:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-09-10 07:51:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1671 transitions. [2019-09-10 07:51:06,615 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1671 transitions. Word has length 57 [2019-09-10 07:51:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:06,616 INFO L475 AbstractCegarLoop]: Abstraction has 1152 states and 1671 transitions. [2019-09-10 07:51:06,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 07:51:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1671 transitions. [2019-09-10 07:51:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-10 07:51:06,617 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:06,617 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] [2019-09-10 07:51:06,618 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:06,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash 620001396, now seen corresponding path program 1 times [2019-09-10 07:51:06,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:06,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:06,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:06,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:06,621 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:06,693 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 07:51:06,693 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:06,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:51:06,693 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:06,694 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:51:06,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:51:06,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:51:06,694 INFO L87 Difference]: Start difference. First operand 1152 states and 1671 transitions. Second operand 3 states. [2019-09-10 07:51:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:06,720 INFO L93 Difference]: Finished difference Result 1604 states and 2322 transitions. [2019-09-10 07:51:06,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:51:06,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2019-09-10 07:51:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:06,728 INFO L225 Difference]: With dead ends: 1604 [2019-09-10 07:51:06,729 INFO L226 Difference]: Without dead ends: 1604 [2019-09-10 07:51:06,730 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 07:51:06,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2019-09-10 07:51:06,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1602. [2019-09-10 07:51:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1602 states. [2019-09-10 07:51:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2321 transitions. [2019-09-10 07:51:06,771 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2321 transitions. Word has length 58 [2019-09-10 07:51:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:06,771 INFO L475 AbstractCegarLoop]: Abstraction has 1602 states and 2321 transitions. [2019-09-10 07:51:06,771 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:51:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2321 transitions. [2019-09-10 07:51:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-10 07:51:06,772 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:06,772 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] [2019-09-10 07:51:06,772 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash -849860640, now seen corresponding path program 1 times [2019-09-10 07:51:06,773 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:06,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:06,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:06,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:06,776 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:06,873 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 07:51:06,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:06,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 07:51:06,873 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:06,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 07:51:06,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 07:51:06,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 07:51:06,875 INFO L87 Difference]: Start difference. First operand 1602 states and 2321 transitions. Second operand 5 states. [2019-09-10 07:51:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:06,947 INFO L93 Difference]: Finished difference Result 3022 states and 4323 transitions. [2019-09-10 07:51:06,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 07:51:06,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-09-10 07:51:06,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:06,966 INFO L225 Difference]: With dead ends: 3022 [2019-09-10 07:51:06,966 INFO L226 Difference]: Without dead ends: 3022 [2019-09-10 07:51:06,966 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-10 07:51:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2019-09-10 07:51:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 1682. [2019-09-10 07:51:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1682 states. [2019-09-10 07:51:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2393 transitions. [2019-09-10 07:51:07,022 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2393 transitions. Word has length 58 [2019-09-10 07:51:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:07,022 INFO L475 AbstractCegarLoop]: Abstraction has 1682 states and 2393 transitions. [2019-09-10 07:51:07,023 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 07:51:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2393 transitions. [2019-09-10 07:51:07,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-10 07:51:07,030 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:07,030 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:51:07,030 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash -911018282, now seen corresponding path program 1 times [2019-09-10 07:51:07,031 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:07,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:07,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:07,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:07,033 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-10 07:51:07,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:07,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 07:51:07,159 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:07,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 07:51:07,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 07:51:07,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-10 07:51:07,161 INFO L87 Difference]: Start difference. First operand 1682 states and 2393 transitions. Second operand 6 states. [2019-09-10 07:51:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:07,296 INFO L93 Difference]: Finished difference Result 3914 states and 5661 transitions. [2019-09-10 07:51:07,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 07:51:07,296 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2019-09-10 07:51:07,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:07,313 INFO L225 Difference]: With dead ends: 3914 [2019-09-10 07:51:07,314 INFO L226 Difference]: Without dead ends: 3914 [2019-09-10 07:51:07,315 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-09-10 07:51:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2019-09-10 07:51:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 2514. [2019-09-10 07:51:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2514 states. [2019-09-10 07:51:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2514 states to 2514 states and 3593 transitions. [2019-09-10 07:51:07,399 INFO L78 Accepts]: Start accepts. Automaton has 2514 states and 3593 transitions. Word has length 81 [2019-09-10 07:51:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:07,399 INFO L475 AbstractCegarLoop]: Abstraction has 2514 states and 3593 transitions. [2019-09-10 07:51:07,400 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 07:51:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2514 states and 3593 transitions. [2019-09-10 07:51:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-10 07:51:07,402 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:07,402 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:51:07,402 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:07,403 INFO L82 PathProgramCache]: Analyzing trace with hash -934763504, now seen corresponding path program 1 times [2019-09-10 07:51:07,403 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:07,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:07,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:07,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:07,406 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:07,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:07,504 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:51:07,505 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 82 with the following transitions: [2019-09-10 07:51:07,508 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [92], [95], [103], [105], [108], [111], [116], [118], [121], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [174], [176], [179], [182], [184], [192], [195], [201], [204], [207], [209], [224], [226], [229], [232], [234], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:51:07,561 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:51:07,561 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:51:07,723 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:51:08,153 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:51:08,156 INFO L272 AbstractInterpreter]: Visited 71 different actions 452 times. Merged at 41 different actions 336 times. Widened at 13 different actions 37 times. Performed 1597 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1597 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 36 fixpoints after 13 different actions. Largest state had 109 variables. [2019-09-10 07:51:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:08,163 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:51:08,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:08,164 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 07:51:08,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:08,193 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 07:51:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:08,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 07:51:08,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:51:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-10 07:51:08,432 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:51:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-10 07:51:08,503 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-09-10 07:51:08,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2019-09-10 07:51:08,503 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:08,504 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 07:51:08,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 07:51:08,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-10 07:51:08,505 INFO L87 Difference]: Start difference. First operand 2514 states and 3593 transitions. Second operand 6 states. [2019-09-10 07:51:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:08,698 INFO L93 Difference]: Finished difference Result 4746 states and 6861 transitions. [2019-09-10 07:51:08,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 07:51:08,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2019-09-10 07:51:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:08,719 INFO L225 Difference]: With dead ends: 4746 [2019-09-10 07:51:08,719 INFO L226 Difference]: Without dead ends: 4746 [2019-09-10 07:51:08,720 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-10 07:51:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2019-09-10 07:51:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3346. [2019-09-10 07:51:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3346 states. [2019-09-10 07:51:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 4793 transitions. [2019-09-10 07:51:08,812 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 4793 transitions. Word has length 81 [2019-09-10 07:51:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:08,812 INFO L475 AbstractCegarLoop]: Abstraction has 3346 states and 4793 transitions. [2019-09-10 07:51:08,812 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 07:51:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 4793 transitions. [2019-09-10 07:51:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-10 07:51:08,814 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:08,815 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:51:08,815 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1307289398, now seen corresponding path program 1 times [2019-09-10 07:51:08,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:08,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:08,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:08,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:08,819 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:08,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:08,920 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:51:08,921 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 82 with the following transitions: [2019-09-10 07:51:08,921 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [92], [95], [98], [103], [105], [108], [116], [118], [121], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [174], [176], [179], [182], [184], [199], [201], [204], [207], [209], [217], [220], [226], [229], [232], [234], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:51:08,935 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:51:08,935 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:51:08,962 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:51:09,222 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:51:09,223 INFO L272 AbstractInterpreter]: Visited 71 different actions 414 times. Merged at 41 different actions 303 times. Widened at 15 different actions 37 times. Performed 1483 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1483 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 34 fixpoints after 11 different actions. Largest state had 109 variables. [2019-09-10 07:51:09,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:09,223 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:51:09,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:09,224 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 07:51:09,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:09,254 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:51:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:09,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 07:51:09,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:51:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-10 07:51:09,428 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:51:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-10 07:51:09,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-09-10 07:51:09,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2019-09-10 07:51:09,535 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:09,536 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 07:51:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 07:51:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-09-10 07:51:09,537 INFO L87 Difference]: Start difference. First operand 3346 states and 4793 transitions. Second operand 6 states. [2019-09-10 07:51:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:09,652 INFO L93 Difference]: Finished difference Result 5578 states and 8061 transitions. [2019-09-10 07:51:09,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 07:51:09,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2019-09-10 07:51:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:09,696 INFO L225 Difference]: With dead ends: 5578 [2019-09-10 07:51:09,696 INFO L226 Difference]: Without dead ends: 5578 [2019-09-10 07:51:09,696 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-09-10 07:51:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5578 states. [2019-09-10 07:51:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5578 to 4178. [2019-09-10 07:51:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4178 states. [2019-09-10 07:51:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 5993 transitions. [2019-09-10 07:51:09,789 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 5993 transitions. Word has length 81 [2019-09-10 07:51:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:09,790 INFO L475 AbstractCegarLoop]: Abstraction has 4178 states and 5993 transitions. [2019-09-10 07:51:09,790 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 07:51:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 5993 transitions. [2019-09-10 07:51:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-10 07:51:09,792 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:09,793 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:51:09,793 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:09,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1399365996, now seen corresponding path program 1 times [2019-09-10 07:51:09,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:09,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:09,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:09,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:09,796 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:09,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:09,888 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:51:09,888 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 83 with the following transitions: [2019-09-10 07:51:09,889 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [90], [92], [95], [103], [105], [108], [116], [118], [121], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [174], [176], [179], [182], [184], [199], [201], [204], [207], [209], [224], [226], [229], [232], [234], [242], [245], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:51:09,894 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:51:09,894 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:51:09,913 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:51:10,231 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:51:10,232 INFO L272 AbstractInterpreter]: Visited 76 different actions 473 times. Merged at 44 different actions 343 times. Widened at 18 different actions 49 times. Performed 1624 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1624 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 41 fixpoints after 12 different actions. Largest state had 109 variables. [2019-09-10 07:51:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:10,232 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:51:10,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:10,233 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) [2019-09-10 07:51:10,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:10,259 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:51:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:10,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 07:51:10,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:51:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 07:51:10,532 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:51:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 07:51:10,619 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-09-10 07:51:10,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2019-09-10 07:51:10,620 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:10,620 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 07:51:10,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 07:51:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-10 07:51:10,622 INFO L87 Difference]: Start difference. First operand 4178 states and 5993 transitions. Second operand 6 states. [2019-09-10 07:51:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:10,778 INFO L93 Difference]: Finished difference Result 6138 states and 8885 transitions. [2019-09-10 07:51:10,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 07:51:10,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2019-09-10 07:51:10,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:10,794 INFO L225 Difference]: With dead ends: 6138 [2019-09-10 07:51:10,794 INFO L226 Difference]: Without dead ends: 6138 [2019-09-10 07:51:10,795 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-10 07:51:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6138 states. [2019-09-10 07:51:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6138 to 4738. [2019-09-10 07:51:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4738 states. [2019-09-10 07:51:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 6817 transitions. [2019-09-10 07:51:10,903 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 6817 transitions. Word has length 82 [2019-09-10 07:51:10,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:10,903 INFO L475 AbstractCegarLoop]: Abstraction has 4738 states and 6817 transitions. [2019-09-10 07:51:10,903 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 07:51:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 6817 transitions. [2019-09-10 07:51:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-10 07:51:10,906 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:10,907 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:51:10,907 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:10,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:10,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1236566682, now seen corresponding path program 1 times [2019-09-10 07:51:10,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:10,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:10,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:10,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:10,909 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:11,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:11,163 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:51:11,163 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 84 with the following transitions: [2019-09-10 07:51:11,164 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [90], [92], [95], [103], [105], [108], [116], [118], [121], [129], [131], [134], [137], [141], [143], [146], [147], [149], [151], [156], [158], [161], [174], [176], [179], [182], [184], [199], [201], [204], [207], [209], [224], [226], [229], [232], [234], [249], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:51:11,169 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:51:11,169 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:51:11,195 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:51:11,444 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:51:11,445 INFO L272 AbstractInterpreter]: Visited 76 different actions 520 times. Merged at 45 different actions 378 times. Widened at 17 different actions 50 times. Performed 1840 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1840 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 68 fixpoints after 16 different actions. Largest state had 109 variables. [2019-09-10 07:51:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:11,445 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:51:11,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:11,446 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:51:11,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:11,465 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:51:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:11,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-10 07:51:11,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:51:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 07:51:11,696 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:51:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 07:51:11,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:51:11,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 14 [2019-09-10 07:51:11,814 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:51:11,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-10 07:51:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-10 07:51:11,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-10 07:51:11,816 INFO L87 Difference]: Start difference. First operand 4738 states and 6817 transitions. Second operand 12 states. [2019-09-10 07:51:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:16,509 INFO L93 Difference]: Finished difference Result 43924 states and 60722 transitions. [2019-09-10 07:51:16,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-10 07:51:16,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2019-09-10 07:51:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:16,596 INFO L225 Difference]: With dead ends: 43924 [2019-09-10 07:51:16,597 INFO L226 Difference]: Without dead ends: 43924 [2019-09-10 07:51:16,601 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2835 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1461, Invalid=6195, Unknown=0, NotChecked=0, Total=7656 [2019-09-10 07:51:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43924 states. [2019-09-10 07:51:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43924 to 17370. [2019-09-10 07:51:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17370 states. [2019-09-10 07:51:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17370 states to 17370 states and 24219 transitions. [2019-09-10 07:51:17,206 INFO L78 Accepts]: Start accepts. Automaton has 17370 states and 24219 transitions. Word has length 83 [2019-09-10 07:51:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:17,206 INFO L475 AbstractCegarLoop]: Abstraction has 17370 states and 24219 transitions. [2019-09-10 07:51:17,206 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-10 07:51:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 17370 states and 24219 transitions. [2019-09-10 07:51:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-10 07:51:17,210 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:17,210 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:51:17,211 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash -982227461, now seen corresponding path program 1 times [2019-09-10 07:51:17,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:17,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:17,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:17,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:17,214 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:17,273 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:51:17,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:51:17,273 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:51:17,274 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:51:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:51:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:51:17,274 INFO L87 Difference]: Start difference. First operand 17370 states and 24219 transitions. Second operand 3 states. [2019-09-10 07:51:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:17,313 INFO L93 Difference]: Finished difference Result 12229 states and 16934 transitions. [2019-09-10 07:51:17,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:51:17,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2019-09-10 07:51:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:17,337 INFO L225 Difference]: With dead ends: 12229 [2019-09-10 07:51:17,337 INFO L226 Difference]: Without dead ends: 12229 [2019-09-10 07:51:17,338 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 07:51:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12229 states. [2019-09-10 07:51:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12229 to 12227. [2019-09-10 07:51:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12227 states. [2019-09-10 07:51:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12227 states to 12227 states and 16933 transitions. [2019-09-10 07:51:17,495 INFO L78 Accepts]: Start accepts. Automaton has 12227 states and 16933 transitions. Word has length 83 [2019-09-10 07:51:17,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:17,495 INFO L475 AbstractCegarLoop]: Abstraction has 12227 states and 16933 transitions. [2019-09-10 07:51:17,495 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:51:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 12227 states and 16933 transitions. [2019-09-10 07:51:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-10 07:51:17,497 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:17,498 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:51:17,498 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:17,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1262120977, now seen corresponding path program 1 times [2019-09-10 07:51:17,498 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:17,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:17,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:17,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:17,500 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:17,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:17,695 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:51:17,695 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 85 with the following transitions: [2019-09-10 07:51:17,695 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [90], [92], [95], [98], [103], [105], [108], [116], [118], [121], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [174], [176], [179], [182], [184], [199], [201], [204], [207], [209], [217], [220], [226], [229], [232], [234], [242], [245], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:51:17,697 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:51:17,698 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:51:17,711 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:51:17,985 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:51:17,985 INFO L272 AbstractInterpreter]: Visited 78 different actions 587 times. Merged at 48 different actions 448 times. Widened at 15 different actions 64 times. Performed 1932 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1932 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 53 fixpoints after 13 different actions. Largest state had 109 variables. [2019-09-10 07:51:17,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:17,985 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:51:17,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:17,986 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:51:18,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:18,011 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:51:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:18,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-10 07:51:18,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:51:18,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:51:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:18,939 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:51:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:20,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:51:20,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 18] total 40 [2019-09-10 07:51:20,142 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:51:20,142 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-10 07:51:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-10 07:51:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2019-09-10 07:51:20,143 INFO L87 Difference]: Start difference. First operand 12227 states and 16933 transitions. Second operand 24 states. [2019-09-10 07:51:21,217 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2019-09-10 07:51:21,631 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2019-09-10 07:51:22,172 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2019-09-10 07:51:22,358 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2019-09-10 07:51:22,642 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2019-09-10 07:51:22,784 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2019-09-10 07:51:23,351 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2019-09-10 07:51:23,642 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-09-10 07:51:24,450 WARN L188 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-09-10 07:51:27,498 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-09-10 07:51:28,137 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-09-10 07:51:28,501 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2019-09-10 07:51:29,618 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-09-10 07:51:30,407 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-09-10 07:51:36,043 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2019-09-10 07:51:41,996 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-09-10 07:51:43,764 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2019-09-10 07:51:43,968 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2019-09-10 07:51:44,313 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2019-09-10 07:51:44,563 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2019-09-10 07:51:44,751 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2019-09-10 07:51:45,121 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2019-09-10 07:51:45,268 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2019-09-10 07:51:45,414 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-09-10 07:51:45,570 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-09-10 07:51:45,907 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-09-10 07:51:46,173 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-09-10 07:51:46,444 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2019-09-10 07:51:46,609 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-09-10 07:51:46,806 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2019-09-10 07:51:46,955 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-09-10 07:51:47,122 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-09-10 07:51:47,370 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2019-09-10 07:51:47,577 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-09-10 07:51:47,777 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-09-10 07:51:48,056 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-09-10 07:51:49,117 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-09-10 07:51:49,369 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-09-10 07:51:49,918 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-09-10 07:51:50,408 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2019-09-10 07:51:50,802 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-09-10 07:51:50,961 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2019-09-10 07:51:54,137 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-09-10 07:51:54,304 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2019-09-10 07:51:54,779 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2019-09-10 07:51:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:51:55,674 INFO L93 Difference]: Finished difference Result 114832 states and 155334 transitions. [2019-09-10 07:51:55,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2019-09-10 07:51:55,675 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 84 [2019-09-10 07:51:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:51:55,950 INFO L225 Difference]: With dead ends: 114832 [2019-09-10 07:51:55,951 INFO L226 Difference]: Without dead ends: 114832 [2019-09-10 07:51:55,968 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32947 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=11884, Invalid=74258, Unknown=0, NotChecked=0, Total=86142 [2019-09-10 07:51:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114832 states. [2019-09-10 07:51:56,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114832 to 47814. [2019-09-10 07:51:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47814 states. [2019-09-10 07:51:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47814 states to 47814 states and 65489 transitions. [2019-09-10 07:51:56,962 INFO L78 Accepts]: Start accepts. Automaton has 47814 states and 65489 transitions. Word has length 84 [2019-09-10 07:51:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:51:56,963 INFO L475 AbstractCegarLoop]: Abstraction has 47814 states and 65489 transitions. [2019-09-10 07:51:56,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-10 07:51:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand 47814 states and 65489 transitions. [2019-09-10 07:51:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-10 07:51:56,970 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:51:56,970 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:51:56,971 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:51:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:56,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2085307495, now seen corresponding path program 1 times [2019-09-10 07:51:56,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:51:56,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:56,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:56,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:51:56,973 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:51:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:57,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:57,195 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:51:57,195 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 86 with the following transitions: [2019-09-10 07:51:57,195 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [103], [105], [108], [111], [116], [118], [121], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [174], [176], [179], [182], [184], [192], [195], [201], [204], [207], [209], [217], [220], [226], [229], [232], [234], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:51:57,203 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:51:57,204 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:51:57,220 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:51:57,478 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:51:57,479 INFO L272 AbstractInterpreter]: Visited 79 different actions 527 times. Merged at 49 different actions 396 times. Widened at 15 different actions 48 times. Performed 1778 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1778 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 46 fixpoints after 11 different actions. Largest state had 109 variables. [2019-09-10 07:51:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:51:57,480 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:51:57,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:51:57,480 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:51:58,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:51:58,293 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:51:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:51:58,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-10 07:51:58,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:51:58,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:51:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:58,748 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:51:58,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:51:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:51:59,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:51:59,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2019-09-10 07:51:59,003 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:51:59,003 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-10 07:51:59,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-10 07:51:59,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2019-09-10 07:51:59,004 INFO L87 Difference]: Start difference. First operand 47814 states and 65489 transitions. Second operand 17 states. [2019-09-10 07:52:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:52:01,388 INFO L93 Difference]: Finished difference Result 243381 states and 329136 transitions. [2019-09-10 07:52:01,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-10 07:52:01,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2019-09-10 07:52:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:52:01,801 INFO L225 Difference]: With dead ends: 243381 [2019-09-10 07:52:01,801 INFO L226 Difference]: Without dead ends: 243381 [2019-09-10 07:52:01,802 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=808, Invalid=2272, Unknown=0, NotChecked=0, Total=3080 [2019-09-10 07:52:02,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243381 states. [2019-09-10 07:52:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243381 to 109618. [2019-09-10 07:52:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109618 states. [2019-09-10 07:52:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109618 states to 109618 states and 150001 transitions. [2019-09-10 07:52:04,359 INFO L78 Accepts]: Start accepts. Automaton has 109618 states and 150001 transitions. Word has length 85 [2019-09-10 07:52:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:52:04,359 INFO L475 AbstractCegarLoop]: Abstraction has 109618 states and 150001 transitions. [2019-09-10 07:52:04,359 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-10 07:52:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 109618 states and 150001 transitions. [2019-09-10 07:52:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-10 07:52:04,366 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:52:04,366 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:52:04,366 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:52:04,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:52:04,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1833088786, now seen corresponding path program 1 times [2019-09-10 07:52:04,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:52:04,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:52:04,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:52:04,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:52:04,368 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:52:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:52:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 07:52:04,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:52:04,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:52:04,402 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:52:04,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:52:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:52:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:52:04,403 INFO L87 Difference]: Start difference. First operand 109618 states and 150001 transitions. Second operand 3 states. [2019-09-10 07:52:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:52:04,667 INFO L93 Difference]: Finished difference Result 84169 states and 114560 transitions. [2019-09-10 07:52:04,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:52:04,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2019-09-10 07:52:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:52:04,777 INFO L225 Difference]: With dead ends: 84169 [2019-09-10 07:52:04,778 INFO L226 Difference]: Without dead ends: 84169 [2019-09-10 07:52:04,778 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 07:52:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84169 states. [2019-09-10 07:52:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84169 to 84169. [2019-09-10 07:52:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84169 states. [2019-09-10 07:52:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84169 states to 84169 states and 114560 transitions. [2019-09-10 07:52:07,380 INFO L78 Accepts]: Start accepts. Automaton has 84169 states and 114560 transitions. Word has length 85 [2019-09-10 07:52:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:52:07,380 INFO L475 AbstractCegarLoop]: Abstraction has 84169 states and 114560 transitions. [2019-09-10 07:52:07,380 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:52:07,380 INFO L276 IsEmpty]: Start isEmpty. Operand 84169 states and 114560 transitions. [2019-09-10 07:52:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-10 07:52:07,387 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:52:07,387 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:52:07,387 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:52:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:52:07,388 INFO L82 PathProgramCache]: Analyzing trace with hash 131295856, now seen corresponding path program 1 times [2019-09-10 07:52:07,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:52:07,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:52:07,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:52:07,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:52:07,389 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:52:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:52:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 07:52:07,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:52:07,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:52:07,426 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:52:07,427 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:52:07,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:52:07,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:52:07,427 INFO L87 Difference]: Start difference. First operand 84169 states and 114560 transitions. Second operand 3 states. [2019-09-10 07:52:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:52:07,614 INFO L93 Difference]: Finished difference Result 69788 states and 94055 transitions. [2019-09-10 07:52:07,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:52:07,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-09-10 07:52:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:52:07,678 INFO L225 Difference]: With dead ends: 69788 [2019-09-10 07:52:07,679 INFO L226 Difference]: Without dead ends: 69788 [2019-09-10 07:52:07,679 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 07:52:07,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69788 states. [2019-09-10 07:52:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69788 to 69788. [2019-09-10 07:52:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69788 states. [2019-09-10 07:52:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69788 states to 69788 states and 94055 transitions. [2019-09-10 07:52:08,250 INFO L78 Accepts]: Start accepts. Automaton has 69788 states and 94055 transitions. Word has length 86 [2019-09-10 07:52:08,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:52:08,250 INFO L475 AbstractCegarLoop]: Abstraction has 69788 states and 94055 transitions. [2019-09-10 07:52:08,250 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:52:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 69788 states and 94055 transitions. [2019-09-10 07:52:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-10 07:52:08,255 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:52:08,256 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:52:08,256 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:52:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:52:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1788120362, now seen corresponding path program 1 times [2019-09-10 07:52:08,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:52:08,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:52:08,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:52:08,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:52:08,258 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:52:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:52:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:52:08,304 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:52:08,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:52:08,305 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:52:08,305 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:52:08,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:52:08,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:52:08,306 INFO L87 Difference]: Start difference. First operand 69788 states and 94055 transitions. Second operand 3 states. [2019-09-10 07:52:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:52:08,826 INFO L93 Difference]: Finished difference Result 35818 states and 47501 transitions. [2019-09-10 07:52:08,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:52:08,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-09-10 07:52:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:52:08,854 INFO L225 Difference]: With dead ends: 35818 [2019-09-10 07:52:08,855 INFO L226 Difference]: Without dead ends: 35818 [2019-09-10 07:52:08,855 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 07:52:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35818 states. [2019-09-10 07:52:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35818 to 35816. [2019-09-10 07:52:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35816 states. [2019-09-10 07:52:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35816 states to 35816 states and 47500 transitions. [2019-09-10 07:52:09,115 INFO L78 Accepts]: Start accepts. Automaton has 35816 states and 47500 transitions. Word has length 86 [2019-09-10 07:52:09,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:52:09,115 INFO L475 AbstractCegarLoop]: Abstraction has 35816 states and 47500 transitions. [2019-09-10 07:52:09,115 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:52:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 35816 states and 47500 transitions. [2019-09-10 07:52:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-10 07:52:09,118 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:52:09,118 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:52:09,119 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:52:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:52:09,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1683522070, now seen corresponding path program 1 times [2019-09-10 07:52:09,119 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:52:09,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:52:09,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:52:09,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:52:09,120 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:52:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:52:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:52:10,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:52:10,974 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:52:10,975 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 87 with the following transitions: [2019-09-10 07:52:10,975 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [116], [118], [121], [124], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [167], [170], [176], [179], [182], [184], [192], [195], [201], [204], [207], [209], [226], [229], [232], [234], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:52:10,980 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:52:10,980 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:52:10,996 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:52:11,238 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:52:11,238 INFO L272 AbstractInterpreter]: Visited 80 different actions 511 times. Merged at 50 different actions 383 times. Widened at 14 different actions 41 times. Performed 1681 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1681 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 44 fixpoints after 15 different actions. Largest state had 109 variables. [2019-09-10 07:52:11,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:52:11,239 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:52:11,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:52:11,239 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 07:52:11,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:52:11,261 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:52:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:52:11,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-10 07:52:11,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:52:11,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:52:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:52:13,246 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:52:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:52:13,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:52:13,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 45 [2019-09-10 07:52:13,924 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:52:13,925 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-10 07:52:13,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-10 07:52:13,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2019-09-10 07:52:13,926 INFO L87 Difference]: Start difference. First operand 35816 states and 47500 transitions. Second operand 35 states. [2019-09-10 07:52:14,116 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2019-09-10 07:52:14,785 WARN L188 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2019-09-10 07:52:15,552 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2019-09-10 07:52:15,752 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2019-09-10 07:52:16,056 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2019-09-10 07:52:16,278 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2019-09-10 07:52:16,577 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2019-09-10 07:52:16,885 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2019-09-10 07:52:17,254 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2019-09-10 07:52:17,681 WARN L188 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 93 [2019-09-10 07:52:18,263 WARN L188 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 109 [2019-09-10 07:52:19,047 WARN L188 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 127 [2019-09-10 07:52:19,435 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2019-09-10 07:52:19,917 WARN L188 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 107 [2019-09-10 07:52:20,950 WARN L188 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 142 [2019-09-10 07:52:22,043 WARN L188 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 147 [2019-09-10 07:52:22,812 WARN L188 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 122 [2019-09-10 07:52:23,254 WARN L188 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2019-09-10 07:52:24,475 WARN L188 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 169 DAG size of output: 127 [2019-09-10 07:52:24,807 WARN L188 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2019-09-10 07:52:25,099 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2019-09-10 07:52:25,522 WARN L188 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2019-09-10 07:52:25,831 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2019-09-10 07:52:26,161 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2019-09-10 07:52:26,438 WARN L188 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2019-09-10 07:52:26,632 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2019-09-10 07:52:26,823 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2019-09-10 07:52:27,141 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2019-09-10 07:52:27,397 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2019-09-10 07:52:27,713 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2019-09-10 07:52:28,100 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2019-09-10 07:52:28,423 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2019-09-10 07:52:28,743 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2019-09-10 07:52:28,943 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2019-09-10 07:52:29,155 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2019-09-10 07:52:29,343 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2019-09-10 07:52:29,806 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-09-10 07:52:30,188 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2019-09-10 07:52:30,583 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-09-10 07:52:30,879 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2019-09-10 07:52:31,153 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2019-09-10 07:52:31,580 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2019-09-10 07:52:31,936 WARN L188 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2019-09-10 07:52:32,175 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2019-09-10 07:52:32,510 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2019-09-10 07:52:32,907 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2019-09-10 07:52:33,109 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2019-09-10 07:52:33,561 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2019-09-10 07:52:33,756 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2019-09-10 07:52:34,059 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2019-09-10 07:52:34,247 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2019-09-10 07:52:35,203 WARN L188 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2019-09-10 07:52:35,755 WARN L188 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2019-09-10 07:52:35,963 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2019-09-10 07:52:36,329 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2019-09-10 07:52:37,098 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2019-09-10 07:52:37,291 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2019-09-10 07:52:37,940 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2019-09-10 07:52:38,276 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2019-09-10 07:52:38,496 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2019-09-10 07:52:38,810 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2019-09-10 07:52:39,115 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2019-09-10 07:52:39,422 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2019-09-10 07:52:40,006 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2019-09-10 07:52:40,411 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2019-09-10 07:52:41,122 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2019-09-10 07:52:41,584 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2019-09-10 07:52:41,914 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2019-09-10 07:52:42,273 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2019-09-10 07:52:42,621 WARN L188 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2019-09-10 07:52:42,918 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2019-09-10 07:52:43,252 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2019-09-10 07:52:43,710 WARN L188 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2019-09-10 07:52:44,058 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2019-09-10 07:52:44,436 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-09-10 07:52:44,604 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-09-10 07:52:44,808 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2019-09-10 07:52:45,071 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2019-09-10 07:52:45,275 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2019-09-10 07:52:45,495 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-09-10 07:52:45,981 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2019-09-10 07:52:46,318 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2019-09-10 07:52:46,731 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2019-09-10 07:52:47,200 WARN L188 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2019-09-10 07:52:47,633 WARN L188 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2019-09-10 07:52:48,003 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-09-10 07:52:48,261 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-09-10 07:52:48,530 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2019-09-10 07:52:48,713 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2019-09-10 07:52:48,972 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2019-09-10 07:52:49,202 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2019-09-10 07:52:49,666 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2019-09-10 07:52:49,985 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2019-09-10 07:52:50,488 WARN L188 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2019-09-10 07:52:50,746 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2019-09-10 07:52:51,013 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2019-09-10 07:52:51,198 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2019-09-10 07:52:51,559 WARN L188 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2019-09-10 07:52:51,913 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2019-09-10 07:52:52,343 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2019-09-10 07:52:52,663 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2019-09-10 07:52:52,924 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2019-09-10 07:52:53,996 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2019-09-10 07:52:54,238 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2019-09-10 07:52:54,457 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2019-09-10 07:52:54,868 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2019-09-10 07:52:55,048 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2019-09-10 07:52:55,683 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-09-10 07:52:56,283 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2019-09-10 07:52:56,694 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2019-09-10 07:52:57,464 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2019-09-10 07:52:57,785 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2019-09-10 07:52:58,448 WARN L188 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2019-09-10 07:52:58,720 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2019-09-10 07:52:59,286 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2019-09-10 07:52:59,659 WARN L188 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 85 [2019-09-10 07:53:00,028 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2019-09-10 07:53:00,208 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2019-09-10 07:53:00,531 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2019-09-10 07:53:00,811 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2019-09-10 07:53:01,288 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2019-09-10 07:53:01,754 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2019-09-10 07:53:01,917 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2019-09-10 07:53:02,452 WARN L188 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 106 [2019-09-10 07:53:02,923 WARN L188 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 102 [2019-09-10 07:53:03,307 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2019-09-10 07:53:03,760 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2019-09-10 07:53:04,328 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2019-09-10 07:53:04,925 WARN L188 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 97 [2019-09-10 07:53:05,119 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-09-10 07:53:05,297 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2019-09-10 07:53:06,479 WARN L188 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 106 [2019-09-10 07:53:07,024 WARN L188 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2019-09-10 07:53:07,333 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2019-09-10 07:53:07,643 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2019-09-10 07:53:07,995 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2019-09-10 07:53:08,303 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2019-09-10 07:53:08,756 WARN L188 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2019-09-10 07:53:09,714 WARN L188 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 112 [2019-09-10 07:53:09,915 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2019-09-10 07:53:10,147 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-09-10 07:53:10,510 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-09-10 07:53:10,689 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2019-09-10 07:53:10,960 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-09-10 07:53:11,473 WARN L188 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2019-09-10 07:53:11,735 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2019-09-10 07:53:12,064 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2019-09-10 07:53:12,750 WARN L188 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 99 [2019-09-10 07:53:13,080 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2019-09-10 07:53:13,616 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-09-10 07:53:14,070 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2019-09-10 07:53:14,311 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-09-10 07:53:14,489 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2019-09-10 07:53:14,741 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2019-09-10 07:53:15,493 WARN L188 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 118 [2019-09-10 07:53:15,716 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2019-09-10 07:53:16,164 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-09-10 07:53:16,576 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2019-09-10 07:53:19,172 WARN L188 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 83 [2019-09-10 07:53:19,585 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-09-10 07:53:20,120 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2019-09-10 07:53:20,665 WARN L188 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 101 [2019-09-10 07:53:21,330 WARN L188 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 115 [2019-09-10 07:53:21,817 WARN L188 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 89 [2019-09-10 07:53:22,075 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2019-09-10 07:53:22,892 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2019-09-10 07:53:23,204 WARN L188 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2019-09-10 07:53:24,015 WARN L188 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 133 [2019-09-10 07:53:24,514 WARN L188 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 95 [2019-09-10 07:53:25,054 WARN L188 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 107 [2019-09-10 07:53:25,418 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-09-10 07:53:26,056 WARN L188 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 113 [2019-09-10 07:53:26,295 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-09-10 07:53:26,584 WARN L188 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2019-09-10 07:53:27,010 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2019-09-10 07:53:27,870 WARN L188 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 116 [2019-09-10 07:53:28,561 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2019-09-10 07:53:28,860 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2019-09-10 07:53:29,610 WARN L188 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 121 [2019-09-10 07:53:29,933 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2019-09-10 07:53:30,265 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2019-09-10 07:53:30,560 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2019-09-10 07:53:30,849 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2019-09-10 07:53:31,091 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2019-09-10 07:53:31,561 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2019-09-10 07:53:31,856 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2019-09-10 07:53:32,156 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2019-09-10 07:53:32,461 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-09-10 07:53:33,036 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-09-10 07:53:33,421 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2019-09-10 07:53:33,611 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2019-09-10 07:53:34,337 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2019-09-10 07:53:34,802 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2019-09-10 07:53:35,129 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2019-09-10 07:53:35,624 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2019-09-10 07:53:35,942 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2019-09-10 07:53:36,414 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2019-09-10 07:53:36,756 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2019-09-10 07:53:37,090 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2019-09-10 07:53:37,405 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2019-09-10 07:53:38,083 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2019-09-10 07:53:38,483 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2019-09-10 07:53:38,865 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2019-09-10 07:53:39,163 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2019-09-10 07:53:39,603 WARN L188 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2019-09-10 07:53:40,008 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2019-09-10 07:53:40,292 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2019-09-10 07:53:40,566 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2019-09-10 07:53:40,860 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2019-09-10 07:53:41,336 WARN L188 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 90 [2019-09-10 07:53:41,866 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2019-09-10 07:53:42,195 WARN L188 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2019-09-10 07:53:42,427 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-09-10 07:53:42,724 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2019-09-10 07:53:43,093 WARN L188 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2019-09-10 07:53:43,373 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2019-09-10 07:53:44,108 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2019-09-10 07:53:44,420 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2019-09-10 07:53:44,900 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2019-09-10 07:53:45,104 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2019-09-10 07:53:45,394 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2019-09-10 07:53:45,571 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2019-09-10 07:53:45,856 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2019-09-10 07:53:46,459 WARN L188 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2019-09-10 07:53:46,845 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2019-09-10 07:53:47,144 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2019-09-10 07:53:47,756 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2019-09-10 07:53:48,268 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2019-09-10 07:53:48,550 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2019-09-10 07:53:48,835 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2019-09-10 07:53:49,240 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2019-09-10 07:53:49,484 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-09-10 07:53:49,759 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2019-09-10 07:53:50,053 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2019-09-10 07:53:50,267 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2019-09-10 07:53:50,727 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-09-10 07:53:51,614 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2019-09-10 07:53:51,897 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2019-09-10 07:53:52,208 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2019-09-10 07:53:52,516 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2019-09-10 07:53:52,806 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2019-09-10 07:53:53,322 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2019-09-10 07:53:53,508 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2019-09-10 07:53:53,795 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2019-09-10 07:53:54,059 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2019-09-10 07:53:54,423 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2019-09-10 07:53:54,723 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2019-09-10 07:53:54,926 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2019-09-10 07:53:55,208 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2019-09-10 07:53:55,616 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2019-09-10 07:53:56,321 WARN L188 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 95 [2019-09-10 07:53:56,532 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2019-09-10 07:53:56,955 WARN L188 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2019-09-10 07:53:57,380 WARN L188 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2019-09-10 07:53:57,618 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2019-09-10 07:53:58,035 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2019-09-10 07:53:58,469 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2019-09-10 07:53:58,895 WARN L188 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2019-09-10 07:53:59,159 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2019-09-10 07:53:59,509 WARN L188 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2019-09-10 07:53:59,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:53:59,929 INFO L93 Difference]: Finished difference Result 192088 states and 256560 transitions. [2019-09-10 07:53:59,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2019-09-10 07:53:59,931 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2019-09-10 07:53:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:54:00,118 INFO L225 Difference]: With dead ends: 192088 [2019-09-10 07:54:00,118 INFO L226 Difference]: Without dead ends: 192088 [2019-09-10 07:54:00,125 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 144 SyntacticMatches, 10 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60569 ImplicationChecksByTransitivity, 89.2s TimeCoverageRelationStatistics Valid=15360, Invalid=130182, Unknown=0, NotChecked=0, Total=145542 [2019-09-10 07:54:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192088 states. [2019-09-10 07:54:01,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192088 to 36670. [2019-09-10 07:54:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36670 states. [2019-09-10 07:54:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36670 states to 36670 states and 48719 transitions. [2019-09-10 07:54:01,097 INFO L78 Accepts]: Start accepts. Automaton has 36670 states and 48719 transitions. Word has length 86 [2019-09-10 07:54:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:54:01,098 INFO L475 AbstractCegarLoop]: Abstraction has 36670 states and 48719 transitions. [2019-09-10 07:54:01,098 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-10 07:54:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 36670 states and 48719 transitions. [2019-09-10 07:54:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-10 07:54:01,101 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:54:01,101 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:54:01,101 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:54:01,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash -229751769, now seen corresponding path program 1 times [2019-09-10 07:54:01,102 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:54:01,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:01,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:01,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:01,104 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:54:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 07:54:01,144 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:54:01,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:54:01,144 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:54:01,145 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:54:01,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:54:01,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:54:01,145 INFO L87 Difference]: Start difference. First operand 36670 states and 48719 transitions. Second operand 3 states. [2019-09-10 07:54:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:54:01,247 INFO L93 Difference]: Finished difference Result 32342 states and 42747 transitions. [2019-09-10 07:54:01,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:54:01,247 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-09-10 07:54:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:54:01,287 INFO L225 Difference]: With dead ends: 32342 [2019-09-10 07:54:01,287 INFO L226 Difference]: Without dead ends: 32342 [2019-09-10 07:54:01,287 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 07:54:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32342 states. [2019-09-10 07:54:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32342 to 32342. [2019-09-10 07:54:01,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32342 states. [2019-09-10 07:54:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32342 states to 32342 states and 42747 transitions. [2019-09-10 07:54:01,959 INFO L78 Accepts]: Start accepts. Automaton has 32342 states and 42747 transitions. Word has length 86 [2019-09-10 07:54:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:54:01,960 INFO L475 AbstractCegarLoop]: Abstraction has 32342 states and 42747 transitions. [2019-09-10 07:54:01,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:54:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 32342 states and 42747 transitions. [2019-09-10 07:54:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-10 07:54:01,962 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:54:01,962 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:54:01,962 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:54:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1149367248, now seen corresponding path program 1 times [2019-09-10 07:54:01,963 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:54:01,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:01,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:01,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:01,964 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:54:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:54:02,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:54:02,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:54:02,010 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:54:02,010 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:54:02,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:54:02,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:54:02,011 INFO L87 Difference]: Start difference. First operand 32342 states and 42747 transitions. Second operand 3 states. [2019-09-10 07:54:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:54:02,058 INFO L93 Difference]: Finished difference Result 18783 states and 24429 transitions. [2019-09-10 07:54:02,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:54:02,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2019-09-10 07:54:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:54:02,078 INFO L225 Difference]: With dead ends: 18783 [2019-09-10 07:54:02,078 INFO L226 Difference]: Without dead ends: 18783 [2019-09-10 07:54:02,078 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 07:54:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18783 states. [2019-09-10 07:54:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18783 to 18781. [2019-09-10 07:54:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18781 states. [2019-09-10 07:54:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18781 states to 18781 states and 24428 transitions. [2019-09-10 07:54:02,225 INFO L78 Accepts]: Start accepts. Automaton has 18781 states and 24428 transitions. Word has length 87 [2019-09-10 07:54:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:54:02,225 INFO L475 AbstractCegarLoop]: Abstraction has 18781 states and 24428 transitions. [2019-09-10 07:54:02,226 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:54:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 18781 states and 24428 transitions. [2019-09-10 07:54:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-10 07:54:02,227 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:54:02,227 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:54:02,227 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:54:02,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:02,228 INFO L82 PathProgramCache]: Analyzing trace with hash 555199248, now seen corresponding path program 1 times [2019-09-10 07:54:02,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:54:02,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:02,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:02,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:02,229 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:54:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:54:03,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:54:03,145 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:54:03,145 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 88 with the following transitions: [2019-09-10 07:54:03,145 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [90], [92], [95], [98], [103], [105], [108], [111], [114], [116], [118], [121], [124], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [167], [170], [176], [179], [182], [184], [201], [204], [207], [209], [217], [220], [226], [229], [232], [234], [242], [247], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:54:03,147 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:54:03,147 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:54:03,161 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:54:03,436 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:54:03,436 INFO L272 AbstractInterpreter]: Visited 81 different actions 591 times. Merged at 51 different actions 455 times. Widened at 14 different actions 64 times. Performed 1908 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1908 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 50 fixpoints after 13 different actions. Largest state had 109 variables. [2019-09-10 07:54:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:03,436 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:54:03,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:54:03,437 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 07:54:03,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:03,457 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:54:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:03,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-10 07:54:03,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:54:03,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:54:04,124 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:54:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:54:04,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:54:04,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 38 [2019-09-10 07:54:04,681 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:54:04,681 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-10 07:54:04,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-10 07:54:04,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2019-09-10 07:54:04,682 INFO L87 Difference]: Start difference. First operand 18781 states and 24428 transitions. Second operand 28 states. [2019-09-10 07:54:10,021 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2019-09-10 07:54:10,264 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2019-09-10 07:54:10,570 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2019-09-10 07:54:10,875 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2019-09-10 07:54:11,254 WARN L188 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2019-09-10 07:54:11,628 WARN L188 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2019-09-10 07:54:12,220 WARN L188 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2019-09-10 07:54:12,510 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2019-09-10 07:54:12,859 WARN L188 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2019-09-10 07:54:13,116 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2019-09-10 07:54:13,364 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2019-09-10 07:54:13,645 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2019-09-10 07:54:13,897 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2019-09-10 07:54:14,200 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2019-09-10 07:54:14,704 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2019-09-10 07:54:15,114 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-09-10 07:54:15,579 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2019-09-10 07:54:15,831 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2019-09-10 07:54:16,284 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2019-09-10 07:54:16,546 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2019-09-10 07:54:16,823 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-09-10 07:54:17,054 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2019-09-10 07:54:17,396 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2019-09-10 07:54:17,643 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2019-09-10 07:54:17,946 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2019-09-10 07:54:18,426 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2019-09-10 07:54:18,778 WARN L188 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2019-09-10 07:54:19,075 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2019-09-10 07:54:19,357 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2019-09-10 07:54:19,871 WARN L188 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2019-09-10 07:54:20,082 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2019-09-10 07:54:20,339 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-09-10 07:54:20,751 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2019-09-10 07:54:20,982 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-09-10 07:54:21,213 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-09-10 07:54:21,498 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2019-09-10 07:54:22,584 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2019-09-10 07:54:22,749 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2019-09-10 07:54:24,096 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2019-09-10 07:54:24,607 WARN L188 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-09-10 07:54:25,075 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-09-10 07:54:25,389 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2019-09-10 07:54:28,365 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-09-10 07:54:28,667 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-09-10 07:54:28,969 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2019-09-10 07:54:30,492 WARN L188 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2019-09-10 07:54:30,852 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2019-09-10 07:54:32,343 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2019-09-10 07:54:32,640 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2019-09-10 07:54:32,889 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-09-10 07:54:33,161 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2019-09-10 07:54:33,461 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2019-09-10 07:54:33,818 WARN L188 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2019-09-10 07:54:34,114 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2019-09-10 07:54:34,422 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2019-09-10 07:54:34,792 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2019-09-10 07:54:35,057 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-09-10 07:54:35,340 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2019-09-10 07:54:35,667 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2019-09-10 07:54:36,034 WARN L188 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2019-09-10 07:54:36,364 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2019-09-10 07:54:36,599 WARN L188 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-09-10 07:54:36,878 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2019-09-10 07:54:37,208 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-09-10 07:54:37,486 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2019-09-10 07:54:38,216 WARN L188 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2019-09-10 07:54:38,746 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2019-09-10 07:54:39,440 WARN L188 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2019-09-10 07:54:39,917 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2019-09-10 07:54:40,108 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-09-10 07:54:40,393 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2019-09-10 07:54:40,586 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-09-10 07:54:40,817 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-09-10 07:54:41,204 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-09-10 07:54:41,606 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2019-09-10 07:54:42,049 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-09-10 07:54:42,367 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-09-10 07:54:42,743 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2019-09-10 07:54:43,013 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-09-10 07:54:43,299 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2019-09-10 07:54:43,566 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-09-10 07:54:43,823 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2019-09-10 07:54:44,059 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2019-09-10 07:54:45,035 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2019-09-10 07:54:45,194 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2019-09-10 07:54:45,756 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-09-10 07:54:45,983 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2019-09-10 07:54:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:54:46,023 INFO L93 Difference]: Finished difference Result 40819 states and 53038 transitions. [2019-09-10 07:54:46,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2019-09-10 07:54:46,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2019-09-10 07:54:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:54:46,056 INFO L225 Difference]: With dead ends: 40819 [2019-09-10 07:54:46,057 INFO L226 Difference]: Without dead ends: 40819 [2019-09-10 07:54:46,058 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10423 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=4705, Invalid=25745, Unknown=0, NotChecked=0, Total=30450 [2019-09-10 07:54:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40819 states. [2019-09-10 07:54:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40819 to 22945. [2019-09-10 07:54:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22945 states. [2019-09-10 07:54:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22945 states to 22945 states and 30209 transitions. [2019-09-10 07:54:46,355 INFO L78 Accepts]: Start accepts. Automaton has 22945 states and 30209 transitions. Word has length 87 [2019-09-10 07:54:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:54:46,355 INFO L475 AbstractCegarLoop]: Abstraction has 22945 states and 30209 transitions. [2019-09-10 07:54:46,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-10 07:54:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 22945 states and 30209 transitions. [2019-09-10 07:54:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-10 07:54:46,356 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:54:46,357 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:54:46,357 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:54:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash 232374447, now seen corresponding path program 1 times [2019-09-10 07:54:46,357 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:54:46,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:46,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:46,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:46,358 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:54:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:54:46,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:54:46,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:54:46,402 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:54:46,402 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:54:46,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:54:46,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:54:46,403 INFO L87 Difference]: Start difference. First operand 22945 states and 30209 transitions. Second operand 3 states. [2019-09-10 07:54:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:54:46,430 INFO L93 Difference]: Finished difference Result 9203 states and 11812 transitions. [2019-09-10 07:54:46,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:54:46,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2019-09-10 07:54:46,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:54:46,439 INFO L225 Difference]: With dead ends: 9203 [2019-09-10 07:54:46,439 INFO L226 Difference]: Without dead ends: 9203 [2019-09-10 07:54:46,440 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 07:54:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9203 states. [2019-09-10 07:54:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9203 to 8817. [2019-09-10 07:54:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8817 states. [2019-09-10 07:54:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 11322 transitions. [2019-09-10 07:54:46,523 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 11322 transitions. Word has length 87 [2019-09-10 07:54:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:54:46,524 INFO L475 AbstractCegarLoop]: Abstraction has 8817 states and 11322 transitions. [2019-09-10 07:54:46,524 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:54:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 11322 transitions. [2019-09-10 07:54:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-10 07:54:46,525 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:54:46,526 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:54:46,526 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:54:46,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:46,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1759219311, now seen corresponding path program 1 times [2019-09-10 07:54:46,526 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:54:46,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:46,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:46,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:46,528 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:54:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:54:47,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:54:47,571 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:54:47,571 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 88 with the following transitions: [2019-09-10 07:54:47,571 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [103], [105], [108], [111], [114], [116], [118], [121], [124], [127], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [163], [176], [179], [182], [184], [201], [204], [207], [209], [217], [220], [226], [229], [232], [234], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:54:47,573 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:54:47,573 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:54:47,584 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:54:47,807 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:54:47,807 INFO L272 AbstractInterpreter]: Visited 79 different actions 464 times. Merged at 49 different actions 341 times. Widened at 14 different actions 33 times. Performed 1577 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1577 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 38 fixpoints after 12 different actions. Largest state had 109 variables. [2019-09-10 07:54:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:47,808 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:54:47,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:54:47,808 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:54:47,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:47,840 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:54:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:47,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-10 07:54:47,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:54:48,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:54:49,461 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:54:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-10 07:54:49,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:54:49,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 37 [2019-09-10 07:54:49,966 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:54:49,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-10 07:54:49,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-10 07:54:49,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2019-09-10 07:54:49,967 INFO L87 Difference]: Start difference. First operand 8817 states and 11322 transitions. Second operand 28 states. [2019-09-10 07:54:50,821 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2019-09-10 07:54:51,364 WARN L188 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2019-09-10 07:54:51,827 WARN L188 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2019-09-10 07:54:52,164 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2019-09-10 07:54:52,406 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2019-09-10 07:54:52,618 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2019-09-10 07:54:52,844 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2019-09-10 07:54:53,021 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2019-09-10 07:54:53,211 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2019-09-10 07:54:53,443 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2019-09-10 07:54:53,799 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2019-09-10 07:54:53,973 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2019-09-10 07:54:54,208 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2019-09-10 07:54:55,127 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2019-09-10 07:54:55,459 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-09-10 07:54:56,217 WARN L188 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 93 [2019-09-10 07:54:56,859 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2019-09-10 07:54:57,433 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-09-10 07:54:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:54:57,444 INFO L93 Difference]: Finished difference Result 9628 states and 12355 transitions. [2019-09-10 07:54:57,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-10 07:54:57,444 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 87 [2019-09-10 07:54:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:54:57,454 INFO L225 Difference]: With dead ends: 9628 [2019-09-10 07:54:57,454 INFO L226 Difference]: Without dead ends: 9628 [2019-09-10 07:54:57,455 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 143 SyntacticMatches, 15 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=889, Invalid=4223, Unknown=0, NotChecked=0, Total=5112 [2019-09-10 07:54:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9628 states. [2019-09-10 07:54:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9628 to 6237. [2019-09-10 07:54:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6237 states. [2019-09-10 07:54:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6237 states to 6237 states and 7881 transitions. [2019-09-10 07:54:57,505 INFO L78 Accepts]: Start accepts. Automaton has 6237 states and 7881 transitions. Word has length 87 [2019-09-10 07:54:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:54:57,505 INFO L475 AbstractCegarLoop]: Abstraction has 6237 states and 7881 transitions. [2019-09-10 07:54:57,505 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-10 07:54:57,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6237 states and 7881 transitions. [2019-09-10 07:54:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-10 07:54:57,506 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:54:57,507 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-10 07:54:57,507 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:54:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:57,507 INFO L82 PathProgramCache]: Analyzing trace with hash 569552534, now seen corresponding path program 1 times [2019-09-10 07:54:57,507 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:54:57,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:57,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:57,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:57,509 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:54:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 07:54:57,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 07:54:57,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 07:54:57,551 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 07:54:57,552 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 07:54:57,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 07:54:57,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 07:54:57,552 INFO L87 Difference]: Start difference. First operand 6237 states and 7881 transitions. Second operand 3 states. [2019-09-10 07:54:57,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:54:57,599 INFO L93 Difference]: Finished difference Result 3883 states and 4857 transitions. [2019-09-10 07:54:57,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 07:54:57,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-09-10 07:54:57,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:54:57,603 INFO L225 Difference]: With dead ends: 3883 [2019-09-10 07:54:57,603 INFO L226 Difference]: Without dead ends: 3883 [2019-09-10 07:54:57,604 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 07:54:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3883 states. [2019-09-10 07:54:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3883 to 3883. [2019-09-10 07:54:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3883 states. [2019-09-10 07:54:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 4857 transitions. [2019-09-10 07:54:57,639 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 4857 transitions. Word has length 88 [2019-09-10 07:54:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:54:57,639 INFO L475 AbstractCegarLoop]: Abstraction has 3883 states and 4857 transitions. [2019-09-10 07:54:57,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 07:54:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 4857 transitions. [2019-09-10 07:54:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-10 07:54:57,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:54:57,644 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:54:57,644 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:54:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:57,644 INFO L82 PathProgramCache]: Analyzing trace with hash -39973736, now seen corresponding path program 1 times [2019-09-10 07:54:57,644 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:54:57,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:57,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:57,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:54:57,645 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:54:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 35 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:54:57,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:54:57,945 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:54:57,945 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 140 with the following transitions: [2019-09-10 07:54:57,946 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [127], [129], [131], [134], [137], [141], [143], [146], [147], [149], [151], [156], [158], [161], [174], [176], [179], [182], [184], [199], [201], [204], [207], [209], [224], [226], [229], [232], [234], [249], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:54:57,947 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:54:57,947 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:54:57,959 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:54:58,411 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:54:58,412 INFO L272 AbstractInterpreter]: Visited 84 different actions 1098 times. Merged at 53 different actions 819 times. Widened at 23 different actions 172 times. Performed 3418 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3418 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 186 fixpoints after 24 different actions. Largest state had 109 variables. [2019-09-10 07:54:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:54:58,412 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:54:58,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:54:58,413 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 07:54:58,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:54:58,429 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:54:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:54:58,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-10 07:54:58,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:54:58,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:58,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 49 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:54:59,147 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:54:59,434 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:54:59,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:00,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 43 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:00,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:55:00,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2019-09-10 07:55:00,787 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:55:00,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-10 07:55:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-10 07:55:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2019-09-10 07:55:00,789 INFO L87 Difference]: Start difference. First operand 3883 states and 4857 transitions. Second operand 21 states. [2019-09-10 07:55:01,101 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2019-09-10 07:55:01,611 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2019-09-10 07:55:01,993 WARN L188 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2019-09-10 07:55:02,396 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2019-09-10 07:55:02,913 WARN L188 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2019-09-10 07:55:03,253 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2019-09-10 07:55:03,493 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2019-09-10 07:55:04,131 WARN L188 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2019-09-10 07:55:04,435 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2019-09-10 07:55:04,879 WARN L188 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2019-09-10 07:55:05,444 WARN L188 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2019-09-10 07:55:05,801 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2019-09-10 07:55:06,508 WARN L188 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2019-09-10 07:55:06,973 WARN L188 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2019-09-10 07:55:07,301 WARN L188 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2019-09-10 07:55:07,655 WARN L188 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2019-09-10 07:55:08,018 WARN L188 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2019-09-10 07:55:08,512 WARN L188 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2019-09-10 07:55:09,249 WARN L188 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2019-09-10 07:55:09,550 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2019-09-10 07:55:09,934 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2019-09-10 07:55:10,255 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2019-09-10 07:55:10,610 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2019-09-10 07:55:11,001 WARN L188 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2019-09-10 07:55:11,390 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2019-09-10 07:55:11,794 WARN L188 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2019-09-10 07:55:12,087 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2019-09-10 07:55:12,511 WARN L188 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2019-09-10 07:55:12,807 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2019-09-10 07:55:13,322 WARN L188 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2019-09-10 07:55:13,731 WARN L188 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2019-09-10 07:55:14,110 WARN L188 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2019-09-10 07:55:14,494 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2019-09-10 07:55:15,394 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2019-09-10 07:55:15,979 WARN L188 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2019-09-10 07:55:16,326 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2019-09-10 07:55:16,675 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2019-09-10 07:55:17,144 WARN L188 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2019-09-10 07:55:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:55:17,344 INFO L93 Difference]: Finished difference Result 8087 states and 10112 transitions. [2019-09-10 07:55:17,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-10 07:55:17,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2019-09-10 07:55:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:55:17,352 INFO L225 Difference]: With dead ends: 8087 [2019-09-10 07:55:17,352 INFO L226 Difference]: Without dead ends: 8087 [2019-09-10 07:55:17,353 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 235 SyntacticMatches, 25 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=1191, Invalid=3921, Unknown=0, NotChecked=0, Total=5112 [2019-09-10 07:55:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2019-09-10 07:55:17,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 5474. [2019-09-10 07:55:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5474 states. [2019-09-10 07:55:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 6773 transitions. [2019-09-10 07:55:17,401 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 6773 transitions. Word has length 139 [2019-09-10 07:55:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:55:17,401 INFO L475 AbstractCegarLoop]: Abstraction has 5474 states and 6773 transitions. [2019-09-10 07:55:17,402 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-10 07:55:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 6773 transitions. [2019-09-10 07:55:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-10 07:55:17,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:55:17,405 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:55:17,406 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:55:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:55:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash -298203361, now seen corresponding path program 1 times [2019-09-10 07:55:17,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:55:17,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:55:17,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:55:17,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:55:17,407 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:55:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:55:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:17,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:55:17,685 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:55:17,685 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 141 with the following transitions: [2019-09-10 07:55:17,685 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [127], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [174], [176], [179], [182], [184], [199], [201], [204], [207], [209], [217], [220], [226], [229], [232], [234], [242], [245], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:55:17,688 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:55:17,688 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:55:17,700 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:55:18,272 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:55:18,273 INFO L272 AbstractInterpreter]: Visited 84 different actions 1155 times. Merged at 54 different actions 885 times. Widened at 21 different actions 159 times. Performed 3712 root evaluator evaluations with a maximum evaluation depth of 5. Performed 3712 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 175 fixpoints after 23 different actions. Largest state had 109 variables. [2019-09-10 07:55:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:55:18,273 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:55:18,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:55:18,274 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 07:55:18,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:55:18,301 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:55:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:55:18,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-10 07:55:18,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:55:18,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:18,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 23 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:18,969 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:55:19,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:19,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:20,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:21,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:55:21,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2019-09-10 07:55:21,139 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:55:21,140 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-10 07:55:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-10 07:55:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2019-09-10 07:55:21,140 INFO L87 Difference]: Start difference. First operand 5474 states and 6773 transitions. Second operand 20 states. [2019-09-10 07:55:21,666 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-09-10 07:55:22,056 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2019-09-10 07:55:22,534 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2019-09-10 07:55:22,779 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-09-10 07:55:22,974 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-09-10 07:55:23,402 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-09-10 07:55:23,744 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2019-09-10 07:55:23,969 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-09-10 07:55:25,039 WARN L188 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-09-10 07:55:25,604 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-09-10 07:55:25,967 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2019-09-10 07:55:26,270 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-09-10 07:55:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:55:26,286 INFO L93 Difference]: Finished difference Result 6304 states and 7756 transitions. [2019-09-10 07:55:26,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-10 07:55:26,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 140 [2019-09-10 07:55:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:55:26,294 INFO L225 Difference]: With dead ends: 6304 [2019-09-10 07:55:26,294 INFO L226 Difference]: Without dead ends: 6304 [2019-09-10 07:55:26,295 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 243 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=413, Invalid=1227, Unknown=0, NotChecked=0, Total=1640 [2019-09-10 07:55:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2019-09-10 07:55:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 5474. [2019-09-10 07:55:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5474 states. [2019-09-10 07:55:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 6736 transitions. [2019-09-10 07:55:26,331 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 6736 transitions. Word has length 140 [2019-09-10 07:55:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:55:26,331 INFO L475 AbstractCegarLoop]: Abstraction has 5474 states and 6736 transitions. [2019-09-10 07:55:26,331 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-10 07:55:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 6736 transitions. [2019-09-10 07:55:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-10 07:55:26,334 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:55:26,335 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:55:26,335 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:55:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:55:26,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1762866043, now seen corresponding path program 1 times [2019-09-10 07:55:26,335 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:55:26,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:55:26,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:55:26,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:55:26,336 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:55:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:55:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-09-10 07:55:26,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:55:26,667 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:55:26,667 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 142 with the following transitions: [2019-09-10 07:55:26,668 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [167], [172], [174], [176], [179], [182], [184], [192], [195], [201], [204], [207], [209], [217], [220], [226], [229], [232], [234], [249], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:55:26,671 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:55:26,671 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:55:26,683 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:55:27,059 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:55:27,060 INFO L272 AbstractInterpreter]: Visited 85 different actions 1208 times. Merged at 55 different actions 934 times. Widened at 23 different actions 182 times. Performed 3786 root evaluator evaluations with a maximum evaluation depth of 5. Performed 3786 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 180 fixpoints after 24 different actions. Largest state had 109 variables. [2019-09-10 07:55:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:55:27,060 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:55:27,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:55:27,060 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:55:27,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:55:27,070 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:55:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:55:27,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-10 07:55:27,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:55:27,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:27,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:27,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:27,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 07:55:27,527 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:55:27,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:27,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:27,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:27,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:27,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:29,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 48 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 07:55:29,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:55:29,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2019-09-10 07:55:29,407 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:55:29,408 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-10 07:55:29,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-10 07:55:29,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2019-09-10 07:55:29,408 INFO L87 Difference]: Start difference. First operand 5474 states and 6736 transitions. Second operand 21 states. [2019-09-10 07:55:33,728 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2019-09-10 07:55:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:55:33,732 INFO L93 Difference]: Finished difference Result 10968 states and 13333 transitions. [2019-09-10 07:55:33,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-10 07:55:33,732 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 141 [2019-09-10 07:55:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:55:33,743 INFO L225 Difference]: With dead ends: 10968 [2019-09-10 07:55:33,743 INFO L226 Difference]: Without dead ends: 10968 [2019-09-10 07:55:33,744 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 221 SyntacticMatches, 40 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1089, Invalid=3881, Unknown=0, NotChecked=0, Total=4970 [2019-09-10 07:55:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10968 states. [2019-09-10 07:55:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10968 to 3816. [2019-09-10 07:55:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3816 states. [2019-09-10 07:55:33,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 4642 transitions. [2019-09-10 07:55:33,795 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 4642 transitions. Word has length 141 [2019-09-10 07:55:33,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:55:33,796 INFO L475 AbstractCegarLoop]: Abstraction has 3816 states and 4642 transitions. [2019-09-10 07:55:33,796 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-10 07:55:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 4642 transitions. [2019-09-10 07:55:33,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-10 07:55:33,798 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:55:33,798 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:55:33,798 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:55:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:55:33,799 INFO L82 PathProgramCache]: Analyzing trace with hash 908598326, now seen corresponding path program 1 times [2019-09-10 07:55:33,799 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:55:33,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:55:33,800 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:55:33,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:55:33,800 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:55:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:55:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 13 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:34,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:55:34,097 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:55:34,098 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 142 with the following transitions: [2019-09-10 07:55:34,098 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [127], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [174], [176], [179], [182], [184], [192], [195], [201], [204], [207], [209], [226], [229], [232], [234], [242], [245], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:55:34,100 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:55:34,100 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:55:34,112 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:55:34,441 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:55:34,442 INFO L272 AbstractInterpreter]: Visited 83 different actions 1091 times. Merged at 53 different actions 849 times. Widened at 20 different actions 174 times. Performed 3393 root evaluator evaluations with a maximum evaluation depth of 5. Performed 3393 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 152 fixpoints after 23 different actions. Largest state had 109 variables. [2019-09-10 07:55:34,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:55:34,442 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:55:34,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:55:34,442 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:55:34,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:55:34,456 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:55:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:55:34,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-10 07:55:34,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:55:34,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:34,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 17 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:35,064 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:55:35,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:35,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:37,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 13 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:37,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:55:37,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2019-09-10 07:55:37,403 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:55:37,404 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-10 07:55:37,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-10 07:55:37,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2019-09-10 07:55:37,404 INFO L87 Difference]: Start difference. First operand 3816 states and 4642 transitions. Second operand 20 states. [2019-09-10 07:55:37,612 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2019-09-10 07:55:38,116 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2019-09-10 07:55:38,493 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2019-09-10 07:55:38,805 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-09-10 07:55:38,970 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-09-10 07:55:39,387 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-09-10 07:55:39,643 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2019-09-10 07:55:39,875 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-09-10 07:55:40,137 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-09-10 07:55:40,504 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-09-10 07:55:40,829 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2019-09-10 07:55:41,100 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2019-09-10 07:55:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:55:41,111 INFO L93 Difference]: Finished difference Result 4310 states and 5187 transitions. [2019-09-10 07:55:41,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-10 07:55:41,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 141 [2019-09-10 07:55:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:55:41,116 INFO L225 Difference]: With dead ends: 4310 [2019-09-10 07:55:41,116 INFO L226 Difference]: Without dead ends: 4310 [2019-09-10 07:55:41,117 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 244 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=413, Invalid=1227, Unknown=0, NotChecked=0, Total=1640 [2019-09-10 07:55:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-09-10 07:55:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 3816. [2019-09-10 07:55:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3816 states. [2019-09-10 07:55:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 4616 transitions. [2019-09-10 07:55:41,145 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 4616 transitions. Word has length 141 [2019-09-10 07:55:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:55:41,145 INFO L475 AbstractCegarLoop]: Abstraction has 3816 states and 4616 transitions. [2019-09-10 07:55:41,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-10 07:55:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 4616 transitions. [2019-09-10 07:55:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-10 07:55:41,148 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:55:41,148 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:55:41,148 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:55:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:55:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash -707439243, now seen corresponding path program 1 times [2019-09-10 07:55:41,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:55:41,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:55:41,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:55:41,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:55:41,154 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:55:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:55:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 22 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:42,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:55:42,238 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:55:42,238 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 143 with the following transitions: [2019-09-10 07:55:42,240 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [127], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [176], [179], [182], [184], [192], [195], [201], [204], [207], [209], [226], [229], [232], [234], [242], [245], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:55:42,243 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:55:42,243 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:55:42,251 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:55:42,571 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:55:42,571 INFO L272 AbstractInterpreter]: Visited 82 different actions 924 times. Merged at 52 different actions 725 times. Widened at 20 different actions 138 times. Performed 2940 root evaluator evaluations with a maximum evaluation depth of 5. Performed 2940 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 112 fixpoints after 22 different actions. Largest state had 109 variables. [2019-09-10 07:55:42,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:55:42,572 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:55:42,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:55:42,572 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:55:42,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:55:42,585 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:55:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:55:42,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-10 07:55:42,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:55:43,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:43,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:43,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:43,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:44,436 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:55:44,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:44,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:44,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:46,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:46,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:46,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-10 07:55:46,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:46,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:46,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:55:52,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-10 07:55:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:55:52,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:55:52,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18, 17] total 58 [2019-09-10 07:55:52,357 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:55:52,357 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-10 07:55:52,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-10 07:55:52,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2019-09-10 07:55:52,358 INFO L87 Difference]: Start difference. First operand 3816 states and 4616 transitions. Second operand 43 states. [2019-09-10 07:55:52,725 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2019-09-10 07:55:55,125 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2019-09-10 07:55:55,399 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2019-09-10 07:55:55,700 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2019-09-10 07:55:55,958 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2019-09-10 07:55:56,211 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2019-09-10 07:55:56,510 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-09-10 07:55:57,010 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2019-09-10 07:55:57,292 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-09-10 07:55:59,950 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-09-10 07:56:04,369 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2019-09-10 07:56:04,742 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2019-09-10 07:56:05,137 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-09-10 07:56:06,758 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2019-09-10 07:56:07,531 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-09-10 07:56:07,954 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2019-09-10 07:56:09,689 WARN L188 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2019-09-10 07:56:10,869 WARN L188 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2019-09-10 07:56:11,608 WARN L188 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2019-09-10 07:56:12,989 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2019-09-10 07:56:13,526 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-09-10 07:56:13,895 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2019-09-10 07:56:14,406 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-09-10 07:56:14,880 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2019-09-10 07:56:15,987 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2019-09-10 07:56:17,082 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2019-09-10 07:56:18,962 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-09-10 07:56:26,053 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-09-10 07:56:27,359 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2019-09-10 07:56:27,691 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-09-10 07:56:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:56:37,307 INFO L93 Difference]: Finished difference Result 15267 states and 18564 transitions. [2019-09-10 07:56:37,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2019-09-10 07:56:37,308 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 142 [2019-09-10 07:56:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:56:37,319 INFO L225 Difference]: With dead ends: 15267 [2019-09-10 07:56:37,319 INFO L226 Difference]: Without dead ends: 15267 [2019-09-10 07:56:37,322 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 218 SyntacticMatches, 36 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9612 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=3211, Invalid=29009, Unknown=0, NotChecked=0, Total=32220 [2019-09-10 07:56:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15267 states. [2019-09-10 07:56:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15267 to 8750. [2019-09-10 07:56:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8750 states. [2019-09-10 07:56:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 10686 transitions. [2019-09-10 07:56:37,396 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 10686 transitions. Word has length 142 [2019-09-10 07:56:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:56:37,396 INFO L475 AbstractCegarLoop]: Abstraction has 8750 states and 10686 transitions. [2019-09-10 07:56:37,396 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-10 07:56:37,396 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 10686 transitions. [2019-09-10 07:56:37,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-10 07:56:37,400 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:56:37,400 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:56:37,401 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:56:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:56:37,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2089721470, now seen corresponding path program 1 times [2019-09-10 07:56:37,401 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:56:37,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:56:37,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:56:37,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:56:37,402 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:56:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:56:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 22 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:56:37,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:56:37,875 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:56:37,875 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 144 with the following transitions: [2019-09-10 07:56:37,875 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [127], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [176], [179], [182], [184], [192], [195], [201], [204], [207], [209], [226], [229], [232], [234], [242], [245], [247], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:56:37,877 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:56:37,877 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:56:37,890 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:56:38,307 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:56:38,308 INFO L272 AbstractInterpreter]: Visited 82 different actions 839 times. Merged at 52 different actions 653 times. Widened at 18 different actions 109 times. Performed 2694 root evaluator evaluations with a maximum evaluation depth of 5. Performed 2694 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 97 fixpoints after 22 different actions. Largest state had 109 variables. [2019-09-10 07:56:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:56:38,308 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:56:38,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:56:38,308 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:56:38,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:56:38,319 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:56:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:56:38,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-10 07:56:38,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:56:39,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:39,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:39,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:39,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:39,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:40,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 22 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:56:40,553 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:56:41,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:41,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:41,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:42,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:42,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:42,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:42,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-10 07:56:42,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:42,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:42,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:44,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-10 07:56:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 22 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:56:45,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:56:45,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 51 [2019-09-10 07:56:45,121 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:56:45,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-10 07:56:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-10 07:56:45,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2354, Unknown=0, NotChecked=0, Total=2550 [2019-09-10 07:56:45,123 INFO L87 Difference]: Start difference. First operand 8750 states and 10686 transitions. Second operand 35 states. [2019-09-10 07:56:46,172 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2019-09-10 07:56:46,831 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2019-09-10 07:56:47,166 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2019-09-10 07:56:48,081 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2019-09-10 07:56:50,734 WARN L188 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2019-09-10 07:56:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:56:50,797 INFO L93 Difference]: Finished difference Result 14809 states and 18157 transitions. [2019-09-10 07:56:50,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-10 07:56:50,798 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 143 [2019-09-10 07:56:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:56:50,815 INFO L225 Difference]: With dead ends: 14809 [2019-09-10 07:56:50,816 INFO L226 Difference]: Without dead ends: 14742 [2019-09-10 07:56:50,816 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 209 SyntacticMatches, 45 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=590, Invalid=4812, Unknown=0, NotChecked=0, Total=5402 [2019-09-10 07:56:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14742 states. [2019-09-10 07:56:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14742 to 10472. [2019-09-10 07:56:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10472 states. [2019-09-10 07:56:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 12779 transitions. [2019-09-10 07:56:50,898 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 12779 transitions. Word has length 143 [2019-09-10 07:56:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:56:50,899 INFO L475 AbstractCegarLoop]: Abstraction has 10472 states and 12779 transitions. [2019-09-10 07:56:50,899 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-10 07:56:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 12779 transitions. [2019-09-10 07:56:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-10 07:56:50,902 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:56:50,903 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:56:50,903 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:56:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:56:50,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1983767007, now seen corresponding path program 1 times [2019-09-10 07:56:50,903 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:56:50,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:56:50,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:56:50,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:56:50,904 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:56:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:56:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:56:51,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:56:51,414 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:56:51,415 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 144 with the following transitions: [2019-09-10 07:56:51,415 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [127], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [167], [170], [176], [179], [182], [184], [201], [204], [207], [209], [226], [229], [232], [234], [242], [245], [247], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:56:51,416 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:56:51,417 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:56:51,431 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:56:51,615 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:56:51,616 INFO L272 AbstractInterpreter]: Visited 82 different actions 520 times. Merged at 52 different actions 377 times. Widened at 14 different actions 40 times. Performed 1697 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1697 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 55 fixpoints after 14 different actions. Largest state had 109 variables. [2019-09-10 07:56:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:56:51,616 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:56:51,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:56:51,616 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:56:51,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:56:51,627 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:56:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:56:51,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-10 07:56:51,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:56:52,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:52,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:52,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:52,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:56:52,951 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:56:53,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:53,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:53,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:54,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:55,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-10 07:56:55,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:55,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:55,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:56:57,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-10 07:56:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:56:57,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:56:57,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 47 [2019-09-10 07:56:57,700 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:56:57,701 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-10 07:56:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-10 07:56:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1980, Unknown=0, NotChecked=0, Total=2162 [2019-09-10 07:56:57,702 INFO L87 Difference]: Start difference. First operand 10472 states and 12779 transitions. Second operand 32 states. [2019-09-10 07:56:57,884 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2019-09-10 07:57:03,604 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-09-10 07:57:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:57:03,857 INFO L93 Difference]: Finished difference Result 15034 states and 18168 transitions. [2019-09-10 07:57:03,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-10 07:57:03,858 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 143 [2019-09-10 07:57:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:57:03,898 INFO L225 Difference]: With dead ends: 15034 [2019-09-10 07:57:03,898 INFO L226 Difference]: Without dead ends: 15034 [2019-09-10 07:57:03,898 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 212 SyntacticMatches, 46 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=446, Invalid=3714, Unknown=0, NotChecked=0, Total=4160 [2019-09-10 07:57:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15034 states. [2019-09-10 07:57:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15034 to 12298. [2019-09-10 07:57:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12298 states. [2019-09-10 07:57:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12298 states to 12298 states and 14989 transitions. [2019-09-10 07:57:04,030 INFO L78 Accepts]: Start accepts. Automaton has 12298 states and 14989 transitions. Word has length 143 [2019-09-10 07:57:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:57:04,031 INFO L475 AbstractCegarLoop]: Abstraction has 12298 states and 14989 transitions. [2019-09-10 07:57:04,031 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-10 07:57:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states and 14989 transitions. [2019-09-10 07:57:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-10 07:57:04,034 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:57:04,034 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:57:04,035 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:57:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:57:04,035 INFO L82 PathProgramCache]: Analyzing trace with hash -471787544, now seen corresponding path program 1 times [2019-09-10 07:57:04,035 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:57:04,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:57:04,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:57:04,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:57:04,036 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:57:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:57:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:57:05,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:57:05,182 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:57:05,182 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 144 with the following transitions: [2019-09-10 07:57:05,182 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [167], [170], [172], [176], [179], [182], [184], [201], [204], [207], [209], [226], [229], [232], [234], [242], [245], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:57:05,186 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:57:05,187 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:57:05,197 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:57:05,467 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:57:05,468 INFO L272 AbstractInterpreter]: Visited 82 different actions 592 times. Merged at 52 different actions 438 times. Widened at 18 different actions 53 times. Performed 1968 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1968 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 65 fixpoints after 18 different actions. Largest state had 109 variables. [2019-09-10 07:57:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:57:05,468 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:57:05,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:57:05,468 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 07:57:05,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:57:05,487 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:57:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:57:05,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-10 07:57:05,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:57:05,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:05,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:05,792 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:05,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 70 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 07:57:06,101 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:57:06,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:06,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:06,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:06,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:06,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:06,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:06,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:06,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 79 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 07:57:06,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:57:06,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12, 12] total 46 [2019-09-10 07:57:06,735 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:57:06,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-10 07:57:06,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-10 07:57:06,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2019-09-10 07:57:06,736 INFO L87 Difference]: Start difference. First operand 12298 states and 14989 transitions. Second operand 36 states. [2019-09-10 07:57:06,969 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2019-09-10 07:57:08,455 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2019-09-10 07:57:08,711 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2019-09-10 07:57:08,965 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2019-09-10 07:57:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:57:17,475 INFO L93 Difference]: Finished difference Result 18131 states and 21781 transitions. [2019-09-10 07:57:17,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-10 07:57:17,475 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 143 [2019-09-10 07:57:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:57:17,492 INFO L225 Difference]: With dead ends: 18131 [2019-09-10 07:57:17,493 INFO L226 Difference]: Without dead ends: 18131 [2019-09-10 07:57:17,494 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2995 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1347, Invalid=12459, Unknown=0, NotChecked=0, Total=13806 [2019-09-10 07:57:17,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18131 states. [2019-09-10 07:57:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18131 to 11462. [2019-09-10 07:57:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11462 states. [2019-09-10 07:57:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11462 states to 11462 states and 13888 transitions. [2019-09-10 07:57:17,630 INFO L78 Accepts]: Start accepts. Automaton has 11462 states and 13888 transitions. Word has length 143 [2019-09-10 07:57:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:57:17,630 INFO L475 AbstractCegarLoop]: Abstraction has 11462 states and 13888 transitions. [2019-09-10 07:57:17,630 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-10 07:57:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 11462 states and 13888 transitions. [2019-09-10 07:57:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-09-10 07:57:17,635 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:57:17,635 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 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] [2019-09-10 07:57:17,636 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:57:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:57:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1905730485, now seen corresponding path program 1 times [2019-09-10 07:57:17,637 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:57:17,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:57:17,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:57:17,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:57:17,641 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:57:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:57:19,171 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-09-10 07:57:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 41 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:57:19,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:57:19,374 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:57:19,374 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 145 with the following transitions: [2019-09-10 07:57:19,375 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [90], [92], [95], [98], [101], [103], [105], [108], [111], [116], [118], [121], [124], [127], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [176], [179], [182], [184], [192], [195], [197], [201], [204], [207], [209], [226], [229], [232], [234], [242], [245], [247], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:57:19,376 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:57:19,376 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:57:19,386 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:57:19,651 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:57:19,651 INFO L272 AbstractInterpreter]: Visited 82 different actions 598 times. Merged at 52 different actions 445 times. Widened at 16 different actions 50 times. Performed 1941 root evaluator evaluations with a maximum evaluation depth of 5. Performed 1941 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 65 fixpoints after 17 different actions. Largest state had 109 variables. [2019-09-10 07:57:19,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:57:19,652 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:57:19,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:57:19,652 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 07:57:19,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:57:19,682 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:57:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:57:19,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-10 07:57:19,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:57:20,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:20,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:20,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 41 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:57:21,209 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:57:22,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:57:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 41 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:57:22,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:57:22,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 50 [2019-09-10 07:57:22,474 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:57:22,474 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-10 07:57:22,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-10 07:57:22,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2289, Unknown=0, NotChecked=0, Total=2450 [2019-09-10 07:57:22,475 INFO L87 Difference]: Start difference. First operand 11462 states and 13888 transitions. Second operand 37 states. [2019-09-10 07:57:24,869 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2019-09-10 07:57:25,239 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2019-09-10 07:57:25,681 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2019-09-10 07:57:26,095 WARN L188 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2019-09-10 07:57:26,483 WARN L188 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2019-09-10 07:57:26,857 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2019-09-10 07:57:27,266 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2019-09-10 07:57:27,643 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2019-09-10 07:57:28,091 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-09-10 07:57:28,432 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2019-09-10 07:57:28,836 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2019-09-10 07:57:29,649 WARN L188 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2019-09-10 07:57:30,067 WARN L188 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2019-09-10 07:57:31,123 WARN L188 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2019-09-10 07:57:31,511 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2019-09-10 07:57:31,689 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-09-10 07:57:31,959 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2019-09-10 07:57:32,259 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2019-09-10 07:57:33,041 WARN L188 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2019-09-10 07:57:33,267 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2019-09-10 07:57:33,779 WARN L188 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2019-09-10 07:57:34,058 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-09-10 07:57:34,635 WARN L188 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2019-09-10 07:57:34,960 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2019-09-10 07:57:35,444 WARN L188 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2019-09-10 07:57:36,945 WARN L188 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2019-09-10 07:57:37,396 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2019-09-10 07:57:37,924 WARN L188 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2019-09-10 07:57:38,541 WARN L188 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2019-09-10 07:57:38,976 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2019-09-10 07:57:39,337 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2019-09-10 07:57:40,073 WARN L188 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2019-09-10 07:57:40,411 WARN L188 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2019-09-10 07:57:40,878 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2019-09-10 07:57:41,476 WARN L188 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2019-09-10 07:57:41,992 WARN L188 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2019-09-10 07:57:43,006 WARN L188 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2019-09-10 07:57:43,421 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2019-09-10 07:57:44,107 WARN L188 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2019-09-10 07:57:44,410 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2019-09-10 07:57:45,065 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2019-09-10 07:57:45,883 WARN L188 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2019-09-10 07:57:46,573 WARN L188 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2019-09-10 07:57:47,126 WARN L188 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2019-09-10 07:57:47,543 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2019-09-10 07:57:48,282 WARN L188 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2019-09-10 07:57:48,990 WARN L188 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 85 [2019-09-10 07:57:49,283 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2019-09-10 07:57:50,538 WARN L188 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2019-09-10 07:57:51,280 WARN L188 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2019-09-10 07:57:52,020 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2019-09-10 07:57:52,744 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2019-09-10 07:57:53,246 WARN L188 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2019-09-10 07:57:53,845 WARN L188 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2019-09-10 07:57:54,304 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2019-09-10 07:57:54,815 WARN L188 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2019-09-10 07:57:55,812 WARN L188 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2019-09-10 07:57:56,231 WARN L188 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2019-09-10 07:57:56,584 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2019-09-10 07:57:57,118 WARN L188 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2019-09-10 07:57:57,998 WARN L188 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2019-09-10 07:57:58,293 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2019-09-10 07:57:59,002 WARN L188 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 80 [2019-09-10 07:57:59,419 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2019-09-10 07:57:59,645 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2019-09-10 07:58:00,057 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2019-09-10 07:58:00,393 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2019-09-10 07:58:00,694 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-09-10 07:58:00,921 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-09-10 07:58:01,264 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2019-09-10 07:58:01,547 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2019-09-10 07:58:01,779 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-09-10 07:58:02,120 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-09-10 07:58:02,412 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2019-09-10 07:58:02,648 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-09-10 07:58:02,981 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-09-10 07:58:03,376 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-09-10 07:58:03,797 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-09-10 07:58:04,442 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2019-09-10 07:58:04,942 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2019-09-10 07:58:05,319 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2019-09-10 07:58:05,640 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2019-09-10 07:58:05,958 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-09-10 07:58:06,141 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2019-09-10 07:58:06,776 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-09-10 07:58:07,206 WARN L188 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2019-09-10 07:58:07,406 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2019-09-10 07:58:07,883 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2019-09-10 07:58:08,407 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-09-10 07:58:08,835 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-09-10 07:58:09,104 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-09-10 07:58:09,455 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-09-10 07:58:09,747 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-09-10 07:58:09,976 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-09-10 07:58:10,562 WARN L188 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2019-09-10 07:58:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:58:10,964 INFO L93 Difference]: Finished difference Result 24961 states and 30089 transitions. [2019-09-10 07:58:10,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2019-09-10 07:58:10,965 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 144 [2019-09-10 07:58:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:58:10,983 INFO L225 Difference]: With dead ends: 24961 [2019-09-10 07:58:10,984 INFO L226 Difference]: Without dead ends: 24961 [2019-09-10 07:58:10,985 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 255 SyntacticMatches, 7 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7272 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=3288, Invalid=22472, Unknown=0, NotChecked=0, Total=25760 [2019-09-10 07:58:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24961 states. [2019-09-10 07:58:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24961 to 12281. [2019-09-10 07:58:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12281 states. [2019-09-10 07:58:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12281 states to 12281 states and 14874 transitions. [2019-09-10 07:58:11,105 INFO L78 Accepts]: Start accepts. Automaton has 12281 states and 14874 transitions. Word has length 144 [2019-09-10 07:58:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:58:11,105 INFO L475 AbstractCegarLoop]: Abstraction has 12281 states and 14874 transitions. [2019-09-10 07:58:11,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-10 07:58:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 12281 states and 14874 transitions. [2019-09-10 07:58:11,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-09-10 07:58:11,109 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:58:11,110 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:58:11,110 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:58:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:58:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash -238284971, now seen corresponding path program 1 times [2019-09-10 07:58:11,110 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:58:11,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:58:11,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:58:11,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:58:11,112 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:58:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:58:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:58:12,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:58:12,716 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:58:12,716 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 145 with the following transitions: [2019-09-10 07:58:12,716 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [127], [129], [131], [134], [137], [141], [143], [146], [147], [149], [151], [156], [158], [161], [176], [179], [182], [184], [201], [204], [207], [209], [226], [229], [232], [234], [242], [247], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:58:12,717 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:58:12,717 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:58:12,724 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:58:13,055 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:58:13,056 INFO L272 AbstractInterpreter]: Visited 82 different actions 801 times. Merged at 51 different actions 619 times. Widened at 16 different actions 109 times. Performed 2493 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2493 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 103 fixpoints after 20 different actions. Largest state had 109 variables. [2019-09-10 07:58:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:58:13,057 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:58:13,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:58:13,057 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 07:58:13,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:58:13,081 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:58:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:58:13,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-10 07:58:13,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:58:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 11 proven. 87 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-10 07:58:13,588 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:58:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 89 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-10 07:58:13,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:58:13,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 7, 7] total 42 [2019-09-10 07:58:13,931 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:58:13,931 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-10 07:58:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-10 07:58:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1596, Unknown=0, NotChecked=0, Total=1722 [2019-09-10 07:58:13,932 INFO L87 Difference]: Start difference. First operand 12281 states and 14874 transitions. Second operand 37 states. [2019-09-10 07:58:14,381 WARN L188 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 113 [2019-09-10 07:58:15,970 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2019-09-10 07:58:16,200 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2019-09-10 07:58:16,507 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2019-09-10 07:58:16,821 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2019-09-10 07:58:17,219 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2019-09-10 07:58:17,641 WARN L188 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 97 [2019-09-10 07:58:18,242 WARN L188 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2019-09-10 07:58:18,806 WARN L188 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2019-09-10 07:58:19,052 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2019-09-10 07:58:19,470 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2019-09-10 07:58:19,724 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2019-09-10 07:58:20,038 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2019-09-10 07:58:20,367 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2019-09-10 07:58:20,908 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2019-09-10 07:58:21,719 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-09-10 07:58:24,748 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-09-10 07:58:25,178 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2019-09-10 07:58:25,711 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2019-09-10 07:58:26,030 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 89 [2019-09-10 07:58:26,683 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2019-09-10 07:58:27,171 WARN L188 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 108 [2019-09-10 07:58:28,510 WARN L188 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2019-09-10 07:58:29,139 WARN L188 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 130 [2019-09-10 07:58:29,430 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2019-09-10 07:58:29,874 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-09-10 07:58:30,990 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2019-09-10 07:58:31,527 WARN L188 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2019-09-10 07:58:32,577 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2019-09-10 07:58:33,115 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-09-10 07:58:34,002 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-09-10 07:58:36,137 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2019-09-10 07:58:38,789 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2019-09-10 07:58:39,363 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2019-09-10 07:58:39,998 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2019-09-10 07:58:40,367 WARN L188 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2019-09-10 07:58:41,313 WARN L188 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2019-09-10 07:58:41,857 WARN L188 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 110 [2019-09-10 07:58:42,505 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-09-10 07:58:42,765 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-09-10 07:58:43,396 WARN L188 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 124 [2019-09-10 07:58:44,062 WARN L188 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 132 [2019-09-10 07:58:44,379 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2019-09-10 07:58:45,550 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2019-09-10 07:58:45,835 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2019-09-10 07:58:46,271 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2019-09-10 07:58:46,636 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2019-09-10 07:58:47,639 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2019-09-10 07:58:47,876 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2019-09-10 07:58:48,151 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2019-09-10 07:58:48,587 WARN L188 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2019-09-10 07:58:48,974 WARN L188 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2019-09-10 07:58:49,850 WARN L188 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 108 [2019-09-10 07:58:50,389 WARN L188 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 116 [2019-09-10 07:58:50,597 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2019-09-10 07:58:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 07:58:50,653 INFO L93 Difference]: Finished difference Result 19315 states and 22917 transitions. [2019-09-10 07:58:50,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2019-09-10 07:58:50,653 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 144 [2019-09-10 07:58:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 07:58:50,673 INFO L225 Difference]: With dead ends: 19315 [2019-09-10 07:58:50,673 INFO L226 Difference]: Without dead ends: 19282 [2019-09-10 07:58:50,675 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6819 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=2734, Invalid=21136, Unknown=0, NotChecked=0, Total=23870 [2019-09-10 07:58:50,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19282 states. [2019-09-10 07:58:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19282 to 14688. [2019-09-10 07:58:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14688 states. [2019-09-10 07:58:50,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14688 states to 14688 states and 17391 transitions. [2019-09-10 07:58:50,794 INFO L78 Accepts]: Start accepts. Automaton has 14688 states and 17391 transitions. Word has length 144 [2019-09-10 07:58:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 07:58:50,794 INFO L475 AbstractCegarLoop]: Abstraction has 14688 states and 17391 transitions. [2019-09-10 07:58:50,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-10 07:58:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 14688 states and 17391 transitions. [2019-09-10 07:58:50,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-09-10 07:58:50,797 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 07:58:50,797 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 07:58:50,797 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 07:58:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:58:50,797 INFO L82 PathProgramCache]: Analyzing trace with hash 878842041, now seen corresponding path program 1 times [2019-09-10 07:58:50,798 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 07:58:50,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:58:50,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:58:50,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 07:58:50,798 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 07:58:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:58:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 32 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:58:51,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:58:51,838 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 07:58:51,838 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 145 with the following transitions: [2019-09-10 07:58:51,839 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [116], [118], [121], [124], [127], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [165], [167], [172], [176], [179], [182], [184], [192], [195], [197], [201], [204], [207], [209], [217], [220], [226], [229], [232], [234], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 07:58:51,840 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 07:58:51,840 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 07:58:51,847 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 07:58:52,175 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 07:58:52,175 INFO L272 AbstractInterpreter]: Visited 84 different actions 1028 times. Merged at 54 different actions 802 times. Widened at 19 different actions 133 times. Performed 3166 root evaluator evaluations with a maximum evaluation depth of 5. Performed 3166 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 137 fixpoints after 23 different actions. Largest state had 109 variables. [2019-09-10 07:58:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 07:58:52,176 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 07:58:52,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 07:58:52,176 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 07:58:52,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 07:58:52,196 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 07:58:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 07:58:52,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-10 07:58:52,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 07:58:52,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:52,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:52,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:52,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:52,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:52,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 39 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:58:52,810 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 07:58:52,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:53,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:53,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:53,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:53,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 07:58:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 52 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 07:58:53,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 07:58:53,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 37 [2019-09-10 07:58:53,275 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 07:58:53,276 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-10 07:58:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-10 07:58:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2019-09-10 07:58:53,276 INFO L87 Difference]: Start difference. First operand 14688 states and 17391 transitions. Second operand 28 states. [2019-09-10 07:58:53,450 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2019-09-10 07:58:54,669 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2019-09-10 07:58:54,988 WARN L188 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2019-09-10 07:58:55,261 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2019-09-10 07:58:55,555 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2019-09-10 07:58:55,918 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2019-09-10 07:58:56,264 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2019-09-10 07:58:56,525 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2019-09-10 07:58:56,815 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-09-10 07:58:57,025 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2019-09-10 07:58:57,287 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2019-09-10 07:58:57,505 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2019-09-10 07:58:57,814 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2019-09-10 07:58:58,072 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2019-09-10 07:58:58,558 WARN L188 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2019-09-10 07:58:58,755 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2019-09-10 07:58:59,012 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2019-09-10 07:58:59,348 WARN L188 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2019-09-10 07:58:59,602 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-09-10 07:58:59,900 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2019-09-10 07:59:00,156 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2019-09-10 07:59:00,357 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2019-09-10 07:59:00,745 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2019-09-10 07:59:01,090 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2019-09-10 07:59:01,448 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2019-09-10 07:59:01,629 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2019-09-10 07:59:02,004 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2019-09-10 07:59:02,241 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2019-09-10 07:59:02,448 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2019-09-10 07:59:02,636 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2019-09-10 07:59:02,807 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2019-09-10 07:59:03,114 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2019-09-10 07:59:03,336 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-09-10 07:59:03,622 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2019-09-10 07:59:03,896 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2019-09-10 07:59:04,136 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2019-09-10 07:59:04,490 WARN L188 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2019-09-10 07:59:04,805 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2019-09-10 07:59:05,120 WARN L188 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2019-09-10 07:59:05,445 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-09-10 07:59:05,699 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2019-09-10 07:59:06,112 WARN L188 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2019-09-10 07:59:06,508 WARN L188 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2019-09-10 07:59:06,861 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2019-09-10 07:59:07,325 WARN L188 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2019-09-10 07:59:07,768 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2019-09-10 07:59:08,230 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2019-09-10 07:59:08,452 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-09-10 07:59:08,915 WARN L188 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2019-09-10 07:59:09,309 WARN L188 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2019-09-10 07:59:09,578 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2019-09-10 07:59:09,750 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2019-09-10 07:59:10,075 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2019-09-10 07:59:10,442 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2019-09-10 07:59:10,816 WARN L188 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2019-09-10 07:59:11,191 WARN L188 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2019-09-10 07:59:11,486 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2019-09-10 07:59:11,782 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-09-10 07:59:11,974 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2019-09-10 07:59:12,397 WARN L188 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 97 [2019-09-10 07:59:12,857 WARN L188 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2019-09-10 07:59:13,072 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2019-09-10 07:59:13,491 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2019-09-10 07:59:13,711 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2019-09-10 07:59:13,988 WARN L188 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2019-09-10 07:59:14,455 WARN L188 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 99 [2019-09-10 07:59:14,662 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2019-09-10 07:59:14,987 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2019-09-10 07:59:15,285 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2019-09-10 07:59:15,722 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2019-09-10 07:59:16,022 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2019-09-10 07:59:16,370 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2019-09-10 07:59:16,744 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2019-09-10 07:59:17,363 WARN L188 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2019-09-10 07:59:17,653 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2019-09-10 07:59:18,141 WARN L188 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2019-09-10 07:59:18,370 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2019-09-10 07:59:18,809 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2019-09-10 07:59:19,282 WARN L188 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2019-09-10 07:59:19,559 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-09-10 07:59:19,796 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2019-09-10 07:59:20,245 WARN L188 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 102 [2019-09-10 07:59:20,734 WARN L188 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2019-09-10 07:59:21,180 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 99 [2019-09-10 07:59:21,443 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2019-09-10 07:59:21,719 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2019-09-10 07:59:22,193 WARN L188 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 104 [2019-09-10 07:59:22,475 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2019-09-10 07:59:22,938 WARN L188 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2019-09-10 07:59:23,391 WARN L188 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 102 [2019-09-10 07:59:23,887 WARN L188 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 99 [2019-09-10 07:59:24,150 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-09-10 07:59:24,821 WARN L188 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 104 [2019-09-10 07:59:25,130 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2019-09-10 07:59:25,518 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2019-09-10 07:59:25,939 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2019-09-10 07:59:26,520 WARN L188 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2019-09-10 07:59:27,007 WARN L188 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2019-09-10 07:59:27,520 WARN L188 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2019-09-10 07:59:28,097 WARN L188 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2019-09-10 07:59:28,594 WARN L188 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2019-09-10 07:59:29,064 WARN L188 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2019-09-10 07:59:29,584 WARN L188 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2019-09-10 07:59:30,090 WARN L188 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2019-09-10 07:59:30,579 WARN L188 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2019-09-10 07:59:31,075 WARN L188 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2019-09-10 07:59:31,413 WARN L188 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2019-09-10 07:59:31,766 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2019-09-10 07:59:32,152 WARN L188 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2019-09-10 07:59:32,533 WARN L188 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2019-09-10 07:59:32,765 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-09-10 07:59:33,217 WARN L188 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2019-09-10 07:59:33,521 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2019-09-10 07:59:33,941 WARN L188 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 94 [2019-09-10 07:59:34,394 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2019-09-10 07:59:34,693 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2019-09-10 07:59:35,141 WARN L188 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2019-09-10 07:59:35,573 WARN L188 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2019-09-10 07:59:36,077 WARN L188 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2019-09-10 07:59:36,505 WARN L188 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2019-09-10 07:59:36,760 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-09-10 07:59:37,073 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2019-09-10 07:59:37,573 WARN L188 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2019-09-10 07:59:37,797 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2019-09-10 07:59:38,197 WARN L188 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2019-09-10 07:59:38,622 WARN L188 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2019-09-10 07:59:39,070 WARN L188 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2019-09-10 07:59:39,335 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-09-10 07:59:39,758 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2019-09-10 07:59:40,054 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-09-10 07:59:40,589 WARN L188 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2019-09-10 07:59:41,047 WARN L188 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2019-09-10 07:59:41,433 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2019-09-10 07:59:41,800 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2019-09-10 07:59:42,148 WARN L188 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2019-09-10 07:59:42,849 WARN L188 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2019-09-10 07:59:43,215 WARN L188 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2019-09-10 07:59:43,557 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2019-09-10 07:59:44,239 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2019-09-10 07:59:44,562 WARN L188 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2019-09-10 07:59:44,739 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2019-09-10 07:59:44,985 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2019-09-10 07:59:45,409 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2019-09-10 07:59:45,759 WARN L188 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2019-09-10 07:59:46,038 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-09-10 07:59:46,342 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2019-09-10 07:59:46,503 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2019-09-10 07:59:46,888 WARN L188 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2019-09-10 07:59:47,202 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2019-09-10 07:59:47,525 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2019-09-10 07:59:47,803 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2019-09-10 07:59:48,036 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2019-09-10 07:59:48,324 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2019-09-10 07:59:48,643 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2019-09-10 07:59:49,023 WARN L188 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2019-09-10 07:59:49,358 WARN L188 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2019-09-10 07:59:49,742 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2019-09-10 07:59:50,062 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2019-09-10 07:59:50,292 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-09-10 07:59:50,715 WARN L188 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2019-09-10 07:59:51,008 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2019-09-10 07:59:51,247 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2019-09-10 07:59:51,458 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2019-09-10 07:59:51,643 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2019-09-10 07:59:51,938 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2019-09-10 07:59:52,180 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2019-09-10 07:59:52,592 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2019-09-10 07:59:53,011 WARN L188 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2019-09-10 07:59:53,316 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2019-09-10 07:59:53,532 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-09-10 07:59:53,820 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2019-09-10 07:59:54,254 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2019-09-10 07:59:54,574 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2019-09-10 07:59:54,979 WARN L188 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2019-09-10 07:59:55,243 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2019-09-10 07:59:55,645 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2019-09-10 07:59:55,972 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2019-09-10 07:59:56,172 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2019-09-10 07:59:56,450 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2019-09-10 07:59:56,888 WARN L188 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 98 [2019-09-10 07:59:57,281 WARN L188 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2019-09-10 07:59:57,669 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2019-09-10 07:59:57,991 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2019-09-10 07:59:58,452 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2019-09-10 07:59:58,805 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2019-09-10 07:59:59,220 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2019-09-10 07:59:59,611 WARN L188 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2019-09-10 07:59:59,958 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2019-09-10 08:00:00,192 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2019-09-10 08:00:00,633 WARN L188 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2019-09-10 08:00:01,024 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2019-09-10 08:00:01,560 WARN L188 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2019-09-10 08:00:01,894 WARN L188 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2019-09-10 08:00:02,288 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2019-09-10 08:00:02,759 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2019-09-10 08:00:03,170 WARN L188 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2019-09-10 08:00:03,564 WARN L188 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2019-09-10 08:00:04,074 WARN L188 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 96 [2019-09-10 08:00:04,534 WARN L188 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2019-09-10 08:00:05,043 WARN L188 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2019-09-10 08:00:05,371 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2019-09-10 08:00:05,639 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2019-09-10 08:00:05,813 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2019-09-10 08:00:06,298 WARN L188 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2019-09-10 08:00:06,653 WARN L188 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2019-09-10 08:00:07,200 WARN L188 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 100 [2019-09-10 08:00:07,590 WARN L188 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2019-09-10 08:00:07,994 WARN L188 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2019-09-10 08:00:08,197 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2019-09-10 08:00:08,454 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2019-09-10 08:00:08,856 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2019-09-10 08:00:09,105 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2019-09-10 08:00:09,303 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2019-09-10 08:00:09,531 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2019-09-10 08:00:09,984 WARN L188 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2019-09-10 08:00:10,193 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2019-09-10 08:00:10,733 WARN L188 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 102 [2019-09-10 08:00:10,971 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2019-09-10 08:00:11,267 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2019-09-10 08:00:12,024 WARN L188 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2019-09-10 08:00:12,490 WARN L188 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2019-09-10 08:00:13,052 WARN L188 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2019-09-10 08:00:13,338 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2019-09-10 08:00:13,784 WARN L188 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 91 [2019-09-10 08:00:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 08:00:14,125 INFO L93 Difference]: Finished difference Result 28706 states and 34011 transitions. [2019-09-10 08:00:14,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 278 states. [2019-09-10 08:00:14,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 144 [2019-09-10 08:00:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 08:00:14,148 INFO L225 Difference]: With dead ends: 28706 [2019-09-10 08:00:14,148 INFO L226 Difference]: Without dead ends: 28706 [2019-09-10 08:00:14,151 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35975 ImplicationChecksByTransitivity, 74.8s TimeCoverageRelationStatistics Valid=10501, Invalid=84055, Unknown=0, NotChecked=0, Total=94556 [2019-09-10 08:00:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28706 states. [2019-09-10 08:00:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28706 to 19072. [2019-09-10 08:00:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19072 states. [2019-09-10 08:00:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19072 states to 19072 states and 22587 transitions. [2019-09-10 08:00:14,339 INFO L78 Accepts]: Start accepts. Automaton has 19072 states and 22587 transitions. Word has length 144 [2019-09-10 08:00:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 08:00:14,339 INFO L475 AbstractCegarLoop]: Abstraction has 19072 states and 22587 transitions. [2019-09-10 08:00:14,340 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-10 08:00:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 19072 states and 22587 transitions. [2019-09-10 08:00:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-10 08:00:14,343 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 08:00:14,343 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 08:00:14,343 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 08:00:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 08:00:14,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2033991714, now seen corresponding path program 1 times [2019-09-10 08:00:14,344 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 08:00:14,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 08:00:14,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 08:00:14,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 08:00:14,345 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 08:00:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 08:00:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 28 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 08:00:17,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 08:00:17,437 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 08:00:17,437 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2019-09-10 08:00:17,438 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [116], [118], [121], [124], [127], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [163], [176], [179], [182], [184], [192], [195], [197], [201], [204], [207], [209], [226], [229], [232], [234], [242], [247], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 08:00:17,441 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 08:00:17,441 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 08:00:17,448 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 08:00:17,684 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 08:00:17,685 INFO L272 AbstractInterpreter]: Visited 82 different actions 692 times. Merged at 52 different actions 527 times. Widened at 15 different actions 67 times. Performed 2202 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2202 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 80 fixpoints after 18 different actions. Largest state had 109 variables. [2019-09-10 08:00:17,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 08:00:17,685 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 08:00:17,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 08:00:17,685 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 08:00:17,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 08:00:17,698 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 08:00:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 08:00:17,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-10 08:00:17,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 08:00:19,447 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-09-10 08:00:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 28 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 08:00:20,439 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 08:00:20,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:00:21,698 WARN L188 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2019-09-10 08:00:21,961 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2019-09-10 08:00:22,739 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-09-10 08:00:22,749 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-09-10 08:00:23,025 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2019-09-10 08:00:23,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:00:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 28 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 08:00:24,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 08:00:24,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22, 21] total 68 [2019-09-10 08:00:24,087 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 08:00:24,088 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-10 08:00:24,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-10 08:00:24,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4308, Unknown=0, NotChecked=0, Total=4556 [2019-09-10 08:00:24,088 INFO L87 Difference]: Start difference. First operand 19072 states and 22587 transitions. Second operand 52 states. [2019-09-10 08:00:26,921 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2019-09-10 08:00:27,286 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 52 [2019-09-10 08:00:27,665 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2019-09-10 08:00:28,147 WARN L188 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 70 [2019-09-10 08:00:28,655 WARN L188 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 85 [2019-09-10 08:00:29,018 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2019-09-10 08:00:29,392 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2019-09-10 08:00:29,757 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2019-09-10 08:00:30,077 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2019-09-10 08:00:30,546 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2019-09-10 08:00:30,946 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 56 [2019-09-10 08:00:31,374 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2019-09-10 08:00:31,682 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2019-09-10 08:00:32,266 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2019-09-10 08:00:32,628 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2019-09-10 08:00:33,211 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2019-09-10 08:00:33,563 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 51 [2019-09-10 08:00:33,861 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2019-09-10 08:00:35,351 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2019-09-10 08:00:36,117 WARN L188 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2019-09-10 08:00:36,632 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-09-10 08:00:36,892 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2019-09-10 08:00:37,652 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2019-09-10 08:00:37,969 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2019-09-10 08:00:38,909 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2019-09-10 08:00:39,614 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 59 [2019-09-10 08:00:40,975 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2019-09-10 08:00:41,573 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2019-09-10 08:00:42,051 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2019-09-10 08:00:42,485 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2019-09-10 08:00:43,763 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2019-09-10 08:00:45,144 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 61 [2019-09-10 08:00:45,575 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2019-09-10 08:00:46,225 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2019-09-10 08:00:46,695 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2019-09-10 08:00:47,093 WARN L188 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 59 [2019-09-10 08:00:47,452 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2019-09-10 08:00:48,230 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2019-09-10 08:00:48,543 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2019-09-10 08:00:52,947 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2019-09-10 08:00:55,110 WARN L188 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 61 [2019-09-10 08:00:55,989 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2019-09-10 08:00:56,429 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 55 [2019-09-10 08:00:56,994 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2019-09-10 08:00:59,551 WARN L188 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 63 [2019-09-10 08:01:00,044 WARN L188 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2019-09-10 08:01:00,342 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2019-09-10 08:01:00,664 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2019-09-10 08:01:01,034 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2019-09-10 08:01:01,507 WARN L188 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 57 [2019-09-10 08:01:01,936 WARN L188 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 69 [2019-09-10 08:01:02,601 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2019-09-10 08:01:06,209 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 35 [2019-09-10 08:01:06,674 WARN L188 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 43 [2019-09-10 08:01:07,621 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2019-09-10 08:01:07,996 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 48 [2019-09-10 08:01:08,628 WARN L188 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 46 [2019-09-10 08:01:09,198 WARN L188 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 54 [2019-09-10 08:01:10,064 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2019-09-10 08:01:10,373 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-09-10 08:01:10,821 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 50 [2019-09-10 08:01:11,288 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-09-10 08:01:11,910 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 42 [2019-09-10 08:01:12,356 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 50 [2019-09-10 08:01:12,981 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-09-10 08:01:15,641 WARN L188 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 107 DAG size of output: 55 [2019-09-10 08:01:15,863 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2019-09-10 08:01:17,758 WARN L188 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 119 DAG size of output: 61 [2019-09-10 08:01:17,989 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-09-10 08:01:19,459 WARN L188 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2019-09-10 08:01:19,797 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2019-09-10 08:01:22,638 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 61 [2019-09-10 08:01:22,874 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-09-10 08:01:23,663 WARN L188 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2019-09-10 08:01:25,737 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 50 [2019-09-10 08:01:26,348 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2019-09-10 08:01:26,754 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-09-10 08:01:30,125 WARN L188 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2019-09-10 08:01:31,836 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 52 [2019-09-10 08:01:32,375 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2019-09-10 08:01:33,460 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 50 [2019-09-10 08:01:35,708 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2019-09-10 08:01:36,438 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 41 [2019-09-10 08:01:37,533 WARN L188 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2019-09-10 08:01:38,469 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 43 [2019-09-10 08:01:39,677 WARN L188 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 50 [2019-09-10 08:01:41,309 WARN L188 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-09-10 08:01:41,911 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 44 [2019-09-10 08:01:42,724 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 42 [2019-09-10 08:01:45,916 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2019-09-10 08:01:46,345 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2019-09-10 08:01:46,566 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2019-09-10 08:01:47,031 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 49 [2019-09-10 08:01:47,283 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2019-09-10 08:01:53,601 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 48 [2019-09-10 08:01:54,137 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2019-09-10 08:01:54,725 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2019-09-10 08:01:55,328 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 48 [2019-09-10 08:01:55,946 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2019-09-10 08:01:56,502 WARN L188 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 41 [2019-09-10 08:01:56,745 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2019-09-10 08:01:57,024 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 42 [2019-09-10 08:01:57,348 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2019-09-10 08:01:57,765 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2019-09-10 08:01:58,720 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 47 [2019-09-10 08:01:59,364 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2019-09-10 08:01:59,909 WARN L188 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 43 [2019-09-10 08:02:00,360 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2019-09-10 08:02:00,715 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 44 [2019-09-10 08:02:01,007 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2019-09-10 08:02:02,005 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 41 [2019-09-10 08:02:02,570 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 49 [2019-09-10 08:02:02,749 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2019-09-10 08:02:03,156 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 42 [2019-09-10 08:02:03,618 WARN L188 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 45 [2019-09-10 08:02:04,112 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2019-09-10 08:02:04,528 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 46 [2019-09-10 08:02:05,376 WARN L188 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-09-10 08:02:05,766 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2019-09-10 08:02:06,315 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2019-09-10 08:02:06,638 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2019-09-10 08:02:07,041 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 40 [2019-09-10 08:02:07,322 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 43 [2019-09-10 08:02:07,906 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 51 [2019-09-10 08:02:08,095 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2019-09-10 08:02:08,443 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2019-09-10 08:02:08,767 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2019-09-10 08:02:09,550 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2019-09-10 08:02:09,806 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2019-09-10 08:02:10,194 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 49 [2019-09-10 08:02:10,665 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 42 [2019-09-10 08:02:11,624 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 47 [2019-09-10 08:02:12,579 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 46 [2019-09-10 08:02:12,812 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2019-09-10 08:02:13,016 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2019-09-10 08:02:13,475 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 44 [2019-09-10 08:02:13,789 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2019-09-10 08:02:14,752 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 46 [2019-09-10 08:02:15,364 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 49 [2019-09-10 08:02:15,879 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 38 [2019-09-10 08:02:16,221 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 45 [2019-09-10 08:02:16,530 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2019-09-10 08:02:16,946 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 46 [2019-09-10 08:02:17,404 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 51 [2019-09-10 08:02:18,117 WARN L188 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 40 [2019-09-10 08:02:18,808 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 43 [2019-09-10 08:02:19,035 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2019-09-10 08:02:19,395 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 49 [2019-09-10 08:02:19,772 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2019-09-10 08:02:19,970 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2019-09-10 08:02:20,276 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 45 [2019-09-10 08:02:22,495 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2019-09-10 08:02:22,775 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2019-09-10 08:02:23,207 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 56 [2019-09-10 08:02:23,443 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2019-09-10 08:02:23,818 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2019-09-10 08:02:24,239 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 52 [2019-09-10 08:02:24,556 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 47 [2019-09-10 08:02:25,044 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2019-09-10 08:02:25,209 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2019-09-10 08:02:25,610 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2019-09-10 08:02:27,949 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 52 [2019-09-10 08:02:28,596 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 47 [2019-09-10 08:02:32,767 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2019-09-10 08:02:37,429 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 56 [2019-09-10 08:02:42,236 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2019-09-10 08:02:51,777 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2019-09-10 08:02:55,872 WARN L188 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 115 DAG size of output: 56 [2019-09-10 08:02:59,355 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2019-09-10 08:02:59,660 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2019-09-10 08:03:04,494 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2019-09-10 08:03:07,586 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 47 [2019-09-10 08:03:12,160 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2019-09-10 08:03:12,808 WARN L188 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2019-09-10 08:03:13,664 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 36 [2019-09-10 08:03:15,313 WARN L188 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-09-10 08:03:15,610 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2019-09-10 08:03:16,081 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2019-09-10 08:03:16,552 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2019-09-10 08:03:17,653 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 34 [2019-09-10 08:03:18,337 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 39 [2019-09-10 08:03:20,335 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2019-09-10 08:03:20,826 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 36 [2019-09-10 08:03:21,226 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 43 [2019-09-10 08:03:22,436 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 38 [2019-09-10 08:03:23,474 WARN L188 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-09-10 08:03:23,965 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 36 [2019-09-10 08:03:24,246 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 40 [2019-09-10 08:03:24,590 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2019-09-10 08:03:24,856 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2019-09-10 08:03:25,260 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 39 [2019-09-10 08:03:25,727 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 36 [2019-09-10 08:03:27,232 WARN L188 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2019-09-10 08:03:27,944 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2019-09-10 08:03:31,518 WARN L188 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 105 DAG size of output: 41 [2019-09-10 08:03:33,463 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 36 [2019-09-10 08:03:33,931 WARN L188 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 41 [2019-09-10 08:03:34,284 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 35 [2019-09-10 08:03:34,686 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2019-09-10 08:03:34,977 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 37 [2019-09-10 08:03:39,551 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2019-09-10 08:03:40,148 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 37 [2019-09-10 08:03:42,919 WARN L188 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 103 DAG size of output: 50 [2019-09-10 08:03:49,247 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2019-09-10 08:03:51,930 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2019-09-10 08:03:54,375 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39 [2019-09-10 08:03:54,630 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2019-09-10 08:03:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 08:03:56,673 INFO L93 Difference]: Finished difference Result 53908 states and 64702 transitions. [2019-09-10 08:03:56,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 357 states. [2019-09-10 08:03:56,673 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 145 [2019-09-10 08:03:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 08:03:56,719 INFO L225 Difference]: With dead ends: 53908 [2019-09-10 08:03:56,719 INFO L226 Difference]: Without dead ends: 53908 [2019-09-10 08:03:56,724 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 253 SyntacticMatches, 3 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64953 ImplicationChecksByTransitivity, 144.9s TimeCoverageRelationStatistics Valid=13790, Invalid=158818, Unknown=32, NotChecked=0, Total=172640 [2019-09-10 08:03:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53908 states. [2019-09-10 08:03:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53908 to 30050. [2019-09-10 08:03:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30050 states. [2019-09-10 08:03:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30050 states to 30050 states and 35917 transitions. [2019-09-10 08:03:57,126 INFO L78 Accepts]: Start accepts. Automaton has 30050 states and 35917 transitions. Word has length 145 [2019-09-10 08:03:57,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 08:03:57,126 INFO L475 AbstractCegarLoop]: Abstraction has 30050 states and 35917 transitions. [2019-09-10 08:03:57,126 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-10 08:03:57,126 INFO L276 IsEmpty]: Start isEmpty. Operand 30050 states and 35917 transitions. [2019-09-10 08:03:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-10 08:03:57,129 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 08:03:57,129 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 08:03:57,129 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 08:03:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 08:03:57,130 INFO L82 PathProgramCache]: Analyzing trace with hash 811150074, now seen corresponding path program 1 times [2019-09-10 08:03:57,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 08:03:57,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 08:03:57,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 08:03:57,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 08:03:57,131 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 08:03:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 08:03:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 47 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 08:03:57,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 08:03:57,413 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 08:03:57,413 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2019-09-10 08:03:57,413 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [163], [167], [170], [172], [176], [179], [182], [184], [201], [204], [207], [209], [226], [229], [232], [234], [242], [247], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 08:03:57,415 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 08:03:57,415 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 08:03:57,426 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 08:03:57,702 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 08:03:57,703 INFO L272 AbstractInterpreter]: Visited 82 different actions 760 times. Merged at 52 different actions 586 times. Widened at 16 different actions 93 times. Performed 2441 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2441 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 89 fixpoints after 23 different actions. Largest state had 109 variables. [2019-09-10 08:03:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 08:03:57,703 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 08:03:57,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 08:03:57,703 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 08:03:57,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 08:03:57,715 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 08:03:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 08:03:57,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-10 08:03:57,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 08:03:57,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:57,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:57,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:58,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:58,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:58,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 76 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 08:03:58,180 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 08:03:58,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:58,376 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:58,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:58,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:58,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:03:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 85 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 08:03:58,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 08:03:58,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 30 [2019-09-10 08:03:58,510 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 08:03:58,510 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-10 08:03:58,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-10 08:03:58,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2019-09-10 08:03:58,511 INFO L87 Difference]: Start difference. First operand 30050 states and 35917 transitions. Second operand 24 states. [2019-09-10 08:04:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 08:04:00,772 INFO L93 Difference]: Finished difference Result 36386 states and 43794 transitions. [2019-09-10 08:04:00,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-10 08:04:00,773 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2019-09-10 08:04:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 08:04:00,803 INFO L225 Difference]: With dead ends: 36386 [2019-09-10 08:04:00,803 INFO L226 Difference]: Without dead ends: 36386 [2019-09-10 08:04:00,804 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=661, Invalid=2879, Unknown=0, NotChecked=0, Total=3540 [2019-09-10 08:04:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36386 states. [2019-09-10 08:04:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36386 to 28231. [2019-09-10 08:04:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28231 states. [2019-09-10 08:04:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28231 states to 28231 states and 33758 transitions. [2019-09-10 08:04:01,066 INFO L78 Accepts]: Start accepts. Automaton has 28231 states and 33758 transitions. Word has length 145 [2019-09-10 08:04:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 08:04:01,066 INFO L475 AbstractCegarLoop]: Abstraction has 28231 states and 33758 transitions. [2019-09-10 08:04:01,066 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-10 08:04:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 28231 states and 33758 transitions. [2019-09-10 08:04:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-10 08:04:01,069 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 08:04:01,069 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 08:04:01,069 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 08:04:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 08:04:01,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1049122849, now seen corresponding path program 1 times [2019-09-10 08:04:01,069 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 08:04:01,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 08:04:01,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 08:04:01,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 08:04:01,071 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 08:04:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 08:04:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 19 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 08:04:03,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 08:04:03,436 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 08:04:03,437 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 146 with the following transitions: [2019-09-10 08:04:03,437 INFO L207 CegarAbsIntRunner]: [0], [3], [6], [9], [12], [15], [18], [21], [24], [27], [30], [33], [36], [39], [42], [45], [48], [51], [54], [57], [60], [63], [66], [69], [72], [74], [77], [82], [85], [88], [90], [92], [95], [98], [101], [103], [105], [108], [111], [114], [116], [118], [121], [124], [129], [131], [134], [141], [143], [146], [147], [149], [158], [161], [163], [167], [170], [172], [176], [179], [182], [184], [201], [204], [207], [209], [217], [222], [226], [229], [232], [234], [251], [253], [256], [259], [261], [294], [295], [299], [300], [301] [2019-09-10 08:04:03,439 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 08:04:03,439 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 08:04:03,450 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 08:04:03,707 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 08:04:03,708 INFO L272 AbstractInterpreter]: Visited 82 different actions 846 times. Merged at 52 different actions 657 times. Widened at 20 different actions 125 times. Performed 2767 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2767 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 104 fixpoints after 23 different actions. Largest state had 109 variables. [2019-09-10 08:04:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 08:04:03,708 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 08:04:03,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 08:04:03,709 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 08:04:03,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 08:04:03,869 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 08:04:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 08:04:04,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-10 08:04:04,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 08:04:04,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 08:04:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 23 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 08:04:05,190 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 08:04:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 19 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 08:04:06,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 08:04:06,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18, 17] total 56 [2019-09-10 08:04:06,563 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 08:04:06,563 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-10 08:04:06,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-10 08:04:06,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2868, Unknown=0, NotChecked=0, Total=3080 [2019-09-10 08:04:06,564 INFO L87 Difference]: Start difference. First operand 28231 states and 33758 transitions. Second operand 44 states. [2019-09-10 08:04:08,421 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2019-09-10 08:04:08,683 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 38 [2019-09-10 08:04:08,997 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2019-09-10 08:04:09,281 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 39 [2019-09-10 08:04:09,683 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 39 [2019-09-10 08:04:09,947 WARN L188 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2019-09-10 08:04:10,315 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2019-09-10 08:04:10,712 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2019-09-10 08:04:11,206 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2019-09-10 08:04:11,763 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 30 [2019-09-10 08:04:12,395 WARN L188 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-09-10 08:04:14,923 WARN L188 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2019-09-10 08:04:15,289 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 37 [2019-09-10 08:04:15,643 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 40 [2019-09-10 08:04:16,599 WARN L188 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74